CN212120475U

CN212120475U - Spraying jig

Info

Publication number: CN212120475U
Application number: CN202020145233.1U
Authority: CN
Inventors: 邓水冰; 贺江波; 高其伟; 罗文刚; 黎亚奎
Original assignee: Nanchang OFilm Biometric Identification Technology Co Ltd
Current assignee: Ofilm Microelectronics Technology Co ltd; Jiangxi OMS Microelectronics Co Ltd
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-12-11
Anticipated expiration: 2030-01-22

Abstract

The application provides a spraying tool, including hiding the spraying upper cover and hiding the spraying base, hide the spraying upper cover lid and close on hiding the spraying base, hide the spraying upper cover and hide the spraying base and form the accommodation space jointly, the circuit board sets up in the accommodation space, hide the spraying upper cover and include the first surface and with the relative second surface that sets up of first surface, and hide the spraying upper cover and be equipped with the through-hole that runs through first surface and second surface, the fingerprint chip is acceptd in the through-hole, and protrusion in the first surface, the through-hole forms first opening in first surface department, the through-hole forms the second opening in second surface department, the edge and the second open-ended edge of the interior surface connection first opening of through-hole, the distance between first opening edge and the fingerprint chip side is greater than the distance between second opening edge and the fingerprint chip side. When being used for the spraying agent spraying technology of fingerprint module with this application spraying tool, fingerprint module complete machine installation performance is better to fingerprint chip outward appearance is complete.

Description

Spraying jig

Technical Field

The utility model relates to a product processing technology field, in particular to spraying tool.

Background

The fingerprint identification module is the key component in the fingerprint identification system, mainly through the fingerprint of discernment record in the electronic equipment in order being used for unblock electronic equipment. Along with the update iteration of fingerprint identification module, after the performance of fingerprint identification module promoted gradually, the aesthetic property of fingerprint identification module also becomes one of its present development trend.

When producing the fingerprint module and adding man-hour, need paint the spraying to the fingerprint module, when the fingerprint module was placed and is painted spraying technology in traditional spraying tool, paint easily spouts the side of fingerprint chip and the region of fingerprint chip bottom structure, thereby influence fingerprint module complete machine installation performance, and paint easy after toasting with the upper cover adhesion of spraying tool together, when taking out the fingerprint module from traditional spraying tool, can cause the fingerprint chip surface of fingerprint module to collapse the limit, thereby cause the incomplete lack of outward appearance not neat.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a spraying tool for solve above-mentioned technical problem.

The application discloses a spraying jig is used for surface spraying of a fingerprint module, the fingerprint module comprises a circuit board and a fingerprint chip arranged on the circuit board, and is characterized in that the spraying jig comprises a covering upper cover and a covering spraying base, the covering upper cover covers the covering spraying base, the covering upper cover and the covering spraying base are mutually matched to form an accommodating space, the circuit board is arranged in the accommodating space, the covering spraying upper cover comprises a first surface far away from the covering spraying base and a second surface oppositely arranged with the first surface, the covering spraying upper cover is provided with a through hole penetrating through the first surface and the second surface, the through hole is communicated with the accommodating space, the fingerprint chip is accommodated in the through hole and protrudes out of the first surface, the fingerprint chip comprises a side surface, and the side surface is oppositely arranged with the inner surface of the through hole, the through hole forms a first opening at the first surface, the through hole forms a second opening at the second surface, the inner surface of the through hole connects the edge of the first opening and the edge of the second opening, and the spacing distance between the edge of the first opening and the side surface is greater than the spacing distance between the edge of the second opening and the side surface.

Will this application the spraying tool is used for during the surface spraying technology of fingerprint module, because first open-ended edge with spacing distance between the fingerprint chip side is greater than second open-ended edge with spacing distance between the fingerprint chip side for the spraying agent can not spout the side of fingerprint chip with fingerprint chip bottom structure is regional, has guaranteed fingerprint module complete machine installation performance, and the spraying agent also can not with after toasting hide and spout the upper cover adhesion and be in the same place, dismantle hide when spouting the upper cover, just also can not cause the fingerprint module the fingerprint chip surface bursts the limit, thereby makes fingerprint chip outward appearance is complete.

