RU2793292C1 - Electronic device - Google Patents

Abstract

FIELD: fingerprint recognition.

SUBSTANCE: electronic fingerprint recognition device consists of a middle frame provided with a function key, and the hole for obtaining a fingerprint is located on the side surface of the middle frame; a fingerprint reader extending through the fingerprint receiving hole, the fingerprint reader including a mounting structure and contacting the first function key; and a locking block disposed on the side of the fingerprint opening adjacent to the first function key and connected to the middle frame, the locking block including a restrictive wall which is disposed in the mounting structure.

EFFECT: ensuring of the reliable fastening of the fingerprint recognition device on the side panel of the electronic device.

20 cl, 19 dwg

Description

This application claims priority to Chinese Patent Application No. 201910383509.1 filed by the National Intellectual Property Administration of China on May 09, 2019 and entitled "ELECTRONIC DEVICE", which is hereby incorporated by reference in its entirety.

The field of technology to which the invention belongs

The present application relates to the field of electronic devices and, more specifically, to an electronic device provided with a side-mounted fingerprint reader.

State of the art

With the continuous rise in popularity of full-size screens, the layout and installation of fingerprint readers (called side fingerprint readers) on the sides of electronic devices has been applied. However, locating the fingerprint readers on the side of the electronic device results in an unnecessarily large number of keys on the side, affecting the compactness and appearance of the electronic device. Also, adding any key may require adjusting the positions of function keys such as the volume key and the power key. This causes inconvenience in the daily use of the device by users and detracts from their experience.

Disclosure of the essence of the invention

The present application is an electronic device. The side fingerprint reader and the function key are integrated into a single unit and form a lock assembly. By the joint action of the side fingerprint reader and the blocking unit, the amount of movement of the side fingerprint reader is limited within a certain range, realizing the functions of the side fingerprint reader and the function key, and preventing the side fingerprint reader from moving relative to the originally designed position (for example, side the fingerprint reader moves towards the outside of the fingerprint opening by an excessively large amount of movement). Thus, the side fingerprint reader on the electronic device can be well secured.

According to the first approach, an electronic device is represented, the electronic device comprising:

a middle frame, which is provided with a first function key rigidly connected to the middle frame, in which the fingerprint hole is located on the side surface of the middle frame;

a fingerprint reader extending through the fingerprint acquisition hole, where the fingerprint reader includes a mounting structure and contacts the first function key; And

a locking assembly located on the side of the fingerprint opening near the first function key and rigidly connected to the middle frame, where the locking assembly includes a restriction wall and a partial area of the restriction wall is inserted into the installation structure; in the first direction, the size of the partial area is smaller than the size of the moving space, and the moving space contains a mounting structure space on the side of the fingerprint opening near the first function key; in the second direction of the first plane and/or in the third direction of the first plane, the size of the restrictive wall is larger than the size of the fingerprint opening; the first direction is perpendicular to the side surface of the middle frame, the first plane is parallel to the side surface of the middle frame, the second direction is the thickness direction of the middle frame, and the third direction is perpendicular to the second direction.

According to the electronic device provided in this embodiment of the present application, the lock assembly on the side of the fingerprint opening near the function key is disposed in the electronic device, the mounting structure is disposed in the fingerprint reader, and the boundary wall portion of the locking assembly is inserted into the mounting structure. . In the movement space formed by the installation structure space on the side of the fingerprint opening near the first function key, in the direction perpendicular to the side surface of the middle frame, the size of the movement space is larger than the size of the partial area of the boundary wall inserted into the installation structure. In addition, in the thickness direction of the middle frame and/or in the direction perpendicular to the thickness direction of the middle frame and parallel to the side surface of the middle frame, the size of the boundary wall is larger than the size of the fingerprint opening. This can ensure that the fingerprint reader only moves under the action of an external force in the movement space of the installation structure, so as to limit the movement amount of the fingerprint reader to a certain range, realize the functions of the fingerprint reader and the function key, and prevent the fingerprint reader from moving. relative to the originally designed position (for example, moving the fingerprint reader out of the fingerprint opening by an excessively large amount of movement). Thus, the fingerprint reader can be well fixed on the electronic device.

Alternatively, the fingerprint reader includes a fingerprint reader, a flexible printed circuit board, and a stiffener. The fingerprint recognition unit and the stiffener are respectively attached to two opposite surfaces of the flexible circuit board. The mounting structure is located between the surface of the stiffener near the first function key and the surface of the fingerprint recognition unit attached to the flexible circuit board.

