CN2836331Y

CN2836331Y - Rectilinear oscillation motor

Info

Publication number: CN2836331Y
Application number: CN 200520063105
Authority: CN
Inventors: 潘政民; 董乐平
Original assignee: SHENZHEN TAIRUIMEI PRECISION COMPONENTS CO Ltd
Current assignee: Shenzhen Meiou Electronics Co Ltd
Priority date: 2005-08-12
Filing date: 2005-08-12
Publication date: 2006-11-08
Anticipated expiration: 2015-08-12

Abstract

The utility model relates to a rectilinear oscillation motor which comprises an outer shell, a basal seat, coils, a spring plate, a magnet, a pole core, a magnetic bowl, etc., wherein the coils are fixed on the inner surface of the basal seat, a divided positive and negative electric conduction areas are respectively arranged on the inner surface and the outer surface of the basal seat, and two leading terminals of the coils are respectively and electrically connected with the positive and negative electric conduction areas which are arranged on the inner surface of the basal seat. In addition, the basal seat is made of plastics, a double face printed circuit board (PCB) or ceramics, and the electrode area on the outer surface of the basal seat can be connected with an outer circuit by a metal spring, a spring tab, or other similar modes or is designed into a foot basal seat with an adhesive sheet in order to lead the rectilinear oscillation motor to be assembled in a complete machine of the utility model by adopting an adhesive sheet machine. The utility model inherits the advantages of the constructional aspect of a rectilinear motor, components which are as smaller as being difficult to process, such as an electric brush, a commutator, etc., are saved, and the complete volume of the utility model can also be effectively reduced. In addition, the fabrication process flow can be simplified, and the utility model is suited for the bulk production and the further microminiaturization.

Description

Linear vibration motor

[technical field]

The utility model relates to a kind of small linear motor, relates in particular to a kind of small linear vibrating motor.

[background technology]

Apply to the vibrating motor of small-sized medical health apparatus such as the incoming call silent alert of mobile communication terminal such as mobile phone, beeper etc. and vibrator for massage, have that drag cup is cylindrical, iron core is cylindrical and platypelloid type is several, the core of these several series products is rotor and stator fields of a band eccentric hammer and coil, and is similar with traditional direct current machine formation.The production process of this class micro-vibration motor also still adopts the technology close with traditional direct current machine, and product miniaturization day by day makes its part dimension constantly dwindle, thereby technology difficulty continues to increase.

Traditional line motor is because the particularity of its structure has certain advantage aspect microminiaturized.Although line motor also includes stator and an output shaft that drives circle of a band permanent magnet, the big more parts of the more little difficulty of processing of product such as brush and commutator have been saved.Movably coil (being moving-coil) is inserted in the permanent magnet circuit, and when feeding electric current in the coil, the coil of energising is subjected to the effect of Lorentz force, drives axle motion together.According to the operation principle of line motor, if with coil attached to maintaining static on the pedestal, and use the magnetic loop structure instead spring-strip suspension on the shell that is fixed together with pedestal.Then when passing to current signal in the fixing coil, magnetic loop can with the effect of the reaction force of Lorentz force and spring leaf elastic restoring force under do straight-line oscillation.When the resonance frequency of the vibrational system that constitutes when " reed+magnetic loop " is consistent with signal of telecommunication frequency, the amplitude of straight-line oscillation will reach maximum.By in magnetic loop configuring weighted, the vibration force that can obtain to expect.

[utility model content]

Technical problem to be solved in the utility model is to provide the linear vibration motor that a kind of volume is less, be suitable for products such as mobile phone.

For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of linear vibration motor is provided, it comprises shell, pedestal, coil, latch plate, magnet, pole piece and magnetic bowl, described shell and pedestal form spatial accommodation, and the vibrating body that described magnet, magnetic bowl and pole piece constitute relies on two latch plates to support in the enclosure; The magnet that is coated with pole piece is arranged on magnetic bowl central authorities, forms magnetic gap between the circumference of magnet and the magnetic bowl medial surface; Described coil is fixed on the inner surface of described pedestal, and be inserted in the middle of the described magnetic gap, the inside and outside surface of this pedestal is respectively equipped with the positive and negative conductive region of separation, and the inside and outside lip-deep positive conductive region of pedestal is conducted, negative conductive region is conducted, and described coil is electrically connected with positive and negative conductive region on the pedestal inner surface.

