CN115900508A

CN115900508A - Cell-phone front shell plane degree detection tool

Info

Publication number: CN115900508A
Application number: CN202211415538.XA
Authority: CN
Inventors: 杨波
Original assignee: Guangdong Lingfeng Intelligent Technology Co ltd
Current assignee: Guangdong Lingfeng Intelligent Technology Co ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-04-04

Abstract

The invention belongs to the technical field of detection jigs, and particularly relates to a mobile phone front shell flatness detection jig which comprises a bottom plate, wherein four first thread sunken grooves are formed in the top of the bottom plate, positioning columns are connected with the first thread sunken grooves in an inner thread mode, positioning rings are arranged on the positioning columns, a test board and a supporting board are sleeved among a plurality of the positioning columns, the supporting board is located below the positioning rings, first external threads and second external threads are formed in the positioning columns, first positioning nuts are connected to the first external threads, second positioning nuts are connected to the second external threads in a threaded mode, two test areas are arranged on the top of the test board, a plurality of positioning holes are formed in the test areas, ejector pins are inserted into the positioning holes, a display board is arranged on the tops of the ejector pins located in the same test area, and a level meter is arranged on the display board. According to the invention, the flatness of the front shell of the mobile phone is reflected through the display board, and whether the flatness is qualified or not is detected through the level meter, so that the front shell of the mobile phone which seriously exceeds the error allowable range is effectively and quickly screened out.

Description

Cell-phone front shell plane degree detection tool

Technical Field

The invention relates to the technical field of detection jigs, in particular to a flatness detection jig for a front shell of a mobile phone.

Background

Mobile phones have become indispensable electronic products for people's life, and as the mobile phone industry continues to develop and progress, the requirements of people on the quality of mobile phones are also increasing. For the mobile phone, in order to ensure the quality of the mobile phone, the requirement on the flatness of the front shell of the mobile phone is very high, so after the front shell of the mobile phone is produced, strict flatness detection is carried out on the front shell of the mobile phone, and defective products are screened out.

In the prior art, a flatness detector is generally used for detecting the flatness of a front shell of a mobile phone, the device is precise and has high detection precision, but one traditional flatness detector can only scan and detect one front shell of the mobile phone at a time and can complete detection within a certain detection time, so that the detection efficiency is low, and further the production cost is high.

Disclosure of Invention

Based on the technical problem that the existing flatness detection equipment is low in detection efficiency, the invention provides a flatness detection jig for a front shell of a mobile phone.

The invention provides a mobile phone front shell flatness detection jig which comprises a bottom plate, wherein four first thread sunken grooves which are distributed diagonally are formed in the top of the bottom plate, positioning columns are connected with the first thread sunken grooves in an internal thread mode, positioning rings are arranged on the positioning columns, a testing plate and a supporting plate which are distributed up and down are sleeved among the positioning columns, the testing plate is arranged on the positioning rings in a lapping mode, the supporting plate is located below the positioning rings, first external threads and second external threads are formed in the positioning columns, the first external threads are located below the supporting plate, first positioning nuts are connected to the first external threads, the second external threads are located above the testing plate, second positioning nuts are connected to the second external threads in a threaded mode, two testing areas which are distributed uniformly are arranged at the top of the testing plate, a plurality of densely distributed positioning holes are formed in the testing areas, the positioning holes are thick and thin, matched ejector pins are inserted into the positioning holes, the tops of the ejector pins located in the same testing area are provided with the same display plate, and a level meter is arranged on the display plate.

Preferably, a plurality of the first positioning nuts support the supporting plate at the same height, and a plurality of the second positioning nuts press the test plate onto the positioning ring.

Preferably, be provided with same electric putter between bottom plate and the layer board, electric putter output shaft has the push pedal, the both sides of push pedal are all inserted and are equipped with first knob, layer board bottom outer wall is seted up two third screw thread heavy grooves that are bilateral symmetry and distribute, first knob and the heavy groove threaded connection of the third screw thread that corresponds, the both sides of electric putter bottom are all inserted and are equipped with the second knob, two fourth screw thread heavy grooves that are bilateral symmetry and distribute are seted up at the top of bottom plate, the heavy groove threaded connection of second knob and the fourth screw thread that corresponds.