Alternatively, the flexible printed circuit board includes a first part and a second part. The first part is located between the fingerprint recognition unit and the stiffener. The first part contains an additional area protruding from the first end of the fingerprint recognition unit. The second part protrudes from the end of the additional area into the inner part of the middle frame and is rigidly connected to the middle frame.

Therefore, according to the electronic device provided in this embodiment of the present application, an additional area protruding from the end (for example, the first end) of the fingerprint reader is added to the first part of the flexible circuit board, and the additional area can make the first part of the flexible printed circuit board had a certain excess length. When the fingerprint reader is repeatedly pressed, the first part of the flexible circuit board has a larger swing radius with the movement of the fingerprint reader to reduce the deformation of the first part, thus reducing the possibility of failure due to fatigue of the flexible circuit board and increasing the service life of the flexible circuit board. .

Alternatively, the fingerprint reader additionally has a protective film. The protective film is attached to the first area on the surface near the first part of the fingerprint recognition unit and the first area is located near the first end of the fingerprint recognition unit.

Therefore, according to the electronic device provided in this embodiment of the present application, at a position close to the first end of the fingerprint recognition unit, the protective film is attached to the surface of the first part of the flexible circuit near the fingerprint recognition unit. This can prevent the flexible circuit board from rubbing against the edge of the fingerprint opening in the area near the first end of the fingerprint recognition unit during movement, thereby increasing the service life of the flexible circuit board.

Alternatively, the fingerprint reader further comprises a protruding element located on the surface of the stiffening element facing the first function key, and the protruding element contacts the first function key.

Alternatively, the stiffener surface facing the first function key comprises a middle region and two end regions, and the middle region is provided with a protruding stiffener element; And

the fingerprint recognition device further comprises an elastic element located at each of the end regions, and when either end of the fingerprint recognition device is pressed, the elastic element located at the end comes into close contact with the middle frame.

Therefore, according to the electronic device provided in this embodiment of the present application, elastic elements are located at both ends of the stiffener. They fill the gap between the stiffener and the middle frame. In addition, since the elastic member has good resilience, when one end of the fingerprint reader is pressed, the corresponding end elastic member is compressed and comes into close contact with the middle frame, performing a good support and restraint role. When the pressure is released, the elastic member returns the fingerprint reader to its place and the elastic member returns to its initial state, aligning with the middle frame. This can effectively help avoid the one-sided lifting problem caused by pressing one end of the fingerprint reader, thereby improving the stability of the fingerprint reader.

Alternatively, the resilient element is foam.

Alternatively, the middle frame is further provided with a second function key, wherein the second function key and the first function key are grouped in a third direction and the projecting member contacts both the first function key and the second function key.

Therefore, according to the electronic device provided in this embodiment of the present application, two function keys (for example, the first function key and the second function key) are disposed on the middle frame, and the two function keys both contact the projecting member located on the stiffener, forming a supporting structure with a gap. This support structure has higher stability and can effectively avoid the one-sided lifting problem caused by pressing one end of the fingerprint reader, thereby improving the stability of the fingerprint reader.

Alternatively, the surface of the stiffener facing the first function key is a stepped surface, wherein the stepped surface comprises a concave region and a convex region, and the protruding element is located on the concave region.

Therefore, according to the electronic device provided in this embodiment of the present application, the surface of the stiffener facing the function key is set as a stepped surface having a concave region and a convex region, and the protruding member is positioned on the concave region. This makes it possible to integrate the fingerprint reader and the function key into a single unit, thereby reducing the gap between the stiffener and the middle frame provided with the function key, and improving the stability of the fingerprint reader when one end of the fingerprint reader is pressed or clicked.

Alternatively, each of the two ends of the stiffener is formed as an outwardly extending grip-shaped structure, and the mounting structure is positioned between the surface of each grip-shaped structure facing away from the first function key and the surface of the fingerprint recognition unit attached to the flexible circuit board. .

Therefore, according to the electronic device provided in this embodiment of the present application, the end of the stiffener is designed as an outwardly extending grip-shaped structure, and the mounting structure is located between the surface of the grip-shaped structure facing away from the function key and the surface of the fingerprint recognition unit. fingers attached to a flexible printed circuit board. On the one hand, machining is simple, which can effectively reduce costs and improve processing efficiency. On the other hand, the design is more stable and can cooperate well with the blocking block, making the limiting function more stable.