Described pedestal is two-sided pcb board or ceramic substrate.

Described pedestal is a plastic base, embeds plastic shaping by the positive and negative electrode copper sheet that punching out in advance is good and makes.

As further improvement in the technical proposal, described magnetic bowl outer ring or bottom add counter weight device and stop bit device.

The beneficial effects of the utility model are: compare with existing vibrating motor, the utility model has been adopted as heir the advantage of line motor in configuration aspects, the big more parts of the more little difficulty of processing of product such as brush and commutator have been saved, both reduced the product overall volume effectively, also simplified the manufacture craft flow process, be more suitable in producing in batches and further miniaturization.In addition, compare with existing vibrating motor, because saved brush and commutator, in the product course of work mechanical wear and noise can not appear, and because the existence of latch plate elastic restoring force, the utility model response time is short, in case promptly the signal of telecommunication in the coil interrupts, vibrational system can in time stop vibration, and can be as the vibrating motor of prior art, even signal interruption still can be rotated certain hour with inertia.And pedestal outer surface electrode zone of the present utility model can pass through metal spring, spring leaf or other similar fashion and be connected with external circuit, perhaps is designed to be with paster pin pedestal to make linear vibration motor be used chip mounter and is assembled in the machine product.

[description of drawings]

The utility model is described in further detail below in conjunction with the drawings and specific embodiments:

Fig. 1 is the axial cross-sectional schematic of the utility model preferred embodiment.

Fig. 2 is the floor map of pedestal outer surface among Fig. 1.

Fig. 3 is the floor map of pedestal inner surface among Fig. 1.

Fig. 4 is the be hit by a bullet front view of spring plank of Fig. 1.

Fig. 5 is the front view of counterweight ring among Fig. 1.

[embodiment]

See also Fig. 1 to Fig. 5, be the preferred embodiment of the utility model, it comprises parts such as shell 1, pedestal 2, coil 3,

latch plate

4 and 5, circular magnet 6, magnetic bowl 7 and pole piece 8.Adopt UV glue coil 3 to be fixed on the inner surface of pedestal 2, the inside and outside surface of pedestal 2 is provided with the positive conductive region 21 and the negative conductive region 22 of separation respectively.This positive and negative

conductive region

21,22 is annular on pedestal 2 or two semicircle is arranged, and pedestal 2 inside and outside lip-deep positive and negative

conductive regions

21,22 are conducted respectively, in the present embodiment, offer through hole on the pedestal 2, pedestal 2 inside and outside lip-deep positive and negative

conductive regions

21,22 are respectively by the through hole conducting.Two exits of coil 3 are electrically connected respectively with the positive and negative

conductive region

21,22 on pedestal 2 inner surfaces.Form a spatial accommodation between shell 1 and the pedestal 2, in this spatial accommodation, magnet 6, magnetic bowl 7 rely on two

latch plates

4 and 5 to be supported in the shell 1 with the vibrating body that pole piece 8 constitutes, the magnet 6 that is coated with pole piece 8 is arranged on the central authorities of magnetic bowl 7, form magnetic gap between the circumference of magnet 6 and magnetic bowl 7 medial surfaces, coil 3 is inserted in the magnetic

gap.Latch plate

4 and 5 is made by sheet metal such as corrosion resistant plate, the center hollow out is to support magnetic loop system (being made of magnet 6+ magnetic bowl 7),

latch plate

4 and 5 outer rims are fixed in the shell 1, select different pierced patterns can obtain different coefficient of elasticity, thereby obtain different vibration forces.For strengthening the stability of vibrational system (magnetic loop system+latch plate), can make the gyratory directions of the dowel 41 in the latch plate 4 opposite with the dowel 51 of latch plate 5.

