CN202028978U

CN202028978U - Automatic opening/closing apparatus of a holder used for grinding micro drill bit

Info

Publication number: CN202028978U
Application number: CN201120047224XU
Authority: CN
Inventors: 姚志金; 林武庆; 黄兴才
Original assignee: CIN PHOWN TECHNOLOGY Co Ltd
Current assignee: CIN PHOWN TECHNOLOGY Co Ltd
Priority date: 2011-02-24
Filing date: 2011-02-24
Publication date: 2011-11-09
Anticipated expiration: 2021-02-24

Abstract

The utility model relates to an automatic opening/closing apparatus of a holder used for grinding micro drill bit. a first clamping jaw and a second clamping jaw are coaxially pivoted on the seat body of the holder; a swing type cam is fixed on the first clamping jaw; a swing member and a rotary type cam are pivoted on the seat body; both ends of the swing member are respectively contacted with the swing type cam and the second clamping jaw; the rotary type cam is contacted with the first clamping jaw; a driver is used to drive the rotary type cam to rotate by a straight line driving force, the, drive the first clamping jaw and the swing type cam to swing, and drive the second clamping jaw by the swing member; thereby to control the first and the second clamping jaw to hole and release the drill bit edge, in order to improve the edge positioning accuracy.

Description

Grind the automatic closing device of micro drill with bearing

Technical field

The utility model provides a kind of micro drill that grinds with the automatic closing device of bearing, and particularly use bearing, and relate to the jaw that constitutes this bearing about a kind of blade location of putting micro drill to be ground, and in order to the roller and the cam of the described jaw of interlock.

Background technology

Micro drill is that a kind of drill bit blade diameter can be contracted to the Drilling cutter about about 0.1mm, be used in a large number on the bore operation of printed circuit board (PCB) at present, but this drill bit is through after repeatedly using, the most advanced and sophisticated abrasion easily of its blade damage, and make drill bit can't bear to use; In order to prolong the service life of drill bit, the practice of present stage is that the blade of the drill bit that will wear away utilizes a grinder to carry out processing grinding again, can be for the situation in the correct aperture of Drilling and the blade of this drill bit is replied.

At present, above-mentioned micro drill rocks when grinding for fear of its blade and to fracture when accepting this grinder and grind, to guarantee the grinding quality of drill bit, usually the blade of drill bit can be put in a location with bearing on, and shield and sustain this blade by the device of folding automatically on this bearing; And know, automatically the closing device of the bearing of tradition micro drill, mainly be to form a V-type groove at a pedestal top of this bearing, the blade of this drill bit is put in the V-type trench bottom, and utilize a rolled-up stock from top to bottom to embed this V-type groove, and this blade is positioned between V-type groove and the rolled-up stock, and be beneficial to this grinder this blade is carried out processing grinding.

Above-mentioned rolled-up stock generally is by solenoid actuated, and embeds this V-type groove with straight line path; Yet for the micro drill about the about 0.1mm of blade diameter, the practice of utilizing this rolled-up stock from top to bottom to suppress this blade with straight line path is shielded and sustain blade though can stablize; Only, when the blade diameter of source drill bit large and small when different, the central point of this V-type groove location blade to accept to grind, meeting upper and lower change with the blade of different diameter, cause blade to depart from the situation of the default central point of accepting grinding, and then influence the grinding quality of drill bit, need badly and improved.

Summary of the invention

The purpose of this utility model is, with the operating state between the folding member of bearing, convert the cycloid running to by the straight line running, and under the prerequisite that keeps the linear drives active force, shorten the shift motion between the folding member, keeping the location steadiness of drill bit blade, and the decelerating effect when having clamping, to avoid the blade of damaging; Simultaneously, adopt method of clamping location blade, to promote the setting accuracy of blade.

