CN103959181B

CN103959181B - Clock and watch motor

Info

Publication number: CN103959181B
Application number: CN201280059557.1A
Authority: CN
Inventors: 铃木利明
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-01
Filing date: 2012-11-26
Publication date: 2016-09-21
Anticipated expiration: 2032-11-26
Also published as: WO2013080901A1; JP5852424B2; CN103959181A; JP2013117391A

Abstract

The present invention provides a kind of clock and watch motor, and the first problem is to reduce whir when rotor rotates, and the second problem is to prevent from impacting the bending of the axle caused, and the 3rd problem is to realize agonic starting characteristic.The inertia plate (115) being used for giving the big inertia of rotor is configured at than rotor magnet (113) more by the opposition side of upper axis support (111), and, bottom axle support is formed by mortise (116), the base (116a) of mortise is to be positioned at the thickness direction center (121) than stator more by being formed in the way of upper axis support side, and, mortise axle (41) at least formed on lower basal plate is formed by thin footpath rotational slide axle (41a) and particle size rotary shaft (41b), the gap of the particle size rotating hole (116b) of particle size rotary shaft 41b and rotor or the internal diameter (115a) of inertia plate is set as preventing the gap of thin footpath rotational slide axle bending.And then, the magnetic pole of rotor magnet (113) and the crown (112a) of little gear shape are maintained at certain angle.

Description

Clock and watch motor

Technical field

The present invention relates to the structure of clock and watch surrounding motors, especially relate to the motor based on rotor Structure around.

Background technology

The clock and watch of clock and watch, particularly timing handle the needle clock and watch as main flow continuously with the what is called of Continuous Drive second hand. For making this driving of handling the needle continuously smooth and easy, at present clock and watch motor is carried out various research.As this One of research, such as, have following technology, as Patent Document 1, by making inertia rings 1a and as clock The rotor integration of 1 part of table motor, eliminates the delicate swing of rotor, by the rotation of rotor Rotary speed maintains the most certain.

Secondly, Fig. 8 is Fig. 2 of patent documentation 1, with reference to Fig. 8, prior art is described.

Clock and watch motor is formed by rotor 1, stator 2 and not shown coil.Rotor 1 is sheded baby teeth by having The rotor body 1j of wheel portion 1f and incorporating section 1d, annular magnet 1e, inertia rings 1a and upper and lower axle Portion 1g etc. are constituted.And, rotor 1 dust cover 3 bearing recess axle support on tenon axle portion 1g, in The bearing recess axle of plate 4 supports lower tenon axle portion 1g and it is rotatably kept.

2 is stator, be configured at annular magnet 1e with rotor 1 to position.By by not shown The magnetic field that coil produces, stator 2 alternately convert N pole and S pole, thus, rotor rotation, via in Between take turns 6,7 and make to be installed on the not shown pointer of output shaft through output gear and rotate, show the moment. In order to the rotary speed making the motor of cogging is homogeneous, above-mentioned inertia rings 1a is the most still using.

But, the axle of this rotor 1 props up that structure is used as described above the most all to carry out rotating by axle portion 1g Structure.But, the axial center of rotation of rotor 1 is in big with the center of the thickness of stator 2 Cause consistent position.Therefore, the particularly axle at lower tenon props up in structure, and the middle plate of fixing side is shrinkage pool, And axle is convex form under the rotor of drawer at movable side, therefore, the magnetic pole of annular magnet is attracted by stator, with above-mentioned Shrinkage pool is fulcrum, and rotor 15 significantly topples over (especially pronounced before upper plate assembling) to dust cover 3 side, by Heavier in above-mentioned inertia rings, so there is processing, combining bias that error brings and flat vibration brings Dynamic unbalance, when rotor rotates, upper tenon produces the vibration of transverse direction, and rotor 1 enters while swinging Row rotates, and therefore, the dust cover 3 that rubs rotates, and accordingly, there exist generation and is put by dust cover 3 The problem of stor whir.

