Fingerprint Recognition Module and Door Lock

Abstract

The door lock and fingerprint recognition module of the present invention include a first circuit board, a housing, a light guiding element, a second circuit board, a fingerprint recognition chip, and a light source. The first circuit board includes a first surface and a second surface opposite to each other. The housing is disposed on the first surface, and the housing includes an annular housing side wall. The housing side wall and the first surface together define a receiving cavity. The light guiding element is disposed on the first surface and received in the receiving cavity. The light guiding element includes a light guiding side wall and a step extending from the light guiding side wall towards the center of the light guiding element. The light guiding element and the first surface together define a receiving space. The second circuit board includes a mounting portion and a connecting portion connected to each other. The mounting portion is disposed on the step and received in the receiving space, and the connecting portion is electrically connected to the first circuit board. The fingerprint recognition chip is disposed on a side of the mounting portion away from the step and received in the receiving space. The light source is disposed on the first surface and received in the receiving space. The light emitted by the light source in the fingerprint recognition module can be evenly emitted from the light guiding element.

Description

Technical Field

[0001] The present invention relates to the field of biometric technologies, and particularly to a fingerprint recognition module and a door lock. Background Art

[0002] Existing fingerprint recognition modules are widely used in door locks to provide users with a fast and convenient way to unlock the door. In a dark environment, since it is not easy for users to find the position of the fingerprint recognition module, the efficiency of users unlocking the door lock is low. Summary of the Invention

[0003] Embodiments of the present invention provide a fingerprint recognition module and a door lock.

[0004] The fingerprint recognition module according to an embodiment of the present invention includes:

[0005] A first circuit board, the first circuit board including a first surface and a second surface opposite to each other;

[0006] A housing disposed on the first surface, the housing including an annular housing side wall, and the housing side wall and the first surface jointly enclosing a receiving cavity;

[0007] A light guiding element, the light guiding element being disposed on the first surface and received in the receiving cavity, the light guiding element including a light guiding side wall and a step extending from the light guiding side wall towards the center of the light guiding element, and the light guiding element and the first surface jointly enclosing a receiving space;

[0008] A second circuit board, the second circuit board including a connected mounting portion and a connecting portion, the mounting portion being disposed on the step and received in the receiving space, and the connecting portion being electrically connected to the first circuit board;

[0009] A fingerprint recognition chip, the fingerprint recognition chip being disposed on a side of the mounting portion away from the step and received in the receiving space; and

[0010] A light source, the light source being disposed on the first surface and received in the receiving space.

[0011] In the fingerprint recognition module according to the embodiment of the present invention, by providing a light source and a light guide element surrounding the fingerprint recognition chip and the light source, when the light source emits light, the light guide element guides out the light emitted by the light source and indicates the position of the fingerprint recognition chip, so that the user can quickly find the position of the fingerprint recognition chip and perform fingerprint recognition, improving the efficiency of fingerprint recognition. At the same time, the fingerprint recognition chip and the first circuit board are electrically connected together through the second circuit board. Since the volume of the connection part is small, less light emitted by the light source is blocked by the connection part when the light source emits light. Therefore, more light generated by the light source can be projected onto the light guide element, improving the brightness of the light guided out by the light guide element. At the same time, since the volume of the connection part is small, it is convenient to arrange the light source at the center of the accommodation space or near the center of the accommodation space, so that the light emitted by the light source can evenly irradiate the light guide element and enable the light guide element to guide out uniform light.

[0012] In some embodiments, the first circuit board is provided with a through hole penetrating the first surface and the second surface, and the connection part passes through the through hole and is connected to the second surface. The through hole provided on the first circuit board facilitates the electrical connection between the connection part and the first circuit board.

[0013] In some embodiments, the second circuit board is a rigid-flexible circuit board, the mounting part is a rigid board, and the connection part is a flexible board. In this way, it is convenient for the connection part to be electrically connected to the first circuit board.

[0014] In some embodiments, the second circuit board is a flexible circuit board, and both the mounting part and the connection part are flexible boards. In this way, it is convenient for the production of the second circuit board and for the connection part to be electrically connected to the first circuit board.

[0015] In some embodiments, the fingerprint recognition module further includes a line connector and an external connector. After passing through the through hole, the connection part is electrically connected to the first circuit board through the line connector; the external connector is arranged on the second surface. In the fingerprint recognition module of this embodiment, by providing the line connector, it is convenient for the connection part to be electrically connected to the first circuit board; at the same time, by providing the external connector in the fingerprint recognition module, it is convenient for the fingerprint recognition module to be electrically connected to other electronic components.