For realizing above-mentioned purpose, a kind of automatic closing device that grinds micro drill with bearing of the utility model is disposed on the pedestal of this bearing, comprises:

One first jaw has first articulated section of a hub setting on this pedestal, and this first articulated section bilateral forms one first claw and a first end respectively;

One roller of pawling, hub setting is on this first jaw between this first claw and this first articulated section;

One swing type cam is fixedly arranged on this first jaw between this first claw and this first articulated section;

One second jaw has one coaxially in second articulated section of this first articulated section, and this second articulated section bilateral forms one second claw and a second end respectively, and this second claw is positioned at the opposite end of this first claw;

One swing component, central hub setting are on this pedestal, and both-end is respectively equipped with one and pastes first pushed section of touching this swing type cam, and one pastes second pushed section of touching this second end; And

One rotary type cam, hub setting touch this roller of pawling in this roller nearside of pawling and paste.

By above-mentioned, push away via a straight line driving force and to touch this rotary type cam and rotate, and make this roller of pawling of rotary type cam drive, and order about the swing of this first claw and swing type cam, and via first, second pushed section interlock of this swing component, impel the swing of this second end and second claw, and then drive described first and second jaw unlatching and closed, with the blade of clamping and release drill bit.In view of the above, convert this linear drives power to the cycloid driving force by described rotary type cam, and by the described rotary type cam and the roller of pawling, and described swing type cam and swing component, function mode with cycloid drives described first and second jaw unlatching and closed, can be under the prerequisite that keeps the linear drives active force, shorten the shift motion between described first and second jaw, to keep the location steadiness of drill bit blade, and the decelerating effect when making described first and second jaw have clamping, to avoid the blade of damaging; Simultaneously, described first and second jaw adopts method of clamping location blade, to promote the setting accuracy of blade; In addition, also can omit the headspace of above-mentioned straight line path, and above-mentioned supply micro drill implants the headspace of bearing, and help the miniaturization design of bearing; In addition, this first jaw can be accepted the rotary type cam drive via the roller of pawling, and helps reducing the volume of first jaw, and further omits the configuration space of first jaw, will more help the miniaturization of bearing.Wherein, comprise more:

One first spring, be located between this pedestal and this first end, drive this first jaw swing, make this first claw away from this second claw, and this swing type cam pushes against this first pushed section and the swing of this swing component, this second pushed section pushes against this second end and the swing of this second jaw, makes this second claw away from this first claw;

One driver is located on this pedestal of this rotary type cam nearside opposite end, can produce this linear drives power, rotates to drive this rotary type cam, make this first jaw swing this first claw and shift to this second claw, and this swing type cam discharges this first pushed section; And

One second spring is located between this pedestal and this second claw, can drive this second jaw swing, make this second claw shift to this first claw, and this second end pushes against this second pushed section and this swing component is swung, and makes this first pushed section push against this swing type cam.

In addition, the another kind of automatic closing device that grinds micro drill with bearing of the utility model is disposed on the pedestal of this bearing, comprises:

One swing component, central hub setting are on this pedestal, and both-end is respectively equipped with one and pastes first pushed section of touching this swing type cam, and one pastes second pushed section of touching this second end;

One driver is located at the opposite end of this first claw side, can drive the swing of this first claw and this first jaw, make this first claw shift to this second claw, and this swing type cam discharges this first pushed section; And

One second spring is located between this pedestal and this second claw, can drive this second jaw swing, make this second claw shift to this first claw, and this second end pushes against this second pushed section and this swing component is swung, and makes this first pushed section push against this swing type cam.Wherein, comprise more:

One roller of pawling, hub setting is on this first jaw between this first claw and this first articulated section; And

One rotary type cam, hub setting is touched this roller of pawling and paste on this pedestal of this roller nearside of pawling, this driver is located at the opposite end of this rotary type cam nearside, can drive this rotary type cam and rotate, and this roller of pawling of transmission, this first claw and the swing of this first jaw.

Except that this, the utility model also comprises:

The spring power of described first spring is greater than the spring power of this second spring.