It addition, the axle of existing lower tenon axle portion 1g is by thin and compare rotor magnet i.e. (the 1 of annular magnet 1e / 2) axle that thickness extends to middle plate 4 direction further is formed.This is the rotation in order to compare rotor 1 Center makes the length of the axle of lower tenon axle portion 1g longer, so that the smooth rotation of rotor 1.But, for This and time axle is longer, the lower tenon axle easy bending of portion 1g and clock and watch are applied impact, thus there is axle bending Problem.

As the countermeasure of tenon bending, as long as the material as this rotor uses the material that intensity is high.Make For this material, it is considered to POM (polyacetal resin).The bending strength of this material is 88Mpa, and intensity is filled Point, but owing to cost is high, and hardness is hard, so having the problem that whir increases.Therefore, use Bending strength is the ABS PS resin of about 37Mpa.But, this material has and is not resistant to fall The shortcoming of impact.

Although it addition, rotor magnet 1e uses has ambipolar Magnet, but not having in patent documentation 1 Recording, correspond, usual mill pinlon portion 1f uses anti-reversing profile of tooth.If the position of this magnetic pole and sheding baby teeth Not necessarily, then rotation when starting is unstable for the relation of the crown position of wheel portion 1f, there is starting characteristic and produces The problem of raw deviation.

Prior art literature

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 10-336931 publication

Summary of the invention

Invent problem to be solved

The problem that the invention solves the problems that is to solve above-mentioned problem of the prior art point, and the first problem is, makes Whir when rotor rotates reduces, and the second problem is, prevents from impacting the axle bending caused, and then, 3rd problem is, it is achieved agonic starting characteristic.

For solving the technical scheme of problem

First aspect present invention provides a kind of clock and watch motor, and it is formed by rotor, stator and coil, Described rotor possesses the inertia plate of the rotor magnet being held in rotor cup and the downside being positioned at this rotor magnet, Described stator is oppositely disposed with the side of described rotor magnet, and described coil is for being integrally formed at this stator Coil core embeds, and rotor therein is formed by components described below, and makes these parts be formed on coaxial, i.e. Upper axis support, it is supported on the tenon axle eye of upper substrate by axle；Little gear, it is used for transmitting rotation； Rotor magnet and inertia plate, it is held in described rotor cup；Bottom axle support, it passes through bottom base The mortise axle of plate rotatably supports, in described clock and watch motor, described bottom axle support by Mortise is formed, and described mortise is formed as its base and reaches more substantially uniform than with the position of centre of gravity of described rotor The degree of depth of described upper axis support side is more leaned in the thickness direction center of described stator, thereby, it is possible to Reduce whir when rotor rotates.

It addition, in the clock and watch motor of second aspect present invention, the mortise of described bottom axle support by Thin rotational slide hole, footpath and particle size rotating hole are constituted, and, the mortise axle of described lower basal plate is also by carefully Footpath rotational slide axle and particle size rotary shaft are formed, and are reaching to be positioned at described upper axis support side with its base The rotational slide hole, described thin footpath that formed of the mode of the degree of depth in engage described thin footpath rotational slide axle, it addition, Described particle size rotating hole engage described particle size rotary shaft, and, this particle size rotary shaft be formed as The gap preventing described thin footpath rotational slide axle bending engages, and causes thereby, it is possible to prevent from impacting Axle bending.

It addition, in the clock and watch motor of third aspect present invention, be positioned on described becoming with its base The mortise engaging of the described bottom axle support that the mode of the degree of depth of axle support side, portion is formed is formed at described The thin footpath rotational slide axle of the mortise axle of lower basal plate, the particle size rotary shaft of described mortise axle relative to The internal diameter of described inertia plate is oppositely disposed for the gap preventing described thin footpath rotational slide axle bending, by This, it is possible to prevent from impacting the axle bending caused.