Preferably, two sets of first round holes are formed in the top of the supporting plate, the two sets of first round holes are respectively located under corresponding test areas, the number of the first round holes in each set is four, the four first round holes are distributed diagonally, a top column is inserted into each first round hole, a first nut is connected to the bottom end of the top column in a threaded mode, and the first nut is located below the first round holes.

Preferably, the top end of the top column is of a smooth spherical structure.

Preferably, two second round holes that are the front and back distribution are all seted up to the both sides in test area, second round hole interpolation is equipped with stabilizes the post, it has the second nut to stabilize post bottom threaded connection, the second nut is located the below of second round hole, the both sides of show board all are equipped with the first ear of two front and back symmetric distributions, first jack has been seted up in the first ear, it inserts in the first jack that corresponds to stabilize the post, the diameter of first jack is greater than the diameter of stabilizing the post.

Preferably, show board top is equipped with solid fixed ring, gu the fixed ring internal rotation is connected with the support column, the support column top is equipped with the mounting panel, the spirit level is located the mounting panel.

Preferably, two third round holes that are bilateral symmetry and distribute are seted up at the mounting panel top, the spirit level both sides all are equipped with the second ear, it is equipped with positioning bolt to insert on the second ear, positioning bolt inserts in a third round hole that corresponds, positioning bolt bottom threaded connection has the third nut, the third nut is located the below of third round hole.

Preferably, the top of the circumferential outer wall of each of the two stabilizing columns in the same group is provided with a third external thread, the two stabilizing columns are distributed diagonally, and the third external thread is connected with an anti-falling nut in a threaded manner.

Compared with the prior art, the invention provides a flatness detection jig for a front shell of a mobile phone, which has the following beneficial effects:

1. the invention provides a mobile phone front shell flatness detection jig, which is actually used for rapidly screening out defective products with large errors and obvious flatness problems so as to improve the detection efficiency, based on the detection, the plane of a mobile phone front shell is upwards placed on a supporting plate, the position of the mobile phone front shell is adjusted to ensure that the mobile phone front shell is positioned in an area covered under a test area, then a display plate is put on the tops of a plurality of ejector pins, a level gauge is placed at the central position of the display plate, then an electric push rod is started, an output shaft of the electric push rod drives a push plate and the supporting plate to integrally move upwards, namely the mobile phone front shell can be upwards pushed to a position close to the test area through the supporting plate, the mobile phone front shell can firstly contact with the ejector pins and then gradually jacks up the ejector pins, because the bottom ends of the ejector pins are in intensive point contact with the plane of the mobile phone front shell, the ejector pins are mutually independent, the height of the ejector pins jacked up can be different, the planeness of the front shell of the mobile phone can be displayed through the height difference of the ejector pins, whether the planeness of the front shell of the mobile phone is obviously unqualified or not can be obviously seen through directly observing whether gaps exist between the ejector pins and the display plate or not, further, the height difference of the ejector pins can also enable the display plate above the ejector pins to generate plane inclination so as to reflect the planeness of the front shell of the mobile phone through whether the display plate is inclined or not, at the moment, whether the planeness of the front shell of the mobile phone is qualified or not can be detected only through observing a level gauge, so that the front shell of the mobile phone with the planeness which seriously exceeds an error allowable range is effectively and quickly detected, for the front shell of the mobile phone which is difficult to accurately detect by the level gauge, the detection by a precise instrument is carried out, in addition, the assembly and disassembly of each part of the detection tool are convenient, the production is convenient, the manufacturing cost is low, and the number of the test areas can be designed according to actual conditions, so that synchronous detection of a plurality of mobile phone front shells is achieved, and the detection efficiency is effectively improved.

2. This casing plane degree detection tool before cell-phone through being provided with the fore-set, can take the casing before the cell-phone on being located same a set of a plurality of fore-sets, can effectively fix a position the casing before the cell-phone fast, short-term test, and the top of fore-set is glossy spherical structure, can effectively reduce wearing and tearing and the mar to the casing before the cell-phone for the fine setting process to the casing position before the cell-phone is convenient.

3. This casing plane degree detection tool before cell-phone through be equipped with first ear on the show board to be provided with and stabilize the post, insert in the first jack in first ear through stabilizing the post, can effectively prevent the show board slippage, and the diameter of first jack is greater than and stabilizes the post, can make the show board carry out normal slope.

