Fingerprint identification device and electronic equipment

Abstract

The utility model discloses a fingerprint identification device and electronic equipment. The fingerprint identification device comprises a mounting frame, a cover plate and a fingerprint module. A through hole is formed in the middle of the mounting frame, a bearing step is arranged at the top of the inner side wall of the mounting frame and comprises a step bottom face and step side faces, and the step bottom face is connected with the step side faces and the inner side wall of the mounting frame. The cover plate is carried on the bottom surface of the step; the height of the step side face in the axial direction of the through hole is a first height, the height of the cover plate in the axial direction of the through hole is a second height, the first height is larger than the second height, and the height difference between the first height and the second height is smaller than or equal to 0.08 mm. The fingerprint module is installed in the through hole and connected with the cover plate in a stacked mode. By adopting the fingerprint identification device provided by the utility model, on one hand, the hand scraping risk is reduced, and good use experience is brought to a user; and on the other hand, the assembly precision and the assembly efficiency between the mounting frame and the cover plate are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fingerprint identification technical field especially, relate to a kind of fingerprint identification device and electronic equipment. BACKGROUND

[0002] Current fingerprint identification device has been widely used in electronic product industry.Fingerprint identification device includes mounting frame, cover plate and fingerprint module.However, the cover plate and the fingerprint module of the existing skirtless fingerprint identification device are installed in the mounting frame, the cover plate is retracted relative to the mounting frame and forms a large step height, which increases the risk of scratching the hand and reduces the user experience. SUMMARY

[0003] Therefore, one purpose of the utility model is to provide a fingerprint identification device and electronic equipment to solve the technical problem that the cover plate and the fingerprint module of the existing skirtless fingerprint identification device are installed in the mounting frame, the cover plate is retracted relative to the mounting frame and forms a large step height, which increases the risk of scratching the hand and reduces the user experience.

[0004] In the first aspect, the utility model embodiment provides a fingerprint identification device, which includes a mounting frame, a cover plate and a fingerprint module. The middle part of the mounting frame is provided with a through hole, and the top of the inner side wall of the mounting frame is provided with a bearing step. The bearing step includes a step bottom surface and a step side surface, and the step bottom surface is connected with the step side surface and the inner side wall of the mounting frame. The cover plate is mounted on the step bottom surface. The height of the step side surface in the axial direction of the through hole is a first height, the height of the cover plate in the axial direction of the through hole is a second height, the first height is greater than the second height, and the height difference between the first height and the second height is less than or equal to 0.08 mm.

[0005] In combination with the first aspect, in some implementations of the first aspect, in the projection plane perpendicular to the axial direction of the through hole, the width of the step bottom surface in the radial direction of the through hole is a first width, the width of the mounting frame in the radial direction of the through hole is a second width, and the ratio of the first width to the second width is 0.35-0.55.

[0006] In combination with the first aspect, in some implementations of the first aspect, the top of the mounting frame is provided with a guide inclined surface and a circular arc surface. The circular arc surface is provided as one, and the circular arc surface is connected to the guide inclined surface and the outer side wall of the mounting frame or the step side surface. Alternatively, the circular arc surface is provided as two, one of the circular arc surfaces is connected to the guide inclined surface and the outer side wall of the mounting frame, and the other circular arc surface is connected to the guide inclined surface and the step side surface.

[0007] In some implementations of the first aspect, in a projection plane perpendicular to an axial direction of the through hole, a width of the guide slope in a radial direction of the through hole is a third width, a width of each of the circular arc surfaces in the radial direction of the through hole is a fourth width, and a ratio of the third width to the fourth width is 1.5-2.0.

[0008] In some implementations of the first aspect, the guide slope forms an angle with a horizontal plane, and the angle is 5-25 degrees.

[0009] In some implementations of the first aspect, the guide slope is provided with a texture structure.

[0010] In some implementations of the first aspect, the step bottom surface is provided with a glue storage groove.

[0011] In some implementations of the first aspect, the step bottom surface is provided with a glue overflow groove in communication with the glue storage groove.