Wherein, the interval distance range between the edge of the first opening and the side surface of the fingerprint chip is 0.3 mm-0.5 mm. When the spacing distance between the edge of the first opening and the fingerprint chip is small, the spraying agent can be attached between the fingerprint chip and the shielding upper cover, and the spraying agent can be adhered with the shielding upper cover after the baking process, so that the edge breakage problem can occur on the surface of the fingerprint chip when the shielding upper cover is detached, and the appearance integrity of the fingerprint chip is influenced; when the first opening edge with when the interval distance between the fingerprint chip is great, right the fingerprint module carries out spraying agent spraying technology, the spraying agent is spouted easily the side of fingerprint chip to influence the complete machine installation performance of fingerprint module. When the first open-ended edge with when the spacing distance between the fingerprint chip side is in 0.3mm ~ 0.5mm within range, the spraying agent had both not been spouted the side of fingerprint chip to guaranteed fingerprint module complete machine installation performance, spraying agent also can not with after toasting hide and spout the upper cover adhesion together, dismantle hide when spouting the upper cover, just can not cause the fingerprint module the fingerprint chip surface bursts the limit, thereby makes fingerprint chip outward appearance is complete.

Wherein, the interval distance range between the edge of the second opening and the side surface of the fingerprint chip is 0.2 mm-0.3 mm. When the spacing distance between the edge of the second opening and the fingerprint chip is small, the fingerprint chip is difficult to accurately place in the through hole in the process of spraying the spraying agent on the fingerprint module, and when a process error exists, the fingerprint chip is easy to damage, and the error compatibility of the spraying jig is poor; when the spacing distance between the edge of the second opening and the fingerprint chip is large, the fingerprint module is subjected to a spraying agent spraying process, and the spraying agent is easily sprayed to the area of the bottom structural part of the fingerprint chip, so that the whole installation performance of the fingerprint module is influenced. When the spacing distance between the edge of the second opening and the side face of the fingerprint chip is within the range of 0.2 mm-0.3 mm, the fingerprint chip is more easily and accurately placed into the through hole, the error inclusion of the spraying jig is better, the fingerprint chip is not easily damaged, and when the fingerprint module is subjected to a spraying agent spraying process, the spraying agent cannot be sprayed to the area of the bottom structural part of the fingerprint chip, so that the whole installation performance of the fingerprint module is ensured.

Wherein the inner surface of the through-hole is a concave surface. For the situation that the spraying agent is seriously adhered to the shielding spraying upper cover after being baked to cause edge breakage on the surface of the fingerprint chip, the inner surface of the through hole can be designed into a concave surface, and under the structure, in the direction from the first surface to the second surface, more sections of the inner surface of the through hole are larger than the interval distance between the fingerprint chips, so that the phenomenon that the spraying agent is adhered to the shielding spraying upper cover can be improved.

Wherein the inner surface of the through-hole is convex. For the condition that the spraying agent is easily sprayed to the side surface of the fingerprint chip and the bottom structure part area of the fingerprint chip, the inner surface of the through hole can be designed to be a convex surface.

The blocking and spraying base comprises a base body and a boss arranged on the base body, and the fingerprint module is fixed on the boss so that the fingerprint chip protrudes out of the first surface. The existence of boss makes will the fingerprint module is placed when in the spraying tool, the fingerprint chip can bulge in the first surface, more be favorable to right the paint spraying is carried out to fingerprint chip upper surface.

