CN214800018U - Flexible line way board and stator module and linear vibration motor - Google Patents

Abstract

The utility model relates to the technical field of vibration motors, and discloses a flexible circuit board, which comprises an internal wiring end, an external wiring end extending outwards along one side of the internal wiring end, and a curve end connecting the internal wiring end and the external wiring end; the inner terminals are provided with first glue dispensing holes symmetrically along the width direction of the outer terminals near the curved ends. The beneficial effects are as follows: the stability of connection with the cover plate is achieved through the design of the flexible circuit board, and creep deformation caused by external force is reduced; the flexible printed circuit board has the advantages that the number, the shape and the positions of the holes in the flexible printed circuit board are designed, so that the fixing force between the flexible printed circuit board and the cover plate is increased, and the adverse risk caused by creep deformation of the flexible printed circuit board is reduced.

Description

Flexible line way board and stator module and linear vibration motor

Technical Field

The utility model relates to a vibrating motor technical field, in particular to flexible line way board and stator module and linear vibrating motor.

Background

The miniature vibration motor is a vibration feedback component applied to common electronic communication equipment such as mobile phones and flat panels. With the development of economy and the continuous updating of electronic communication equipment, the miniature vibration motor is also developed towards thinner thickness and smaller volume.

The flexible circuit board is a component which is arranged in the micro vibration motor and extends outwards to be connected with an external power supply. The miniature vibration motor has the advantages of high flexibility, small volume, light weight and the like, and is widely applied to the miniature vibration motor. In the prior art, the flexible printed circuit board is usually directly adhered to the motor base through a double-sided adhesive tape, and the flexible printed circuit board is provided with an external terminal for connecting an external power supply to the micro vibration motor. During the production and sale of the miniature vibration motor, the client often pulls the external terminal of the flexible circuit board during the motor performance detection and product assembly, so that the internal terminal is deviated, and the miniature vibration motor is poor due to the poor bonding of the flexible circuit board. Therefore, the connection of the flexible circuit board of the micro vibration motor in the prior art is not stable enough, and the connection strength needs to be improved.

SUMMERY OF THE UTILITY MODEL

For overcoming among the prior art miniature vibrating motor's flexible line way board joint strength low, connect the problem of insufficiently stable, the utility model provides a flexible line way board and stator module and linear vibrating motor. The specific technical scheme is as follows:

a flexible wiring board includes an internal terminal, an external terminal extending outward along one side of the internal terminal, and a curved end connecting the internal terminal and the external terminal; the inner terminals are provided with first glue dispensing holes symmetrically along the width direction of the outer terminals near the curved ends.

Furthermore, the number of the first dispensing holes is two, and the shape of the first dispensing hole is circular or square.

Further, the external terminal is provided with a first pad on a side away from the internal terminal; the internal terminals are symmetrically provided with second pads along the length direction of the internal terminals.

Further, the internal terminal is provided with at least one second dispensing hole between the second pads.

A stator assembly comprises a coil, a double-sided adhesive tape and a flexible circuit board; the double-sided adhesive is adhered to one side of the flexible circuit board, which is far away from the coil; the shape of the double-sided adhesive tape is matched with that of the internal terminal; and the double-sided adhesive tape is provided with a through hole communicated with the first dispensing hole at the position corresponding to the first dispensing hole.

Further, the coil is vertically arranged on the flexible circuit board, and the coil is adhered and fixed on the flexible circuit board through the second adhesive dispensing hole and is electrically connected with the flexible circuit board.

A linear vibration motor includes a housing, a vibrator assembly, a stator assembly; the stator assembly is adhered and fixed on the shell.

Furthermore, the vibrator component comprises a mass block which is provided with a through cavity, magnetic steel which is fixed in the cavity, a pole piece which faces the coil and is fixed at the bottom of the mass block, and elastic pieces which are arranged at two sides and two ends of the mass block and are respectively fixedly connected with the mass block and the shell.

Furthermore, the two ends of the mass block are provided with elastic piece connecting parts protruding out of the surface, and the bottom surface is provided with an installation part for installing the pole piece; the cavity comprises a first cavity, an elongated cavity and a second cavity which are communicated; the two ends of the first cavity and the second cavity are both provided with grooves.

Further, the linear vibration motor further comprises damping members, and the damping members are respectively arranged on the shell and the flexible circuit board.

The utility model has the advantages that: the stability of connection with the cover plate is achieved through the design of the flexible circuit board, and creep deformation caused by external force is reduced; the number, the shape and the positions of the holes on the flexible circuit board are designed, so that the fixing force between the flexible circuit board and the cover plate is increased, and the risk of poor insulation caused by deformation is reduced.

