CN105336345B - Magnetic head loading system power test equipment - Google Patents
Magnetic head loading system power test equipment Download PDFInfo
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- CN105336345B CN105336345B CN201410385326.0A CN201410385326A CN105336345B CN 105336345 B CN105336345 B CN 105336345B CN 201410385326 A CN201410385326 A CN 201410385326A CN 105336345 B CN105336345 B CN 105336345B
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- magnetic head
- system power
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Abstract
The invention discloses a kind of magnetic head loading system power test equipments, it includes magnetic-head positioning construction, partition and Weighing mechanism, the Weighing mechanism includes multiple disc weighing units, each disc weighing unit includes a disc and one for measuring the electronic scale for the magnetic head loading system power being mounted on the disc, and the disc of each disc weighing unit is sequentially overlapped to form a comb teeth-shaped.Magnetic head loading system power test equipment of the invention by the way that multiple disc weighing units are arranged so that the magnetic head loading system power test equipment can one magnetic head of disposable test multiple heads to reducing equipment cost, improve testing efficiency.
Description
Technical field
The present invention relates to computer hard disc field more particularly to a kind of magnetic head loading system power test equipments.
Background technique
Hard disk is the primary outer storage medium of computer, using magnetic head come the data on reading writing harddisk.At hard disk
When working condition, hard disc rapidly rotates, and the rocker piece on magnetic head is in state of flight, and generates sky in air supporting surface
Gas support force, generally, by its elastic arm, the pre-add elastic force on rocker piece balances the size of the air support force to magnetic head,
So that air supporting surface is kept the effect of predetermined altitude relative to disc, is provided safeguard for magnetic head read-write capability.The bullet of above-mentioned pre-add
Property power is referred to as the loading force of magnetic head, and the equipment for testing the power size is referred to as magnetic head loading system power test equipment.Currently, in the market
Magnetic head loading system power test equipment, as illustrated in figs. 1A and ib, the magnetic head loading system power test equipment 100 include disc fixing seat
101, disc 102, locating shaft 103 and separation needle assemblies 104.One end of magnetic head 105 is fixed on locating shaft 103, containing multiple
Head suspension assembly 106(Head Gimbal Assembly, HGA) the other end then separated by separation needle assemblies 104, wherein
HGA 106 includes rocker piece 106a, elastic arm 106b and limiter 106c(lif-tab).The magnetic head loading system power test equipment 100
Working principle it is as follows: after magnetic head 105 positions on locating shaft 103, separate needle assemblies 104 HGA is separated, HGA 106 enter
To disc 102, then separates needle assemblies 104 and rotate one by one, test the loading force size of each HGA 106.More specifically, such as
Shown in Fig. 1 a, the magnetic head of magnetic head loading system power test equipment 100 is in segmented state, the rocker piece 106a of the HGA 106 of magnetic head 105
It is not contacted with disc 102.As shown in Figure 1 b, the magnetic head of magnetic head loading system power test equipment 100 is in test mode, is located at most lower
The separation needle assemblies 104 in face have been rotated by 90 °, at this point, the rocker piece 106a positioned at nethermost HGA 106 touches disc 102,
Nethermost HGA 106 is in test mode.After completing the nethermost test of HGA 106, it is located at nethermost separation needle assemblies
104 spinning reductions, then, second separation needle assemblies 104 disposed thereon are rotated by 90 °, and HGA's 106 corresponding thereto is floating
Motion block 106a is contacted with disc 102, completes test, repeats above-mentioned movement, completes the test of all HGA 106 on magnetic head 105.
However, said head loading force test equipment 100 can only test 1 HGA every time, efficiency is very low, machine at
This and human cost are high.
Summary of the invention
It is an object of the invention to solve magnetic head loading system power test equipment in the prior art can only test every time 1 HGA,
Inefficiency, machine cost and the high technical problem of human cost, and a kind of magnetic that can once complete multiple HGA tests is provided
Head loading force test equipment.
The present invention proposes a kind of magnetic head loading system power test equipment, for measuring magnetic head loading system power comprising magnetic head localization machine
Structure, partition and Weighing mechanism, the Weighing mechanism include multiple disc weighing units, and each disc weighing unit includes one
Disc and one is for measuring the electronic scale for the magnetic head loading system power being mounted on the disc, and the disc of each disc weighing unit is successively
Superposition forms a comb teeth-shaped.