It addition, in the clock and watch motor of fourth aspect present invention, described rotor magnet with from described coaxially When direction is observed, the straight line and the link that link the magnetic pole of described rotor magnet through its axle center are formed at institute State a pair anti-reversing tooth of little gear straight line each other and be held in described rotor cup while there is certain angle In, thereby, it is possible to realize agonic starting characteristic.

It addition, in the clock and watch motor of fifth aspect present invention, formed in the following side of described rotor cup There is positioning and guiding portion when being pressed into described rotor magnet, thereby, it is possible to easily and reliably with certain angle Degree positions.

Invention effect

The inertia plate being used for giving the big inertia of rotor is configured at and compares rotor by the clock and watch motor of the present invention The thickness direction center of Magnet is more by axle support side, described bottom, specifically, by rotor Rotor magnet and inertia plate is kept from the stacking in order of upper axis support side, it is possible to be greatly reduced and turn in Bei Whir when son rotates.

It addition, with the axle support of rotor as mortise, this mortise is rotated by rotational slide hole, thin footpath and particle size Hole is formed, and engages respectively with the thin footpath rotational slide axle being formed at lower basal plate and particle size rotary shaft, can prevent Only impact the bending of the axle brought.

It addition, by the crown of the magnetic pole of rotor magnet and little gear shape is maintained at certain angle, energy Enough realize agonic starting characteristic.

Accompanying drawing explanation

Fig. 1 is the figure of the structure of the rotor representing one embodiment of the invention, is the side sectional view of rotor.

Fig. 2 is the side sectional view of the surrounding motors representing watch and clock movement.

Fig. 3 is to represent the side sectional view that the axle of rotor props up structure, and (a) represents common rotation status, (b) Represent state when being applied with impact from side.

Fig. 4 is the side sectional view of the other embodiments representing that the axle of display rotor props up structure, and (a) represents Common rotation status, (b) represents state when being applied with impact from side.

Fig. 5 is to represent the side sectional view that the axle of rotor when not having inertia plate props up structure, and (a) represents logical Normal rotation status, (b) represents state when being applied with impact from side.

Fig. 6 is to represent relative to the pole of rotor magnet and the figure of the position relationship of the crown of little gear, (a) Being above figure, (b) is side sectional view, and (c) is to scheme below.

The side sectional view of assemble method when Fig. 7 is to represent assemble rotor Magnet.

Fig. 8 is the structure sectional view of the clock and watch motor of prior art.

Detailed description of the invention

The rotor structure of the present invention is by upper axis support, for transmitting the little gear of rotation, rotor magnet Formed with bottom axle support, and there is the inertia plate giving rotor inertial forces.Inertia plate is configured at ratio Above-mentioned rotor magnet is more by the opposition side of upper axis support, and bottom axle support is formed by mortise.This tenon The base of eye has to be positioned at the mid-depth position than stator more by being formed in the way of upper axis support side Structure, it addition, the mortise of rotor is formed by rotational slide hole, thin footpath and particle size rotating hole, with bottom base The thin footpath rotational slide axle of plate and particle size rotary shaft engage respectively, or, mortise and the thin footpath of lower basal plate Rotational slide axle card merges rotation, and, particle size rotary shaft and the inertia plate being held in rotor cup keep Certain interval and oppositely disposed, and, the magnetic pole of rotor magnet and the tooth top of pinion gear teeth shape are remained There is certain angle.

Below, embodiments of the invention are illustrated.First, use Fig. 2 that the electricity of watch and clock movement is described Structure around motivation.20 is watch and clock movement, has following structure.30 is upper as upper substrate Plate, 40 is the middle plate as lower basal plate, and 50 is base plate, is accommodated with between upper plate 30 and base plate 50 Comprise each part of the watch and clock movement 20 of middle plate 40.And, each wheel row comprising rotor described later are main Supported by upper plate 30 and middle plate 40 axle.It addition, upper plate 30 and base plate 50 double as upper and lower dust cover (institute Meaning shell).