Drawings

Fig. 1 is an exploded view of a linear vibration motor according to the present invention.

Fig. 2 is a schematic structural diagram of a first embodiment of the flexible printed circuit of the present invention.

Fig. 3 is a schematic structural diagram of a second embodiment of the flexible printed circuit of the present invention.

Fig. 4 is a schematic structural diagram of the stator assembly of the present invention.

Fig. 5 is a schematic structural diagram of the vibrator assembly of the present invention.

Fig. 6 is a schematic structural diagram of the mass block of the present invention.

Wherein:

100-a flexible circuit board; 101-internal terminals; 102-external terminals; 103-curve end;

104-first dispensing hole; 105-a first pad; 106-second dispensing hole;

200-a coil;

300-a lower elastic member;

400-pole piece;

500-magnetic steel;

600-a mass block; 601-an elastic member connection portion; 602-a mounting portion; 603-a first cavity;

604-an elongated cavity; 605-a second cavity; 606-grooves;

700-upper elastic member;

800-a damping member;

801-upper housing; 802-cover plate;

900-double sided tape.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the prior art, the flexible circuit board generally comprises an internal terminal and an external terminal extending outwards from the internal terminal, and during performance detection and product assembly of the miniature vibration motor, the internal terminal of the flexible circuit board is often displaced due to the fact that the external terminal is pulled. For the joint strength who increases internal wiring end and miniature vibrating motor and the stability of being connected of internal wiring end and external wiring end, the utility model provides a flexible line way board and stator module and linear vibrating motor, its overall structure is shown in figure 1.

The flexible wiring board 100 of the first embodiment includes, as shown in fig. 2, an inner terminal 101, an outer terminal 102, a curved end 103, and a first dispensing hole 104, the inner terminal 101 being rectangular as a whole, and the outer terminal 102 extending from a long side of the inner terminal 101 and being disposed perpendicular to the inner terminal 101. Because the flexible printed circuit 100 is small in size and thin in thickness, the number and shape of the openings can affect the structural stability of the flexible printed circuit 100, and meanwhile, the position selection of the openings can affect the actual effect of the technical scheme. The utility model discloses in the trompil quantity of first dispensing hole 104 can directly influence the structural stability of flexible line way board 100, and the trompil is more, and the structure is unstable more, and trompil quantity is preferred two. The shape of the first dispensing hole 104 is preferably square, but may also be circular or other non-circular shapes. The curved end 103 is provided to reduce the stress concentration problem of the flexible printed circuit 100 due to abrupt change of shape. When the first dispensing hole 104 is disposed on the end 103 away from the curved line, the connection strength of the flexible wiring board 100 is not enhanced enough to effectively reduce the stress on the inner terminal 101. Therefore in the technical solution of the present invention, the first dispensing hole 104 is preferably a square dispensing hole, and the number is preferably two, and is arranged at the position where the inner terminal 101 is close to the curve end 103 and symmetrically arranged along the width direction of the outer terminal 102, and the first dispensing hole 104 is located at the edge position of the long side of the inner terminal 101.

Referring to fig. 3, the flexible printed circuit 100 of the second embodiment includes a rectangular internal terminal 101 attached to a cover 802 of the micro-vibration motor and conforming to the shape of the cover 802, an external terminal 102 extending outward along a side of the internal terminal 101 and extending out of the cover 802, and a curved end 103 connecting the internal terminal 101 and the external terminal 102. Unlike the first embodiment, in the second embodiment in which the outer terminal 102 is provided on the short side of the inner terminal 101 and extends in the longitudinal direction thereof, the influence of the pulling of the outer terminal 102 is greater, and it is more likely that the inner terminal 101 is deviated to cause the first pad 105 on the right side to contact the elastic member and cause insulation failure. Therefore, the utility model discloses a first dispensing hole 104 is set up to one side symmetry that interior terminal 101 is close to external connection terminal 102. When the micro vibration motor is connected, the inner terminal 101 is attached to the cover plate 802 by the double-sided adhesive tape 900, and the connection strength with the cover plate 802 is increased by dispensing at the first dispensing hole 104.

