CN102340204B

CN102340204B - Motor shell with thickened four corners

Info

Publication number: CN102340204B
Application number: CN201010230431.9A
Authority: CN
Inventors: 白木学; 王辉
Original assignee: Shicoh Motor Shanghai Co Ltd
Current assignee: New Shicoh Motor Co Ltd
Priority date: 2010-07-19
Filing date: 2010-07-19
Publication date: 2014-10-15
Anticipated expiration: 2030-07-19
Also published as: CN102340204A

Abstract

The invention relates to a motor shell with thickened four corners, which has a cylindrical part with equal wall thickness and is characterized in that the motor shell additionally has four corners which are formed on the external side of the cylindrical part in a thickening way, and the four corners are respectively arranged at the ends of two diameters which are perpendicular to each other. On the premise that the overall exterior size of a motor is not increased, the thickness of the shell is naturally increased by adopting a four-corner thickening structure and magnetism is fully absorbed and utilized in the shell; and at the same time, since the four-corner structure can also take an effect of substituting for a bracket to fix the motor, the motor shell additionally has the great advantages that the part number is reduced, the motor shell is easy to assemble and the manufacturing cost is reduced.

Description

The motor case of four jiaos of thickening types

Technical field

The present invention relates to a kind of mobile phone and apply to SMT motor (paster motor) shell in field of mobile phones.

Background technology

As a rule, as shown in Figure 1, it is a kind of structure of annular to the Shell structure of existing cylindrical shape vibrating motor, even thickness, and the magnetic line of force of motor magnetite forms loop by shell.

As everyone knows, in the sense, it is blocking up the normal performance of magnetite performance to the thickness of motor case, is determining the magnetite magnetic possibility whether carried is lived completely.But in above-mentioned Shell structure, as adopted high-performance magnetite, shell possibly cannot all carry the magnetic line of force of its high-strength density, causes the magnetic line of force to external leakage, the leakage field phenomenon that namely we say conventionally.This leakage field phenomenon due to magnetite, the performance that motor expection will reach may still cannot be reached, even if reach the waste that has also additionally increased cost due to this nonphysical wear of magnetite performance, and leakage field phenomenon also can have influence on the components and parts between adjacent motor.That is to say, owing to adopting high-performance magnetite for obtaining as far as possible the optimum performance of motor, can under existing Shell structure, very likely produce leakage field phenomenon, magnetite purchases that valency aspect is relatively high not to be said, also exist its magnetite performance by carrying completely and the risk of effectively utilizing; And if adopt low performance magnetite, motor is very likely because obtaining sufficient actuating force, generation can not meet the problem of customer requirement style.Even if so just how to excavate out a kind of employing high-performance magnetite, its magnetic also can be carried completely and be brought into play shell that it should be effective is a problem that is worth research in technical field at present.

Summary of the invention

The object of the present invention is to provide a kind of motor case of four jiaos of thickening types, by the technological transformation of existing cylinder-like shell is successfully solved to aforementioned problems.

The motor case of four jiaos of thickening types of the present invention, the cylindrical portion of wall thickness such as has, and is characterized in also having in the outside of cylindrical portion and by wall thickness, thicken four bights that form, and these four bights lay respectively at the end of two vertical diameters of cylindrical portion.

The motor case of four jiaos of described thickening types, its further feature is, and the profile of this motor case has four planes, and each plane connects two adjacent bights.

The motor case of four jiaos of described thickening types, its further feature is that described bight is square, bevel edge, stairstepping or circular arc.

The invention has the beneficial effects as follows:

Do not increasing under the condition of motor overall appearance size, adopt four jiaos of thickening types to construct nature to increase its outer casing thickness, when magnetic being completely absorbed in shell body and making full use of, it is again owing to being four jiaos of type structures, so doublely playing alternative bracket, it fixes the effect of motor, so reduce in addition the very big advantage that manufacturing cost was counted, and easily assembled and reduced to component.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the shape of existing motor case, (a) is front view, is (b) viewgraph of cross-section.

Fig. 2 is the viewgraph of cross-section of motor case of the present invention.

Fig. 3 is the comparison diagram of motor case of the present invention and existing motor case magnetic property, is (a) schematic diagram of the magnetic property of existing motor case, is (b) schematic diagram of the magnetic property of motor case of the present invention.

Fig. 4 is the comparison diagram that motor case of the present invention and existing motor case are installed to the structure on substrate, is (a) that existing motor is installed to the structural map on substrate, is (b) that motor case of the present invention is installed to the structural map on substrate.

