SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention is to provide a linear vibration motor to solve the problems of the prior art that the conventional motor can only generate vibration in one direction, the application range is small, and the vibration sense is weak.
The utility model provides a linear vibration motor, including the shell, accommodate the vibration system in the shell, correspond the stator that sets up with the vibration system, the vibration system includes first oscillator and the second oscillator of linear vibration motor X axle direction vibration along the line to and set up between first oscillator and second oscillator and the third oscillator of the Y axle direction vibration of linear vibration motor along the line; the third vibrator is movably connected with the first vibrator, the second vibrator and the shell respectively.
In addition, the first vibrator preferably comprises a first mass block and a first magnet embedded in the first mass block, the second vibrator comprises a second mass block and a second magnet embedded in the second mass block, and the third vibrator comprises two third mass blocks; the two third mass blocks are distributed along the Y-axis direction of the linear vibration motor, and the opposite surfaces of the two third mass blocks are respectively and elastically connected with the first mass block through a first elastic sheet and the second mass block through a second elastic sheet; the opposite surfaces of the two third mass blocks are respectively movably connected with the shell through a guide piece.
In addition, the preferred scheme is that the first elastic sheet comprises a first fixing part and two first free ends integrated with the first fixing part, and a first elastic sheet clamping groove matched with the first fixing part is arranged on the first mass block; the first fixing part is clamped in the first elastic sheet clamping groove, and the two first free ends are respectively welded and fixed with the opposite surfaces of the two third mass blocks.
In addition, the preferred scheme is that the second elastic sheet comprises a second fixing part and two second free ends integrally structured with the second fixing part, and a second elastic sheet clamping groove matched with the second fixing part is arranged on the second mass block; the second fixing part is clamped in the second elastic sheet clamping groove, and the two second free ends are respectively welded and fixed with the opposite surfaces of the two third mass blocks.
In addition, the first vibrator preferably comprises a first mass block and a first magnet embedded in the first mass block, the second vibrator comprises a second mass block and a second magnet embedded in the second mass block, and the third vibrator comprises a third mass block; the third mass block is transversely positioned between the first mass block and the second mass block, and two ends of the third mass block are respectively and elastically connected with the first mass block and the second mass block through elastic connecting pieces; and two sides of the third mass block are respectively movably connected with the shell through the guide pieces.
In addition, preferably, the guide part is a cuboid structure fixed on the side wall of the shell, and a guide hole/guide column is arranged on one side of the guide part close to the third oscillator; and the third mass block is provided with a guide post/guide hole corresponding to the guide hole, and the guide post is inserted into the guide hole.
In addition, the preferable scheme is that a limiting block, a guide shaft and a limiting spring are respectively arranged between the first mass block, the second mass block and the shell, and the limiting spring is sleeved on the guide shaft and is limited among the first mass block, the second mass block and the limiting block; and a limiting hole for the guide shaft to reciprocate is arranged in the limiting block.
In addition, the preferable scheme is that the limit block is provided with cushion pads which are symmetrically distributed on one side close to the first mass block or the second mass block.
In addition, it is preferable that the housing includes an upper housing and a lower housing which are fittingly connected, and an electrical connection plate is provided on the lower housing.
In addition, it is preferable that the stator includes a stator coil and a core located inside the stator coil; the stator coil is conducted with the electric connection plate.
According to the above technical scheme, the utility model discloses a linear vibration motor sets up the third oscillator between the first oscillator and the second oscillator of quality difference, can also produce the vibration in Y axle direction when linear vibration motor's X axle direction produces the vibration, and the vibration in two directions can superpose, and the sense of vibration reinforcing, and application scope is wide.
Detailed Description
The utility model discloses used "quality piece" can also be called "balancing weight" when expression concrete implementation mode, all indicate with the permanent magnet that produces the vibration fixed high quality, the high density metal block in order to strengthen the vibration balance to increase the vibrational force, make the vibration of electronic product stronger.
For the purpose of describing the linear vibration motor of the present invention in detail, specific embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 and 2 show an exploded structure and a sectional structure of a linear vibration motor according to an embodiment of the present invention, respectively.