100 is clock and watch motor, rotor 110 and stator 120 and coil 130 are formed.Stator 120 and the structure of rotor 110 same as the prior art, stator 120 and the centre bore through coil 130 Coil core forms as one.Rotor 110 by as the upper tenon axle 111 of upper axis support, little gear 112, Rotor magnet 113, rotor cup 114, inertia plate 115 and the lower mortise 116 as bottom axle support Formed.For rotor 110, upper tenon axle 111 is supported by tenon axle hole 31 axle of upper plate 30, lower mortise 116 are supported by mortise axle 41 axle of middle plate 40, thus rotor 110 rotates.And, if right Coil 130 gives electronic signal, then produce magnetic field in stator 120, make rotor 110 rotate, via little Gear 112 drives the wheel row 60 of below the 7th gear of next section, when making clock and watch pointer rotate and show Carve.Now, in the embodiment of the present application, second hand is set to handle the needle continuously.

Below, the structure of the rotor of the present embodiment is illustrated.The structural change of this rotor inertia plate The position of 115, it is the shape of lower mortise 116, the position of lower mortise 116 with bottom axle support.That is, With reference to Fig. 1, from upper side, upper tenon axle 111, little gear 112, rotor cup 114 and lower mortise 116 Formed as one by plastic components.Rotor magnet 113 and inertia plate 115 are all formed as ring-type, rotor magnetic Ferrum 113 and inertia plate 115 are held in the inner circumferential of rotor cup 114 in order from upper tenon axle 111 side.In order to The assembling making rotor magnet 113 and inertia plate is easy, and the inner circumferential of rotor cup 114 is set to two sections.That is, Rotor magnet 113 is held stationary inner circumferential 114a in path, additionally inertia plate 115 be held stationary in Inner circumferential 114b in big footpath.Below, this holding structure is illustrated.

As seen in Figure 1, the position of centre of gravity 110a of rotor 110 and the center 121 of stator 120 with The mode being configured at roughly the same position is formed.The center of position of centre of gravity 110a Yu stator for making this rotor Position 121 is consistent, is existed relative to rotor magnet 113 by the inertia plate 115 being used for giving big inertia The opposition side of tenon axle 111, is held in inner circumferential 114a of rotor cup 114 adjacently so that it is compare rotor magnet 113 on the lower.

And then, the position of the lower mortise 116 of the present invention has been also carried out research.That is, as it is shown in figure 1, The degree of depth making the hole of lower mortise 116 reaches position of centre of gravity 110a more top tenon axle 111 side than rotor 110. That is, it is set as that the bottom surface 116a making lower mortise 116 reaches more substantially uniform than the position of centre of gravity 110a with rotor The degree of depth of more top tenon axle 111 side, thickness direction center 121 of stator 120.Certainly, formed The mortise axle 41 being formed at middle plate 40 for making lower mortise 116 engage reaches the thickness than stator 120 The height of more top tenon axle 111 side, center, direction 121.

So, owing to inertia plate 115 to be configured at the opposition side of tenon axle 111 more top than rotor magnet 113, So, the weight saving of upper tenon axle 111 side more closer to the top than the position of centre of gravity 110a of rotor, rotor 110 Spin stabilization, it is possible to reduce the swing of the lateral vibration of upper tenon axle 111.Further, since by inertia plate 115 The inner circumferential of rotor cup 114 is fixed in press-in, it is possible to what the mismachining tolerance reducing inertia plate 115 was brought The uneven measurement of quality.As a result of which it is, weaken with the friction of upper plate 30, vibrational energy reduces, by upper plate The 30 air borne whirs amplifying the sound produced substantially reduce, it is possible to realize close to noiseless state.

