TW202118200A - Shaftless linear resonant actuator - Google Patents

Abstract

A non-axis linear resonant actuator includes a magnet element, a pair of counter weights, a pair of springs and a housing. The magnet element is sandwiched between the pair of counter weights, and the counter weight is further clamped between the pair of springs. The magnet element, the counterweight, and the pair of springs are arranged in the housing, the magnet element and the pair of counterweights are not provided with a central axis in the axial direction, but are fixed together by adhesive bonding. The non-axis linear vibration motor of the invention has simple structure, convenient assembly and low manufacturing cost.

Description

Non-axis linear vibration motor

The invention relates to a linear vibration motor, in particular to a non-axis linear vibration motor with simple structure and stable and reliable operation.

A linear vibration motor as shown in US Published Patent Application No. US20130169071A is widely used in cellular phones. However, its structure is complicated and its assembly is complicated.

Therefore, it is necessary to provide a non-axial linear vibration motor that has a simple structure and can be easily assembled, so as to overcome the above-mentioned drawbacks.

The technical problem to be solved by the present invention is to provide a non-axis linear vibration motor with simple structure and stable and reliable operation characteristics.

In order to solve the above-mentioned problems, the present invention can adopt the following technical solutions: a non-axial linear vibration motor, the linear vibration motor includes a metal shell with a containing space, a magnet element arranged in the containing space, a pair of axially The magnet element is sandwiched between the counterweights, a pair of springs sandwiching the pair of counterweights and the magnet element in the axial direction, and the housing is provided with corresponding springs The first holding device held by the outer end, the counterweight is provided with a second holding device for holding the corresponding inner end of the spring, and the magnet element and the counterweight are fixed by adhesive bonding. There is no central axis extending longitudinally.

Further, the mating surface of the counterweight and the magnet assembly is recessed to form a blind hole, and the blind hole is used to accommodate the glue as much as possible.

Further, the first holding device on the metal shell includes a pair of protrusions punched out from the metal shell.

Further, a pair of the protruding pieces are formed by tearing inwardly from the end wall of the metal shell and forming an opening at the tearing point, and the non-axial linear vibration motor further includes a pair of protruding pieces attached to the end wall to cover the The cover of the opening.

Further, a pair of the protruding pieces are arranged at intervals in a transverse direction perpendicular to the axial direction.

Further, a pair of the springs have a rectangular cross section.

Further, the spring has a rectangular cross-section, and the second holding device is a rectangular protrusion formed at the other end of the fitting block relative to the fitting surface.

Further, the metal shell includes an upper cover with a pair of long walls and a lower cover with a pair of the end walls.

Further, the non-axial linear vibration motor further includes a coil element having a coil held in the accommodation space of the metal casing and a flexible cable extending out of the metal casing.

Further, the magnet assembly includes at least a pair of magnets and a yoke sandwiched between adjacent magnets in the axial direction, and the coil surrounds the magnet element and forms a gap with the magnet element.

Compared with the prior art, the magnet element and the pair of counterweights of the present invention are not provided with a central shaft in the axial direction, but are fixed together by adhesive bonding. The structure of the present invention is that there is no axis linear vibration motor. Simple, convenient to assemble, and low manufacturing cost.

Referring to the first to the ninth figures, the non-axial linear vibration motor 200 of the present invention includes a metal housing with an internal accommodation space, a magnet element 285 arranged in the accommodation space, a pair of counterweights 230, 232, A pair of springs 250, 252 and coil assembly 275. A pair of weights 230, 232 sandwich the magnet element 285 in the axial direction (that is, the longitudinal direction), and a pair of springs 250, 252 connect the pair of weights 230, 232 to the axis in the axial direction. The magnet element 285 is sandwiched between.