[0012] In some implementations of the first aspect, the fingerprint identification device further comprises an adjusting member, and the cover plate is mounted on the step bottom surface through the adjusting member.

[0013] In the second aspect, the utility model provides a kind of electronic equipment, including body and the fingerprint identification device as described above, and the fingerprint identification device is installed on the body.Thereby, since electronic equipment has the fingerprint identification device as described above, so that electronic equipment has good use experience.

[0014] The fingerprint identification device and the electronic equipment provided by the utility model are based on that bearing step is arranged on the top of the inner side wall of the mounting frame, the bearing step includes step bottom surface and step side surface, the step bottom surface is connected with the step side surface and the inner side wall of the mounting frame, the cover plate is mounted on the step bottom surface, the height of the step side surface in the axial direction of the through hole is the first height, the height of the cover plate in the axial direction of the through hole is the second height, the first height is greater than the second height, and the height difference between the first height and the second height is less than or equal to 0.08mm, on the one hand, the step difference precision between the mounting frame and the cover plate is improved, the risk of scratching hand is reduced, and good use experience is brought to users;On the other hand, the bearing step can play a positioning role for the assembly of the cover plate, and the assembly precision and assembly efficiency between the mounting frame and the cover plate are improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0016] Figure 1 is a structural schematic diagram of an electronic device provided by the embodiments of the present application.

[0017] Figure 2 is Figure 1 is a cross-sectional view of a first embodiment of a fingerprint identification device of the electronic device in

[0018] Figure 3 is Figure 1 is a cross-sectional view of a second embodiment of a fingerprint identification device of the electronic device in

[0019] Figure 4 is Figure 1 is a cross-sectional view of a third embodiment of a fingerprint identification device of the electronic device in

[0020] Main drawing mark explanation: electronic device-100; body-10; fingerprint identification device-20; mounting frame-21; through hole-211; bearing step-212; step bottom surface-2121; step side surface-2122; glue storage groove-2123; glue overflow groove-2124; matching structure-2125; guide inclined surface-213; circular arc surface-214; texture structure-215; limiting step-216; cover plate-22; fingerprint module-23; first adhesive layer-24; second adhesive layer-25; adjusting piece-26; bearing part-261; abutting part-262; positioning structure-2621; display screen-30; axial direction-X; radial direction-Y; circumferential direction-Z; first height-H1; second height-H2; first width-W1; second width-W2; third width-W3; fourth width-W4; included angle-α.

[0021] The following specific embodiments will further illustrate the present application in combination with the above drawings. Specific embodiments

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] It can be understood that the terms in the description and claims of the utility model and the above drawings are only for describing specific embodiments and not to limit the utility model. The terms "first", "second" and the like in the description and claims of the utility model and the above drawings are used to distinguish different objects and not to describe a specific order. Unless the context clearly indicates otherwise, the singular forms "a" and "said" are also intended to include the plural forms. The term "includes" and any variations thereof are intended to cover non-exclusive inclusion. In addition, the utility model can be realized in many different forms and is not limited to the embodiments described in the embodiments. The purpose of providing the following specific embodiments is to facilitate a clearer and more thorough understanding of the disclosure of the utility model, and the words indicating directions such as up, down, left, right, etc. are only for the position of the shown structure in the corresponding drawings. In the description of the utility model, it should be noted that, unless otherwise specifically stated and limited, the terms "mounting", "connection", "connection", "arranged on" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] The subsequent description of the specification is a preferred embodiment for implementing the utility model, however, the above description is for the purpose of illustrating the general principles of the utility model, and is not intended to limit the scope of the utility model. The protection scope of the utility model shall be subject to the appended claims.