Then, the bottom axle to the present embodiment props up structure and illustrates.Fig. 3 is for the present embodiment is described Bottom axle prop up the sectional view of structure, (a) represents common rotation status, and (b) represents and be applied with impact State.In (a) figure, the lower mortise 116 of the present embodiment is formed by two sections of band stepped holes.That is, by Thin footpath rotational slide hole 116b and particle size rotating hole 116c is formed.It is formed at middle plate 40 corresponding thereto Mortise axle 41 as it is shown on figure 3, also by thin footpath rotational slide axle 41a and particle size rotary shaft 41b this two Section is formed.And, thin footpath rotational slide axle 41a engages with thin footpath rotational slide hole 116b, it addition, slightly Footpath rotary shaft 41b engages with particle size rotating hole 116c, and rotor 110 rotates.Additionally, upper tenon axle 111 Rotate so that minimum clearance engages with the tenon axle hole 31 being formed at upper plate 30.

Under common use state, particle size rotary shaft 41b and particle size rotating hole 116c keep having certain journey The state in the gap of degree, by thin footpath rotational slide axle 41a and the engaging of thin footpath rotational slide hole 116b Rotationally support rotor 110.Here, use (b) figure explanation watch and clock movement 20 feelings impacted such as to be fallen Condition.When rotor 110 applies the power of arrow F because of impact, (figure generally, due to Fig. 3 (b) exists Use under the state that have rotated 90 ° counterclockwise, so explanation of force F is made from top when figure Situation), rotor 110 is slightly tilted to the opposition side of power F.Because of this inclination, lower mortise 116 thick Footpath rotating hole 116c touches with particle size rotary shaft 41b of the mortise axle 41 being formed at middle plate 40, prevents It further tilts.

Here, simply illustrate the principle of tenon bending when preventing mortise axle 41 from bending.Watch and clock movement 20 The direction that falls be upper with arrow F, naturally fall to the direction of arrow and knock base plate.Now, rotor 110 Bear the acceleration of 100G level, be particularly acting on the big rotor magnet of quality 113 and inertia plate 115 Certain mortise axle 41 side.Mortise axle 41 is formed with thin footpath to reduce sliding friction, therefore, when When bearing from horizontal impact, rotor more than 110 tenon axle 111 is fulcrum bending, and center is moved.Then, The center of rotor is also moved, and therefore, particle size rotary shaft 41b contacts with the particle size rotating hole 116c of rotor, Stopping at will not be in the range of bending.

That is, thin footpath rotational slide axle 41a is tilted with the clearance of thin footpath rotational slide hole 116b, therefore, Thin footpath rotational slide axle 41a will not bending.That is, certain of particle size rotary shaft 41b and particle size rotating hole 116c The gap of degree refers to that thin footpath rotational slide axle 41a can incline in the clearance of thin footpath rotational slide hole 116b Oblique gap.When impact disappears, as shown in figure (a) figure, return to usual position, therefore, it is possible to fill Divide and prevent tenon bending.Additionally, due to rotor and lower basal plate are made of plastic, it is possible to be integrally formed, Cost will not be brought to raise.

Then, the other embodiments of the countermeasure about this tenon bending is illustrated.Fig. 4 is to represent that it is tied The sectional view of structure.The structure different from Fig. 3 is, the lower mortise 116 of rotor 110 is common one section Structure, and use following structure, i.e. engage with the thin footpath rotational slide axle 41a of mortise axle 41 and carry out Rotating, the internal diameter 115b reducing inertia plate 115a makes it and is formed at mortise axle 41 thick of middle plate 40 Footpath rotary shaft 41b to.When being impacted and rotor 110 is applied the power of arrow F, rotor 110 It is slightly tilted to the opposition side of power F.Now, the internal diameter 115b of inertia plate 115a touches mortise axle 41 Particle size rotary shaft 41b and prevent tilt.In Fig. 3, similarly, due to thin footpath rotational slide axle 41a It is tilted with the clearance of thin footpath rotational slide hole 116b at it, so thin footpath rotational slide axle 41a will not roll over Curved.That is, the gap of certain degree of the internal diameter 115b of what is called particle size rotary shaft 41b and inertia plate 115a, be Refer to that thin footpath rotational slide axle 41a can be in the tilted gap of the clearance of lower mortise 116.