The boss comprises a bearing surface, the bearing surface is the surface of the boss far away from the base body, the bearing surface is positioned on one side of the second surface far away from the first surface and is arranged at an interval with the second surface, and the interval distance between the bearing surface and the second surface is less than or equal to 0.05 mm. When the fingerprint module is placed in the containing space of the spraying jig, the circuit board of the fingerprint module is placed between the boss bearing surface and the second surface, and when the spacing distance between the boss bearing surface and the second surface is less than or equal to 0.05mm, the circuit board is fixed between the boss bearing surface and the second surface and can not move, so that the camera module is integrally fixed and can not move, and the spraying process of the spraying agent is facilitated.

The spraying jig further comprises a compensation structure, the compensation structure is arranged between the boss and the circuit board, and the compensation structure is used for preventing the boss from damaging the circuit board. The boss is of a convex structure and can possibly cause extrusion damage to the circuit board, and the compensation structure is arranged between the boss and the circuit board, so that the damage condition can be effectively prevented.

Wherein the inner surface of the through hole is provided with an anti-adhesion film layer for preventing the spraying agent from being adhered to the inner surface of the through hole. The anti-adhesion film layer can effectively prevent the spraying agent from being adhered to the inner surface of the through hole, so that the spraying agent is prevented from being adhered to the spraying covering cap after being baked, and the appearance of the fingerprint chip is complete.

The through holes are used for accommodating a plurality of fingerprint chips to be sprayed. Be provided with a plurality of through-holes on the spraying tool, can be simultaneously to a plurality of the spraying of treating the fingerprint chip carries out the spraying agent spraying, has improved work efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a spraying jig 100 according to an embodiment of the present application.

Fig. 2 is a front view of the spray jig 100 shown in fig. 1.

Fig. 3 is a top view of the spray jig 100 shown in fig. 1.

Fig. 4 is a schematic perspective view illustrating a fingerprint module 200 accommodated in the spraying jig 100 according to an embodiment of the present disclosure.

Fig. 5 is a partial cross-sectional view of the structure shown in fig. 4 in the direction a-a.

Fig. 6 is a partially enlarged view of fig. 5 at the region I.

Fig. 7 is a partially enlarged view of the spraying jig 100 provided in the embodiment of the present application at the I region in one embodiment.

Fig. 8 is a partially enlarged view of the spraying jig 100 provided in the embodiment of the present application at an I region in another embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, fig. 1 is a schematic perspective view of a spraying jig 100 according to an embodiment of the present disclosure.

Fig. 2 is a front view of the spray jig 100 shown in fig. 1.

Fig. 3 is a top view of the spray jig 100 shown in fig. 1.

The application embodiment provides a spraying tool 100 is used for fingerprint module 200's surface coating, spraying tool 100 includes shelters from and spouts upper cover 10 and hides and spouts base 20, it closes to hide and spouts base 20 to hide to spout upper cover 10, hide to spout upper cover 10 and hide to spout base 20 and mutually support in order to form the accommodation space, it includes keeping away from to hide to spout upper cover 10 and spout base 20 first surface 101 and with the relative second surface 102 that sets up of first surface 101, and hide to spout upper cover 10 and be equipped with the through-hole 11 that runs through first surface 101 and second surface 102, through-hole 11 communicates with each other with the accommodation space. When carrying out surface coating to fingerprint module 200, wherein, treat that fingerprint module 200 of spraying processing includes circuit board 210 and locates the fingerprint chip 220 on the circuit board 210, places fingerprint module 200 in spraying tool 100, and wherein, circuit board 210 sets up in the accommodation space, and fingerprint chip 220 accepts in through-hole 11, and protrusion in first surface 101.

It can be understood that can be provided with a plurality of through-holes 11 on hiding and spraying upper cover 10, can be used to accept a plurality of fingerprint chips 220, when carrying out spraying agent spraying technology promptly, can place a plurality of fingerprint modules 200 simultaneously in spraying tool 100, that is to say, can once only carry out the spraying to the fingerprint chip 220 of a plurality of fingerprint modules 200, save the time, improve work efficiency. Meanwhile, the shielding and spraying base 20 can be any supporting piece meeting the functional requirements, and is not limited to the structure shown in the attached drawings.

