CN214544063U

CN214544063U - Elastic member and vibration motor

Info

Publication number: CN214544063U
Application number: CN202023060097.5U
Authority: CN
Inventors: 马杰; 毛路斌
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Microtech Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Microtech Changzhou Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-10-29
Anticipated expiration: 2030-12-17
Also published as: WO2022126770A1

Abstract

The utility model provides an elastic component and vibrating motor relates to electromagnetic motion technical field. The elastic piece comprises a plurality of elastic pieces which are sequentially arranged along a first direction and are connected end to end, a deformation area is formed between every two adjacent elastic pieces, and the size of the deformation area is changed by the approach and the distance of the elastic pieces, so that restoring force is provided for the vibrator component; this shell fragment includes the elastic arm and is located the fixed part at elastic arm both ends, and adjacent shell fragment symmetry sets up and connects through respective fixed part to make the hookup location between the adjacent shell fragment even as an organic whole through the fixed part, avoid forming that the shared space that has the fillet of bigger size and bring is great, shaping stress and the great problem of the shaping degree of difficulty.

Description

Elastic member and vibration motor

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electromagnetic motion technical field, concretely relates to elastic component and vibrating motor.

[ background of the invention ]

The vibrator in the conventional vibration motor provides support and restoring force by the elastic member. The bending part of the existing elastic part, such as the fillet bending part of the V-shaped elastic part, has a larger size, so that the occupied space of the bending part is larger, which affects the layout of each structural component in the vibration motor, and the bending part has a larger forming stress, which is easy to cause fatigue fracture when in use. In addition, when the material for manufacturing the elastic member is thick, the difficulty of forming the bent portion is increased.

[ Utility model ] content

An object of the utility model is to provide an elastic component and vibrating motor aims at solving the great overall arrangement and the great problem of the kink shaping stress and the shaping degree of difficulty of each structural component among the great influence vibrating motor of kink size of current elastic component.

In order to solve the above problems, the first technical solution of the present invention is as follows:

the utility model provides an elastic piece, includes along the first direction set gradually and end to end a plurality of shell fragments, and is adjacent be formed with between the shell fragment and warp the interval, the shell fragment includes the elastic arm and is located the fixed part at elastic arm both ends, it is adjacent the shell fragment symmetry sets up and passes through respective one the fixed part is connected, and is adjacent the respective another of shell fragment the fixed part is followed the first direction sets up relatively and with adjacent the elastic arm encloses establishes the formation warp the interval.

In some embodiments of the elastic member, the fixing portions are plate-shaped, the first direction is perpendicular to a plane where the fixing portions are located, and the fixing portions located at two ends of the same elastic arm are staggered along the first direction.

In some embodiments of the elastic member, the elastic arm includes a body portion and a bending portion bending from the body portion to the fixing portion, the bending portion connects the body portion and the fixing portion, and the body portion is plate-shaped.

In some embodiments of the elastic member, the number of the elastic pieces is more than three.

In some embodiments of the elastic member, the two fixing portions connected to each other are connected by a welding point.

In order to solve the above problem, the second technical scheme of the utility model is as follows:

a vibration motor comprises a shell with a containing space, a vibrator assembly suspended in the containing space through an elastic piece and a stator assembly fixedly connected with the shell, wherein the vibrator assembly can vibrate in a reciprocating mode along a first direction, the elastic piece can provide restoring force for the vibrator assembly, and the fixing portions at two ends of the elastic piece along the first direction are respectively connected with the shell and the vibrator assembly.

In some embodiments of the vibration motor, two stopper members are further accommodated in the accommodating space, the two stopper members are oppositely arranged along the first direction and correspond to two ends of the vibrator assembly one by one, the stopper members include two stopper members which are oppositely arranged along a second direction and located at two sides of the elastic arm, the second direction is perpendicular to the first direction, and an avoiding groove for avoiding the stopper member is formed in the elastic arm.

In some embodiments of the vibration motor, the number of the elastic members is two, and the two elastic members are oppositely disposed at both ends of the vibrator assembly along the first direction.

In some embodiments of the vibration motor, the vibrator component includes a mass block, four magnetic steels and two magnetic bowls, the mass block is provided with through holes for accommodating the stator component, the number of the magnetic steels is four, and includes two first magnetic steels arranged oppositely along the first direction and two second magnetic steels arranged oppositely along the third direction, the first magnetic steels and the second magnetic steels are all accommodated in the through holes and annularly arranged on the stator component, the third direction is perpendicular to the first direction, the number of the magnetic bowls is two, and each of the magnetic bowls is arranged in a one-to-one correspondence manner on one side of the second magnetic steels far away from the stator component and fixes the second magnetic steels on the mass block.