The magnetic head loading system power test equipment, the disc weighing unit further include a fixing seat and column, the disk
Piece is fixed on the fixing seat by the column, and the fixing seat is mounted on the sensor of the electronic scale.
The magnetic head loading system power test equipment, each disc include a coiled hair being mounted on the column and by described
To disk tooth in elongate shape made of horizontal extension, the disk tooth of each disc is sequentially overlapped to form the comb teeth for one side of coiled hair
Shape.
The magnetic head loading system power test equipment, the partition include two set isolation units, each set isolation unit
It include multiple separation needles, and the separation needle in same group is arranged in column, and the separation needle between different groups is embarked on journey arrangement.
The magnetic head loading system power test equipment, the two set isolations unit is connected with a cylinder respectively, in the drive of cylinder
Under dynamic, wherein a set isolation unit moves upwards, another set isolation unit is moved downward.
The magnetic head loading system power test equipment, the magnetic-head positioning construction include positioning component, spinning component and clamping
Magnetic head is located on the base assembly of magnetic head loading system power test equipment by component, the positioning component, and the spinning component is perpendicular
Histogram positions the magnetic head upwards, and the clamping component positions the magnetic head in the horizontal direction.
The magnetic head loading system power test equipment, the positioning component include a cylinder table and are mounted on the cylinder table
Locating shaft, the locating shaft matched with the bearing location hole of the magnetic head with by the magnetic head on the cylinder table.
The magnetic head loading system power test equipment, the spinning component include a driving device and one by the driving device
The pressure head to move up and down is driven, the pressure head compresses the magnetic head from the top of the positioning component.
The magnetic head loading system power test equipment, the clamping component include one be fixedly clamped seat, be mounted on the clamping
Cylinder, the base of the carrier head moved horizontally under cylinder driving in fixing seat and the collet being mounted on the base of the carrier head,
Detent fit on the collet and the base assembly to position the magnetic head in the horizontal direction.
The magnetic head loading system power test equipment, the magnetic head loading system power test equipment further include moving back comb teeth component, one
Upper comb dent component and a support comb teeth component, the comb teeth component and upper comb dent component mutual cooperation of moving back on magnetic head will be set with
For protecting the comb teeth of magnetic head to back out or load onto from magnetic head, the support comb teeth component is used to lift the comb teeth backed out.
Compared with prior art, the invention has the following beneficial effects:
Magnetic head loading system power test equipment of the invention is by being arranged multiple disc weighing units, so that the magnetic head loading system power is surveyed
Try equipment can the multiple HGA of disposable test, reduce and equipment cost and improve testing efficiency.
Detailed description of the invention
Fig. 1 a is the structural schematic diagram that magnetic head loading system power test equipment is in segmented state in the prior art.
Fig. 1 b is the structural schematic diagram that magnetic head loading system power test equipment is in test mode in the prior art.
Fig. 2 is the assembly explosive view of magnetic head loading system power test equipment of the present invention.
Fig. 3 is the structural schematic diagram after magnetic head loading system power test equipment of the present invention assembly.
Fig. 4 is the structural schematic diagram of magnetic head loading system power test equipment Weighing mechanism of the present invention.
Fig. 5 is the structural schematic diagram of magnetic head loading system power test equipment partition of the present invention.
Fig. 6 is the partial enlarged view in Fig. 2 at A.
Fig. 7 is the structural schematic diagram of magnetic head loading system power test equipment clamping component and upper comb dent component of the present invention.
Fig. 8 is the structural schematic diagram that magnetic head loading system power test equipment of the present invention moves back comb teeth component.
Fig. 9 is the structural schematic diagram of magnetic head loading system power test equipment support comb teeth component of the present invention.
Figure 10 is the work flow diagram of magnetic head loading system power test equipment of the present invention.
Specific embodiment
Principle and structure in order to further illustrate the present invention carry out the preferred embodiment of the present invention now in conjunction with attached drawing detailed
It describes in detail bright.