It should be noted that the spraying jig 100 provided in the embodiment of the present application is not limited to performing surface spraying on the fingerprint module 200, and can also perform surface spraying on other products, and is not limited to paint spraying processes, but also can be used for any other spraying agent spraying processes meeting the corresponding requirements, and therefore, description is not repeated here, and for convenience, detailed description is performed on the fingerprint module 200 surface paint spraying processes in the embodiment of the present application.

Referring to fig. 5 and 6 together, fig. 5 is a partial cross-sectional view of the structure of fig. 4 in the direction a-a.

Fig. 6 is a partially enlarged view of fig. 5 at the region I.

In the spraying jig 100 provided by the embodiment of the application, the through hole 11 penetrates through the first surface 101 and the second surface 102 of the spraying cover 10, wherein the through hole 11 forms a first opening at the first surface 101, the through hole 11 forms a second opening at the second surface 102, the inner surface 110 of the through hole 11 connects the edge of the first opening and the edge of the second opening, the fingerprint chip 220 includes a side surface opposite to the inner surface of the through hole 11, and the spacing distance between the edge of the first opening and the side surface of the fingerprint chip 220 is greater than the spacing distance between the edge of the second opening and the side surface of the fingerprint chip 220.

When the spraying tool 100 that will provide by the embodiment of this application is used for the paint spraying technology of fingerprint module 200, because the spacing distance between first open-ended edge and the fingerprint chip 220 side, be greater than the spacing distance between second open-ended edge and the fingerprint chip 220 side, make paint can not spout the side of fingerprint chip 220 and fingerprint chip 220 bottom structure region, fingerprint module 200 complete machine installation performance has been guaranteed, and paint also can not with hide the adhesion of spraying upper cover 10 after toasting together, when dismantling and hiding and spraying upper cover 10, just also can not cause fingerprint module 200's fingerprint chip 220 surface to collapse the limit, thereby make fingerprint chip 220 outward appearance complete.

The first surface 101 is a surface of the spray-shielding cover 10 away from the spray-shielding base 20, and the second surface 102 is a surface of the spray-shielding cover 10 close to the spray-shielding base 20. The second opening is included in the vertical projection of the first opening on the second surface 102, and it can be understood that, when the fingerprint chip 220 is received in the through hole 11, on any vertical plane including the structural center point of the fingerprint chip 220 and perpendicular to the first surface 101 and the second surface 102, the distance between the edge of the first opening and the fingerprint chip 220 is greater than the distance between the edge of the second opening and the fingerprint chip 220.

In one embodiment, the edge of the first opening is spaced from the side of the fingerprint chip 220 by a distance in a range of 0.3mm to 0.5 mm. That is, when the fingerprint module 200 is placed in the spraying jig 100 for the paint spraying process, the distance between any position of the edge of the first opening and the fingerprint chip 220 is within the above-mentioned distance range.

It can be understood that, when the spacing distance between first open-ended edge and the fingerprint chip 220 side is less than 0.3mm, when painting fingerprint chip 220, paint can be attached to fingerprint chip 220 and hide between spraying the upper cover 10, after toasting paint, paint can solidify and with hide spraying the upper cover 10 adhesion together, before carrying out follow-up process flow, need dismantle spraying tool 100 and take out fingerprint module 200, because paint with hide spraying the upper cover 10 adhesion together, when dismantling and hiding spraying the upper cover 10, the paint of spraying in fingerprint chip 220 side can be because of the solidification effort, along with hide the edge that sprays the upper cover 10 and break away from fingerprint chip 220 and follow the dismantlement, thereby lead to the problem that the paint can appear collapsing the limit on fingerprint chip 220's surface, and then influence fingerprint chip 220's outward appearance integrality.

When the spacing distance between first open-ended edge and the fingerprint chip 220 side is greater than 0.5mm, carry out paint spraying process to fingerprint module 200, paint spouts the side of fingerprint chip 220 easily to influence fingerprint module 200's complete machine installation performance.