The distolateral hub setting of contiguous this driver of described rotary type cam has a stressed roller, can accept this driver pushing and pressing and release, and this rotary type cam is rotated; So, this rotary type cam can be accepted driver via stressed roller and touch, and will help reducing the volume of rotary type cam, and further omit the configuration space of rotary type cam.

Described driver is a cylinder, and disposes a slide block that is slidedly arranged on this pedestal on the cylinder bar of this cylinder, and this stressed roller is positioned on the mobile route of this slide block, can accept this slide block pushing and pressing and release, and this rotary type cam is rotated.

Form a pair of outer open storage tank between described first claw and this second claw, can ccontaining this drill bit.

Described swing type cam is pawled between roller and this first articulated section at this.

Described swing type cam has one and pastes the protruding end limit of touching this first pushed section.

Described the second end is between this swing type cam and this first articulated section.

Described first pushed section and this second pushed section are roller.

Described rotary type cam has one and pastes the protruding end limit of touching this roller of pawling.

The useful technique effect that the utility model reaches is: keep the location steadiness of drill bit blade, and the decelerating effect when having clamping, to avoid the blade of damaging; Simultaneously, adopt method of clamping location blade, to promote the setting accuracy of blade.

Yet, for can be clearly and fully disclose the utility model, and give the legend of enumerating preferable enforcement, to describe its embodiment in detail as described later:

Description of drawings

Fig. 1 is a stereogram of the present utility model;

Fig. 2 is the three-dimensional exploded view of Fig. 1;

Fig. 3 is the front view of Fig. 1;

Fig. 4 is the vertical view of Fig. 3;

Fig. 5 is the partial enlarged drawing of Fig. 3;

Fig. 6 is the user mode figure of Fig. 3;

Fig. 7 is the user mode figure of Fig. 5.

Description of reference numerals

1-first jaw; The 10-storage tank; 11-first articulated section; 12-first claw; The 13-first end; 2-second jaw; 21-second articulated section; 22-second claw; The 23-the second end; The 31-roller of pawling; The stressed roller of 32-; 41-swing type cam; 411,421-protruding end limit; 42-rotary type cam; The 5-swing component; The 50-axle center; 51-first pushed section; 52-second pushed section; 61-first spring; 62-second spring; 621,622-column; The 7-driver; 71-cylinder bar; The 72-slide block; The 721-inclined plane; The 8-bearing; The 80-pedestal; The 81-stopper slot; The 82-chute; The 83-groove; The 9-drill bit; The 91-blade.

The specific embodiment

First sight is shown in Figure 1, disclose the utility model and grind the stereogram of micro drill with the automatic closing device of bearing, and cooperate Fig. 2 that first item embodiment of the present utility model is described, on a pedestal 80 sides of this bearing 8, configuration comprises one first jaw 1, pawl roller 31, a swing type cam 41, one second jaw 2, a swing component 5 and a rotary type cam 42, and the blade 91 of micro drill to be ground 9 can be put and locate to this bearing; This first jaw 1 can be plate-like (as Fig. 3 and shown in Figure 5), have first articulated section 11 of a hub setting in pedestal 80 sides, these first articulated section, 11 bilaterals form one first claw 12 and a first end 13 respectively, this first claw 12 prolongs system by first jaw, 1 top towards the side of pedestal 80 sides and forms, and this first end 13 is positioned at first jaw, 1 bottom, one side.This pawls roller 31 hub settings on first jaw, 1 inner surface between first claw 12 and first articulated section 11, and between pedestal 80 sides and first jaw 1, this roller 31 of pawling can freely rotate, and can rotate and swing along with first jaw 1.