Alternatively, the flexible printed circuit board includes a first part and a second part. The first part is located between the fingerprint recognition unit and the stiffener. The first part contains an additional area protruding from the first end of the fingerprint recognition unit. The second part protrudes from the end of the additional area into the inner part of the middle frame and is rigidly connected to the middle frame.

An end of the stiffener proximal to the first end of the fingerprint recognition unit is formed as a U-shaped structure, and two edges of the U-shaped structure extend outward in a third direction. The installation structure includes a space formed by the inner surface of the U-shaped structure.

Therefore, according to the electronic device provided in this embodiment of the present application, the end of the stiffener proximal to the first end of the fingerprint recognition unit is arranged as a U-shaped structure, and the end of the U-shaped structure proximate to the flexible circuit board is equivalent to adding protective layer between the blocking block and the first part of the flexible circuit board, thereby reducing the possibility that the exposed area of the first part of the flexible circuit board, proximate to the stiffener but not attached to the stiffener, comes into contact with the blocking block, thus protecting the flexible printed circuit board.

Alternatively, the surface of the raised element facing the first function key is a stepped surface, wherein the stepped surface includes a convex region and a concave region, and the convex region contacts the first function key.

Therefore, according to the electronic device provided in this embodiment of the present application, the two ends of the projection member surface facing the function key are arranged according to the concave region, and the convex region in the middle contacts the function key. When the fingerprint reader is pressed, the additional contact between the function key projection surface and the function key fixing support member can be reduced, thus reducing the unstable contact between the support member and the middle frame, improving the stability of the function key, and improving operation stability. electronic device.

Alternatively, the protruding member is made from a non-metallic material.

Therefore, according to the electronic device provided in this embodiment of the present application, the projecting member is made of a non-metallic material. Unlike the metal material, when the fingerprint reader is pressed, the contact between the projection made of non-metal material and the function key can effectively reduce damage to the function key when the projection is pressed on the function key.

Alternatively, the fingerprint reader comprises a substrate, a contact region of the substrate is provided with a plurality of contact areas, and the contact region comprises a side region near the end of the contact region and a middle region excluding the side region. The area of each pad in the side region is larger than the area of each pad in the middle region.

Therefore, according to the electronic device provided in this embodiment of the present application, the area of each pad in the side region in which the contact is susceptible to failure is increased so that the area of each pad in the side region is larger than the area of the pad in the remaining areas. This can increase the pad contact area in the side region and reduce internal stress, thereby improving the pressing resistance and fatigue strength of the pad in the side region, thereby increasing the service life of the pad and further improving the reliability of the fingerprint reader.

Alternatively, the fingerprint reader comprises a substrate, a contact region of the substrate is provided with a plurality of contact areas, and the contact region comprises a side region near the end of the contact region and a side region excluding the side region. The number of pads in the side area is greater than the number of pads in the middle area.

Therefore, according to the electronic device provided in this embodiment of the present application, the number of pads on the side where the pad is susceptible to failure is increased to increase the number of pads corresponding to each signal, so that when the pad for one and of the same signal is damaged, another pad corresponding to the signal could be used normally, thus increasing the life of the pad on the substrate as a whole, and further improving the reliability of the fingerprint reader.

Alternatively, the first function key is the power key.

Therefore, in accordance with the electronic device provided in this embodiment of the present application, in some scenarios, for example, in a scenario in which the position of the power key is most similar to the position of such a key in a typical handheld device of the user, or in a scenario in which the power key is a single key that integrates the power key and the fingerprint reader into a single unit, which can effectively improve the user experience and simplify the design.

Alternatively, the stiffener is made of steel.

Alternatively, the blocking block is made of steel.

Brief description of the drawings

Fig. 1(a) is a schematic block diagram of a partial area of an electronic device according to an embodiment of the present application;

fig. 1(b) is a schematic structural diagram of a middle frame on a yz plane corresponding to an embodiment of an embodiment of the present application;

fig. 2 is a cross-sectional view of a partial area of an electronic device on the xy plane according to an embodiment of the present application;

fig. 3 is a cross-sectional view of a partial area of an electronic device on the xy plane according to an embodiment of the present application;

fig. 4(a) is a three-dimensional schematic representation of a fingerprint reader according to an embodiment of the present application;

fig. 4(b) is a schematic representation of an xy plane fingerprint reader according to an embodiment of the present application;