In order to strengthen vibration force, can add counter weight device 9 in magnetic bowl 7 outer rings or bottom, among the embodiment as shown in Figure 1, counter weight device 9 is the flange-like counterweight rings that are placed in outside the magnetic bowl 7, are positioned at two

latch plates

4 and 5 centres, the counterweight ring flange is provided with equally distributed stop bit post 91, and counterweight ring flange shown in Figure 5 is equally distributed 8 stop bit posts 91.Select the height of suitable stop bit post 91, with guarantee when the utility model from the side direction fall or when being subjected to impulsive force from the side, the magnetic loop system (being made of magnet 6+ magnetic bowl 7) that adds band stop bit post 91 counter weight devices 9 can not cause

latch plate

4 and 5 excessive deformations, thereby has improved reliability of products.

Described pedestal 2 can embed moulding (insert-molding) by electrode copper sheet that punching out in advance is good and plastics and make, coil 3 usefulness UV glue are fixed on pedestal 2 inner surfaces, the exit of coil 3 is electrically connected with inner surface electrode respectively, the outer surface electrode zone can pass through metal spring, spring leaf or other similar fashion are connected with external circuit, perhaps be designed to be with paster pin pedestal form, leave the groove 24 that can hold unnecessary scolding tin between both positive and negative polarity that this moment, the pedestal outer surface was manifested and the adjacent plastics thereof, make linear vibration motor to mount in the machine product with chip mounter.

Described pedestal 2 also can be made by two-sided pcb board, on the inner surface after the installation positive and negative polarities is set, and outer surface is provided with respectively the conductive region that is conducted with positive and negative polarities.

Described pedestal 2 can also be formed by ceramic making, select suitable prescription to make ceramic size (or pottery+glass paste) earlier, and adopt suitable manufacturing process to make raw cook, then, make conductive film layer and conductive through hole by methods such as silk-screens on raw cook, last sintering forms pedestal.

Adopt the linear vibration motor of two-sided pcb board or base of ceramic all can adopt surface mounting technology (SMT) to be assembled on the PCB of terminal installation, also can adopt metal spring, spring leaf or other similar fashion to make the utility model outer surface electrode zone form good being electrically connected with external circuit.

Claims

1, a kind of linear vibration motor, it comprises shell, pedestal, coil, latch plate, magnet, pole piece and magnetic bowl, described shell and pedestal form spatial accommodation, it is characterized in that: the vibrating body that described magnet, magnetic bowl and pole piece constitute relies on two latch plates to support in the enclosure; The magnet that is coated with pole piece is arranged on magnetic bowl central authorities, forms magnetic gap between the circumference of magnet and the magnetic bowl medial surface; Described coil is fixed on the inner surface of described pedestal, and be inserted in the middle of the described magnetic gap, the inside and outside surface of this pedestal is respectively equipped with the positive and negative conductive region of separation, and the inside and outside lip-deep positive conductive region of pedestal is conducted, negative conductive region is conducted, and described coil is electrically connected with positive and negative conductive region on the pedestal inner surface.

2, linear vibration motor as claimed in claim 1 is characterized in that: described pedestal is two-sided pcb board or ceramic substrate.

3, linear vibration motor as claimed in claim 2 is characterized in that: offer through hole on the described pedestal, the inside and outside lip-deep positive and negative conductive region of pedestal is respectively by the through hole conducting.

4, linear vibration motor as claimed in claim 1 is characterized in that: described pedestal is a plastic base, embeds plastic shaping by the positive and negative electrode copper sheet that punching out in advance is good and makes.

5, linear vibration motor as claimed in claim 4 is characterized in that: after the described plastic base moulding, leave the groove that holds unnecessary scolding tin between both positive and negative polarity that outer surface appears and the adjacent plastics thereof.

6, as any described linear vibration motor in the claim 1 to 5, it is characterized in that: described magnetic bowl outer ring or bottom add the counter weight device that is used to increase vibration force.

7, linear vibration motor as claimed in claim 6 is characterized in that: described counter weight device is to be placed in the counterweight ring that the magnetic bowl is outer, be positioned at the middle flange-like of two latch plates, and described counterweight ring flange is provided with equally distributed stop bit post.

8, as claim 1,2 or 3 described linear vibration motors, it is characterized in that: the positive and negative conductive region on the described pedestal is annular or two semicircle is arranged.

9, linear vibration motor as claimed in claim 8 is characterized in that: described magnetic bowl outer ring or bottom add counter weight device and stop bit device.