[0016] In some embodiments, the through hole is opened at the center of the first circuit board, and the number of the light sources is multiple. The multiple light sources are arranged around the through hole. In this way, the light emitted by the multiple light sources can be projected onto the light guide element more evenly, so that the light guided out by the light guide element is more uniform.

[0017] In some embodiments, the sidewall of the housing includes a housing end face away from the first circuit board, and the housing end face is an inclined surface that gradually slopes downward toward the center of the receiving cavity. In this way, when the user presses a finger onto the fingerprint recognition module, it is convenient for the finger to slide onto the fingerprint recognition chip, so that the fingerprint recognition module can more accurately collect the fingerprint information of the finger and improve the fingerprint recognition efficiency.

[0018] In some embodiments, the fingerprint recognition module further includes a reinforcing plate, and the reinforcing plate is disposed between the step and the mounting portion. By providing a reinforcing plate between the mounting portion and the step, the fingerprint recognition module can reduce the deformation generated when the fingerprint recognition chip is pressed, so that the mounting portion can support the fingerprint recognition chip.

[0019] In some embodiments, the fingerprint recognition module further includes a light reflecting element, and the light reflecting element is disposed on the first surface and between the light source and the connecting portion. In this way, the light reflecting element can block the light emitted by the light source from exiting the housing through the through hole; at the same time, when the luminous power of the light source is the same, the brightness of the light guided by the light guiding element is greater.

[0020] In some embodiments, the light reflecting element surrounds the connecting portion, and the reflecting surface of the light reflecting element is a curved surface. In this way, the light emitted by the light source can be reflected by the reflecting surface and projected onto the light reflecting element more evenly, so that the light guided by the light guiding element is more uniform.

[0021] The door lock according to an embodiment of the present invention includes:

[0022] A housing; and

[0023] The fingerprint recognition module according to any one of the above embodiments, and the fingerprint recognition module is mounted on the housing.

[0024] By providing a light source and a light guiding element surrounding the fingerprint recognition chip and the light source in the fingerprint recognition module, when the light source emits light, the light guiding element guides the light emitted by the light source and indicates the position of the fingerprint recognition chip, so that the user can quickly find the position of the fingerprint recognition chip and perform fingerprint recognition, improving the fingerprint recognition efficiency. At the same time, the fingerprint recognition chip and the first circuit board are electrically connected together through the second circuit board. Since the volume of the connecting portion is small, less light emitted by the light source is blocked by the connecting portion, so that more light generated by the light source can be projected onto the light guiding element, improving the brightness of the light guided by the light guiding element; moreover, since the volume of the connecting portion is small, it is convenient to dispose the light source at the center of the receiving space or near the center of the receiving space, so that the light emitted by the light source can evenly irradiate the light guiding element and the light guiding element can guide out uniform light.

[0025] In some embodiments, the door lock further includes a control chip, which is disposed in the housing and electrically connected to the first circuit board. The control chip is configured to control the light source to emit light according to user input, and the light guiding element guides the light emitted by the light source. Thus, when the user does not use the fingerprint recognition module, the light source does not emit light; when the user uses the fingerprint recognition module, the control chip controls the light source to emit light, thereby reducing the power consumption of the fingerprint recognition module.

[0026] Additional aspects and advantages of embodiments of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Newly added drawings are modified, and illustrations in the specification are described.

[0028] Figure 1 is a three-dimensional assembly schematic diagram of a fingerprint recognition module according to some embodiments of the present invention.

[0029] Figure 2 is a three-dimensional exploded schematic diagram of a fingerprint recognition module according to some embodiments of the present invention.

[0030] Figure 3 is a cross-sectional view of a fingerprint recognition module according to some embodiments of the present invention.

[0031] Figure 4 is a cross-sectional view of a fingerprint recognition module according to another embodiment of the present invention.

[0032] Figure 5 is a cross-sectional view of a fingerprint recognition module according to still another embodiment of the present invention.

[0033] Figure 6 is a cross-sectional view of a fingerprint recognition module according to yet another embodiment of the present invention.

[0034] Figure 7 is a cross-sectional view of a fingerprint recognition module according to yet another embodiment of the present invention.

[0035] Figure 8 is a cross-sectional view of a fingerprint recognition module according to yet another embodiment of the present invention.

[0036] Figure 9 is a cross-sectional view of a fingerprint recognition module according to yet another embodiment of the present invention.

[0037] Figure 10 is a cross-sectional view of a fingerprint recognition module according to yet another embodiment of the present invention.