The metal housing includes a first housing 210 and a second housing 220 that are fixed together to form a containing space. The first housing 210 includes a horizontal plate-shaped upper cover 212 and a second housing extending from the upper cover. For the long wall 214, the second housing 220 includes a horizontal plate-shaped lower cover 222 and a pair of end walls 224 extending from the lower cover. Each of the end walls 224 is formed with a first holding device extending inwardly to hold the spring, and the first holding device is preferably a pair of protruding pieces 225 torn from the end wall 224 A pair of the protruding pieces 225 are arranged at intervals along a transverse direction perpendicular to the axial direction, and a pair of the protruding pieces 225 are used to hold the springs 250 and 252. A pair of the protruding pieces 225 forms an opening 223 from the torn part of the end wall 224, and a pair of thin plate-shaped covers 227 and 228 are respectively attached to the corresponding end wall 224 to cover the opening 223. It should be noted that the first holding device may also be a protrusion (not shown) that is formed to protrude inward from the end wall 224 and has no opening. The protrusion (not shown) is preferably rectangular.

The magnet element 285 includes at least a pair of magnets and a yoke sandwiched between the pair of magnets in the axial direction. In the present invention, the magnet assembly 285 includes a first magnet 240, a second magnet 242 and a yoke sandwiched between the pair of magnets in the axial direction. The yoke 260 between the first magnet 240 and the second magnet 242 is a soft magnetic material with high magnetic permeability and low coercivity compared with the first magnet 240 and the second magnet 242. The counterweight 230 is recessed to form a blind hole 231 on the mating surface for mating with the magnet assembly 285. At least two blind holes 231 are provided. The counterweight 232 is connected to the magnet assembly. Blind holes 233 are recessed on the mating surface of 285 mating. The blind holes 233 are also provided at least two. The blind holes on each weight block are rectangular holes, circular holes, or rectangular holes and circular holes. The combination.

The weights 230, 232 are provided with second holding devices for holding the springs 250, 252, respectively, and the second holding device is from the other end of the weights 230, 232 relative to the mating surface A protrusion 235 protruding in the axial direction. The protrusion 235 has a substantially rectangular structure. The springs 250 and 252 have rectangular cross-sections. In this way, the rectangular springs 250 and 252 can interact with the rectangular shape of the weights 230 and 232. Reliable limit between the protrusions 235. In general, one end of the spring 250 is restricted by the protrusion 235 of the counterweight 230, and the other end of the spring 250 is restricted by a pair of the protrusions 225 of the end wall 224, and one end of the spring 252 is restricted by the counterweight. The protrusion 235 of the 232 is restricted, and the other end of the spring 252 is restricted by a pair of the protrusions 225 of the other end wall 224. The coil element 275 includes a conductive coil 270 held in the accommodating space of the metal casing and a flexible cable 280 extending out of the metal casing. The flexible cable 280 is a flexible printed circuit. The conductive coil 270 surrounds the magnet element 285 and has a gap with the magnet element 285, and the flexible cable 280 extends out of the metal housing for power supply.

The counterweight 230 and the first magnet 240 are glued and fixed, the counterweight 232 and the second magnet 242 are glued and fixed, and the counterweight 230 is connected to the counterweight. The blind holes 233 of 232 can contain the glue as much as possible, so that the adhesion between the counterweights 230 and 232 and the first and second magnets 240 and 242 is reliable. In addition, the interface between the first and second magnets 240, 242 of the magnet element 285 and the yoke 260 can also be provided with the blind holes as required, which has achieved the purpose of accommodating more glue to keep each other securely fixed. .

Compared with the prior art, since the central axis (not shown) is not provided to extend through the corresponding magnet assembly 285 and the counterweights 230, 232, the magnet element 285 and the counterweights are simplified without considering the precise size of the holes therein. Manufacture of heavy blocks 230 and 232. In the present invention, the magnet assembly is not provided with a hole, and although the counterweight is provided with a blind hole, it is not necessary to ensure the high precision of the hole.