This swing type cam 41 is fixedly arranged on first jaw, 1 outer surface between first claw 12 and first articulated section 11 (as shown in Figures 2 and 3), and swing type cam 41 can pawled between the roller 31 and first articulated section 11 in this enforcement.This second jaw 2 can be strip, and second jaw 2 has one coaxially in second articulated section 21 (as shown in Figure 1) of first articulated section 11, and make 2 hub settings of second jaw on first jaw 1, and then hub setting is in pedestal 80 sides; In fact, this first articulated section 11 can be an axis hole, and this second articulated section 21 can be an axostylus axostyle, but and the axostylus axostyle hub setting in axis hole; These second articulated section, 21 bilaterals form one second claw 22 and a second end 23 (as shown in Figure 5) respectively, this second claw 22 prolongs system by second jaw, 2 tops towards the side of pedestal 80 sides and forms, this the second end 23 is positioned at second jaw, 2 bottoms, one side, and extend between this swing type cam 41 and first articulated section 11, and second claw 22 is positioned at the opposite end of first claw 12.

These pedestal 80 tops form one and utilize micro drill 9 to implant the groove 83 (as Fig. 1, Fig. 2 and shown in Figure 4) of bearing 8, form a pair of outer open storage tank 10 between this first claw 12 and second claw 22, this storage tank 10 can be opened above pedestal 80 in this enforcement, and be communicated with this groove 83, can ccontaining described micro drill 9, and the bilateral inwall of storage tank 10 is the side profile of drill bit.

This swing component 5 can be subtriangular profile (as Fig. 1 and shown in Figure 3), and swing component 5 central hub settings are on pedestal 80 sides, and be respectively equipped with one in swing component 5 both-ends and paste first pushed section 51 touch swing type cam 41, reach one and paste second pushed section 52 of touching the second end 23, and swing type cam 41 has the protruding end limit 411 (as Fig. 2 and shown in Figure 5) that first pushed section 51 is touched in subsides; In this enforcement, this first pushed section 51 and second pushed section 52 are roller, and from top to bottom shrink gradually on the protruding end limit 411 of this swing type cam 41, and the straight line path between first pushed section 51 and second pushed section 52 is departed from an axle center 50 of swing component 5.42 hub settings of rotary type cam are touched this roller 31 of pawling in roller 31 nearsides of pawling and paste, and rotary type cam 42 has the protruding end limit 421 that the roller 31 of pawling is touched in subsides; In this enforcement, from bottom to top shrink gradually on the protruding end limit 421 of this rotary type cam 42.

In addition, on another concrete enforcement, described pedestal 80 sides also can be arranged with and be formed with a stopper slot 81 (as shown in Figure 1 to Figure 3), and stopper slot 81 is open towards the side of pedestal 80 sides, and described first jaw 1, second jaw 2, swing component 5 and rotary type cam 42 are also configurable in this stopper slot 81; This stopper slot 81 also can be connected with groove 83.

The utility model includes one first spring 61, a driver 7 and one second spring 62 more; This first spring 61 is located between pedestal 80 sides and the first end 13 (as shown in Figures 2 and 3), also can be packed between stopper slot 81 inwalls and first end 13 of this pedestal 80, cause first spring 61 can drive this first jaw, 1 swing (as shown in Figure 5), cause this first claw 12 with the swing of first jaw 1 away from second claw 22, and the protruding end limit 411 of swing type cam 41 also pushes against first pushed section 51 downwards with 1 swing of first jaw and moves down, to order about this swing component 5 swings, cause second pushed section 52 to push against the second end 23 of second jaw 2 upward with swing component 5 swings, to order about 2 swings of second jaw, impel second claw 22 away from first claw 12, to make first and second jaw 1 with 2 swings of second jaw, 2 open.