[0038] Figure 11 It is a schematic structural diagram of a door lock according to some embodiments of the present invention. Specific embodiments

[0039] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a connection capable of mutual communication; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0043] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0044] Please refer to Figures 1 to 3 , the fingerprint recognition module 100 according to an embodiment of the present invention includes a first circuit board 10, a housing 20, a light guide element 30, a second circuit board 40, a fingerprint recognition chip 50, and a light source 60. The first circuit board 10 includes a first surface 11 and a second surface 12 opposite to each other. The housing 20 is disposed on the first surface 11. The housing 20 includes an annular housing sidewall 21. The housing sidewall 21 and the first surface 11 together define a receiving cavity 22. The light guide element 30 is disposed on the first surface 11 and received in the receiving cavity 22. The light guide element 30 includes a light guide sidewall 31 and a step 32 extending from the light guide sidewall 31 towards the center of the light guide element 30. The light guide element 30 and the first surface 11 together define a receiving space 33. The second circuit board 40 includes a mounting portion 41 and a connecting portion 42 connected to each other. The mounting portion 41 is disposed on the step 32 and received in the receiving space 33. The connecting portion 42 is electrically connected to the first circuit board 10. The fingerprint recognition chip 50 is disposed on a side of the mounting portion 41 away from the step 32 and received in the receiving space 33. The light source 60 is disposed on the first surface 11 and received in the receiving space 33.

[0045] The connecting portion 42 can be a flexible printed circuit (FPC) so that the mounting portion 41 is electrically connected to the first circuit board 10 through the connecting portion 42. The connecting portion 42 can be connected to the first surface 11; alternatively, the connecting portion 42 can pass through the first circuit board 10 and be connected to the second surface 12. The number of light sources 60 can be one, two, three, or any number. Please refer to Figure 4 , when the number of light sources 60 is one, the light source 60 is disposed at the center position of the first surface 11 (or the center position of the receiving space 33), and the center of the light source 60 and the center of the cross-section of the connecting portion 42 in the thickness direction are on the same straight line to reduce the light blocked by the connecting portion 42 from the light emitted by the light source 60. Please refer to Figure 5 , when the number of light sources 60 is two, the connecting portion 42 can pass through the center of the first surface 11, and the two light sources 60 are respectively disposed on opposite sides of the connecting portion 42, and the center of the light source 60 and the center of the cross-section of the connecting portion 42 in the thickness direction are on the same straight line, and the two light sources 60 are disposed as close as possible to the connecting portion 42 so that the distances from the light sources 60 to the side wall 21 of the housing are substantially equal, so that the light received by the side wall 21 of the housing from the light sources 60 is substantially equal, and further the light guided by the light guiding element 30 is more uniform. For example, the light source 60 is in contact with the connecting portion 42. When the light source 60 emits light, the light guiding element 30 can guide the light emitted by the light source 60, so that the user can determine the position of the fingerprint recognition chip 50 according to the area surrounded by the light guiding element 30 (that is, the fingerprint collection area of the fingerprint recognition chip 50).

[0046] In the fingerprint recognition module 100 according to the embodiment of the present invention, by providing the light source 60 and the light guiding element 30 surrounding the fingerprint recognition chip 50 and the light source 60, when the light source 60 emits light, the light guiding element 30 guides the light emitted by the light source 60 and indicates the position of the fingerprint recognition chip 50, so that the user can quickly find the position of the fingerprint recognition chip 50 and perform fingerprint recognition, improving the efficiency of fingerprint recognition. At the same time, the fingerprint recognition chip 50 and the first circuit board 10 are electrically connected together through the second circuit board 40. Since the volume of the connecting portion 42 is small, less light is blocked by the connecting portion 42 when the light source 60 emits light, so that more light generated by the light source 50 can be projected onto the light guiding element 30, improving the brightness of the light guided by the light guiding element 30; furthermore, since the volume of the connecting portion 42 is small, it is convenient to dispose the light source 60 at the center position of the receiving space 33 or near the center position of the receiving space 33, so that the light emitted by the light source 60 can be evenly irradiated onto the light guiding element 30, and the light guiding element 30 can guide out uniform light.

[0047] Please refer to Figure 2 and Figure 3, the fingerprint recognition module 100 according to the embodiment of the present invention includes a first circuit board 10, a housing 20, a light guiding element 30, a second circuit board 40, a fingerprint recognition chip 50, and a light source 60.