The flexible wiring board 100 of the second embodiment is shown in fig. 3, and includes an internal terminal 101, an external terminal 102, a curved end 103, and a first dispensing hole 104. Unlike the first embodiment, the external terminals 102 of the second embodiment are disposed in the width direction of the internal terminals 101. Since the flexible printed circuit 100 has a small volume and a small thickness, the position selection of the openings affects the practical effect of the technical solution, and the number and the shape of the openings affect the structural stability of the flexible printed circuit 100 itself, and the more the openings, the more the structure is unstable, therefore, the position of the first dispensing hole 104 is preferably set at the position adjacent to the curved end 103 and the number of the openings is preferably two. The curved end 103 is mainly provided to reduce the stress concentration problem of the flexible circuit board 100 caused by the abrupt change of the shape, and when the first dispensing hole is arranged far away from the curved end 103 at 104, the connection strength of the flexible circuit board 100 is not strong enough to effectively reduce the stress of the internal terminal 101. For easier processing, the first dispensing hole 104 may be a square, circular or other non-circular irregular hole. In the technical solution of the present invention, the first dispensing hole 104 is preferably a square dispensing hole, and is disposed at the inner terminal 101 near the curve end 103 and symmetrically disposed along the width direction of the outer terminal 102.

In fig. 2 and 3, the inner terminal 101 is provided with two first pads 105 for connecting the coil 200 in a length direction thereof, and three second dispensing holes 106 for fixing the coil 200 are provided between the first pads 105. The shape and number of the second dispensing holes 106 are specifically set according to the rule of the coil 200. The side of the external terminal 102 away from the internal terminal 101 is also provided with a second pad for connecting an external power supply, the second pad being used for electrical connection with an external power supply of a client.

A stator assembly, as shown in FIG. 4, comprises a flexible circuit board 100 and a coil 200, wherein the coil 200 is adhered and fixed on one side surface of the flexible circuit board 100 and is electrically connected with a first welding pad 105 of the flexible circuit board 100. Specifically, the coil 200 is dispensed and adhered at the second dispensing hole 106 of the flexible circuit board 100, and after mounting and fixing, leads led out of the coil 200 are respectively soldered to the first pads 105 disposed at both sides of the internal terminal 101. After the external terminal 101 is connected to an external power source, the coil 200 is energized to generate a magnetic field, and the magnetic field can be changed by the strength of the energized current and the change of the current direction.

As shown in fig. 1, the stator assembly further includes a double-sided tape 900, the double-sided tape 900 is used for adhering and connecting the flexible circuit board 100 and the cover plate 802, the double-sided tape 900 is adhered to the surface of the flexible circuit board 100 opposite to the surface where the coil 200 is disposed, and the shape of the double-sided tape 900 is adapted to the internal terminal 101. The double-sided adhesive tape 900 is provided with a through hole communicated with the first adhesive dispensing hole 104, and is arranged on the double-sided adhesive tape 900 at a position corresponding to the first adhesive dispensing hole 104 to reinforce the connection among the flexible circuit board 100, the double-sided adhesive tape 900 and the cover plate 802. The coil 200 is a flat structure with a central cavity, and is vertically adhered to the flexible circuit board 100 through a side surface thereof, and the other end thereof sequentially passes through the cavities of the lower elastic member 300, the pole piece 400, the mass 600 and the upper elastic member 700.

A linear vibration motor includes a housing, a stator assembly and a vibrator assembly, both of which are installed inside an accommodation space of the housing. The vibrator assembly structure is shown in fig. 5, and includes a lower elastic member 300, a pole piece 400, a magnetic steel 500, a mass block 600 and an upper elastic member 700, wherein a through cavity is arranged inside the mass block 600, the magnetic steel 500 is fixed inside the cavity, the pole piece 400 is fixed at the bottom of the mass block 600, a convergence surface of a magnetic induction line faces the coil 200, one end of the lower elastic member 300 is fixedly connected to the housing, the other end of the lower elastic member is fixedly connected to the lower surface of the mass block 600, one end of the upper elastic member 700 is fixedly connected to the housing, and the other end of the upper elastic member is fixedly connected to the upper surface of the mass block 600.

Specifically, as shown in fig. 6, the mass block 600 is a rectangular cylinder structure, the left and right sides of which are provided with elastic member connection portions 601 protruding from the surface of the middle portion, the bottom surface of the middle portion is provided with an installation portion 602 for installing the pole piece 400, and the middle portion is provided with a first cavity 603, an elongated cavity 604 and a second cavity 605 which are communicated with each other. The magnetic steel 500 is fixedly mounted on the inner wall surfaces of the first cavity 603 and the second cavity 605 by gluing, and the length of the long and narrow cavity 604 is larger than that of the first cavity 603 and the second cavity 605 for the coil 200 to pass through. When the coil 200 is arranged, the coil 200 penetrates through the mass block 600, the upper surface of the coil 200 protrudes out of the upper surface of the mass block 600, the two pieces of magnetic steel 500 inside the mass block 600 can generate a magnetic field, the coil 200 can generate the magnetic field when being electrified, and the change of the electrified current strength and the electrified current direction of the coil 200 can drive the change of the magnetic field, so that the vibrator assembly is driven to reciprocate in the arrangement direction of the elastic element. The lengths of the two magnetic steels 500 are equal, so that the vibrator assembly can keep uniform stress when reciprocating, and the coil 200 is ensured to drive the vibrator assembly to stably reciprocate. The corners of the inner walls of the first cavity 603 and the second cavity 605 are provided with grooves 606, and the grooves 606 can be used for accommodating more glue, so that the connection and fixation of the reinforcing magnetic steel 500 and the mass block 600 are realized.