4. This casing plane degree detection tool before cell-phone, through being provided with the mounting panel, and form between the whole of mounting panel and the show board and rotate and be connected to the spirit level is fixed on the mounting panel, when the show board when to arbitrary direction slope, under the action of gravity, can make the spirit level take place to rotate, finally stops in the position parallel with show board slope plane looks, can make the testing result of spirit level more accurate.

5. This casing plane degree detection tool before cell-phone through being provided with the anticreep nut, can be when carrying this tool, screws up the anticreep nut on a stable post that corresponds for the show board is pressed on the thimble, thereby prevents effectively that the thimble from coming off from the locating hole at the in-process of carrying, thereby conveniently carries this tool integration.

Drawings

Fig. 1 is a schematic view of a first angle structure of a mobile phone front case flatness detection fixture according to the present invention;

fig. 2 is a schematic view of a second angle structure of the mobile phone front shell flatness detection fixture according to the present invention;

fig. 3 is a schematic view of a positioning column mounting structure of a mobile phone front shell flatness detection fixture provided by the invention;

fig. 4 is a schematic view of an ejector pin mounting structure of a mobile phone front shell flatness detection fixture according to the present invention;

FIG. 5 is a schematic top structure view of a test board of the tool for detecting the flatness of the front cover of a mobile phone according to the present invention;

fig. 6 is a schematic view of an installation bottom structure of an electric putter of a tool for detecting flatness of a front shell of a mobile phone according to the present invention;

fig. 7 is an enlarged schematic structural diagram of a position a of the mobile phone front shell flatness detection fixture provided by the present invention;

fig. 8 is a schematic view of an installation overlooking structure of an electric push rod of the mobile phone front shell flatness detection fixture provided by the invention;

fig. 9 is a schematic view of an assembly structure of a display board of a mobile phone front shell flatness detection fixture according to the present invention;

fig. 10 is a schematic view of a level assembly structure of a mobile phone front case flatness detection fixture according to the present invention.

In the figure: 1. a base plate; 2. a first thread sink; 3. a positioning column; 4. a first positioning nut; 5. a first external thread; 6. a support plate; 7. positioning rings; 8. a test board; 9. a second external thread; 10. a second positioning nut; 11. a test zone; 12. positioning holes; 13. a thimble; 14. a display board; 15. a level gauge; 16. an electric push rod; 17. pushing the plate; 18. a third thread sink; 19. a first knob; 20. a fourth thread sink; 21. a second knob; 22. a first circular hole; 23. a top pillar; 24. a first nut; 25. a second circular hole; 26. a stabilization post; 27. a second nut; 28. a first ear portion; 29. a first jack; 30. a fixing ring; 31. a support pillar; 32. mounting a plate; 33. a second ear; 34. a third circular hole; 35. positioning the bolt; 36. a third nut; 37. a third external thread; 38. an anti-drop nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Example 1

Referring to fig. 1-9, a mobile phone front shell flatness detection fixture comprises a bottom plate 1, four first thread grooves 2 distributed diagonally are formed in the top of the bottom plate 1, positioning posts 3 are connected to the first thread grooves 2 through internal threads, positioning rings 7 are arranged on the positioning posts 3, a test board 8 and a supporting board 6 distributed up and down are sleeved among the positioning posts 3, the test board 8 is lapped on the positioning rings 7, the supporting board 6 is positioned below the positioning rings 7, first external threads 5 and second external threads 9 are formed on the positioning posts 3, the first external threads 5 are positioned below the supporting board 6, first positioning nuts 4 are connected to the first external threads 5, the second external threads 9 are positioned above the test board 8, second positioning nuts 10 are connected to the second external threads 9 through threads, two uniformly distributed test areas 11 are arranged at the top of the test board 8, and a plurality of densely distributed positioning holes 12 are formed in the test areas 11, the positioning holes 12 are thick at the top and thin at the bottom, the ejector pins 13 are inserted into the positioning holes 12, the top of a plurality of ejector pins 13 positioned in the same test area 11 is provided with the same display plate 14, the display plate 14 is provided with a level gauge 15, the plane of the front shell of the mobile phone is placed on the supporting plate 6 in an upward direction, the position of the front shell of the mobile phone is adjusted to ensure that the front shell of the mobile phone is positioned in an area covered under the test area 11, then the display plate 14 is put on the top of the ejector pins 13, the level gauge 15 is placed at the central position of the display plate 14, the supporting plate 6 is pushed upwards, the front shell of the mobile phone is pushed upwards to a position close to the test area 11 through the supporting plate 6, the front shell of the mobile phone can be firstly contacted with the ejector pins 13 and then gradually jacked up the ejector pins 13, because the bottom ends of the ejector pins 13 are in intensive point contact with the plane of the front shell of the mobile phone, the ejector pins 13 are mutually independent, can make thimble 13 by the high disparity of jack-up, will make the show board 14 of thimble 13 top take place the plane slope, thereby show the plane degree of shell before the cell-phone through show board 14 embodiment, only need through observing spirit level 15 this moment, can detect out whether qualified the plane degree of shell before the cell-phone, thereby effective quick detection goes out the shell before the cell-phone that the plane degree seriously surpassed error tolerance, shell before the cell-phone that is difficult to accurate detection to spirit level 15, rethread precision instruments detects can, and convenient loading and unloading between each part of this detection tool, the production of being convenient for, the cost is with low costs, and test section 11's number can design according to actual conditions, reach shell synchronous detection before a plurality of cell-phones, effectively improve detection efficiency.