[0048] The first circuit board 10 includes a first surface 11 and a second surface 12 opposite to each other. The first circuit board 10 is provided with a through hole 13 penetrating the first surface 11 and the second surface 12. A connection terminal (not shown in the figure) may be provided on the second surface 12, and the first circuit board 10 may be electrically connected to other electronic components (for example, Figure 11 the control chip 204 shown) through the connection terminal. The first circuit board 10 may be a printed circuit board (PCB), a flexible printed circuit (FPC), or a rigid-flex circuit board.

[0049] The housing 20 includes an annular housing side wall 21, and the housing side wall 21 and the first surface 11 together enclose a receiving cavity 22. The housing side wall 21 may be a columnar structure with an annular end face, and the housing side wall 21 includes a housing end face 211 away from the first circuit board 10. The housing 20 is made of light-impermeable materials. For example, the housing 20 is made of light-impermeable plastics or metal materials. Preferably, the housing 20 in this embodiment may be made of metal materials. For example, the housing 20 may be made of metal materials such as stainless steel, copper, or aluminum. In other embodiments, an installation groove 212 is formed on the outer surface of the housing side wall 21 near the housing end face 211 so that the fingerprint recognition module 100 can be installed on the housing 201 of the door lock 200 (as Figure 11 shown).

[0050] The light guiding element 30 is received in the receiving cavity 22. Specifically, one end face of the light guiding element 30 is supported on the first surface 11. The light guiding element 30 includes a light guiding side wall 31 and a step 32 extending from the light guiding side wall 31 towards the center of the light guiding element 30. The light guiding side wall 31 and the first surface 11 together enclose a receiving space 33. The light guiding side wall 31 is a columnar structure with an annular end face, and the outer diameter of the light guiding side wall 31 is less than or equal to the inner diameter of the housing side wall 21. Preferably, the outer diameter of the light guiding side wall 31 is substantially equal to the inner diameter of the housing side wall 21 to reduce the gap between the light guiding element 30 and the housing 20. The light guiding side wall 31 includes a light guiding end face 311 away from the first circuit board 10. The step 32 may be annular and surround the receiving space 33. The light guiding element 30 may be made of a light guiding material, and the light guiding material includes any one of polystyrene (PS), polycarbonate (PC), and polymethyl methacrylate (PMMA).

[0051] The second circuit board 40 includes a connected mounting portion 41 and a connecting portion 42. The mounting portion 41 is disposed on the step 32 and received in the receiving space 33. The connecting portion 42 passes through the through hole 13 and is connected to the second surface 12 to electrically connect the second circuit board 40 to the first circuit board 10. The second circuit board 40 is a rigid-flexible circuit board. The mounting portion 41 is a rigid board (for example, the mounting portion 41 is a PCB), and the connecting portion 42 is a flexible board (for example, the connecting portion 41 is an FPC). In other embodiments, the connecting portion 41 can also be connected to the first surface 11. In this case, the through hole 13 may not be provided on the first circuit board 10.

[0052] The fingerprint recognition chip 50 is disposed on a side of the mounting portion 41 away from the step 32 and received in the receiving space 33. The fingerprint recognition chip 50 is electrically connected to the first circuit board 10 through the second circuit board 40. The fingerprint recognition chip 50 has a circular sheet-like structure. The diameter of the fingerprint recognition chip 50 is less than or equal to the inner diameter of the light guide outer wall 31. Preferably, the diameter of the fingerprint recognition chip 50 is substantially equal to the inner diameter of the light guide outer wall 31 to reduce the gap between the fingerprint recognition chip 50 and the light guide element 30. The fingerprint recognition chip 50 includes a front surface 51 away from the second circuit board 40. The housing end surface 211, the light guide end surface 311, and the front surface 51 are flush (as Figure 6 shown). The fingerprint recognition chip 50 includes any one of a capacitive fingerprint recognition chip, an ultrasonic fingerprint recognition chip, and an optical fingerprint recognition chip. Preferably, the capacitive fingerprint recognition chip is adopted in the embodiment of the present invention. The fingerprint recognition chip 50 has a land grid array (LGA) structure, and the fingerprint recognition chip 50 can be attached to the mounting portion 41 by surface mount technology (SMT). Please refer to Figure 3 , in other embodiments, when the fingerprint recognition chip 50 is disposed on the light guide element 30, the light guide end surface 311 can also protrude from the front surface 51.