It can be understood that when the coil element 275 is operated, the magnet assembly 285 together with the pair of weights 230 and 232 will oscillate between the pair of springs 250 and 252 in the axial direction, thereby generating tactile vibration. It is worth noting that because the present invention does not have a central axis (not shown), the combination of the magnet element 285 and the pair of weights 230 and 232 further generates tactile vibration in the vertical direction.

It should be pointed out that the above descriptions are only the best embodiments of the present invention, and not all of the embodiments. Any equivalent changes made to the technical solutions of the present invention by those of ordinary skill in the art by reading the specification of the present invention shall be the present invention. Covered by the request.

200: Non-axis linear vibration motor 285: Magnet element 240: first magnet 242: second magnet 260: Yoke 230/232: counterweight 231/233: blind hole 235: Protrusion 225: Tab 250/252: Spring 275: Linear component 270: Conductive coil 280: Flexible cable 210: first shell 212: upper cover 214: Long Wall 220: second shell 222: lower cover 224: End Wall 225: Tab 223: open 227/228: cover

The first figure is a perspective view of the non-axial linear vibration motor of the present invention. The second figure is a perspective view of the first figure from another perspective. The third figure is an exploded view of the non-axial linear vibration motor in the first figure. The fourth figure is another exploded view of the non-axial linear vibration motor in the first figure. Figure 5 is an exploded view of Figure 4 from another perspective. The sixth figure is another exploded view of the non-axial linear vibration motor in the first figure. Figure 7 is an exploded view of Figure 6 from another perspective. The eighth figure is the cross-sectional view of the first figure along the line VIII-VIII. The ninth figure is a cross-sectional view of the first figure along the line IX-IX.

no

200: Non-axis linear vibration motor

225: Tab

230/232: counterweight

231/233: blind hole

235: Protrusion

240: first magnet

242: second magnet

250/252: Spring

260: Yoke

270: Conductive coil

280: Flexible cable

Claims (10)

A non-axis linear vibration motor, characterized in that: the linear vibration motor comprises a metal shell with a containing space, a magnet element arranged in the containing space, and a pair of magnet elements sandwiched between the magnet elements in the axial direction. A counterweight, a pair of springs sandwiching a pair of the counterweight and the magnet element in the axial direction, the housing is provided with a first holding device for holding the corresponding outer ends of the springs, The counterweight is provided with a second holding device for holding the corresponding inner end of the spring, and the magnet element and the counterweight are glued and fixed without a central axis extending longitudinally. The non-axial linear vibration motor according to claim 1, wherein the mating surface of the counterweight and the magnet assembly is recessed to form a blind hole, and the blind hole is used to accommodate as much of the glue as possible . The non-axial linear vibration motor according to claim 1, wherein the first holding device on the metal casing includes a pair of protruding pieces torn from the metal casing. The non-axial linear vibration motor according to claim 3, wherein a pair of the protruding pieces are formed by tearing inwardly from the end wall of the metal shell and forming an opening at the tear, and the non-axial linear vibration motor is also It includes a cover attached to the end wall to cover the opening. The non-axial linear vibration motor according to claim 3, wherein a pair of the protruding pieces are arranged at intervals in a transverse direction perpendicular to the axial direction. The non-axial linear vibration motor according to claim 3, wherein the pair of springs have rectangular cross-sections. The non-axial linear vibration motor according to claim 2, wherein the spring has a rectangular cross section, and the second holding device is a rectangular protrusion formed on the other end of the fitting block with respect to the fitting surface. The non-axial linear vibration motor according to claim 1, wherein the metal housing includes an upper cover having a pair of long walls and a lower cover having a pair of the end walls. The non-axial linear vibration motor according to claim 1, wherein the non-axial linear vibration motor further includes a coil element having a coil held in the accommodating space of the metal housing and extending from the metal The flexible cable of the housing. The non-axial linear vibration motor according to claim 9, wherein the magnet element includes at least a pair of magnets and a yoke sandwiched between adjacent magnets in the axial direction, and the coil surrounds the magnet element and is connected to the magnet element. A gap is formed between the magnet elements.

Images