CN109654977A - Handset shell depth of groove detection device and its detection method based on amesdial - Google Patents
Handset shell depth of groove detection device and its detection method based on amesdial Download PDFInfo
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- CN109654977A CN109654977A CN201910006479.2A CN201910006479A CN109654977A CN 109654977 A CN109654977 A CN 109654977A CN 201910006479 A CN201910006479 A CN 201910006479A CN 109654977 A CN109654977 A CN 109654977A
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- CN
- China
- Prior art keywords
- amesdial
- handset shell
- depth
- detection device
- groove
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/18—Measuring arrangements characterised by the use of mechanical techniques for measuring depth
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Telephone Set Structure (AREA)
Abstract
The present invention provides a kind of handset shell depth of groove detection device and its detection method based on amesdial, which includes pedestal and the support plate that is set on the pedestal；The front side of the support plate rotatably connects a positioning seat, and the positioning seat includes being vertically arranged and the first side for positioning and fixing handset shell and at least two being horizontally oriented in measurement and the second side for placing amesdial；It is provided in the support plate for second side any in the second side to be locked locking structure in the horizontal direction；It is placed with amesdial fixing seat in the second side being horizontally oriented in the second side, is provided with amesdial in the amesdial fixing seat；The edge of side corresponding with the second side flushes in each second side and handset shell.The present invention can detect the depth of groove of handset shell different sides, saved cubing cost, and save manpower and material resources, reduced production cost.
Description
Technical field
The present invention relates to handset shell depth of groove detection technique field more particularly to a kind of mobile phone shells based on amesdial
Body depth of groove detection device and its detection method.
Background technique
All there are many grooves, such as screen locking key groove, volume button groove etc. at handset shell edge, in handset shell
In manufacture and production, need to measure the depth of groove, whether the depth for detecting groove is qualified.In the prior art, opponent
The detection of machine housing groove needs to detect the groove in handset shell different sides respectively by a plurality of cubings, testing fixture design and
Development cost is higher, takes a long time, and keeps testing cost higher, and wasting manpower and material resources, increases production cost.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
In view of the deficiencies in the prior art, the handset shell depth of groove based on amesdial that it is an object of that present invention to provide a kind of
Detection device and its detection method, it is intended to solve detection handset shell groove in the prior art and need a plurality of cubings, testing cost
Higher problem.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of handset shell depth of groove detection device based on amesdial, wherein including pedestal and be set to the pedestal
On support plate；The front side of the support plate rotatably connects a positioning seat, and the positioning seat includes being vertically arranged and being used for
The first side and at least two for positioning and fixing handset shell are horizontally oriented and for placing thousand points in measurement
The second side of table；It is provided in the support plate for locking in the horizontal direction second side any in the second side
Locking structure；It is placed with amesdial fixing seat in the second side being horizontally oriented in the second side, described thousand points
Amesdial is provided in table fixing seat；The side of side corresponding with the second side in each second side and handset shell
Edge flushes.
Further, the locking structure includes a bolt, is provided in the support plate for accommodating the bolt
Through-hole, the through-hole and the bolt clearance fit, be provided on rear side of the positioning seat several be adapted to the bolt it is slotting
Pin hole, the bolt are inserted into any pin hole, can be by a second side locking in the horizontal direction.
Further, it is provided with positive stop lug boss in the through-hole, is provided on the positive stop lug boss and is sheathed on the bolt
The spring on surface, one end of the bolt is provided with prevents the bolt to be drawn out the through-hole for being pressed in the spring end
Enlarged head.
Further, the locking structure further includes the handle for connecting with the bolt and be used to plug the bolt.
Further, a convex block is arranged in the front end of the amesdial fixing seat, and the amesdial is vertically installed in described convex
On block.
Further, the positioning seat is rectangle, and leading flank is first side, and four, upper and lower, left and right side is
Second side.
Further, the size of the first side and the size of handset shell are consistent.