[0053] The light source 60 is disposed on the first surface 11 and received in the receiving space 33. The light source 60 is electrically connected to the first circuit board 10. The number of the light sources 60 can be one, two, three, or any plurality. Please refer to Figure 4 , when the number of the light sources 60 is one, the light source 60 is disposed at the center position of the first surface 11 (or the center position of the receiving space 33), and the center of the light source 60 and the center of the cross section of the connecting portion 42 in the thickness direction are on the same straight line to reduce the light blocked by the connecting portion 42 from the light emitted by the light source 60. The light source 60 can be a top-emitting light-emitting diode (LED) or a side-emitting LED; when the number of the light sources 60 is two, three, or any plurality, the light source 60 can be one or both of a top-emitting LED and a side-emitting LED.

[0054] When the light source 60 emits light, the light guide element 30 can guide out the light emitted by the light source 60, so that the user can determine the position of the fingerprint recognition chip 50 (that is, the fingerprint acquisition area of the fingerprint recognition chip 50) according to the area surrounded by the light guide element 30.

[0055] In the fingerprint recognition chip 50 according to the embodiment of the present invention, first, it is disposed on the mounting portion 41, then the mounting portion 41 is disposed on the step 22, then the light source 60 is disposed on the first circuit board 10, and then the light guide element 30 with the second circuit board 40 and the fingerprint recognition chip 50 mounted thereon is disposed on the first circuit board 10 with the light source 60 mounted thereon and the connecting portion 42 is connected to the first circuit board 10. Finally, the housing 20 is disposed on the first circuit board 10 to complete the assembly of the fingerprint recognition module 100. Alternatively, when assembling the fingerprint recognition module 100, the light source 60 can be first disposed on the first circuit board 10, then the fingerprint recognition chip 50 is disposed on the mounting portion 41, then the mounting portion 41 is disposed on the step 22, and then the light guide element 30 with the second circuit board 40 and the fingerprint recognition chip 50 mounted thereon is disposed on the first circuit board 10 with the light source 60 mounted thereon and the connecting portion 42 is connected to the first circuit board 10. Finally, the housing 20 is disposed on the first circuit board 10 to complete the assembly of the fingerprint recognition module 100.

[0056] In the fingerprint recognition module 100 according to the embodiment of the present invention, by providing the light source 60 and the light guide element 30 surrounding the fingerprint recognition chip 50 and the light source 60, when the light source 60 emits light, the light guide element 30 guides out the light emitted by the light source 60 and indicates the position of the fingerprint recognition chip 50, so that the user can quickly find the position of the fingerprint recognition chip 50 and perform fingerprint recognition, improving the efficiency of fingerprint recognition. At the same time, the fingerprint recognition chip 50 and the first circuit board 10 are electrically connected together through the second circuit board 40. Since the volume of the connecting portion 42 is small, less light emitted by the light source 60 is blocked by the connecting portion 42. Therefore, more light generated by the light source 50 can be projected onto the light guide element 30, improving the brightness of the light guided out by the light guide element 30. Moreover, since the volume of the connecting portion 42 is small, it is convenient to dispose the light source 60 at the center of the accommodation space 33 or near the center of the accommodation space 33, so that the light emitted by the light source 60 can evenly irradiate the light guide element 30 and the light guide element 30 can guide out uniform light.

[0057] The fingerprint recognition module 100 according to the embodiments of the present invention further has the following beneficial effects: First, the housing 20 is made of a metal material. On the one hand, the housing 20 can block the light emitted by the light source 60 to prevent the light from leaking out of the fingerprint recognition module 100 from the side wall 21 of the housing and affecting the normal operation of other electronic components. On the other hand, the housing 20 can shield the fingerprint recognition chip 50 to reduce the electromagnetic interference of the fingerprint recognition chip 50 by other electronic components.

[0058] Second, the end face 211 of the housing, the light guide end face 311 and the front face 51 are flush, making the appearance of the fingerprint recognition module 100 more beautiful.

[0059] Third, the mounting portion 41 is a rigid board, which can reduce the deformation of the fingerprint recognition chip 50 when it is pressed, so as to facilitate the mounting portion 41 to support the fingerprint recognition chip 50.

[0060] Fourth, the through hole 13 is provided on the first circuit board 10 to facilitate the electrical connection between the connecting portion 42 and the first circuit board 10.

[0061] Please refer to Figure 6 In some embodiments, the second circuit board 40 is a flexible circuit board, and both the mounting portion 41 and the connecting portion 42 are flexible boards. In this way, it is convenient to manufacture the second circuit board 40 and to electrically connect the connecting portion 42 and the first circuit board 10.