Further, a plurality of first set nut 4 with layer board 6 bearing at same height, a plurality of second set nut 10 compress tightly test board 8 to position circle 7 on, can prescribe a limit to the initial position of layer board 6, with the rigidity of test board 8.

Further, be provided with same electric putter 16 between bottom plate 1 and the layer board 6, electric putter 16 output shaft has push pedal 17, first knob 19 has all been inserted to push pedal 17's both sides, layer board 6 bottom outer wall is seted up two third screw thread heavy grooves 18 that are bilateral symmetry and are distributed, 18 threaded connection in first knob 19 and the third screw thread heavy groove that corresponds, second knob 21 has all been inserted to the both sides of electric putter 16 bottom, two fourth screw thread heavy grooves 20 that are bilateral symmetry and are distributed have been seted up at the top of bottom plate 1, second knob 21 and the fourth screw thread heavy groove 20 threaded connection that corresponds, can install electric putter 16 between bottom plate 1 and layer board 6, during the use, start electric putter 16, electric putter 16 output shaft drives push pedal 17 and layer board 6's whole upward movement.

Further, two sets of first round holes 22 have been seted up at 6 tops of layer board, two sets of first round holes 22 are located corresponding test section 11 respectively under, the quantity of every first round hole 22 of group is four, be diagonal distribution between four first round holes 22, first round hole 22 interpolation is equipped with fore-set 23, the threaded connection of fore-set 23 bottom has first nut 24, first nut 24 is located the below of first round hole 22, can install on layer board 6 two sets of fore-set 23, during the use, with the cell-phone preceding shell take on being located a plurality of fore-set 23 of same group, can effectively fix a position the cell-phone preceding shell fast, short-term test.

Further, the top of the support pillar 23 is of a smooth spherical structure, so that abrasion and scratch of the front shell of the mobile phone can be effectively reduced, and the fine adjustment process of the position of the front shell of the mobile phone is convenient.

Further, two second round holes 25 that are the front and back distribution are all seted up to the both sides of test area 11, second round hole 25 interpolation is equipped with stabilizes post 26, it has second nut 27 to stabilize post 26 bottom threaded connection, second nut 27 is located the below of second round hole 25, the both sides of show board 14 all are equipped with two front and back symmetric distribution's first ear 28, first jack 29 has been seted up on the first ear 28, it inserts in the first jack 29 that corresponds to stabilize post 26, the diameter of first jack 29 is greater than the diameter of stabilizing post 26, insert in the first jack 29 on the first ear 28 through stabilizing post 26, can effectively prevent show board 14 slippage, and the diameter of first jack 29 is greater than and stabilizes post 26, can make show board 14 carry out normal slope.