Further, the positioning pin for being positioned to handset shell is provided in the first side.
Further, the positioning seat is rotatably connected by a shaft in the front side of the support plate.
Invention additionally discloses a kind of handset shell depth of groove detection method, use is described in any item among the above to be based on thousand
Divide the handset shell depth of groove detection device of table, which includes the following steps:
Handset shell is fixed in the first side of the positioning seat；
In the horizontal direction by the second side locking in the second side；
Amesdial fixing seat is placed in locking second side in the horizontal direction, and amesdial is zeroed；
It is surveyed by depth of groove of the amesdial to side corresponding with the second side being horizontally oriented on handset shell
Amount；
Amesdial fixing seat is taken down from the second side for be currently at horizontal direction；
Rotational positioning seat makes another second side locking in the horizontal direction；
Amesdial fixing seat is placed on and is relocked in second side in the horizontal direction, and amesdial is zeroed；
By amesdial to the depth of groove on side corresponding with second side in the horizontal direction is relocked on handset shell into
Row measurement.
The invention discloses a kind of handset shell depth of groove detection device and its detection method based on amesdial, this hair
In the bright handset shell depth of groove detection device based on amesdial, it is provided at least two on positioning seat and is in measurement
The second side of horizontal direction, and positioning seat can rotate on the supporting plate, on the handset shell that when measurement only will need to need measure
The locking of groove corresponding second side in the horizontal direction, amesdial is placed and is zeroed in this second side, then to corresponding
The depth of groove measure, the depth of groove of handset shell different sides can be detected in this way, without passing through
Multiple cubings detect the groove on each side of handset shell respectively, have saved the design and development cost of cubing, and save
Manpower and material resources, reduce production cost.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Embodiment and its explanation please is not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is the schematic diagram of front three-dimensional structure of the handset shell depth of groove detection device the present invention is based on amesdial；
Fig. 2 is the back side dimensional structure diagram of Fig. 1 of the present invention；
Fig. 3 is the decomposition texture schematic diagram of Fig. 2 of the present invention；
Fig. 4 is the backsight structural representation of the handset shell depth of groove detection device the present invention is based on amesdial；
Fig. 5 is in Fig. 4 of the present invention along Section A-A schematic cross-sectional view；
Fig. 6 is the enlarged drawing of part B in Fig. 5 of the present invention；
Fig. 7 is the schematic perspective view after being rotated by 90 ° positioning seat in Fig. 1 of the present invention.
Specific embodiment
Presently filed embodiment is described in detail below in conjunction with accompanying drawings and embodiments, how the application is applied whereby
Technological means solves technical problem and reaches the realization process of technical effect to fully understand and implement.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combine.
In the description of the present invention, it is to be understood that, term " on ", "lower", "left", "right", "front", "rear", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
As depicted in figs. 1 and 2, Fig. 1 is the front of the handset shell depth of groove detection device the present invention is based on amesdial
Schematic perspective view, Fig. 2 are the back side dimensional structure diagrams of Fig. 1 of the present invention, and the present invention is based on the handset shells of amesdial
Depth of groove detection device 1 includes pedestal 10, support plate 20, positioning seat 30, amesdial fixing seat 40 and amesdial 50, is needed
The handset shell 2 of measurement is located on positioning seat 30.
Support plate 20 is vertically arranged on pedestal 10, is preferably arranged on the back-end location of pedestal 10, in this way can be the bottom of by
The front end of seat 10 is vacated, and seat 30 is easily installed and positioned.
Positioning seat 30 is rotatably coupled to the front side of support plate 20, and amesdial 50 is fixed in amesdial fixing seat 40,
And amesdial fixing seat 40 is located on positioning seat 30 and measures handset shell 2, and positioning seat 30 is designed as rotatably
Structure, so that it may amesdial 50 is placed on the not ipsilateral of positioning seat 30 by rotational positioning seat 30, by amesdial 50
After zero, the groove of each side of handset shell 2 is measured, realizes multiple sides of a cubing measurement handset shell 2
Side groove measures without replacing multiple cubings, has saved the design and development cost of cubing, while also saving replacement
It the time of cubing, improves work efficiency.