To sum up, when the spacing distance between first open-ended edge and the fingerprint chip 220 side is in 0.3mm ~ 0.5mm within range, the side of fingerprint chip 220 had both been spouted to paint to guaranteed the whole quick-witted installation performance of fingerprint module 200, paint also can not with hide after toasting and spout upper cover 10 adhesion together, when dismantling and hiding and spout upper cover 10, just also can not cause the fingerprint chip 220 surface of fingerprint module 200 to collapse the limit, thereby make fingerprint chip 220 outward appearance complete.

In one embodiment, the edge of the second opening is spaced from the side of the fingerprint chip 220 by a distance in a range of 0.2mm to 0.3 mm. That is, when the fingerprint module 200 is placed in the spraying jig 100 for the paint spraying process, the distance between any position of the edge of the second opening and the side surface of the fingerprint chip 220 is within the above-mentioned distance range.

It should be noted that, when the paint spraying process is performed on the fingerprint mold, the fingerprint chip 220 needs to be accommodated in the through hole 11, the shielding spraying upper cover 10 and the shielding spraying base 20 are covered, and when the distance between the edge of the second opening and the side surface of the fingerprint chip 220 is smaller than 0.2mm, the space of the through hole 11 is smaller, the difficulty of accurately placing the fingerprint chip 220 into the through hole 11 is greater, and when a certain process error exists, the fingerprint chip 220 cannot be accurately placed into the through hole 11, which easily causes damage to the fingerprint chip 220.

When the spacing distance scope between second open-ended edge and the fingerprint chip 220 side is greater than 0.3mm, paint spraying process is carried out to fingerprint module 200, and the area of fingerprint chip 220 bottom structure is spouted easily to paint to influence fingerprint module 200's complete machine installation performance.

In conclusion, when the edge of the second opening and the spacing distance between the side surfaces of the fingerprint chip 220 are within the range of 0.2 mm-0.3 mm, the fingerprint chip 220 is more easily and accurately placed in the through hole 11, the error inclusion of the spraying jig 100 is better, the fingerprint chip 220 is not easily damaged, and when the fingerprint module 200 is subjected to a paint spraying process, paint cannot be sprayed to the area of the bottom structural part of the fingerprint chip 220, so that the whole machine installation performance of the fingerprint module 200 is ensured.

By the aforesaid can know, when carrying out the paint spraying to fingerprint module 200, there can be two problems generally, respectively, fingerprint chip 220 surface paint collapses the limit to and the side and the bottom member region that fingerprint chip 220 was spouted easily to paint. However, in an actual manufacturing process, there may be a case where one of the above two problems is more emphasized.

Referring to fig. 7 and 8 together, fig. 7 is a partially enlarged view of a spraying jig 100 provided in an embodiment of the present application at a region I.

In one embodiment, the inner surface 110 of the through-hole 11 is concave. In the case that the adhesion phenomenon between the paint and the spraying cover 10 is serious after the paint is baked, and the surface of the fingerprint chip 220 is more likely to be cracked, the inner surface 110 of the through hole 11 may be designed to be a concave surface, wherein the inner surface 110 of the through hole 11 is a concave surface, and it can be understood that an included angle between a tangent plane of the inner surface 110 and the first surface 101 decreases in a direction from the first surface 101 to the second surface 102. Under the structure, in the direction from the first surface 101 to the second surface 102, more sections of the inner surface 110 of the through hole 11 have larger spacing distance from the fingerprint chip 220, which is beneficial to improving the phenomenon that the paint and the spray-shielding upper cover 10 are adhered together.