This driver 7 is located on pedestal 80 sides of rotary type cam 42 nearside opposite ends (as shown in Figure 1 to Figure 3), in this enforcement, this driver 7 can be a cylinder, and dispose a slide block 72 that is slidedly arranged on pedestal 80 sides on the cylinder bar 71 of cylinder, and in distolateral formation one inclined plane 721 of slide block 72 contiguous rotary type cams 42; On another concrete enforcement, this slide block 72 also can be slidedly arranged in the chute 82 of pedestal 80 sides, and this chute 82 is connected with stopper slot 81, and rotary type cam 42 contiguous chutes 82; So, this driver 7 can produce a straight line driving force, push away via the inclined plane 721 of slide block 72 and to touch and this rotary type cam 42 (as Figure 6 and Figure 7) of transmission, rotate to drive rotary type cam 42, cause this protruding end limit 421 to rotate with rotary type cam 42 and move on the roller 31 of pawling upward, to order about this first jaw, 1 swing, this first claw 12 is shifted to second claw 22 with 1 swing of first jaw, this first end 13 compresses this first spring 61 with 1 swing of first jaw, and swing type cam 41 and protruding end limit 411 are moved on the swing of first jaw 1, to discharge this first pushed section 51.

In another concrete enforcement, but the distolateral also hub setting one stressed roller 32 (as shown in Figure 1 to Figure 3) of these rotary type cam 42 contiguous drivers 7, and stressed roller 32 can be exposed to the position that stopper slot 81 is connected with chute 82, and is positioned on the mobile route on inclined plane 721 of slide block 72; So, this stressed roller 32 can be accepted driver 7 and drive slide block 72 pushing and pressing and discharge (as Fig. 5 and shown in Figure 7), rotates and order about rotary type cam 42.

This second spring 62 is located between pedestal 80 sides and second claw 22 (as Fig. 4 and shown in Figure 5); In this enforcement, pedestal 80 sides between this rotary type cam 42 and first jaw 1 are installed with a column 621 (as shown in Figure 1 to Figure 3), and the position of second jaw, 2 contiguous second claws 22 is installed with another column 622, this second spring 62 is connected between described two columns 621,622, is located on this second jaw 2 and stride; So, this second spring 62 can drive 2 swings (as shown in Figure 7) of second jaw, cause second claw 22 to shift to first claw 12 with 2 swings of second jaw, and the second end 23 pushes against second pushed section 52 downwards with 2 swings of second jaw, to order about this swing component 5 swings, cause first pushed section 51 to push against this swing type cam 41 upward with swing component 5 swings.

Wherein, the spring power of this first spring 61 is greater than the spring power of second spring 62, therefore, do not touch at driver 7 under the situation of rotary type cam 42 (as shown in Figure 5), this first and

second jaw

1,2 is opening, touched under the situation that rotary type cam 42 rotates (as shown in Figure 7) at driver 7 in addition, this first and

second jaw

1,2 is closure state.

Form according to above-mentioned member, but sacrificial vessel, before implanting bearing 8, transfer micro drill 9 moves (as shown in Figure 3) on these driver 7 driving slide blocks 72, and discharges this stressed roller 32 and rotary type cam 42 to implement the utility model; At this moment, this first spring 61 overcomes the spring power of second spring 62, swing and drive first jaw 1, make first claw 12 away from second claw 22 (as shown in Figure 5), and 411 pushing and pressing first pushed sections 51, protruding end limit of swing type cam 41 and swing component 5 swings, order about second pushed section, 52 pushing and pressing the

second ends

23 and 2 swings of second jaw, impel second claw 22, make first and

second jaw

1,2 open away from first claw 12.

Implant first and second claw 12 of bearing 8 via groove 83 transfers when micro drill 9, between 22 (as shown in Figure 4), and when being positioned at this storage tank 10, this driver 7 drives slide block 72 and moves down (as shown in Figure 6), touch this stressed roller 32 (as shown in Figure 7) and push away downwards, and overcome the spring power of first spring 61, accept slide block 72 with stressed roller 32 and push away and touch and swing to order about rotary type cam 42, cause protruding end limit 421 transmissions of rotary type cam 42 roller 31 of pawling, first jaw 1,

first claw

12 and 41 swings of swing type cam, and make first claw 12 shift to second claw 22, and swing type cam 41 discharges first pushed section 51; At this moment, because first pushed section 51 of swing component 5 loses the backstop of swing type cam 41, and make second pushed section 52 discharge the second end 23, cause second spring 62 to drive 2 swings of second jaw immediately, order about second claw 22 and shift to first claw 12, make first and