Since amesdial fixing seat 40 is located on positioning seat 30 rather than is fixed on positioning seat 30, institute in the present invention
When being placed on positioning seat 30 with amesdial fixing seat 40, it is preferably in horizontal plane, it in this way can be to avoid amesdial fixing seat
40 slidings, so, it is necessarily provided on positioning seat 30 in measurement and is horizontally oriented side to place amesdial, by this side
It is denoted as second side 31, as shown in Figure 1.
And amesdial fixing seat 40 place in the horizontal plane, if then the positioning surface of handset shell 2 just vertical plane, in this way
The plane (second side 31) that just can guarantee that amesdial fixing seat 40 is placed is flushed with 2 edge of handset shell, so positioning seat 30
On also to include being vertically arranged first side 32 for positioning and fixing handset shell 2.
Since the handset shell depth of groove detection device 1 the present invention is based on amesdial is needed to the multiple of handset shell 2
Side grooves are detected, so need multiple second sides 31 accordingly, and each second side 31 on handset shell 1
The edge of side corresponding with the second side 31 flushes.Second side 31 at least two.
When measurement, first amesdial fixing seat 40 is placed in the second side 31 being horizontally oriented, by amesdial 50
Zero, is then measured with depth of the amesdial 50 to the groove on 2 side of handset shell.Amesdial 50 has a measuring head
51, after amesdial fixing seat 40 is placed in the second side 31 being horizontally oriented, by measuring head be drawn to this second
The position that side 31 contacts, then presses the zero button of amesdial 50, indicates the plane phase flushed with the second side 31 at this time
Distance for 50 measuring head of amesdial is exactly zero, and amesdial fixing seat 40 is then moved to measuring head 51 and is directed at handset shell
2 groove location pulls measuring head 51, draws the position contacted to measuring head 51 with bottom portion of groove, shows on amesdial 50 at this time
Number be exactly groove depth.Then rotational positioning seat 30 surveys the groove on other sides of handset shell 2
Amount, as shown in fig. 7, Fig. 7 is the schematic perspective view after being rotated by 90 ° positioning seat in Fig. 1 of the present invention.
As shown in Figure 1, it is preferred that positioning seat 30 is rectangular cylindrical, and the leading flank of the positioning seat 30 of rectangular cylindrical is first
Side 32, upper and lower, right four sides are second side 31, and side is the joint face with support plate 20 thereafter.Certainly, it positions
The shape of seat 30 is not limited to rectangular cylindrical, or polygon column, such as regular hexagonal prism.
Please continue to refer to Fig. 1, the size of first side 32 is consistent with the size of handset shell 2, so that on handset shell 2
The edge of the side for needing to measure groove flushed with corresponding second side 31.
As shown in connection with fig. 3, Fig. 3 is the decomposition texture schematic diagram of Fig. 2 of the present invention, is provided with locking structure in support plate 20
21, locking structure 21 is used to any one second side 31 locking in multiple second sides 31 in the horizontal direction.
As shown in figure 3, locking structure 21 includes a bolt 211.It is provided in support plate 20 for accommodating the bolt
Through-hole 22, through-hole 22 and bolt clearance fit, such bolt can move in through-hole 22.If being provided on rear side of positioning seat 30
The dry pin hole 33 being adapted to bolt 211 can will be in multiple second sides 31 in any one pin hole 33 of bolt 211
One second side locking is in the horizontal direction.After positioning seat 30 is rotated to suitable measurement position, bolt 211 is inserted into bolt
It, can be by a locking of second side 31 in the horizontal direction in hole 33.