As shown in fig. 1 and fig. 2, the linear vibration motor according to the embodiment of the present invention includes a housing, a vibration system accommodated in the housing, and a stator disposed corresponding to the vibration system, wherein the vibration system includes a first vibrator and a second vibrator vibrating along an X-axis direction of the linear vibration motor, and a third vibrator disposed between the first vibrator and the second vibrator and vibrating along a Y-axis direction of the linear vibration motor; the first vibrator and the second vibrator are different in weight, and the third vibrator is movably connected with the first vibrator, the second vibrator and the shell respectively, so that when the first vibrator and the second vibrator vibrate along the X axis of the linear vibration motor, the third vibrator is driven to vibrate in the Y axis direction.
Specifically, the first vibrator comprises a first mass block 9 and a first magnet 4 embedded in the first mass block 9, the second vibrator comprises a second mass block 9 'and a second magnet 4' embedded in the second mass block 9 ', and the third vibrator comprises two third mass blocks 3 and 3'; the first mass block 9 and the second mass block 9 'are respectively arranged on the X-axis direction of the linear vibration motor and are positioned at two ends of the X-axis direction of the shell, the two third mass blocks 3 and 3' are distributed along the Y-axis direction of the linear vibration motor, opposite surfaces of the two third mass blocks 3 and 3 'are respectively elastically connected with the first mass block 9 through the first elastic sheet 2 and are elastically connected with the second mass block 9' through the second elastic sheet 2 ', and opposite surfaces of the two third mass blocks 3 and 3' are respectively movably connected with the shell through the guide piece.
The first elastic sheet 2 comprises a first fixing part and two first free ends integrated with the first fixing part, and the first mass block 9 is provided with an accommodating groove 91 corresponding to the first magnet 4 and a first elastic sheet clamping groove 92 matched with the first fixing part; the first fixing portion is clamped in the first spring plate clamping groove 92, and the two first free ends are respectively welded and fixed with the opposite surfaces of the two third mass blocks 3 and 3'. The second elastic sheet 2 ' comprises a second fixing part 12 ' and two second free ends integrally structured with the second fixing part 12 ', and a second elastic sheet clamping groove matched with the second fixing part 12 ' is arranged on the second mass block 9 '; the second fixing portion 12 'is clamped in the second spring plate clamping groove, and the two second free ends are respectively welded and fixed with the opposite surfaces of the two third mass blocks 3 and 3'.
In other words, the fixing portion of the first elastic sheet 2 is clamped in the first elastic sheet clamping groove 92 of the first mass block 9, two free ends of the first elastic sheet 2 are respectively welded and fixed with the side walls of the opposite surfaces of the two third mass blocks 3 and 3 ', the fixing portion of the second elastic sheet 2 ' is clamped in the second clamping groove of the second mass block 9 ', and two free ends of the second elastic sheet 2 ' are also respectively welded and fixed with the side walls of the opposite surfaces of the two third mass blocks 3 and 3 '; the first elastic sheet 2 and the second elastic sheet 2 ' form an annular structure, and in the vibration process of the first mass block 9 and the second mass block 9 ', the resonance of the first vibrator and the second vibrator can be transmitted to the two third mass blocks through the first elastic sheet 2 and the second elastic sheet 2 '.
The guide piece is of a cuboid structure fixed on the side wall of the shell, one side, close to the third oscillator, of the guide piece is provided with a guide hole/guide post, the third mass block is provided with a guide post/guide hole corresponding to the guide hole, the guide post is inserted into the guide hole, and in the vibration process of the third mass block, the motion of the third mass block can be guided through the matching of the guide hole and the guide post.
As shown in the attached drawings, the third mass block includes a third mass block 3 and a third mass block 3 ', a first guide member 1 and a second guide member 1 ' are respectively arranged between the third mass block 3 and the third mass block 3 ' and the housing, a guide hole 11 ' is arranged on the second guide member 1 ', a guide post 13 ' corresponding to the guide hole 11 ' is arranged on the third mass block 3 ', and in the assembly process of the linear vibration motor, one side of the third mass block 3 is connected with the first mass block 9 and the second mass block 9 ' through a first elastic sheet 2 and a second elastic sheet 2 ', and the other side is limited in the guide hole 11 ' through the guide post to move. In order to prevent the guide post from falling out of the guide hole 11 ', when the masses (including the first mass, the second mass and the third mass) are at rest, the distance between the third mass 3 ' and the first guide member 1 is smaller than the depth of the guide post inserted into the guide hole 11 '.
Similarly, the position relationship between the third mass block 3 ' and the second guiding element 1 ' corresponds to the position relationship between the third mass block 3 ' and the first guiding element 1, and the same points can refer to the above description, and are not repeated herein.