In one embodiment, the inner surface 110 of the through-hole 11 is convex. In the case that paint is more easily sprayed on the side surface of the fingerprint chip 220 and the bottom structure region of the fingerprint chip 220, the inner surface 110 of the through hole 11 may be designed to be convex, wherein the inner surface 110 of the through hole 11 is convex, and it is understood that the included angle between the tangent plane of the inner surface 110 and the first surface 101 increases in the direction from the first surface 101 to the second surface 102. With this structure, the distance between the fingerprint chip 220 and more sections of the inner surface 110 of the through hole 11 in the direction from the first surface 101 to the second surface 102 is smaller, which is beneficial to improve the condition that paint is sprayed on the side surface and the bottom structure area of the fingerprint chip 220.

It is understood that the structure of the inner surface 110 of the through hole 11 is not limited to a convex surface and a concave surface, and may be a slant straight surface, a step surface or any other structure meeting the functional requirement, in the case of being able to be manufactured to form the corresponding structure.

In the spraying jig 100 provided in the embodiment of the present application, the shielding and spraying base 20 includes a base 21 and a boss 22 disposed on the base 21, and the fingerprint module 200 is fixed on the boss 22, so that the fingerprint chip 220 protrudes from the first surface 101. The existence of boss 22 makes when placing fingerprint module 200 in spraying tool 100, and fingerprint chip 220 can bulge in first surface 101, more is favorable to carrying out the paint spraying to fingerprint chip 220 upper surface.

The boss 22 includes a bearing surface, the bearing surface is a surface of the boss 22 away from the base 21, the bearing surface is located on a side of the second surface 102 away from the first surface 101, and is spaced from the second surface 102, in an embodiment, a spacing distance between the bearing surface of the boss 22 and the second surface 102 is less than or equal to 0.05 mm. When fingerprint module 200 is placed in the accommodation space of spraying tool 100, fingerprint module 200's circuit board 210 is placed between boss 22 bearing surface and second surface 102, because the thickness of circuit board 210 is generally close to 0.05mm, consequently, when the bearing surface of boss 22 and the spacing distance of second surface 102 is less than or equal to 0.05mm, circuit board 210 is in by fixed state between boss 22 bearing surface and second surface 102, can not take place to remove, and then make camera module monolithic stationary and unmovable, be favorable to going on of paint spraying technology.

In one embodiment, the spray jig 100 further includes a compensation structure (not shown) disposed between the boss 22 and the circuit board 210. When placing fingerprint module 200 in spraying tool 100, put fingerprint module 200 upside down to hiding and spout in the lid 10 earlier usually, make fingerprint chip 220 accept in through-hole 11, then will hide and spout base 20 and hide and spout lid 10 block, at this moment, hide the circuit board 210 that the boss 22 that spouts in the base 20 can support fingerprint module 200, make fingerprint chip 220 keep protrusion in the state of first surface 101, and fingerprint module 200 can not random removal in the accommodation space, however, because boss 22 is convex structure, probably cause certain structural extrusion damage to circuit board 210, set up compensation structure between boss 22 and circuit board 210, then can effectively prevent the emergence of the above-mentioned damage condition. In a specific embodiment, the compensation structure is disposed on the bottom surface of the circuit board 210 and is formed as an integral structure with the circuit board 210, it being understood that the compensation structure includes, but is not limited to, a steel plate structure, and may be any other structure that meets the functional requirements.

In one embodiment, the inner surface 110 of the through-hole 11 is further provided with an adhesion preventing film layer for preventing the spray agent from adhering to the inner surface 110 of the through-hole 11. Wherein, prevent the material of adhesive film layer and the material that hides and spout upper cover 10 is different, prevent that adhesive film layer is made by special material, spraying agent such as paint can't be attached to on preventing adhesive film layer, consequently, set up at the internal surface 110 of through-hole 11 and prevent adhesive film layer, can effectively prevent paint adhesion at the internal surface 110 of through-hole 11 to avoid paint and hide and spout the problem that upper cover 10 adhesion leads to fingerprint chip 220 surface to collapse limit after toasting, make fingerprint chip 220 outward appearance complete.

It can be understood that the spraying jig 100 provided in the embodiment of the present application is not only limited to the paint spraying process of the fingerprint module 200, but also can be applied to the paint spraying process of other equipment components meeting the structural requirements, and the details are not repeated herein.