In some embodiments of the vibration motor, the stator assembly includes a drive coil wound on a bobbin and fixed to the housing through the bobbin, and a circuit board for supplying power to the drive coil.

The beneficial effects of the utility model reside in that:

the elastic part is applied to the vibration motor, so that the second-order vibration mode of the vibration motor is far away from the first-order vibration mode, and the swinging risk of the vibration motor is reduced; meanwhile, in the vibration process of the vibrator assembly in the vibration motor, particularly when the vibrator assembly reaches the maximum stroke position of vibration, the stress on the elastic piece is low, and the fatigue life reliability is good. Specifically, the elastic piece comprises a plurality of elastic pieces which are sequentially arranged along a first direction and are connected end to end, a deformation area is formed between every two adjacent elastic pieces, and the size of the deformation area is changed by the approach and the distance of the elastic pieces, so that restoring force is provided for the vibrator component; this shell fragment includes the elastic arm and is located the fixed part at elastic arm both ends, and adjacent shell fragment symmetry sets up and connects through respective fixed part to make the hookup location between the adjacent shell fragment even as an organic whole through the fixed part, avoid forming that the shared space that has the fillet of bigger size and bring is great, shaping stress and the great problem of the shaping degree of difficulty.

[ description of the drawings ]

Fig. 1 is a schematic view of an explosion structure of a vibration motor according to the present invention;

fig. 2 is an axial view of a vibration motor according to the present invention;

FIG. 3 is a top view of the vibration motor of FIG. 2 with the upper cover removed;

fig. 4 is an axial view of an elastic member in the vibration motor shown in fig. 2;

FIG. 5 is a schematic view of the elastic member shown in FIG. 4 in an exploded configuration;

fig. 6 is a front view of the elastic piece of the elastic member shown in fig. 4.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

Referring to fig. 1 to 6, a vibration motor 10 according to the present invention will now be described. The vibration motor 10 includes a housing 100, an elastic member 200, a vibrator assembly 300, a stator assembly 400, and a circuit board 500. The housing 100 has a receiving space 101. Specifically, as shown in fig. 1 to 3, the housing 100 includes an upper cover 110 and a lower cover 120 that are disposed opposite to each other, and a circumferential sidewall 130 between the upper cover 110 and the lower cover 120. The upper cover 110, the lower cover 120 and the circumferential side wall 130 enclose a receiving space 101. The upper cover 110 and the circumferential sidewall 130 may be integrally connected by bonding or ultrasonic welding. Similarly, the circumferential sidewall 130 and the lower cover 120 may be connected together by clamping, bonding, or ultrasonic welding. In this embodiment, the circumferential side wall 130 includes two L-shaped plates connected end to end. The two L-shaped plates can be connected into a whole by clamping, bonding or ultrasonic welding and the like.

As shown in fig. 3, further, the vibrator assembly 300 is suspended in the receiving space 101 by the elastic member 200 and can reciprocally vibrate in the first direction. The elastic member 200 can provide restoring force to the vibrator assembly 300. The number of the elastic members 200 is two, and the two elastic members 200 are oppositely disposed at both ends of the vibrator assembly 300 in the first direction. Referring to fig. 1, 3 to 6, the elastic member 200 includes a plurality of elastic pieces 210 sequentially arranged along a first direction and connected end to end, a deformation zone S is formed between adjacent elastic pieces 210, and the size of the deformation zone S is changed by approaching and departing the elastic pieces 210, so as to provide a restoring force for the vibrator assembly 300. Specifically, the elastic sheet 210 includes an elastic arm 211 and fixing portions 212 located at two ends of the elastic arm 211, and adjacent elastic sheets 210 are symmetrically disposed and connected by one fixing portion 212. Therefore, the connecting positions between the adjacent elastic sheets 210 are connected into a whole through the fixing part 212, and the problems of large occupied space and large forming stress and difficulty caused by the formation of a large-size round corner are avoided. The other fixing portion 212 of each adjacent spring 210 is disposed opposite to the adjacent spring arm 211 along the first direction to form a deformation zone S. The fixing portions 212 at both ends of the elastic member 200 in the first direction are connected to the case 100 and the vibrator assembly 300, respectively. The elastic member 200 is applied to the vibration motor 10, so that the second-order vibration mode of the vibration motor 10 is far away from the first-order vibration mode, thereby reducing the swing risk of the vibration motor 10; meanwhile, during the vibration of the vibrator assembly 300 in the vibration motor 10, especially when the vibrator assembly 300 reaches the maximum stroke position of vibration, the elastic member 200 is subjected to a lower stress, and the fatigue life reliability is better. In this embodiment, the first direction is parallel to the direction indicated by the arrow X in fig. 2 and 3, the second direction is parallel to the direction indicated by the arrow Y in fig. 2, and the third direction is parallel to the direction indicated by the arrow Z in fig. 2 and 3.