As it has been described above, to major general's mortise axle 41 as thin footpath rotational slide axle 41a and particle size rotary shaft 41b, thin footpath rotational slide axle 41a are used for rotational slide axle, are used as to prevent tenon from rolling over by particle size rotary shaft 41b Curved axle, therefore, although thin footpath rotational slide axle 41a easily slight bending, but owing to particle size rotates The existence of axle 41b, thus rotor 110 is in rotation, tenon will not bending.

Then, to the reality propping up the different tenon bending countermeasure of structure from the bottom axle shown in above-mentioned Fig. 3 and Fig. 4 Execute example to illustrate.Fig. 5 is that (a) represents common for illustrating that this bottom axle props up the sectional view of structure Rotation status, (b) represents the state being applied with impact.This bottom axle props up shown in structure and Fig. 3 and Fig. 4 Bottom axle prop up structure and be a difference in that, the structure of the bottom axle support of the state of noninertia plate.That is, As the structure of the tenon bending countermeasure of Fig. 5, such as, prop up with the bottom axle of Fig. 3 and be configured to benchmark, at (a) Usual use state under, particle size rotary shaft 41b and particle size rotating hole 116c keep having between certain degree The state of gap, is rotated by thin footpath rotational slide axle 41a and the engaging of thin footpath rotational slide hole 116b and props up Forward son 110.When impacts such as watch and clock movement 20 are fallen, as shown in (b) figure, when shown in arrow Power F of impact when putting on rotor 110, rotor 110 is slightly tilted to the opposition side of power F.Logical Cross this inclination, the particle size rotating hole 116c of lower mortise 116 and the mortise axle 41 being formed at middle plate 40 Particle size rotary shaft 41b is touched, it is therefore prevented that it further tilts.This prevent the principle of tenon bending with It is identical, so omitting the description that the bottom axle of Fig. 3 props up structure.

Then, the structure being used for improving startability of the rotor of the present embodiment is illustrated.Fig. 6 represents The structure of rotor, (a) represents above figure, and (b) represents side sectional view, and (c) represents figure, Fig. 6 below It it is the sectional view of the method illustrating that rotor magnet is pushed rotor cup by use fixture.

As shown in Fig. 6 (a), the little gear 112 of the rotor of the present embodiment uses a pair anti-reversing tooth 112a. It addition, rotor magnet 113 uses has ambipolar Magnet.By to the anti-reversing linking this little gear The line 110b of the crown position of tooth 112a and the center 110a of rotor 110 correctly positions rotor magnetic The phase angle of the polar sites of ferrum 113 and eliminate the deviation of starting characteristic.

I.e., in the present embodiment, (observe from coaxial direction) in Fig. 6 (a), be formed as linking rotor The straight line of the magnetic pole of Magnet 113 links formation relative to center (axle center) the position 110a through rotor In a pair anti-reversing tooth 112a straight line 110b each other of little gear 112, the position of the certain angle θ that staggers 110c.For realizing this position, formed to become at two and push rotor magnet 113 to the downside of rotor cup 114 Time the guide part 114c of location division.The crown of this guide part 114c and the anti-reversing tooth 112a of little gear It is formed at certain position positional symmetry.This position exists to side from the crown position of anti-reversing tooth 112a Formed in the range of 90 °, form another guide part 114c in the position with its symmetry.Used in order to easily press Property plate 115, the internal diameter of this guide part 114c be formed as than press-in inertia plate 115 internal diameter slightly larger.That is, Internal diameter as rotor cup 114 has maximum inner diameter.

Use the method that Fig. 7 illustrates rotor magnet 113 is pushed rotor cup 114.70 is to push fixture, It is made up of chuck body 71 and fixture Magnet 72.73 is carrying fixture, has and carries out rotor 110 determining Hole, the location 73a of position.Fixture Magnet 72 coincide with the bipolar of rotor magnet 113, has bipolarity, example As configured in the way of upside by N pole downside, S pole in the drawings.If rotor magnet 113 is close to this folder Tool Magnet 72, then rotor magnet 113 and fixture Magnet 72 are fitted with opposite polarity as shown in Figure 6.