[0025] Please refer to Figure 1 , Figure 1 The structure schematic diagram of the electronic equipment 100 provided by the embodiment of the utility model is shown in the figure. The electronic equipment 100 can include but is not limited to mobile phone, tablet computer, digital camera, multimedia player, electronic book reader, notebook computer, vehicle-mounted device, door lock device or wearable device and other devices with fingerprint identification device 20. It can be understood that in order to make those skilled in the art better understand the electronic equipment 100, the utility model takes the mobile phone as an example to explain in detail. It should be noted that the electronic equipment 100 is a mobile phone for illustration only, and the utility model is not specifically limited, for example, the product type of the electronic equipment 100 can also be set according to actual needs.

[0026] Exemplarily, in the embodiment, the electronic equipment 100 includes the body 10 and the fingerprint identification device 20. The fingerprint identification device 20 is mounted on the body 10. Therefore, the electronic equipment 100 can realize the unlocking function through the fingerprint identification device 20, and improve the security and convenience of the use of the electronic equipment 100.

[0027] In some embodiments, the electronic device 100 further comprises a display screen 30. The display screen 30 is mounted on the front face of the body 10. The fingerprint identification device 20 is mounted on the front face of the body 10 and exposes the display screen 30. Specifically, the body 10 is sealingly and fixedly connected with the display screen 30 to realize the packaging of the fingerprint identification device 20. The fingerprint identification device 20 is at least partially accommodated in the accommodating cavity formed by the body 10 and the display screen 30. Of course, in some embodiments, the fingerprint identification device 20 can also be mounted on the back face of the body 10, and the mounting position of the fingerprint identification device 20 is not limited in the embodiments of the present application.

[0028] Please refer to Figure 2 , Figure 2 is Figure 1 the cross-sectional view of the first embodiment of the fingerprint identification device 20 of the electronic device 100 in The fingerprint identification device 20 comprises a mounting frame 21, a cover plate 22 and a fingerprint module 23. The middle part of the mounting frame 21 is provided with a through hole 211. The top of the inner side wall of the mounting frame 21 is provided with a bearing step 212. The bearing step 212 comprises a step bottom surface 2121 and a step side surface 2122. The step bottom surface 2121 is connected with the step side surface 2122 and the inner side wall of the mounting frame 21. The cover plate 22 is mounted on the step bottom surface 2121. The height of the step side surface 2122 in the axial direction X of the through hole 211 is a first height H1, and the height of the cover plate 22 in the axial direction X of the through hole 211 is a second height H2. The first height H1 is greater than the second height H2, and the height difference between the first height H1 and the second height H2 is less than or equal to 0.08mm. The fingerprint module 23 is mounted in the through hole 211 and is connected in layers with the cover plate 22.

[0029] The fingerprint identification device 20 provided by the embodiments of the present application is based on that the bearing step 212 is arranged on the top of the inner side wall of the mounting frame 21, the bearing step 212 comprises the step bottom surface 2121 and the step side surface 2122, the step bottom surface 2121 is connected with the step side surface 2122 and the inner side wall of the mounting frame 21, the cover plate 22 is mounted on the step bottom surface 2121, the height of the step side surface 2122 in the axial direction X of the through hole 211 is the first height H1, the height of the cover plate 22 in the axial direction X of the through hole 211 is the second height H2, the first height H1 is greater than the second height H2, and the height difference between the first height H1 and the second height H2 is less than or equal to 0.08mm. On the one hand, the step difference precision between the mounting frame 21 and the cover plate 22 is improved, the risk of scratching hands is reduced, and good user experience is brought to users. On the other hand, the bearing step 212 can play a positioning role in the assembly of the cover plate 22, and the assembly precision and efficiency between the mounting frame 21 and the cover plate 22 are improved.