It should be noted that, in process design and production, due to the limitation of errors or process levels, the verticals in the embodiment of the present invention may not be strictly perpendicular to each other, that is, in the spraying jig 100 provided in the embodiment of the present invention, the mentioned verticals are included angles close to 90 °, but not 90 °, but the errors of the vertical included angles caused by the processes in the spraying jig 100 provided in the embodiment of the present invention should be acceptable to those skilled in the art, and do not affect the achievement of the object of the embodiment of the present invention.

In conclusion, when the spraying tool 100 that will provide with this application embodiment is used for the paint spraying technology of fingerprint module 200, the spacing distance between first open-ended edge and the fingerprint chip 220 side, be greater than the spacing distance between second open-ended edge and the fingerprint chip 220 side, make the paint can not spout the side of fingerprint chip 220 and fingerprint chip 220 bottom structure region, fingerprint module 200 complete machine installation performance has been guaranteed, and the paint also can not spout the upper cover 10 adhesion with hiding after toasting together, when dismantling and spouting the upper cover 10, just also can not cause fingerprint module 200's fingerprint chip 220 surface to collapse the limit, thereby make fingerprint chip 220 outward appearance complete.

The technical features of the above embodiments may be arbitrarily combined, and for the sake of brief description, all possible combinations of the technical features in the above embodiments are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A spraying jig is used for spraying the surface of a fingerprint module, the fingerprint module comprises a circuit board and a fingerprint chip arranged on the circuit board, and is characterized in that the spraying jig comprises a covering upper cover and a covering base, the covering upper cover covers the covering base, the covering upper cover and the covering base are mutually matched to form an accommodating space, the circuit board is arranged in the accommodating space, the covering upper cover comprises a first surface far away from the covering base and a second surface opposite to the first surface, the covering upper cover is provided with a through hole penetrating through the first surface and the second surface, the through hole is communicated with the accommodating space, the fingerprint chip is accommodated in the through hole and protrudes out of the first surface, the fingerprint chip comprises a side face, and the side face is opposite to the inner surface of the through hole, the through hole forms a first opening at the first surface, the through hole forms a second opening at the second surface, the inner surface of the through hole connects the edge of the first opening and the edge of the second opening, and the spacing distance between the edge of the first opening and the side surface is greater than the spacing distance between the edge of the second opening and the side surface.

2. The spraying jig of claim 1, wherein a distance between an edge of the first opening and a side surface of the fingerprint chip is in a range of 0.3mm to 0.5 mm.

3. The spraying jig of claim 1, wherein a distance between an edge of the second opening and a side surface of the fingerprint chip is in a range of 0.2mm to 0.3 mm.

4. The spray coating jig of claim 1, wherein the inner surface of the through hole is a concave surface.

5. The spray coating jig of claim 1, wherein the inner surface of the through hole is convex.

6. The spraying jig of claim 1, wherein the spraying shielding base comprises a base body and a boss arranged on the base body, and the fingerprint module is fixed on the boss so that the fingerprint chip protrudes out of the first surface.

7. The spraying jig of claim 6, wherein the boss comprises a bearing surface, the bearing surface is a surface of the boss away from the base, the bearing surface is disposed on a side of the covering upper cover where the second surface is located and spaced from the second surface, and a spacing distance between the bearing surface and the second surface is less than or equal to 0.05 mm.

8. The spraying jig of claim 6, further comprising a compensation structure, wherein the compensation structure is disposed between the boss and the circuit board, and the compensation structure is used for preventing the boss from damaging the circuit board.

9. The spraying jig according to claim 1, wherein the inner surface of the through hole is provided with an adhesion-preventing film layer for preventing the spraying agent from adhering to the inner surface of the through hole.

10. The spraying jig of claim 1, wherein the number of the through holes is plural, and the plural through holes are used for accommodating plural fingerprint chips to be sprayed.