Fig. 2 and Fig. 3 are please referred to, Fig. 2 is the assembly explosive view of magnetic head loading system power test equipment of the present invention, and Fig. 3 is the present invention
Structural schematic diagram after the assembly of magnetic head loading system power test equipment.Magnetic head loading system power test equipment of the present invention include a base assembly 1,
The Weighing mechanism 2 that is mounted on the base assembly 1, magnetic-head positioning construction 4, moves back comb teeth component 5, upper comb dent component at partition 3
6 and the support comb teeth component 7 for lifting comb teeth.
Base assembly 1 include one have opening back box 11 and one cover the back box 11 bottom plate 12, above-mentioned each component and
Mechanism is mounted in the back box 11, and the bottom plate 12 stretches out in those components and mechanism, is worked in the top of bottom plate 12.
Referring to Fig. 4, it is the structural schematic diagram of magnetic head loading system power test equipment Weighing mechanism of the present invention.Weighing mechanism 2
Including a mounting box 21 and multiple disc weighing units 22.The mounting box 21 has an opening, the lower end of disc weighing unit 22
It is fixed in the mounting box 21, the mounting box 21 is stretched out in upper end.Each disc weighing unit 22 includes that a fixing seat 221, one is vertical
Column 222, a disc 223 and one are mounted in mounting box 21 for measuring the electricity of the loading force for the magnetic head being mounted on disc 223
Son claims (not shown).Fixing seat 221 is fixed in mounting box 21, and column 222 is fixed in fixing seat 221, and disc 223 passes through vertical
Column 222 is fixed in fixing seat 221.In the present embodiment, which includes 6 disc weighing units 22, those discs claim
The fixing seat 221 of weight unit 22 is arranged in two rows two column.The disc 223 of each disc weighing unit 22 from bottom to up successively arrange by interval
Column, and each disc 223 includes a tool there are two the coiled hair 2232 in hole and is extended horizontally outward by the side of the coiled hair 2232
Disk tooth 2231 in elongate shape.Each coiled hair 2232 is fixed on column 222 by fastener, and each disk tooth 2231 is sequentially overlapped shape
At a comb teeth-shaped, and the distance between the distance between comb teeth and each HGA of magnetic head are adapted.The corresponding fixing seat of each disc 223
Electronic scale of the 221 lower section setting one for claiming to be mounted in weight of object on disc 223, the electronic scale include buckling formula sensing
Device, control unit and display unit, the buckling formula sensor are located at the lower section of the fixing seat 221.Here, the sensor of electronic scale
It is not limited to buckling formula sensor, it can also be with resistance-strain type, photo-electric, piezomagnetic, piezoelectric type, fluid pressure type, condenser type, vibration
The other sensors such as dynamic formula.
Referring to Fig. 5, it is the structural schematic diagram of magnetic head loading system power test equipment partition of the present invention.Partition 3
Including a fixing seat 31, the cylinder 33 for separating needle assemblies 32 and driving separation needle assemblies 32 and moving being mounted in fixing seat 31.
Separate needle assemblies 32 and includes two set isolation units, respectively the first set isolation unit 321 and the second set isolation unit 322, it is each
Set isolation unit includes multiple separation needles, and the separation needle in same group is arranged in column, and the separation needle between different groups is embarked on journey
Arrangement.First set isolation unit 321 and the second set isolation unit 322 are driven by corresponding cylinder 33 respectively, and two components
Opposite every the direction of motion of unit, for example, the first set isolation unit 321 moves upwards, then the second set isolation unit 322 to
Lower movement.
Please refer to Fig. 1, Fig. 6 and Fig. 7, magnetic-head positioning construction includes spinning component 41, positioning component 42 and clamping group
Part 43.Spinning component 41 includes a housing 411, and a driving device is installed in housing 411, in the lower section of housing 411 installation one with
The connected pressure head 412 of driving device, under the drive of the drive, pressure head 412 moves up and down in the vertical direction.
As shown in fig. 6, positioning component 42 is fixed on cylinder table 421 stepped on bottom plate 12 including one and is mounted on circle
Locating shaft 422 on pylon 421, locating shaft 422 matched with the bearing location hole of magnetic head with by magnetic head on cylinder table 421.
In addition, being provided with the positioning pin 44 for preventing magnetic head from rotating in the horizontal direction on the bottom plate 12 close to positioning component 42 and preventing
The spacer pin 45 of artificial incorrect operation, the positioning pin 44 are also used to cooperate with clamping component 43 to realize that magnetic head is in the horizontal direction fixed
Position.