The linear vibration motor is constructed as shown in fig. 1, and the housing includes an upper case 801 and a cover plate 802, the upper case 801 and the cover plate 802 are combined to form a receiving space, and the vibrator assembly and the stator assembly are mounted and fixed in the receiving space. One end of the lower elastic member 300 is fixedly connected to the upper surface of the cover plate 802, and the other end is fixedly connected to the lower surface of the mass 600; the upper elastic member 700 has one end fixedly connected to the inner surface of the upper housing 801 and the other end fixedly connected to the upper surface of the mass 600. The flexible wiring board 100 is integrally fixed to the cover plate 802 by a double-sided adhesive tape.

A damper 800 is further provided in the linear vibration motor, and the damper 800 is used to buffer the impact of the mass 600 on the upper housing 801 and the flexible wiring board 100. In an embodiment, as shown in fig. 1, since the upper and lower ends of the mass 600 are connected to elastic members, during the up-and-down reciprocating motion, one end of the upper elastic member 700 connected to the mass 600 may impact the upper housing, and one end of the lower elastic member 300 connected to the mass 600 may impact the flexible circuit board 100. Therefore, the damping member 800 has two upper and lower parts, which are respectively disposed at the corresponding positions of the upper housing 801 at the connection position of the upper elastic member 700 and the mass 600, and the connection position of the lower elastic member 300 and the mass 600 is at the corresponding position of the flexible circuit board 100. The thickness of the damping member 800 is adjusted according to actual requirements, so that the vibration stroke of the vibrator assembly can be effectively controlled. When the vibrator component reciprocates, the damping member 800 is compressed and deformed by the vibrator component, and the damping member 800 can buffer the impact of the vibrator component on the upper housing 801 or the flexible circuit board 100 when being compressed and deformed, thereby reducing the noise of the linear vibration motor, and the damping member 800 can be made of a material with good elasticity, such as buffer foam, a rubber pad, and the like.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A flexible wiring board comprising an internal terminal, an external terminal extending outward along one side of said internal terminal, and a curved end connecting said internal terminal and said external terminal; the inner terminals are provided with first glue dispensing holes symmetrically along the width direction of the outer terminals near the curved ends.

2. The flexible circuit board of claim 1, wherein the number of the first dispensing holes is two, and the shape of the first dispensing hole is circular or square.

3. The flexible wiring board of claim 1, wherein the external terminal is provided with a first pad on a side away from the internal terminal; the internal terminals are symmetrically provided with second pads along the length direction of the internal terminals.

4. The flexible wiring board of claim 3, wherein the internal terminals are provided with at least one second dispensing hole between the second pads.

5. A stator assembly comprising a coil, a double-sided tape, and further comprising the flexible wiring board of any one of claims 1-4; the double-sided adhesive is adhered to one side of the flexible circuit board, which is far away from the coil; the shape of the double-sided adhesive tape is matched with that of the internal terminal; and the double-sided adhesive tape is provided with a through hole communicated with the first dispensing hole at the position corresponding to the first dispensing hole.

6. The stator assembly of claim 5, wherein the coil is vertically disposed on a flexible circuit board, and the coil is adhered to the flexible circuit board through a second adhesive dispensing hole and electrically connected to the flexible circuit board.

7. A linear vibration motor comprising a housing, a vibrator assembly, and the stator assembly of claim 5 adhesively secured to said housing.

8. The linear vibration motor of claim 7, wherein the vibrator assembly comprises a mass block disposed through the cavity, a magnetic steel fixed inside the cavity, a pole piece fixed at the bottom of the mass block, and an elastic member disposed at both sides of the mass block and having both ends respectively fixedly connected to the mass block and the housing.

9. The linear vibration motor of claim 8, wherein both ends of the mass block are provided with elastic member connection portions protruding from a surface, and a bottom surface is provided with mounting portions for mounting the pole pieces; the cavity comprises a first cavity, an elongated cavity and a second cavity which are communicated; the two ends of the first cavity and the second cavity are both provided with grooves.

10. The linear vibration motor of claim 9, further comprising a damper provided to the housing and the flexible wiring board, respectively.

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