Fig. 5 is the schematic diagram of the multiple modification of motor case of the present invention, (a) be the schematic diagram of a kind of structure of motor case, (b) being the schematic diagram of another kind of structure, is (c) schematic diagram of another kind of structure, is (d) schematic diagram of another kind of structure.

Embodiment

As shown in Figure 2, overall dimensions a, the b of motor case 10b are constant, and its wall thickness of four jiaos is thickened, and bight 100 shows with shade in the drawings.Net shape is by mould straight forming, and forming process is substantially similar to the forming process of the motor case shown in Fig. 1, and does not worry because this kind of square shape can increase difficulty of processing or expend the more multi-processing time.

Therefore, as shown in Figure 2, the end that motor case 10b the cylindrical shape of wall thickness such as has and lays respectively at columnar two vertical diameters in the bight 100 of 100, four thickenings in bight of four thickenings in cylindrical shape outside.Two adjacent corners 100 by plane 101, connected or two adjacent corners 100 between form plane 101, the profile of motor case 10b has four planes 101.

As shown in Figure 3, the magnetic line of force sends at the N utmost point distribution situation of magnetite and shell, through the conduction of shell, directly gets back to the S utmost point.The magnetic line of force that the N utmost point sends all will pass through the shell place of the intersection of N, the S utmost point after conducting by shell, so be the place that the magnetic line of force is the most intensive herein.Now, when flux density is greater than the limit that shell can bear, the magnetic line of force can leak to outside shell, cannot get back to the S utmost point.And four jiaos of shell thickening just at the intersection of the most intensive N of the magnetic line of force, the S utmost point, it due to the increase of thickness makes shell institute can the corresponding reinforcement of bearing capacity, effectively prevented that the magnetic line of force herein from revealing.

As shown in Fig. 3 (a), black thick arrow in both sides represents the density of the magnetic line of force, has reached the limit that shell can carry, if magnetite grade is higher again, will cause the magnetic line of force excessive, has limited the actuating force of motor.

As shown in Fig. 3 (b), in magnetite situation with ad eundem, we can find out that, in thickening type shell both sides, the distribution of density of line of magnetic force only reaches 1/3 left and right of shell bearing capacity, the grade of magnetite also has the very large rising space, and the actuating force of motor can obtain more effective assurance.

On the other hand, as shown in Fig. 4 (a), the SMT paster motor 10a of general cylindrical housing, need to install bracket 20 additional outside so that motor is fixed on substrate by level.As shown in Fig. 4 (b), and be processed into after four jiaos of type structures with plane 101, can save the step that installs bracket additional, can directly shell be fixed on substrate.So, from the contrast figure of Fig. 4, can find out, in the situation that not increasing overall appearance size, adopt four jiaos of thickening types to construct nature to increase outer casing thickness, when magnetic being completely absorbed in shell body and making full use of, can also doublely play and substitute the effect that bracket fixes motor, have and reduce the very big advantage that manufacturing cost was counted, and easily assembled and reduced to component.

The present invention is not only limited to shell the four jiaos of thickening shapes that make as shown in Fig. 5 (a), as long as in the situation that not departing from aim of the present invention, according to different situations, need to do the change of various shapes, therefore as bight 100 also can make the square as shown in Fig. 5 (b), the bevel edge as shown in Fig. 5 (c), the stairstepping as shown in Fig. 5 (d) etc., the profile of motor case is four limit square (square) motor cases 11, octagon motor case 12, four jiaos of square motor cases 13 jaggy etc.

Claims

1. the motor case of four jiaos of thickening types, the cylindrical portion etc. with wall thickness, it is characterized in that, also have in the outside of cylindrical portion and by wall thickness, thicken four bights that form, these four bights lay respectively at the end of two vertical diameters of cylindrical portion, the magnetic line of force of the magnetite in cylindrical portion sends at the N utmost point, conduction through shell, directly get back to the S utmost point, the magnetic line of force that the N utmost point sends all will pass through N after conducting by shell, the shell place of the intersection of the S utmost point, and the bight of shell thickening is just at the most intensive N of the magnetic line of force, the intersection of the S utmost point, due to the increase of thickness makes shell institute can the corresponding reinforcement of bearing capacity, effectively prevented magnetic line of force leakage herein.

2. the motor case of four jiaos of thickening types as claimed in claim 1, is characterized in that, the profile of this motor case has four planes, and each plane connects two adjacent bights.

3. the motor case of four jiaos of thickening types as claimed in claim 1, is characterized in that, described bight is square, bevel edge, stairstepping or circular arc.