[0030] It should be noted that Figure 2The purpose of the first height H1 and the second height H2 is only to illustratively describe the arrangement mode among the mounting frame 21, the cover plate 22 and the fingerprint module 23, and is not a specific limitation on the connection position, the connection relationship and the specific structure of each element. Figure 2 The structure of the fingerprint identification device 20 is only illustrative of the embodiments of the present application, and does not constitute a specific limitation on the fingerprint identification device 20. In other embodiments of the present application, the fingerprint identification device 20 can include more or fewer components than those shown, or combine certain components, or different components, for example, the fingerprint identification device 20 can also include but is not limited to reinforcing steel sheets, circuit boards, connecting air and the like. Figure 2

[0031] For the accuracy of the description, please refer to Figure 2 The term "axial direction X" refers to the arrangement direction of the cover plate 22 and the fingerprint module 23, and is parallel to the central axis of the through hole, that is, the up-down direction. The term "radial direction Y" refers to the radial direction of the through hole 211. The term "radial direction Y" refers to the direction around the central axis of the through hole 211. Among them, the axial direction X, the radial direction Y and the circumferential direction Z together constitute three orthogonal directions of the through hole 211. For the convenience of description, the axial direction X, the radial direction Y and the circumferential direction Z in the present application are relative positions, and do not constitute a limitation on the implementation. The axial direction X, the radial direction Y and the circumferential direction Z of the through hole 211 can be customized according to the specific structure of the product and the perspective of the drawing, and the present application does not make a specific limitation.

[0032] It can be understood that when the height difference between the first height H1 and the second height H2 is too large, after the cover plate 22 and the fingerprint module 23 are installed on the mounting frame 21, the top surface of the cover plate 22 is recessed relative to the top surface of the mounting frame 21, and the step height difference formed with the top surface of the mounting frame 21 is large, thereby easily causing a hand scratching experience when the user operates the fingerprint identification device 20, and possibly making the user feel uncomfortable when placing the finger, reducing the user's experience. When the height difference between the first height H1 and the second height H2 is too small, after the cover plate 22 and the fingerprint module 23 are installed on the mounting frame 21, the top surface of the cover plate 22 is convex relative to the top surface of the mounting frame 21, and the step height difference formed with the top surface of the mounting frame 21 is large, thereby increasing the risk of the cover plate 22 being easily collided, and reducing the aesthetic appearance of the fingerprint identification device 20. The present application sets the appropriate height difference between the first height H1 and the second height H2, thereby reducing the risk of scratching the hand, improving the comfort of the user when placing the finger, meeting the assembly requirements of the cover plate 22 and the mounting frame 21 and the fingerprint module 23, and improving the aesthetic appearance of the fingerprint identification device 20.

[0033] ​It should be noted that the height difference between the first height H1 and the second height H2 can be set according to the specifications of the mounting frame 21, the cover plate 22 and the fingerprint module 23 and other factors, and the embodiments of the present application do not make specific limitations. For example, the first height H1 is greater than the second height H2, and the height difference between the first height H1 and the second height H2 can be, but is not limited to, 0.005mm, 0.02mm, 0.025mm, 0.03mm, 0.035mm, 0.04mm, 0.045mm, 0.05mm, 0.055mm, 0.06mm, 0.065mm, 0.07mm, 0.075mm or 0.08mm.

[0034] The material of the mounting frame 21 includes, but is not limited to, at least one of stainless steel, titanium alloy, aluminum alloy, copper alloy, magnesium alloy, zinc alloy, nickel alloy and plated metal. The material of the cover plate 22 includes, but is not limited to, at least one of sapphire, ceramic, glass cover plate 22. The fingerprint module 23 includes, but is not limited to, one of Land Grid Array (LGA) packaging structure, Ball Grid Array (BGA) packaging structure, Transient Voltage Suppressor (TVS) packaging structure. Exemplarily, in the present embodiment, the mounting frame 21 is configured as a metal frame, the cover plate 22 is configured as a glass cover plate 22, and the fingerprint module 23 is configured as an LGA packaging structure. The mounting frame 21, the cover plate 22 and the fingerprint module 23 can adopt existing materials or packaging processes, and the embodiments of the present application do not make specific limitations.

[0035] The fingerprint module 23 is fixedly connected to the cover plate 22. Exemplarily, in the present embodiment, the fingerprint identification device 20 includes a first adhesive layer 24, and the cover plate 22 and the fingerprint module 23 are fixedly connected through the first adhesive layer 24. The first adhesive layer 24 is configured as a non-conductive adhesive structure. Exemplarily, in the present embodiment, the first adhesive layer 24 is a Direct Film Adhesive (DFA). In some other embodiments, the first adhesive layer 24 can also be, but is not limited to, optical glue or epoxy resin glue.