second jaw

1,2 closures,, be beneficial to the extraneous grinder of these blade 91 acceptance and carry out processing grinding with the blade 91 of shielding and sustain and locating this drill bit 9; Simultaneously, the second end 23 pushing and pressing second pushed sections 52 and swing component 5 swings impel first pushed section, 51 pushing and pressing swing type cams 41.When blade 91 grindings of drill bit 9 finished, this driver 7 drove on slide blocks 72 and moves (as Fig. 3 and shown in Figure 5), and first and

second jaw

1,2 is opened, to discharge the blade 91 of drill bit 9.

By above-mentioned, try hard to recommend via the linear drives of driver 7 and to touch rotary type cam 42 and rotate, and make the rotary type cam 42 transmissions roller 31 of pawling, and order about 41 swings of first claw 12 and swing type cam, and via first, second pushed section 51,52 interlocks of swing component 5, impel the second end 23 and 22 swings of second claw, and then drive described first and second jaw 1,2 unlatchings and closed, to shield and sustain and to discharge the blade 91 of drill bit 9.In view of the above, convert the linear drives power of driver 7 to the cycloid driving force by described rotary type cam 42, and by the described rotary type cam 42 and the roller 31 of pawling, and described swing type cam 41 and swing component 5, function mode with cycloid drives described first and second jaw 1,2 open and closure, can be under the prerequisite that keeps this linear drives active force, shorten described first and second jaw 1, shift motion between 2, to keep the location steadiness of drill bit 9 blades 91, and make described first and second jaw 1,2 decelerating effects when having clamping are to avoid the blade 91 of damaging; Simultaneously, described first and second jaw 1,2 adopts method of clamping location blade 91, to promote the setting accuracy of blade 91; In addition, also can omit the headspace of above-mentioned straight line path, and above-mentioned supply micro drill 9 implants the headspace of bearings 8, and help the miniaturization design of bearing 8; In addition, this first jaw 1 can be accepted 42 transmissions of rotary type cam via the roller 31 of pawling, and helps reducing the volume of first jaw 1, and further omits the configuration space of first jaw 1; This rotary type cam 42 can be accepted driver 7 via stressed roller 32 and touch, and helps reducing the volume of rotary type cam 42, and further omits the configuration space of rotary type cam 42; So, the miniaturization of bearing will more be helped.

See also shown in Figure 1, second section of embodiment of the present utility model is described, on a pedestal 80 sides of this bearing 8, configuration comprises one first jaw 1, a swing type cam 41, one second jaw 2, a swing component 5, one first spring 61, a driver 7 and one second spring 62; This first jaw 1 has first articulated section 11 (as shown in Figures 2 and 3) of a hub setting on pedestal 80 sides, and these first articulated section, 11 bilaterals form one first claw 12 and a first end 13 (as shown in Figure 4) respectively; This swing type cam 41 is fixedly arranged on first jaw 1 between first claw 12 and first articulated section 11 (as shown in Figure 5); It is one coaxial in second articulated section 21 of first articulated section 11 that this second jaw 2 has, and these second articulated section, 21 bilaterals form one second claw 22 and a second end 23 respectively, and this second claw 22 is positioned at the opposite end of first claw 12; These swing component 5 central hub settings are on pedestal 80 sides, and both-end is respectively equipped with one and pastes first pushed section 51 of touching swing type cam 41, and one pastes second pushed section 52 of touching the second end 23; This first spring 61 is located between pedestal 80 sides and the first end 13, drive 1 swing of first jaw, make first claw 12 away from second claw 22, and swing type cam 41 pushing and pressing first pushed sections 51 and swing component 5 swings, these second pushed section, 52 pushing and pressing the second ends 23 and 2 swings of second jaw make second claw 22 away from first claw 12.