As shown in fig. 7, clamping component 43 include one be fixedly clamped seat 431, be mounted on the cylinder being fixedly clamped on seat 431
434, the base of the carrier head 432 moved horizontally under the driving of cylinder 434 and the collet 433 being mounted on base of the carrier head 432.Collet 433
In a T font structure, there is an inclined-plane, the positioning pin 44 on the inclined-plane and bottom plate 12 is abutted against to clamp and be located at locating shaft
Magnetic head on 422.
Upper comb dent component 6 is mounted on being fixedly clamped on seat 431 of clamping component 43, the fixing seat 62 by a fixing seat 62
Left end one cylinder 61 is installed, right end installs a upper comb dent mounting plate 63, fixes a L-type connecting plate on the upper comb dent mounting plate 63
64, a T font fixing seat 65 is fixed on the top of the connecting plate 64, there is a cavity in T font fixing seat 65, set in the cavity
A spring 66 is set, which is used to that vertical plate 67 to be pushed to abut the comb teeth being socketed on HGA, and is located at the water of 67 top of vertical plate
Plate 68 prevents comb teeth courbette from coming for pushing down comb teeth.
Referring to Fig. 8, its structural schematic diagram for moving back comb teeth component for magnetic head loading system power test equipment of the present invention.Move back comb group
Part 5 includes a fixing seat 51 and the pin shaft 52 for moving back comb teeth.This moves back comb teeth component 5 and upper comb dent component 6 with the use of completion
Magnetic head loading system power test equipment moves back comb teeth movement and dress comb teeth movement.
Referring to Fig. 9, it is the structural schematic diagram of magnetic head loading system power test equipment support comb teeth component of the present invention.Hold in the palm comb group
Part 7 include a fixing seat 74, one along the sliding block 75 that fixing seat 74 moves, the mounting base 72 being mounted on sliding block 75, be mounted on
The supporting plate 71 for filling the L-type support 75 on seat 72 and being mounted on 75 top of L-type support.Gas-tpe fitting 73 connects with a cylinder,
Cylinder driving sliding block 75 is slided up and down along fixing seat 74.
Referring to Fig. 10, it is the work flow diagram of magnetic head loading system power test equipment of the present invention.Below in conjunction with Fig. 2 to Figure 10
Illustrate the course of work of magnetic head loading system power test equipment of the present invention.
Before the course of work for illustrating the magnetic head loading system power test equipment, the structure of magnetic head under first general description.Generally
, magnetic head (head stack assembly, HSA) includes bearing, bogie and the head gimbals for being mounted on the bogie end
Component (Head Gimbal Assembly, HGA), wherein HGA is equipped with rocker piece, elastic arm and limiter (lif-tab).
Magnetic head includes multiple HGA, and to facing upward or downward, (it is head to upward that rocker piece is located above elastic arm to the head of HGA, and rocker piece is located at
Be head below elastic arm to downward), and head to upward HGA and head be successively alternately arranged to HGA directed downwardly.In other words, magnetic
Head can have multiple heads to.
Firstly, preparing the magnetic head that need to be tested.Because in the present embodiment, magnetic head include 12 HGA(wherein 6 HGA to court
On, another 6 HGA head is to downward), therefore, herein according to magnetic head to the quantity of (or HGA), by magnetic head loading system power test equipment
Disc quantity be set as 6.
Second step positions magnetic head.The bearing location hole of magnetic head is passed through into the locating shaft 422 of positioning component 42 and is located in bottom
On plate 12, positioning pin 44 stops magnetic head so that it will not which excessive rotation occurs, after the substantially positioning for completing magnetic head, spinning component 41
Pressure head 412 moves downward under the action of driving device, and pressure head 412 pushes down magnetic head from top, and clamping component 43 is made in cylinder 434
Collet 433 is set gradually to approach magnetic head in the horizontal direction under, until the inclined-plane of collet 433 abuts the positioning pin on bottom plate 12
44, realize upper positioning magnetic head from horizontal direction.It can prevent magnetic head from doing upper and lower, left and right, rotary motion by above-mentioned positioning mechanism, into
And realize the precise positioning of magnetic head.
Third step, after magnetic head positioning, partition 3 enters the HGA of magnetic head.