In a specific embodiment of the present invention, a stopper, a guide shaft and a limiting spring are respectively disposed between the first mass block, the second mass block and the housing, and the limiting spring is sleeved on the guide shaft and is limited between the first mass block, the second mass block and the stopper; and a limiting hole for the guide shaft to reciprocate is arranged in the limiting block.
Specifically, the first limiting block 7 is disposed at the leftmost end of the housing (the left-right direction is shown in the attached drawing), a guide shaft 5 and a limiting spring 6 sleeved outside the guide shaft 5 are disposed between the first mass block 9 and the first limiting block 7, a limiting hole 71 is disposed on one side of the first limiting block 7 close to the first mass block 9, a corresponding shaft hole is disposed on the first mass block 9 at a position corresponding to the limiting hole 71, one end of the guide shaft 5 is fixed in the shaft hole, and the other end of the guide shaft moves in the limiting hole 71 in a limiting manner.
The second limiting block 7 'is arranged at the rightmost end of the shell, a guide shaft 5 and a limiting spring 6 sleeved outside the guide shaft 5 are also arranged between the second mass block 9' and the second limiting block 7 ', a limiting hole is formed in one side, close to the second mass block 9', of the second limiting block 7 ', a corresponding shaft hole is formed in the position, corresponding to the limiting hole, of the second mass block 9', one end of the guide shaft is fixed in the shaft hole, and the other end of the guide shaft moves in the limiting hole in a limiting mode. During the movement of the first mass block 9 and the second mass block 9', the spring 6 sleeved on the guide shaft 5 provides elastic restoring force for the guide shaft.
For preventing the first quality piece 9 and first stopper 7, second quality piece 9 'and second stopper 7' between bump the utility model discloses an in another embodiment, be provided with the blotter 8 of symmetric distribution in the stopper (including first stopper and second stopper) one side that is close to first quality piece or second quality piece, cushion between first quality piece and second quality piece and the stopper that corresponds through blotter 8. Wherein, the cushion pad can be a rubber pad or a silica gel pad and the like.
It should be noted that, in another embodiment of the present invention, the third mass block may also be provided as one block, in this case, the first vibrator includes the first mass block and the first magnet embedded inside the first mass block, the second vibrator includes the second mass block and the second magnet embedded inside the second mass block, and the third vibrator includes a third mass block; the third mass block is transversely positioned between the first mass block and the second mass block, and two ends of the third mass block are respectively and elastically connected with the first mass block and the second mass block through elastic connecting pieces; and two sides of the third mass block are respectively movably connected with the shell through the guide pieces.
The first mass block, the second mass block and the third mass block are distributed along the X-axis direction of the linear vibration motor, two ends of the third mass block are elastically connected with the first mass block and the second mass block through elastic connecting pieces (such as springs or elastic sheets) and two sides of the third mass block are movably connected with the shell through guide pieces. Due to the fact that the first mass block and the second mass block are different in weight, the third mass block can vibrate in the Y-axis direction of the linear vibration motor in the moving process of the first mass block and the second mass block, two resonance systems are formed, and therefore vibration of the linear vibration motor in two directions is achieved.
In another embodiment of the present invention, the housing includes an upper housing (not shown in the figure) and a lower housing 11 that are connected in an adaptive manner, an electrical connection plate 12 is disposed on the lower housing 11, and the stator includes a stator coil 10 and an iron core (not shown in the figure, the iron core can be omitted) located inside the stator coil 10; the stator coil 10 is electrically connected to the electrical connection plate 12. The first magnet 4 located in the first mass 9 and the second magnet 4 'located in the second mass 9' interact with the stator coil 10 to provide the driving force for the vibrator vibration.
According to the above embodiment, the utility model provides a linear vibration motor, first quality piece and the magnet that corresponds form a vibrator system, second quality piece and the magnet that corresponds form second vibrator system, two vibrator system weight are different, and form two resonance systems jointly, provide the drive power of oscillator through magnet and stator coil interact, the oscillator drives first quality piece and second quality piece at linear vibration motor's X axial vibration at the vibration in-process, and drive the Y axle direction vibration at linear vibration motor of third quality piece that is located between first quality piece and the second quality piece, enlarge linear vibration motor's application scope, and the vibration in two directions can superpose, strengthen linear vibration motor's the sense of shaking.
The linear vibration motor according to the present invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the linear vibration motor of the present invention without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.