This driver 7 is located at the opposite end (as shown in Figure 1 to Figure 3) of first claw, 12 sides, can drive

first claw

12 and 1 swing (as Figure 6 and Figure 7) of first jaw, make first claw 12 shift to second claw 22, and swing type cam 41 discharges first pushed section 51; This second spring 62 is located between pedestal 80 sides and second claw 22, can drive 2 swings of second jaw, make second claw 22 shift to first claw 12, and the second end 23 pushing and pressing second pushed sections 52 and swing component 5 swings, make first pushed section, 51 pushing and pressing swing type cams 41.Wherein, hub setting one roller 31 (as shown in Figure 5) of pawling on first jaw 1 between this first claw 12 and first articulated section 11, and hub setting one rotary type cam 42 on pedestal 80 sides of roller 31 nearsides of pawling, touch the roller 31 of pawling and paste, this driver 7 is located at the opposite end of rotary type cam 42 nearsides, can drive rotary type cam 42 and rotate, and transmission pawl roller 31,

first claw

12 and 1 swing of first jaw, all the other members are formed and embodiment is equal to above-mentioned first item embodiment.

More than explanation is just illustrative for the utility model; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited; can make many modifications, variation or equivalence, but all will fall within the protection domain of the present utility model.

Claims

1. an automatic closing device that grinds micro drill with bearing is disposed on the pedestal of this bearing, it is characterized in that including:

One rotary type cam, hub setting is in this roller nearside of pawling, touch this roller of pawling and paste, via rotating this rotary type cam, and this roller of pawling of transmission, first claw and the swing of swing type cam, and, make the swing of this second end and second claw via this first, second pushed section interlock, with the blade of clamping and release drill bit.

2. according to the automatic closing device of the described grinding micro drill of claim 1, it is characterized in that comprising more with bearing:

One driver is located on this pedestal of this rotary type cam nearside opposite end, can drive this rotary type cam and rotate, and make this first jaw swing this first claw and shift to this second claw, and this swing type cam discharges this first pushed section; And

3. an automatic closing device that grinds micro drill with bearing is disposed on the pedestal of this bearing, it is characterized in that including:

4. according to the automatic closing device of the described grinding micro drill of claim 3, it is characterized in that comprising more with bearing:

5. according to the automatic closing device of claim 2 or 3 described grinding micro drills usefulness bearings, it is characterized in that: the spring power of described first spring is greater than the spring power of this second spring.

6. according to claim 2 or 4 described grinding micro drills automatic closing device with bearings, it is characterized in that: the distolateral hub setting of contiguous this driver of described rotary type cam has a stressed roller, can accept this driver pushing and pressing and release, and this rotary type cam is rotated.

7. according to the automatic closing device of the described grinding micro drill of claim 6 with bearing, it is characterized in that: described driver is a cylinder, and dispose a slide block that is slidedly arranged on this pedestal on the cylinder bar of this cylinder, this stressed roller is positioned on the mobile route of this slide block, can accept this slide block pushing and pressing and release, and this rotary type cam is rotated.

8. according to the automatic closing device of claim 1 or 3 described grinding micro drills usefulness bearings, it is characterized in that: form a pair of outer open storage tank between described first claw and this second claw, can ccontaining this drill bit.

9. according to the automatic closing device of claim 1 or 4 described grinding micro drills usefulness bearings, it is characterized in that: described swing type cam is pawled between roller and this first articulated section at this.

10. according to the automatic closing device of claim 1 or 3 described grinding micro drills usefulness bearings, it is characterized in that: described swing type cam has one and pastes the protruding end limit of touching this first pushed section.

11. according to the automatic closing device of claim 1 or 3 described grinding micro drills usefulness bearings, it is characterized in that: described the second end is between this swing type cam and this first articulated section.

12. according to the automatic closing device of claim 1 or 3 described grinding micro drills usefulness bearings, it is characterized in that: described first pushed section and this second pushed section are roller.

13. the automatic closing device according to claim 1 or 4 described grinding micro drills usefulness bearings is characterized in that: described rotary type cam has one and pastes the protruding end limit of touching this roller of pawling.