[0062] Please refer to Figure 7 In some embodiments, the second circuit board 40 is a flexible circuit board, and both the mounting portion 41 and the connecting portion 42 are flexible boards. The fingerprint recognition module 100 further includes a reinforcing plate 80, and the reinforcing plate 80 is disposed between the step 32 and the mounting portion 41. The reinforcing plate 80 is made of a material with a rigidity greater than that of the flexible board. For example, the reinforcing plate 80 can be a steel plate. By providing the reinforcing plate 80 between the mounting portion 41 and the step 32, the fingerprint recognition module 100 can reduce the deformation of the fingerprint recognition chip 50 when it is pressed, so as to facilitate the mounting portion 41 to support the fingerprint recognition chip 50.

[0063] Please refer to Figure 7 In some embodiments, the fingerprint recognition module 100 further includes a line connector 70 and an external connector 71. After passing through the through hole 13, the connecting portion 42 is electrically connected to the first circuit board 10 through the line connector 70. The external connector 71 is disposed on the second surface 12 and is electrically connected to the first circuit board 10. In the fingerprint recognition module 100 of this embodiment, by providing the line connector 70, it is convenient to electrically connect the connecting portion 42 and the first circuit board 10 together; at the same time, by providing the external connector 71, it is convenient to electrically connect the fingerprint recognition module 100 and other electronic components (for example, power supply, Figure 11 the control chip 204 in etc.) together.

[0064] Please refer to Figure 2 and Figure 3 In some embodiments, the through hole 13 is opened at the center of the first circuit board 10, and the number of light sources 60 is multiple. The multiple light sources 60 are arranged around the through hole 13. Preferably, the multiple light sources 60 are equally angularly distributed around the center of the through hole 13. For example, when the number of light sources 60 is two, the two light sources 60 are arranged on opposite sides of the through hole 13, and the centers of the light sources 60 and the center of the through hole 13 are on the same straight line; when the number of light sources 60 is three, the included angle between the connecting lines of the centers of the three light sources 60 and the center of the through hole 13 is 120 degrees. In this way, the light emitted by the multiple light sources 60 can be more evenly projected onto the light guide element 30, so that the light guided out by the light guide element 30 is more uniform.

[0065] Please refer to Figure 7 In some embodiments, the outer shell side wall 31 includes an outer shell end face 211 away from the first circuit board 10, and the outer shell end face 211 is an inclined surface that gradually slopes downward toward the center of the receiving cavity 22. At this time, the light guide end face 311 is flush with the front face 51, and the light guide end face 311 is flush with the inner side of the outer shell end face 211. In this way, when the user presses a finger on the fingerprint recognition module 100, it is convenient for the finger to slide onto the fingerprint recognition chip 50, so that the fingerprint recognition module 100 can more accurately collect the fingerprint information of the finger and improve the fingerprint recognition efficiency.

[0066] Please refer to Figure 8 In some embodiments, the outer shell end face 211 is an inclined surface that gradually slopes downward toward the center of the receiving cavity 22, and the light guide end face 311 is an inclined surface that gradually slopes downward toward the center of the receiving space 33. The inclination slope of the light guide end face 311 is the same as that of the outer shell end face 211. Specifically, the light guide end face 311 is continuous with the outer shell end face 211, that is, the outer side of the light guide end face 311 is flush with the inner side of the outer shell end face 211. The front face 51 is continuous with the light guide end face 311, that is, the outer side of the front face 51 is flush with the inner side of the light guide end face 311. In this way, when the user presses a finger on the fingerprint recognition module 100, it is convenient for the finger to slide onto the fingerprint recognition chip 50, so that the fingerprint recognition module 100 can more accurately collect the fingerprint information of the finger and improve the fingerprint recognition efficiency.

[0067] Please refer to Figure 9In some embodiments, the fingerprint recognition module 100 further includes a reflective element 90, which is disposed on the first surface 11 and between the light source 60 and the connecting portion 42 (or the through hole 13). Specifically, a reflective surface 91 of the reflective element 90 is disposed on a side close to the light source 60, and the reflective element 90 may be a reflector or a reflective film, and the reflective element 90 may be a sheet structure or a ring structure surrounding the connecting portion 42. The reflective element 90 can reflect the light emitted by the light source 60 onto the light guide element 30, so that the reflective element 90 can block the light emitted by the light source 60 from being emitted from the through hole 13 to the outside of the housing 20; at the same time, when the luminous power of the light source 60 is the same, the brightness of the light derived from the light guide element 30 is greater.