When the mobile phone front shell is used, the plane of the mobile phone front shell is upwards placed on the supporting plate 6, the position of the mobile phone front shell is adjusted to ensure that the mobile phone front shell is positioned in an area covered under the test area 11, then the display plate 14 is put on the tops of the ejector pins 13, then the level gauge 15 is placed at the central position of the display plate 14, then the electric push rod 16 is started, the output shaft of the electric push rod 16 drives the push plate 17 and the supporting plate 6 to integrally move upwards, namely the mobile phone front shell can be pushed upwards to a position close to the test area 11 through the supporting plate 6, the mobile phone front shell can firstly contact the ejector pins 13 and then gradually jacks up the ejector pins 13, as the bottom ends of the ejector pins 13 are in intensive point contact with the plane of the mobile phone front shell, the ejector pins 13 are mutually independent, namely the ejector pins 13 are not uniform in height, so that the display plate 14 above the ejector pins 13 is subjected to plane inclination, therefore, the flatness of the front shell of the mobile phone can be embodied through the display board 14, at the moment, whether the flatness of the front shell of the mobile phone is qualified can be detected only by observing the level gauge 15, so that the front shell of the mobile phone with the flatness seriously exceeding the error allowable range can be effectively and quickly detected, the front shell of the mobile phone which is difficult to accurately detect by the level gauge 15 can be detected by a precision instrument, moreover, each part of the detection jig is convenient to assemble and disassemble, convenient to produce and low in manufacturing cost, the number of the test areas 11 can be designed according to actual conditions, synchronous detection of a plurality of front shells of the mobile phone can be realized, the detection efficiency can be effectively improved, furthermore, the top columns 23 are arranged, the front shell of the mobile phone can be lapped on a plurality of top columns 23 in the same group, the front shell of the mobile phone can be quickly and effectively positioned, the detection can be quickly realized, the top ends of the top columns 23 are of smooth spherical structures, the abrasion and the scratches to the front shell of the mobile phone can be effectively reduced, make the fine setting process to the cell-phone front shell position convenient, it is further, be equipped with first ear 28 on show board 14 to be provided with and stabilize post 26, insert first jack 29 on first ear 28 through stabilizing post 26 in, can effectively prevent show board 14 slippage, and the diameter of first jack 29 is greater than and stabilizes post 26, can make show board 14 carry out normal slope.

Example 2

Referring to fig. 9-10, a fixture for detecting the flatness of a front case of a mobile phone is provided, wherein a fixing ring 30 is disposed on the top of a display board 14, a supporting post 31 is rotatably connected to the fixing ring 30, an installation plate 32 is disposed on the top of the supporting post 31, and a level 15 is disposed on the installation plate 32, so that when the display board 14 tilts in any direction, the level 15 can rotate under the action of gravity, and finally stops at a position parallel to the tilting plane of the display board 14, thereby enabling the detection result of the level 15 to be more accurate.

Further, two third round holes 34 that are bilateral symmetry and distribute are seted up at mounting panel 32 top, and spirit level 15 both sides all are equipped with second ear 33, insert on second ear 33 and are equipped with positioning bolt 35, and positioning bolt 35 inserts in a corresponding third round hole 34, and positioning bolt 35 bottom threaded connection has third nut 36, and third nut 36 is located the below of third round hole 34, can install spirit level 15 on mounting panel 32.

Further, wherein the third external screw thread 37 has all been seted up at the top that is located the circumference outer wall of two stabilizing columns 26 of same group, two stabilizing columns 26 are diagonal distribution, threaded connection has anticreep nut 38 on the third external screw thread 37, when carrying this tool, on screwing up a corresponding stabilizing column 26 with anticreep nut 38 for show board 14 presses on thimble 13, thereby effectively prevents that thimble 13 from droing from locating hole 12 at the in-process of carrying, thereby conveniently carries this tool integration.

During the use, be provided with mounting panel 32, and form the rotation between the whole of mounting panel 32 and the show board 14 and be connected, and spirit level 15 is fixed on mounting panel 32, when show board 14 inclines to arbitrary direction, under the action of gravity, can make spirit level 15 take place to rotate, finally stop in the position parallel with show board 14 slope plane looks, can make spirit level 15's testing result more accurate, furthermore, be provided with anticreep nut 38, can be when carrying this tool, screw up anticreep nut 38 on a corresponding stabilization post 26, make show board 14 press on thimble 13, thereby effectively prevent that thimble 13 from coming off from locating hole 12 in the process of carrying, thereby conveniently carry this tool integration.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a casing plane degree detection tool before cell-phone, includes bottom plate (1), its characterized in that, four first screw thread heavy groove (2) that are diagonal distribution are seted up at bottom plate (1) top, first screw thread heavy groove (2) female connection has reference column (3), be equipped with position circle (7) on reference column (3), it is a plurality of the cover is equipped with test board (8) and layer board (6) that distribute from top to bottom between reference column (3), test board (8) are taken on position circle (7), layer board (6) are located position circle (7) below, set up first external screw thread (5) and second external screw thread (9) on reference column (3), first external screw thread (5) are located the below of layer board (6), first external screw thread (5) department is connected with first positioning nut (4), second external screw thread (9) are located the top of test board (8), second external screw thread (9) department threaded connection has second positioning nut (10), top of first external screw thread (8) are equipped with a plurality of evenly distributed's district (11), and every test the top of the insertible thimble (12) of 12) is equipped with a plurality of insertible thimble (13) and the fine positioning hole (12) are laid in the test on the test board (12) the same thimble (13) the test board (12) of the top of the thimble (13) of the thimble) The display board (14) is provided with a level (15).