In conjunction with shown in Fig. 4, Fig. 5 and Fig. 6, Fig. 4 is the handset shell depth of groove detection device the present invention is based on amesdial
Backsight structural representation, Fig. 5 be along Section A-A schematic cross-sectional view in Fig. 4 of the present invention, Fig. 6 be in Fig. 5 of the present invention part
The enlarged drawing of B is provided with positive stop lug boss 221 in the through-hole 22 in support plate 20, is provided on positive stop lug boss 221 and is sheathed on bolt
The spring 222 on 211 surfaces, one end of bolt 211 are provided with enlarged head 213, and the diameter of enlarged head 213 is bigger, make so big
Head 213 can be pressed in 222 end of spring, withstand spring, prevent bolt 211 from being pulled back from through-hole 222.Provided with bullet
After spring 222, after pulling back bolt 211, bolt 22 can automatically reset again and be inserted into the upper bolt of positioning seat 30 after release
It is in hole 33, positioning seat 30 is fixed.
As shown in figure 5, locking structure 21 further includes handle 212, handle 212 is connect with the rear end of bolt 211, can be used for inserting
Plug pin 211.Preferably, handle 212 and bolt 211 are hinged by fixed pin 214, and handle 212 is cam structure, when pulling handle
When hand 212 is rotated around fixed pin 214, so that it may it pulls bolt 211 to move backward, is extracted from pin hole 33, it thus can be with
Rotational positioning seat 30 after positioning seat 30 is turned to suitable position, unclamps again handle 212, bolt 211 is in spring 222
Elastic force effect is lower to be resetted, and bolt 211 is pushed to be inserted into another pin hole 33.
Referring to Fig. 1, a convex block 41 is arranged in the front end of amesdial fixing seat 40, amesdial 50 is vertically installed in convex block 41
On.The setting of convex block 41 can make the measuring head 51 of amesdial 50 be suspended on 41 lower section of convex block, convenient for the recessed of measurement handset shell 2
Groove depth.
Referring to Fig. 1, being provided with the positioning pin 321 for being positioned to handset shell 2, positioning pin in first side 32
It is preferably arranged on the diagonal position corresponding position with handset shell 2, more accurate positioning can be made in this way.In addition, due to first side
32 be perpendicular, so positioning pin 321 is horizontally oriented, so that after handset shell 2 is located on positioning pin 321,
Can be fixed by handset shell 2 by means of positioning pin 321 simultaneously, it is suspended on positioning pin 321, is fixed without other fixation members
, so directly by handset shell 2 be suspended on positioning pin 321 can handset shell 2 easy to disassemble, directly hang up and take off i.e.
Can, it improves work efficiency.
As shown in Figures 2 and 3, positioning seat 30 is connected to the front side of support plate 20 by a shaft 34, it is to be understood that
It is provided with bearing between shaft 34 and support plate 20, so that shaft 34 can rotate in support plate 20, and then makes positioning seat
30 rotations.
Handset shell depth of groove detection device according to aforementioned present invention based on amesdial, in conjunction with Fig. 1 and Fig. 7, this hair
It is bright to additionally provide a kind of handset shell depth of groove detection method, wherein to include the following steps:
Handset shell 2 is fixed in the first side 32 of positioning seat 30；
In the horizontal direction by the second side locking in second side 31；
Amesdial fixing seat 40 is placed in locking second side 31 in the horizontal direction, and amesdial 50 is zeroed；
By amesdial 50 to the depth of groove of side corresponding with the second side 31 being horizontally oriented on handset shell 2 into
Row measurement；
Amesdial fixing seat 40 is taken down from the second side 31 for being currently at horizontal direction；
Rotational positioning seat 30 makes another locking of second side 31 in the horizontal direction；
Amesdial fixing seat 40 is placed on and is relocked in second side 31 in the horizontal direction, and amesdial 50 is zeroed；
It is deep by groove of the amesdial 50 to side corresponding with second side 31 in the horizontal direction is relocked on handset shell 2
Degree measures.