Thus, which polarity is the polarity of fixture Magnet 72 be in is known, therefore, if by this position Position relative to the guide part 114c of rotor cup 114 pushes at certain orientation and is pressed into, the most relatively Can be by the polarity orientation of rotor magnet 113 in necessarily in the crown position of the anti-reversing tooth 112a of little gear The direction i.e. position of θ.So, will by the crown position of the anti-reversing tooth 112a relative to little gear The phase angle of the polarity of rotor magnet 113 is defined as necessarily, it is possible to realize the agonic clock of starting characteristic Table motor 100.

Industrial applicability

The invention is not restricted to not only make timer, and clock and watch when making the second hand of wrist-watch handle the needle continuously etc. are used Motor, it is also possible to apply as the motor of various precision equipments.

Symbol description

20 watch and clock movements

30 upper plates

Mortise on 31

Plate in 40

41 mortise axles

41a thin footpath rotational slide axle

41b particle size rotary shaft

50 base plates

70 push fixture

72 fixture Magnet

73 carrying fixtures

100 clock and watch motor

110 rotors

The position of centre of gravity of 110a rotor

Tenon axle on 111

112 little gears

113 rotor magnets

114 rotor cup

114c guide part

115,115a inertia plate

115b internal diameter

116 times mortises

116a base

Rotational slide hole, 116b thin footpath

116c particle size rotating hole

120 stators

The thickness direction center of 121 stators

130 coils

Claims

1. a clock and watch motor, it forms by rotor, stator and coil, and described rotor possesses holding In the rotor magnet of rotor cup be positioned at the inertia plate of downside of this rotor magnet, described stator with described turn The side of sub-Magnet is oppositely disposed, and described coil embeds, wherein for the coil core being integrally formed at this stator Rotor formed by components described below, and make these parts be formed on coaxial, i.e. upper axis support, It is supported on the tenon axle eye of upper substrate by axle；Little gear, it is used for transmitting rotation；Rotor magnet and used Property plate, it is held in described rotor cup；Bottom axle support, it is by the mortise axle of lower basal plate Rotatably supporting, described clock and watch motor is characterised by,

Described bottom axle support is formed by mortise, described mortise be formed as its base reach than with described turn The thickness direction center of the described stator that sub position of centre of gravity is substantially uniform more supports by described upper axis The degree of depth of side, portion.

Clock and watch motor the most according to claim 1, it is characterised in that described bottom axle supports The mortise in portion is made up of rotational slide hole, thin footpath and particle size rotating hole, and, the mortise of described lower basal plate Also formed by thin footpath rotational slide axle and particle size rotary shaft with axle, reaching to be positioned at described top with its base Engage described thin footpath in the rotational slide hole, described thin footpath that the mode of the degree of depth of axle support side is formed and rotate sliding Moving axis, it addition, engage described particle size rotary shaft at described particle size rotating hole, and, this particle size rotary shaft Be formed as the gap for preventing described thin footpath rotational slide axle bending to engage.

Clock and watch motor the most according to claim 1, it is characterised in that becoming with its base The mortise engaging of the described bottom axle support that the mode of the degree of depth being positioned at described upper axis support side is formed It is formed at the thin footpath rotational slide axle of the mortise axle of described lower basal plate, the particle size rotation of described mortise axle Rotating shaft relative to the internal diameter of described inertia plate for the gap pair preventing described thin footpath rotational slide axle bending To configuration.

4. according to the clock and watch motor according to any one of claims 1 to 3, it is characterised in that institute State rotor magnet, when described coaxial direction is observed, to link the magnetic of described rotor magnet through its axle center The straight line of pole has certain angle with linking a pair anti-reversing tooth being formed at described little gear straight line each other It is held in described rotor cup degree.

Clock and watch motor the most according to claim 4, it is characterised in that in described rotor cup Following side is formed with positioning and guiding portion when being pressed into described rotor magnet.