2. The mobile phone front shell flatness detection jig according to claim 1, wherein a plurality of first positioning nuts (4) support the supporting plate (6) at the same height, and a plurality of second positioning nuts (10) press the test board (8) onto the positioning ring (7).

3. The mobile phone front shell flatness detection jig according to claim 1, characterized in that a same electric push rod (16) is arranged between the bottom plate (1) and the supporting plate (6), an output shaft of the electric push rod (16) is connected with a push plate (17), first knobs (19) are inserted into both sides of the push plate (17), two third thread sinking grooves (18) which are symmetrically distributed on both sides are formed in the outer wall of the bottom of the supporting plate (6), the first knobs (19) are in threaded connection with the corresponding third thread sinking grooves (18), second knobs (21) are inserted into both sides of the bottom end of the electric push rod (16), two fourth thread sinking grooves (20) which are symmetrically distributed on both sides are formed in the top of the bottom plate (1), and the second knobs (21) are in threaded connection with the corresponding fourth thread sinking grooves (20).

4. The mobile phone front shell flatness detection jig according to claim 1, wherein two groups of first round holes (22) are formed in the top of the supporting plate (6), the two groups of first round holes (22) are respectively located right below the corresponding test areas (11), the number of the first round holes (22) in each group is four, the four first round holes (22) are distributed diagonally, a top column (23) is inserted into each first round hole (22), a first nut (24) is connected to the bottom end of each top column (23) in a threaded manner, and the first nut (24) is located below the first round holes (22).

5. The mobile phone front shell flatness detection fixture according to claim 4, wherein the top end of the top pillar (23) is a smooth spherical structure.

6. The flatness detection jig for the front shell of the mobile phone according to claim 1, wherein two second round holes (25) distributed front and back are formed in both sides of the test area (11), stabilizing columns (26) are inserted into the second round holes (25), second nuts (27) are connected to bottom ends of the stabilizing columns (26) in a threaded manner, the second nuts (27) are located below the second round holes (25), two first ear portions (28) symmetrically distributed front and back are formed in both sides of the display plate (14), first insertion holes (29) are formed in the first ear portions (28), the stabilizing columns (26) are inserted into the corresponding first insertion holes (29), and the diameter of the first insertion holes (29) is larger than that of the stabilizing columns (26).

7. The mobile phone front shell flatness detecting jig according to claim 6, wherein a fixing ring (30) is arranged at the top of the display board (14), a supporting column (31) is rotationally connected to the fixing ring (30), a mounting plate (32) is arranged at the top of the supporting column (31), and the level gauge (15) is located on the mounting plate (32).

8. The flatness detection jig for the front shell of the mobile phone according to claim 7, wherein two third round holes (34) which are symmetrically distributed on two sides are formed in the top of the mounting plate (32), second ear portions (33) are respectively arranged on two sides of the level (15), a positioning bolt (35) is inserted into each second ear portion (33), the positioning bolt (35) is inserted into the corresponding third round hole (34), a third nut (36) is connected to the bottom end of each positioning bolt (35) in a threaded manner, and the third nut (36) is located below the third round hole (34).

9. The flatness detecting jig for the front shell of the mobile phone according to claim 6, wherein third external threads (37) are formed on top portions of circumferential outer walls of two stabilizing columns (26) in the same group, the two stabilizing columns (26) are distributed diagonally, and anti-dropping nuts (38) are connected to the third external threads (37) in a threaded manner.