4th step, support comb teeth component 7 is in place.Hold in the palm comb teeth component 7 in the presence of cylinder, movement in place, and holds socket
Comb teeth on HGA.
5th step, moves back comb teeth.Upper comb dent component 6 is moved to scheduled first position under the action of cylinder 61；Separation machine
The the first set isolation unit 321 and the second set isolation unit 322 of structure 3 its correspond to cylinder under the action of, move up respectively and
It moves down, HGA is opened；It is mobile in place to move back comb teeth component 5, and pin shaft 52 is made to push comb teeth mobile, until comb teeth abuts
When the vertical plate 67 of comb teeth component 6, comb teeth stops movement, at this point, comb teeth has moved a distance, comb teeth is backed out from magnetic head,
In addition, the level board 68 for the upper comb dent component 6 being located above comb teeth is for preventing comb teeth from bouncing.
6th step, the test of magnetic head loading system power.After comb teeth movement is moved back in completion, at this point, HGA has been opened, the of partition 3
One set isolation unit 321 has moved up a distance, and the second set isolation unit 322 has moved down a distance.Under such state, into
The test of row loading force makes head to upward firstly, the first set isolation unit 321 of partition 3 moves up a distance again
The lif-tab of HGA be mounted on disc, disposably complete all heads and tested to the loading force of HGA upward, after testing,
First set isolation unit 321 moves down, and all heads are resetted to HGA upward, then, the second set isolation list of partition 3
Member 322 moves a distance still further below, is mounted in head on disc to the lif-tab of HGA directed downwardly, disposably completes all heads
It is tested to the loading force of HGA directed downwardly, after testing, the second set isolation unit 321 is moved up, and all heads are to HGA directed downwardly
It resets.
7th step fills comb teeth.Move back comb teeth component 5 and be retracted into initial position, upper comb dent component 6 under the action of cylinder 61,
It is moved to the second position, and comb teeth is pushed to reinstall it to HGA.
8th step, support comb teeth component 7 reset, that is, the initial position before being retracted into equipment work.
9th step, HGA reset.Partition 3 exits HGA, and HGA is restored to pretest condition, meanwhile, upper comb dent component 6
Initial position before being retracted into equipment work.
Step 10, positioning mechanism 2 reset.43 level of clamping component is retracted into the initial position before equipment work, spinning group
Part 41 rises to initial position.
Step 11 removes magnetic head from the locating shaft 422 of positioning component 42.
According to above-mentioned steps, the loading force test of all HGA of magnetic head is completed.
Above-mentioned Weighing mechanism has 6 discs, and but it is not limited to this, and the disc quantity of the Weighing mechanism can be according to practical magnetic
Head carries out appropriate adjustment to the quantity of (or HGA).
Above-mentioned partition has two set isolation units, and every set isolation unit is respectively provided with 6 separation needles, every set isolation
The quantity of unit should be equal with the quantity of Weighing mechanism disc, in addition, the separation needle quantity of the partition be it is transformable,
Adjustment appropriate can be carried out according to the quantity of disc.
Magnetic head loading system power test equipment of the invention is by being arranged multiple disc weighing units, so that the magnetic head loading system power is surveyed
Try equipment can the multiple HGA of disposable test (or multiple magnetic heads to), reduce equipment cost, improve testing efficiency.In addition,
The magnetic head loading system power test equipment disposably completes all heads to after HGA test upward, and can disposably complete to own
Head to HGA directed downwardly test, can be completed in two times all heads of magnetic head to HGA test.
The above is only preferable possible embodiments of the invention, not limit the scope of the invention, all with the present invention
The variation of equivalent structure made by specification and accompanying drawing content, is included within the scope of protection of the present invention.
Claims (8)
1. a kind of magnetic head loading system power test equipment, for measuring magnetic head loading system power, which is characterized in that including magnetic-head positioning construction,
Partition and Weighing mechanism, the Weighing mechanism include multiple disc weighing units, and each disc weighing unit includes a disk
Piece and one for measuring the electronic scale for the magnetic head loading system power being mounted on the disc, successively fold by the disc of each disc weighing unit
Add to form a comb teeth-shaped；
The partition includes two set isolation units, and each set isolation unit includes multiple separation needles, and in same group
Separating needle to arrange in column, the separation needle between different groups is embarked on journey arrangement, and the two set isolations unit is connected with a cylinder respectively,
Under the driving of cylinder, wherein a set isolation unit moves upwards, another set isolation unit is moved downward, disposably to complete institute
There is head to test to the loading force of the HGA faced upward or downward.