Referring to fig. 1, 3 to 6, in an embodiment, the fixing portions 212 are plate-shaped, and the first direction is perpendicular to the plane of the fixing portions 212, so that the two fixing portions 212 connected to each other can be attached to each other, and the connection stability between the adjacent elastic sheets 210 is ensured during the deformation of the elastic member 200. The fixing portions 212 at two ends of the same elastic arm 211 are arranged in a staggered manner along the first direction, so that the deformation range S has a large deformable range, and meanwhile, the adjacent elastic arms 211 do not interfere with each other along with the deformation of the elastic piece 200, so that the elastic piece 200 is ensured to provide the restoring force of the vibrator assembly 300, and the vibration stability of the vibrator assembly 300 is further ensured.

In one embodiment, the resilient arm 211 includes a body portion 2111 and a bent portion 2112 bent from the body portion 2111 toward the fixing portion 212, the bent portion 2112 connecting the body portion 2111 with the fixing portion 212 to compensate for deflection from the body portion 2111 toward the fixing portion 212. During vibration of the vibrator assembly 300, the body portion 2111 can rotate relative to the fixing portion 212 through the bent portion 2112, and therefore, the bent portion 2112 can also provide a restoring force for restoring the body portion 2111, so that the elastic member 200 can provide the restoring force for the vibrator assembly 300. Further, the body portion 2111 has a plate shape. Thus, a certain deformation range of the deformation interval S is ensured, so that the adjacent body portion 2111 is not contacted before the elastic element 200 reaches the limit compression state, that is, the adjacent body portion 2111 is in the fit state, and the compression deformation of the elastic element 200 is not affected. In this embodiment, the number of the elastic sheets 210 is three, and the two fixing portions 212 connected to each other are connected by the welding point 213. It is understood that in other embodiments, the number of the resilient pieces 210 may also be two or more than three. The two fixing portions 212 connected to each other may be connected to each other by clamping, bonding, or ultrasonic welding.

As shown in fig. 1 and fig. 3, in addition to the above embodiment, two blocking member assemblies are further accommodated in the accommodating space 101, the two blocking member assemblies are oppositely disposed along a first direction and are one-to-one corresponding to two ends of the vibrator assembly 300, the blocking member assemblies include two blocking members 600 oppositely disposed along a second direction and located at two sides of the elastic arm 211, the second direction is perpendicular to the first direction, and the elastic arm 211 is provided with a avoiding groove 214 for avoiding the blocking member 600. Specifically, two stoppers 600 in the same stopper assembly are fixedly connected to the upper cover 110 and the lower cover 120, respectively. During the vibration process, the stopper 600 can block the vibrator assembly 300, thereby effectively preventing the performance degradation caused by the excessive deformation of the elastic member 200.

In one embodiment, the vibrator assembly 300 includes a mass block 310, four magnetic steels 320 and two magnetic bowls 330, the mass block 310 is provided with a through hole 311 for accommodating the stator assembly 400, the number of the magnetic steels 320 is four, the two magnetic steels include two first magnetic steels 321 oppositely disposed along a first direction and two second magnetic steels 322 oppositely disposed along a third direction, the first magnetic steels 321 and the second magnetic steels 322 are both accommodated in the through hole 311 and annularly disposed on the stator assembly 400, the third direction is perpendicular to the first direction, the number of the magnetic bowls 330 is two, and each magnetic bowl 330 is disposed on one side of each second magnetic steel 322 far from the stator assembly 400 in a one-to-one correspondence manner and fixes the second magnetic steels 322 on the mass block 310. The fixing portions 212 at two ends of the elastic element 200 along the first direction are respectively connected with the circumferential side wall 130 and the mass block 310, the fixing portions 212 arranged on the circumferential side wall 130 are respectively provided with a baffle 700 at one side far away from the circumferential side wall 130 and the fixing portions 212 arranged on the mass block 310 are respectively provided with a baffle 700 at one side far away from the mass block 310, and the baffle 700 can buffer the impact force generated when the elastic element 200 is compressed by the fixing portions 212 arranged oppositely.