[0036] The edge of the cover plate 22 is protruded relative to the edge of the fingerprint module 23. Specifically, the orthographic projection of the cover plate 22 on the axial direction X of the through hole 211 is located outside the orthographic projection of the fingerprint module 23 on the axial direction X of the through hole 211, in other words, the orthographic projection of the fingerprint module 23 on the axial direction X of the through hole 211 is located inside the orthographic projection of the cover plate 22 on the axial direction X of the through hole 211. The edge of the cover plate 22 is fixedly connected with the mounting frame 21. For example, in some embodiments, the fingerprint identification device 20 comprises a second adhesive layer 25. The cover plate 22 is fixedly connected with the bearing step 212 through the second adhesive layer 25, thereby improving the sealing and stability of the connection between the cover plate 22 and the mounting frame 21. Of course, in other embodiments, the cover plate 22 can also be fixedly connected with the bearing step 212 through a mounting structure, which is not limited in the embodiments of the present application. The second adhesive layer 25 can be, but is not limited to, direct film adhesive, optical adhesive or epoxy resin adhesive.

[0037] The shape of the through hole 211 can be, but is not limited to, circular, elliptical, square or polygonal, etc. The edge profile of the cover plate 22 is similar to the shape of the through hole 211, thereby facilitating the installation of the cover plate 22 in the through hole. Specifically, the edge profile of the orthographic projection of the cover plate 22 perpendicular to the axial direction X of the through hole 211 can be, but is not limited to, circular, elliptical, square or polygonal, etc.

[0038] In some embodiments, in the projection plane perpendicular to the axial direction X of the through hole 211, the width of the step bottom surface 2121 on the radial direction Y of the through hole 211 is a first width W1, the width of the mounting frame 21 on the radial direction Y of the through hole 211 is a second width W2, and the ratio of the first width W1 to the second width W2 is 0.35-0.55. It should be noted that the smaller the ratio of the first width W1 to the second width W2, the smaller the first width W1 relative to the second width W2, and vice versa. When the ratio of the first width W1 to the second width W2 is too small, the contact area of the cover plate 22 with the step bottom surface 2121 is small, thereby increasing the risk of the cover plate 22 falling off the bearing step 212 and increasing the processing difficulty of the bearing step 212; when the ratio of the first width W1 to the second width W2 is too large, the contact area of the cover plate 22 with the step bottom surface 2121 is large, thereby reducing the flatness of the cover plate 22 lapping on the bearing step 212, increasing the size of the cover plate 22 and increasing the production cost. The present application sets the appropriate ratio of the first width W1 to the second width W2, thereby improving the stability and reliability of the cover plate 22 lapping on the bearing step 212, ensuring the flatness of the cover plate 22, reducing the processing difficulty of the bearing step 212 and reducing the production cost.

[0039] It should be noted that the ratio of the first width W1 and the second width W2 can be set according to the specifications of the fingerprint module 23 and other factors, and the embodiments of the present application do not make specific limitations. For example, the ratio of the first width W1 and the second width W2 can be, but is not limited to, 0.35, 0.4, 0.45, 0.5 or 0.55, etc.

[0040] In some embodiments, the top of the mounting frame 21 is provided with a guide slope 213 and a circular arc surface 214, the circular arc surface 214 is provided as one, and the circular arc surface 214 is connected to the guide slope 213 and the outer side wall or the stepped side surface 2122 of the mounting frame 21. In this way, on the one hand, the guide slope 213 can guide the sliding of the fingers to the area corresponding to the fingerprint module 23 and the cover plate 22, and can also position the fingers, thereby improving the recognition effect and efficiency of the fingerprint module 23; on the other hand, the circular arc surface 214 can reduce the risk of scratching the hand, thereby improving the user's experience of pressing the fingerprint recognition module; and on the other hand, the transition connection of the guide slope 213 and the circular arc surface 214 can reduce the problem of card knife, burr and other problems caused by sharp edges, and make the lines of the fingerprint recognition device 20 more smooth and improve the appearance.