2. magnetic head loading system power test equipment according to claim 1, which is characterized in that the disc weighing unit further includes
One fixing seat and column, the disc is fixed on the fixing seat by the column, and the fixing seat is mounted on the electricity
On the sensor that son claims.
3. magnetic head loading system power test equipment according to claim 2, which is characterized in that each disc includes one being mounted on institute
State coiled hair on column and from a side of the coiled hair to disk tooth in elongate shape made of horizontal extension, the disk tooth of each disc according to
Secondary superposition forms the comb teeth-shaped.
4. magnetic head loading system power test equipment according to claim 1, which is characterized in that the magnetic-head positioning construction includes fixed
Magnetic head is located in the pedestal group of magnetic head loading system power test equipment by hyte part, spinning component and clamping component, the positioning component
On part, the spinning component positions the magnetic head in the vertical direction, and the clamping component positions the magnetic in the horizontal direction
Head.
5. magnetic head loading system power test equipment according to claim 4, which is characterized in that the positioning component includes a cylinder
Platform and the locating shaft being mounted on the cylinder table, the locating shaft matched with the bearing location hole of the magnetic head with will described in
Magnetic head is on the cylinder table.
6. magnetic head loading system power test equipment according to claim 5, which is characterized in that the spinning component includes a driving
Device and one drives the pressure head to move up and down by the driving device, and the pressure head is from the top of the positioning component to the magnetic
Head is compressed.
7. magnetic head loading system power test equipment according to claim 5, which is characterized in that the clamping component includes a clamping
Fixing seat is mounted on the cylinder being fixedly clamped on seat, the base of the carrier head moved horizontally under cylinder driving and installation
Detent fit on collet on the base of the carrier head, the collet and the base assembly to position institute in the horizontal direction
State magnetic head.
8. magnetic head loading system power test equipment according to claim 1, which is characterized in that the magnetic head loading system power test equipment
It further include moving back comb teeth component, a upper comb dent component and a support comb teeth component, it is described to move back comb teeth component and the upper comb dent component
It cooperates and is used to protect the comb teeth of magnetic head to back out or load onto from magnetic head on magnetic head will be sleeved on, the support comb teeth component is used
In lifting the comb teeth backed out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385326.0A CN105336345B (en) | 2014-08-06 | 2014-08-06 | Magnetic head loading system power test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385326.0A CN105336345B (en) | 2014-08-06 | 2014-08-06 | Magnetic head loading system power test equipment |
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| CN105336345A CN105336345A (en) | 2016-02-17 |
| CN105336345B true CN105336345B (en) | 2019-06-14 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2315626Y (en) * | 1997-11-03 | 1999-04-21 | 深圳开发科技股份有限公司 | Tester for head stack loading force |
| CN2460984Y (en) * | 2000-08-02 | 2001-11-21 | 深圳开发科技股份有限公司 | Automatic machine for investigating loading force of multiple magnetic heads at the same time |
| CN201130531Y (en) * | 2007-12-21 | 2008-10-08 | 科瑞自动化技术(深圳)有限公司 | System for measuring elastic arm loading force |
| CN203982789U (en) * | 2014-08-06 | 2014-12-03 | 深圳长城开发科技股份有限公司 | Magnetic head loading system power testing apparatus |
-
2014
- 2014-08-06 CN CN201410385326.0A patent/CN105336345B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2315626Y (en) * | 1997-11-03 | 1999-04-21 | 深圳开发科技股份有限公司 | Tester for head stack loading force |
| CN2460984Y (en) * | 2000-08-02 | 2001-11-21 | 深圳开发科技股份有限公司 | Automatic machine for investigating loading force of multiple magnetic heads at the same time |
| CN201130531Y (en) * | 2007-12-21 | 2008-10-08 | 科瑞自动化技术(深圳)有限公司 | System for measuring elastic arm loading force |
| CN203982789U (en) * | 2014-08-06 | 2014-12-03 | 深圳长城开发科技股份有限公司 | Magnetic head loading system power testing apparatus |
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| Publication number | Publication date |
|---|---|
| CN105336345A (en) | 2016-02-17 |
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