In one embodiment, stator assembly 400 includes a drive coil 410 and a bobbin 420, with drive coil 410 being wound around bobbin 420 and secured to housing 100 by bobbin 420. In this embodiment, the circuit board 500 enables the drive coil 410 to generate a magnetic field by supplying electrical power to the drive coil 410. Specifically, the circuit board 500 is attached to one side of the lower cover 120 close to the circumferential sidewall 130, and one end of the circuit board passes through the circumferential sidewall 130 and is electrically connected to the driving coil 410, so that the driving coil 410 is electrified and generates a magnetic field. The magnetic field generated by the driving coil 410 interacts with the magnetic field generated by the magnetic steel, thereby driving the vibrator assembly 300 to vibrate reciprocally in the vibration direction within the receiving space 101.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. The elastic piece is characterized by comprising a plurality of elastic pieces which are sequentially arranged along a first direction and are connected end to end, wherein the elastic pieces are adjacent to each other, a deformation interval is formed between the elastic pieces, each elastic piece comprises an elastic arm and fixing parts located at two ends of the elastic arm, the elastic pieces are symmetrically arranged and are connected through one of the fixing parts, the elastic pieces are adjacent to each other, the fixing parts are arranged along the opposite direction of the first direction and are adjacent to the elastic arm, and the deformation interval is formed by surrounding the elastic arms.

2. The spring according to claim 1, wherein the fixing portions are plate-shaped, the first direction is perpendicular to a plane of the fixing portions, and the fixing portions at two ends of the same spring arm are staggered along the first direction.

3. The spring according to claim 2, wherein the spring arm includes a body portion and a bent portion bent from the body portion toward the fixing portion, the bent portion connecting the body portion and the fixing portion, the body portion having a plate shape.

4. The elastic member according to claim 3, wherein the number of the resilient pieces is three or more.

5. Spring according to claim 4, characterized in that the two fastening parts connected to each other are connected by a weld.

6. A vibration motor comprising a housing having a receiving space, a vibrator assembly suspended in the receiving space by an elastic member according to any one of claims 1 to 5, and a stator assembly fixedly connected to the housing, wherein the vibrator assembly is capable of reciprocating vibration in the first direction, the elastic member is capable of providing a restoring force to the vibrator assembly, and the fixing portions at both ends of the elastic member in the first direction are respectively connected to the housing and the vibrator assembly.

7. The vibration motor according to claim 6, wherein two stopper members are further accommodated in the accommodating space, the two stopper members are oppositely disposed along the first direction and correspond to two ends of the vibrator assembly one by one, the stopper members include two stopper members which are oppositely disposed along a second direction and located at two sides of the elastic arm, the second direction is perpendicular to the first direction, and an avoiding groove for avoiding the stopper member is formed on the elastic arm.

8. The vibration motor of claim 7, wherein the number of the elastic members is two, and the two elastic members are oppositely disposed at both ends of the vibrator assembly in the first direction.

9. The vibration motor according to claim 8, wherein the vibrator assembly includes a mass block, four magnetic steels and two magnetic bowls, the mass block has a through hole for accommodating the stator assembly, the number of the magnetic steels is four, the four magnetic steels include two first magnetic steels oppositely disposed along the first direction and two second magnetic steels oppositely disposed along a third direction, the first magnetic steel and the second magnetic steel are accommodated in the through hole and annularly disposed on the stator assembly, the third direction is perpendicular to the first direction, the number of the magnetic bowls is two, and each of the magnetic bowls is correspondingly disposed on one side of each of the second magnetic steels far away from the stator assembly and fixes the second magnetic steel on the mass block.

10. A vibration motor as claimed in claim 9, wherein said stator assembly includes a driving coil and a bobbin, said driving coil being wound around said bobbin and fixed to said housing through said bobbin, said vibration motor further comprising a circuit board for supplying power to said driving coil.