In conclusion the invention discloses a kind of handset shell depth of groove detection device and its detection based on amesdial
Method, in the handset shell depth of groove detection device of the invention based on amesdial, be provided on positioning seat at least two
The second side being horizontally oriented when measurement, and positioning seat can rotate on the supporting plate only will need to need measure when measurement
Amesdial is placed and is zeroed in this second side in the horizontal direction by the corresponding second side locking of groove on handset shell,
Then the depth of corresponding groove is measured, the depth of groove of handset shell different sides can be examined in this way
Survey, without detecting the groove on each side of handset shell respectively by multiple cubings, saved cubing design and exploitation at
This, and manpower and material resources are saved, reduce production cost.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of handset shell depth of groove detection device based on amesdial, which is characterized in that including pedestal and be set to
Support plate on the pedestal；The front side of the support plate rotatably connects a positioning seat, and the positioning seat includes vertically setting
It sets and the first side for positioning and fixing handset shell and at least two is horizontally oriented and is used in measurement
Place the second side of amesdial；It is provided in the support plate for second side any in the second side to be locked in
The locking structure of horizontal direction；Amesdial fixing seat is placed in the second side being horizontally oriented in the second side,
Amesdial is provided in the amesdial fixing seat；It is corresponding with the second side in each second side and handset shell
The edge of side flushes.
2. the handset shell depth of groove detection device according to claim 1 based on amesdial, which is characterized in that described
Locking structure includes a bolt, and the through-hole for accommodating the bolt is provided in the support plate, and the through-hole is inserted with described
Clearance fit is sold, several pin holes being adapted to the bolt are provided on rear side of the positioning seat, the bolt insertion is any
It, can be by a second side locking in the horizontal direction in pin hole.
3. the handset shell depth of groove detection device according to claim 2 based on amesdial, which is characterized in that described
It is provided with positive stop lug boss in through-hole, the spring for being sheathed on the latch surface is provided on the positive stop lug boss, the bolt
One end is provided with the enlarged head for preventing the bolt to be drawn out the through-hole for being pressed in the spring end.
4. the handset shell depth of groove detection device according to claim 2 based on amesdial, which is characterized in that described
Locking structure further includes the handle for connecting with the bolt and be used to plug the bolt.
5. the handset shell depth of groove detection device according to claim 1 based on amesdial, which is characterized in that described
A convex block is arranged in the front end of amesdial fixing seat, and the amesdial is vertically installed on the convex block.
6. the handset shell depth of groove detection device according to claim 1 based on amesdial, which is characterized in that described
Positioning seat is rectangle, and leading flank is first side, and four, upper and lower, left and right side is second side.
7. the handset shell depth of groove detection device according to claim 6 based on amesdial, which is characterized in that described
The size of first side and the size of handset shell are consistent.
8. the handset shell depth of groove detection device according to claim 7 based on amesdial, which is characterized in that described
The positioning pin for being positioned to handset shell is provided in first side.
9. the handset shell depth of groove detection device according to claim 1 based on amesdial, which is characterized in that described
Positioning seat is rotatably connected by a shaft in the front side of the support plate.