[0041] In some other embodiments, the circular arc surface 214 is provided as two, one of which is connected to the guide slope 213 and the outer side wall of the mounting frame 21, and the other of which is connected to the guide slope 213 and the stepped side surface 2122. In this way, on the one hand, the two circular arc surfaces 214 can reduce the risk of scratching the hand and improve the user's experience of pressing the fingerprint recognition module; on the other hand, it can avoid the problem of scratching caused by sharp corners during assembly of the cover plate 22 and the mounting frame 21, and ensure the recognition yield of the fingerprint module 23.

[0042] In the projection plane perpendicular to the axial direction X of the through hole 211, the width of the guide inclined surface 213 in the radial direction Y of the through hole 211 is a third width W3, and the width of each circular arc surface 214 in the radial direction Y of the through hole 211 is a fourth width W4. The ratio of the third width W3 to the fourth width W4 is 1.5-2.0. If the ratio of the third width W3 to the fourth width W4 is too small, the width of the guide inclined surface 213 relative to the circular arc surface 214 is small, which may make the user feel uncomfortable when placing the finger, reducing the user experience. If the ratio of the third width W3 to the fourth width W4 is too large, the width of the guide inclined surface 213 relative to the circular arc surface 214 is large, thereby increasing the processing difficulty of the circular arc surface 214, and the circular arc surface 214 is prone to cracks and other defects during processing. The present application sets the appropriate ratio of the third width W3 to the fourth width W4, thereby improving the comfort of the user when placing the finger, reducing the processing difficulty of the circular arc surface 214, avoiding the problem of cracks and other defects of the circular arc surface 214 during processing, and improving the product yield.

[0043] It should be noted that the ratio of the third width W3 to the fourth width W4 can be set according to the specifications of the fingerprint module 23 and other factors, and the embodiments of the present application are not limited. For example, the ratio of the third width W3 to the fourth width W4 can be, but is not limited to, 1.5, 1.6, 1.7, 1.8, 1.9 or 2.0, etc.

[0044] In some embodiments, the guide inclined surface 213 forms an angle α with the horizontal plane, and the angle α is 5°-25°. It can be understood that when the inclination angle of the guide inclined surface 213 relative to the horizontal plane is too large, the material flow rate may be too large during the processing of the guide inclined surface 213, causing instability and material accumulation, and the user may feel uncomfortable when placing the finger, reducing the user experience. When the inclination angle of the guide inclined surface 213 relative to the horizontal plane is too small, the material may not flow during the processing of the guide inclined surface 213, increasing the processing difficulty. The present application sets the appropriate size of the angle α, thereby reducing the risk of scratching the hand, improving the comfort of the user when placing the finger, reducing the processing difficulty of the guide inclined surface 213, and improving the product yield.

[0045] Please refer to Figure 2 and Figure 3 , Figure 3 is Figure 1FIG. 6 is a sectional view of a second embodiment of the fingerprint identification device 20 of the electronic device 100. In the second embodiment, the structure of the fingerprint identification device 20 is similar to that of the fingerprint identification device 20 in the first embodiment. The difference is that the guide slope 213 is provided with a texture structure 215. In this way, on the one hand, the texture structure 215 can provide a prompt guiding effect for the user, facilitate the user to quickly identify the position corresponding to the fingerprint module 23, and improve the user experience; on the other hand, the texture structure 215 can also improve the aesthetics of the appearance of the fingerprint identification device 20.