[0068] See also Figure 9 and Figure 10 In some embodiments, the fingerprint recognition module 100 further includes a reflective element 90, which is disposed on the first surface 11 and between the light source 60 and the connecting portion 42 (or the through hole 13). The reflective element 90 surrounds the connecting portion 42, and the reflective surface 91 of the reflective element 90 is a curved surface. Specifically, the reflective surface 91 can be a cylindrical curved surface or a concave surface. In this way, the light emitted by the light source 60 can be reflected by the reflective surface 91 and can be projected onto the reflective element 90 more evenly, thereby making the light derived from the light guide element 30 more uniform.

[0069] See also Figure 11 The door lock 200 of the embodiment of the present invention includes a housing 201 and a fingerprint recognition module 100 described in any one of the above embodiments, and the fingerprint recognition module 100 is installed on the housing 201.

[0070] The door lock 200 of the embodiment of the present invention is provided with a light source 60 and a light guide element 30 surrounding the fingerprint recognition chip 50 and the light source 60 in the fingerprint recognition module 100. When the light source 60 emits light, the light guide element 30 guides the light emitted by the light source 60 and indicates the position of the fingerprint recognition chip 50, so that the user can quickly find the position of the fingerprint recognition chip 50 and perform fingerprint recognition, thereby improving the efficiency of fingerprint recognition. At the same time, the fingerprint recognition chip 50 and the first circuit board 10 are electrically connected together through the second circuit board 40. Since the volume of the connecting portion 42 is small, the light blocked by the connecting portion 42 when the light source 60 emits light is small, so that the light generated by the light source 50 can be more projected onto the light guide element 30, thereby improving the brightness of the light guided by the light guide element 30; furthermore, since the volume of the connecting portion 42 is small, it is convenient to set the light source 60 at the center position of the light guide side wall 31 or at the center position close to the light guide side wall 31, so that the light emitted by the light source 60 can be uniformly irradiated on the light guide element 30, and the light guide element 30 can guide uniform light.

[0071] Please continue readingFigure 11 , in some embodiments, the housing 201 includes a door body 202 and a door handle 203 disposed on the door body 202, and the fingerprint recognition module 100 is disposed on the door handle 203. In this way, it is convenient for the user to more quickly find the position of the fingerprint recognition module 100, so that the user can quickly perform fingerprint recognition.

[0072] Please also continue to refer to Figure 11 , in some embodiments, the door lock 200 further includes a control chip 204, the control chip 204 is disposed in the housing 201 and electrically connected to the first circuit board 30, and the control chip 204 is configured to control the light source 60 to emit light according to a user input, and the light guide element 30 guides the light emitted by the light source 60. Specifically, the door lock 200 further includes a detection module (not shown in the figure) electrically connected to the control chip 204, and the detection module can detect whether the user needs to open the door lock 200. The detection module can detect whether there is a user in front of the door lock 200 (for example, when the distance between the user and the door lock 200 is less than or equal to 1 meter), and the detection module determines that the user needs to open the door lock 200. When the detection module detects that there is a user in front of the door lock 200, the detection module sends a user input to the control chip 204, and the control chip 204 controls the light source 60 to emit light according to the user input. At this time, the detection module can include a camera module or a distance detection module. Alternatively, the detection module can detect whether a user touches the door handle 203, and the detection module determines that the user needs to open the door lock 200. When the user touches the door handle 203, the detection module sends a user input to the control chip 204, and the control chip 204 controls the light source 60 to emit light according to the user input. At this time, the detection module 90 can include a temperature detection module, a pressure detection module or a torque detection module. The control chip 204 is electrically connected to the first circuit board 30 through an external connector 71. Before there is no user input, the light source 60 is not lit (does not emit light); when the control chip 204 receives a user input, the control chip 204 can control the light source 60 to emit light (light up) according to the user input. When the light guide element 30 guides the light emitted by the light source 60, the user can determine the position of the fingerprint recognition chip 50. In this way, when the user does not use the fingerprint recognition module 100, the light source 60 does not emit light; when the user uses the fingerprint recognition module 100, the control chip 204 controls the light source 60 to emit light, thereby reducing the power consumption of the fingerprint recognition module 100.

[0073] Please refer to Figure 11 , in some embodiments, when the fingerprint recognition module 100 finishes collecting fingerprint information, the control chip 204 controls the light source 60 to turn off (the light source 60 is not lit) or flash continuously to indicate that the fingerprint recognition module 100 has completed fingerprint collection.