10. a kind of handset shell depth of groove detection method, using of any of claims 1-9 described based on amesdial
Handset shell depth of groove detection device, which is characterized in that the handset shell depth of groove detection method includes the following steps:
Handset shell is fixed in the first side of the positioning seat；
In the horizontal direction by the second side locking in the second side；
Amesdial fixing seat is placed in locking second side in the horizontal direction, and amesdial is zeroed；
It is surveyed by depth of groove of the amesdial to side corresponding with the second side being horizontally oriented on handset shell
Amount；
Amesdial fixing seat is taken down from the second side for be currently at horizontal direction；
Rotational positioning seat makes another second side locking in the horizontal direction；
Amesdial fixing seat is placed on and is relocked in second side in the horizontal direction, and amesdial is zeroed；
By amesdial to the depth of groove on side corresponding with second side in the horizontal direction is relocked on handset shell into
Row measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910006479.2A CN109654977A (en) | 2019-01-04 | 2019-01-04 | Handset shell depth of groove detection device and its detection method based on amesdial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910006479.2A CN109654977A (en) | 2019-01-04 | 2019-01-04 | Handset shell depth of groove detection device and its detection method based on amesdial |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109654977A true CN109654977A (en) | 2019-04-19 |
Family
ID=66118504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910006479.2A Pending CN109654977A (en) | 2019-01-04 | 2019-01-04 | Handset shell depth of groove detection device and its detection method based on amesdial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109654977A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110254847A (en) * | 2019-06-26 | 2019-09-20 | 东莞理工学院 | A kind of phone housing detection packaging integrated equipment based on 3D printing |
| CN110726569A (en) * | 2019-11-19 | 2020-01-24 | 山东交通职业学院 | Automobile tire wear detection device |
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| JPS60179602A (en) * | 1984-02-28 | 1985-09-13 | Sumitomo Electric Ind Ltd | Method and instrument for measuring throat depth of fillet weld bead |
| CN200957145Y (en) * | 2006-09-11 | 2007-10-10 | 丹阳市金桥健身器材厂 | Folder of wheel chair pushing bars |
| CN203116646U (en) * | 2013-03-01 | 2013-08-07 | 浙江西南工具有限公司 | Adjustable blade vertical inspection tool |
| CN206281428U (en) * | 2016-12-23 | 2017-06-27 | 东莞市鼎启五金科技有限公司 | Groove measures measurer |
| CN206627052U (en) * | 2017-04-07 | 2017-11-10 | 常州华德机械有限公司 | Gearbox drive shaft detection instrument |
| CN207189237U (en) * | 2017-08-25 | 2018-04-06 | 东莞市亿厚电子科技有限公司 | A kind of mobile phone shell side opening CNC clamp for machining |
| CN207528149U (en) * | 2017-12-05 | 2018-06-22 | 海宁弘德机械有限公司 | A kind of handle of a knife tapering length check tool |
| CN208187281U (en) * | 2018-04-13 | 2018-12-04 | 汕头市依斯吉轴承制造有限公司 | A kind of contact ball bearing groove position-measurement device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60179602A (en) * | 1984-02-28 | 1985-09-13 | Sumitomo Electric Ind Ltd | Method and instrument for measuring throat depth of fillet weld bead |
| CN200957145Y (en) * | 2006-09-11 | 2007-10-10 | 丹阳市金桥健身器材厂 | Folder of wheel chair pushing bars |
| CN203116646U (en) * | 2013-03-01 | 2013-08-07 | 浙江西南工具有限公司 | Adjustable blade vertical inspection tool |
| CN206281428U (en) * | 2016-12-23 | 2017-06-27 | 东莞市鼎启五金科技有限公司 | Groove measures measurer |
| CN206627052U (en) * | 2017-04-07 | 2017-11-10 | 常州华德机械有限公司 | Gearbox drive shaft detection instrument |
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| CN207528149U (en) * | 2017-12-05 | 2018-06-22 | 海宁弘德机械有限公司 | A kind of handle of a knife tapering length check tool |
| CN208187281U (en) * | 2018-04-13 | 2018-12-04 | 汕头市依斯吉轴承制造有限公司 | A kind of contact ball bearing groove position-measurement device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110254847A (en) * | 2019-06-26 | 2019-09-20 | 东莞理工学院 | A kind of phone housing detection packaging integrated equipment based on 3D printing |
| CN110726569A (en) * | 2019-11-19 | 2020-01-24 | 山东交通职业学院 | Automobile tire wear detection device |
| CN110726569B (en) * | 2019-11-19 | 2021-06-11 | 山东交通职业学院 | Automobile tire wear detection device |
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Application publication date: 20190419 |