[0046] In the second embodiment, the step bottom surface 2121 is provided with a glue storage groove 2123. In this way, on the one hand, the provision of the glue storage groove 2123 improves the reliability and stability of the connection between the mounting plate and the mounting frame 21; on the other hand, the glue storage groove 2123 is concave relative to the step bottom surface 2121, thereby reducing the occupied space of the glue layer in the axial direction X of the through hole, achieving the miniaturization and thinness of the fingerprint identification device 20, and avoiding the problem of glue overflow to increase the cleaning difficulty, thereby improving the assembly efficiency. The second adhesive layer 25 is entirely arranged in the glue storage groove 2123. Of course, in some embodiments, part of the second adhesive layer 25 is arranged in the glue storage groove 2123, and the remaining part of the second adhesive layer 25 is arranged outside the glue storage groove 2123.

[0047] Exemplarily, in the present embodiment, the glue storage groove 2123 can be configured as a closed loop structure, thereby facilitating the processing and forming of the glue storage groove 2123, and achieving uniform distribution of the glue, thereby improving the reliability and stability of the connection between the mounting plate and the mounting frame 21. Of course, in some embodiments, the glue storage groove 2123 can also be configured as an open loop structure.

[0048] In some embodiments, the step bottom surface 2121 is provided with a glue overflow groove 2124 in communication with the glue storage groove 2123. The glue overflow groove 2124 can be used to collect the glue in the glue storage groove 2123, thereby avoiding the problem of glue overflow to the optical module affecting the recognition accuracy of the fingerprint module 23, and avoiding the problem of glue overflow to increase the cleaning difficulty, thereby improving the assembly efficiency.

[0049] In some embodiments, the bottom of the inner side wall of the mounting frame 21 is provided with a limiting step 216. The fingerprint module 23 is carried on the limiting step 216. In this way, on the one hand, the bearing step 212 can play a positioning role in the assembly of the mounting frame 21 and the fingerprint module 23, thereby improving the assembly accuracy and efficiency between the mounting frame 21, the cover plate 22 and the fingerprint module 23; on the other hand, the provision of the limiting step 216 can improve the step difference accuracy between the mounting frame 21 and the cover plate 22, thereby reducing the risk of scratching the hand and bringing good user experience.

[0050] The fingerprint module 23 and the limiting step 216 can be fixedly connected together through a glue body structure, so as to improve the reliability and stability of the connection between the fingerprint module 23 and the mounting frame 21. Of course, in other embodiments, the fingerprint module 23 and the limiting step 216 can be fixedly connected together through a mounting structure, and the embodiments of the present application are not limited in this regard.

[0051] Please refer to Figure 2 and Figure 4 , Figure 4 is Figure 1 a cross-sectional view of a third embodiment of the fingerprint identification device 20 of the electronic device 100 in

[0052] In some embodiments, the adjusting member 26 can be configured as a glue pad structure, so that the adjusting member 26 can also play a role of a bridge connecting the cover plate 22 and the mounting frame 21. Of course, in other embodiments, the adjusting member 26 can also be configured as a non-glue pad structure, for example but not limited to a metal structure.

[0053] Exemplarily, in the present embodiment, the adjusting member 26 includes a bearing part 261 and an abutting part 262 bently connected to the bearing part 261. The bearing part 261 is arranged between the cover plate 22 and the bearing step 212, and the abutting part 262 abuts between the cover plate 22 and the mounting frame 21. Thus, on the one hand, the bearing part 261 can be used to adjust the step difference formed between the cover plate 22 and the mounting frame 21, thereby reducing the risk of scratching the hand and bringing good user experience. On the other hand, the abutting part 262 can improve the sealing performance of the connection between the cover plate 22 and the mounting frame 21, thereby improving the waterproof and dustproof functions of the fingerprint module 23. Of course, in some embodiments, the adjusting member 26 can omit the abutting part 262, i.e., the adjusting member 26 only includes the bearing part 261.

[0054] In some embodiments, the bearing part 261 is provided with a positioning structure 2621, and the bearing step 212 is provided with a cooperating structure 2125 cooperating with the positioning structure 2621. One of the positioning structure 2621 and the cooperating structure 2125 is configured as a groove structure, and the other one of the positioning structure 2621 and the cooperating structure 2125 is configured as a protrusion structure cooperating with the groove structure, so as to improve the assembly efficiency and assembly yield of the adjusting member 26 and the mounting frame 21.