[0074] In some embodiments, the door lock 200 further includes a memory 205 electrically connected to the fingerprint recognition module 100. The memory 205 can store preset fingerprint information. When the fingerprint information collected by the fingerprint recognition module 100 is consistent with the preset fingerprint information, the control chip 204 controls the light source 60 to flash continuously to indicate that the door lock 200 is successfully unlocked. The continuous flashing of the light source 60 means that the light source 60 continuously alternates between being lit and not being lit.

[0075] Please refer to Figure 11 , in some embodiments, the door lock 200 further includes a memory 205 electrically connected to the fingerprint recognition module 100. The memory 205 can store preset fingerprint information. When the fingerprint information collected by the fingerprint recognition module 100 is inconsistent with the preset fingerprint information, the control chip 204 controls the light source 60 to flash continuously to indicate that the door lock 200 fails to unlock. The continuous flashing of the light source 60 means that the light source 60 continuously alternates between being lit and not being lit.

[0076] Please refer to Figure 11 , in some embodiments, the door lock 200 further includes a wireless communication module 206 electrically connected to the fingerprint recognition module 100. The wireless communication module 206 can be electrically connected to a communication terminal (not shown in the figure). The communication terminal includes a mobile phone, a computer, a smart watch, and a router. The communication terminal stores preset fingerprint information. When the fingerprint recognition module 100 collects fingerprint information, the wireless communication module 206 can transmit the fingerprint information to the communication terminal, and the communication terminal can transmit the comparison result of the fingerprint information with the preset fingerprint to the fingerprint recognition module 100 through the wireless communication module 206.

[0077] In the description of this specification, the descriptions referring to the terms "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0078] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fingerprint recognition module, characterized in that, Comprising: A first circuit board, the first circuit board including a first surface and a second surface opposite to each other; A housing disposed on the first surface, the housing including an annular housing side wall, and the housing side wall and the first surface jointly enclosing a receiving cavity; A light guiding element, the light guiding element being disposed on the first surface and received in the receiving cavity, the light guiding element including a light guiding side wall and a step extending from the light guiding side wall towards the center of the light guiding element, and the light guiding element and the first surface jointly enclosing a receiving space; A second circuit board, the second circuit board including a connected mounting portion and a connecting portion, the mounting portion being disposed on the step and received in the receiving space, and the connecting portion being electrically connected to the first circuit board; A fingerprint recognition chip, the fingerprint recognition chip being disposed on a side of the mounting portion away from the step and received in the receiving space; and A light source, the light source being disposed on the first surface and received in the receiving space; a through hole penetrating the first surface and the second surface is formed in the first circuit board, and the connecting portion passes through the through hole and is connected to the second surface; The fingerprint recognition module further includes a reflecting element, the reflecting element being disposed on the first surface and located between the light source and the connecting portion; the reflecting element surrounds the connecting portion, and a reflecting surface of the reflecting element is a curved surface; The through hole is formed in the center of the first circuit board.

2. The fingerprint recognition module according to claim 1, wherein The second circuit board is a rigid-flexible circuit board, the mounting portion is a rigid board, and the connecting portion is a flexible board; or The second circuit board is a flexible circuit board, and both the mounting portion and the connecting portion are flexible boards.

3. The fingerprint recognition module according to claim 1, characterized in that, The fingerprint recognition module further includes a circuit connector and an external connector, the connecting portion passes through the through hole and is electrically connected to the first circuit board through the circuit connector; the external connector is disposed on the second surface.

4. The fingerprint recognition module according to claim 1, characterized in that, The through hole is formed in the center of the first circuit board, the number of the light sources is multiple, and the multiple light sources are disposed around the through hole.

5. The fingerprint recognition module according to claim 1, wherein, The housing side wall includes a housing end face away from the first circuit board, and the housing end face is an inclined surface gradually sloping downward towards the center of the receiving cavity.

6. The fingerprint recognition module according to claim 1, wherein, The fingerprint recognition module further includes a reinforcing plate, and the reinforcing plate is disposed between the step and the mounting portion.

7. The fingerprint recognition module according to claim 1, wherein The reflecting element surrounds the connecting portion, and a reflecting surface of the reflecting element is a curved surface.

8. A door lock, characterized in that, Comprising: A housing; And The fingerprint recognition module according to any one of claims 1-7, the fingerprint recognition module being mounted on the housing.

9. The door lock according to claim 8, characterized in that, The door lock further includes a control chip, the control chip being disposed in the housing and electrically connected to the first circuit board, and the control chip is configured to control the light source to emit light according to a user input, and the light guiding element guides out the light emitted by the light source.

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