[0055] The adjusting member 26 can also be fixedly connected with the mounting frame 21 and the cover plate 22 through a glue body structure or a mounting structure. The adjusting member 26 can also be press-connected on the bearing step 212 of the mounting frame 21 through the cover plate 22. The connection arrangement mode of the adjusting member 26 with the mounting frame 21 and the cover plate 22 is not specifically limited in the embodiments of the present application.

[0056] It should be noted that, in the description of the second and third embodiments, the detailed description of the same structure as that of the first embodiment is omitted to avoid repeated description. The structure and connection arrangement mode of each element of the fingerprint identification device 20 in the first embodiment which are the same as those of the fingerprint identification device 20 in the second and third embodiments can be applied to the second and third embodiments, which will not be described here. For example, the structure of the mounting frame 21, the cover plate 22 and the fingerprint module 23 in the third embodiment is the same as that of the mounting frame 21, the cover plate 22 and the fingerprint module 23 in the first embodiment. The structure design of the glue storage groove 2123, the glue overflow groove 2124, the texture structure 215 and the limiting step 216 of the fingerprint identification device 20 in the second embodiment can be applied to the third embodiment.

[0057] The embodiments of the present application are described in detail above, and the principle and implementation mode of the present application are described by applying specific examples. The above embodiment description is only used to help understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A fingerprint recognition device, characterized in that, include: The mounting frame has a through hole in the middle and a load-bearing step on the top of the inner sidewall of the mounting frame. The load-bearing step includes a bottom surface and a side surface, and the bottom surface of the step is connected to the side surface of the step and the inner sidewall of the mounting frame. A cover plate is mounted on the bottom surface of the step; the height of the side of the step in the axial direction of the through hole is a first height, and the height of the cover plate in the axial direction of the through hole is a second height, the first height is greater than the second height, and the height difference between the first height and the second height is less than or equal to 0.08 mm; A fingerprint module is installed in the through hole and is stacked and connected to the cover plate.

2. The fingerprint recognition device as described in claim 1, characterized in that, In the projection plane perpendicular to the axial direction of the through hole, the width of the bottom surface of the step in the radial direction of the through hole is a first width, and the width of the mounting frame in the radial direction of the through hole is a second width. The ratio of the first width to the second width is 0.35-0.

55.

3. The fingerprint recognition device as described in claim 1, characterized in that, The top of the mounting frame is provided with a guide slope and an arc surface. The arc surface is provided as one, and the arc surface is connected to the guide slope and the outer wall of the mounting frame or the side of the step; or, the arc surface is provided as two, one of which is connected to the guide slope and the outer wall of the mounting frame, and the other of which is connected to the guide slope and the side of the step.

4. The fingerprint recognition device as described in claim 3, characterized in that, In the projection plane perpendicular to the axial direction of the through hole, the width of the guide slope in the radial direction of the through hole is the third width, and the width of each arc surface in the radial direction of the through hole is the fourth width, with the ratio of the third width to the fourth width being 1.5-2.

0.

5. The fingerprint recognition device as described in claim 3, characterized in that, The guide slope forms an angle with the horizontal plane, with the opening facing away from the through hole, and the angle is 5°-25°.

6. The fingerprint recognition device as described in claim 3, characterized in that, The guide slope is provided with a textured structure.

7. The fingerprint recognition device as described in claim 1, characterized in that, A glue storage tank is provided on the bottom surface of the step.

8. The fingerprint recognition device as described in claim 7, characterized in that, The bottom surface of the step is provided with an overflow trough that communicates with the glue storage tank.

9. The fingerprint recognition device as described in claim 1, characterized in that, The fingerprint recognition device also includes an adjustment component, and the cover plate is mounted on the bottom surface of the step via the adjustment component.

10. An electronic device, characterized in that, It includes a body and a fingerprint recognition device as described in any one of claims 1-9, wherein the fingerprint recognition device is mounted on the body.

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