fig. 5(a) is a three-dimensional schematic representation of a blocking block according to an embodiment of the present application;

fig. 5(b) is a schematic representation of a blocking block on the xy plane according to an embodiment of the present application;

fig. 6 is a three-dimensional schematic representation of a structure for interaction between a fingerprint reader and a blocking unit according to an embodiment of the present application;

fig. 7(a) is a cross-sectional view of an xy-plane fingerprint reader according to an embodiment of the present application;

fig. 7(b) is an xy-plane representation of a stiffener according to an embodiment of the present application;

fig. 8 and FIG. 9 are schematic representations of a stiffener in the xy plane corresponding to an embodiment of the present application;

fig. 10(a) is a schematic representation of a state diagram of a flexible circuit board when the fingerprint reader is not pressed according to an embodiment of the present application;

fig. 10(b) is a schematic representation of a state of a flexible circuit board when the fingerprint reader is pressed according to an embodiment of the present application;

fig. 11 is a three-dimensional schematic representation of a fingerprint reader according to an embodiment of the present application;

fig. 12(a) is a schematic representation of a yz plane fingerprint reader according to an embodiment of the present application;

fig. 12(b) is a schematic representation of an xy plane fingerprint reader according to an embodiment of the present application;

fig. 13(a) is a schematic representation of a stiffener in the xy plane corresponding to an embodiment of the present application;

fig. 13(b) is a schematic representation of a structure for interaction between a stiffener, a protruding member, and an elastic member on an xy plane according to an embodiment of the present application;

fig. 14 is a schematic representation of a structure for interaction between a stiffener, a protruding member, and an elastic member on the xy plane, according to an embodiment of the present application;

fig. 15(a) is a cross-sectional view of a partial area of an electronic device having two function keys on an xy plane according to an embodiment of the present application;

fig. 15(b) and FIG. 15(c) is a schematic representation of a structure for interaction between a stiffener and a protrusion on the xy plane according to an embodiment of the present application;

fig. 16 is a schematic representation of a partial area of an electronic device on the xy plane according to an embodiment of the present application;

fig. 17(a) is a schematic representation of a projecting element on the xy plane corresponding to an embodiment of the present application;

fig. 17(b) is a schematic representation of a protrusion on the yz plane corresponding to an embodiment of the present application;

fig. 18(a) is a schematic representation of a stiffener in the xy plane according to an embodiment of the present application;

fig. 18(b) is a schematic representation of a protrusion on the yz plane corresponding to an embodiment of the present application; And

fig. 19 is a schematic representation of an xy plane substrate according to an embodiment of the present application.

Implementation of the invention

The technical solutions of the present application are described below with reference to the accompanying drawings.

The electronic device in the embodiments of the present application may be various possible devices provided with a side fingerprint reader. For example, an electronic device may be a mobile phone, tablet, watch, wearable device, and the like.

In FIG. 1(a) is a schematic block diagram of a partial area of an electronic device according to an embodiment of the present application. In FIG. 1(b) is a schematic block diagram of a middle frame on the yz plane according to an embodiment of the present application. As shown in FIG. 1, the electronic device includes a middle frame 101, a function key 102 (such as a volume key or a power key), and a side fingerprint reader 130. Optionally, the electronic device further comprises a screen 103. The side surface of the middle frame 101 includes a fingerprint opening 1011 and a function key opening 1012 (such as a volume key opening or a power key opening). The function key 102 is mounted on the middle frame 101 through the function key hole 1012, and the side fingerprint reader 130 is mounted on the middle frame 101 through the fingerprint acquisition hole 1011.

For ease of description, the coordinate systems of the accompanying drawings in the embodiments of the present application are first described. Each two of the x, y and z directions are perpendicular to each other. The z direction may be understood as the thickness direction of the middle frame (or electronic device), the y direction may be understood as the width direction of the middle frame (or electronic device), and the x direction may be understood as the length direction of the middle frame (or electronic device). Alternatively, the y direction may be understood as the length direction of the middle frame (or electronic device) and the x direction may be understood as the width direction of the middle frame (or electronic device). For example, in this embodiment of the present application, to describe the construction of the electronic device, an example is used in which the y direction is the length direction of the middle frame and the x direction is the width direction of the middle frame.

As described in the Background section, in this embodiment of the present application, the location of the fingerprint reader on the side of the electronic device results in too many keys on the side, which affects the size and appearance of the electronic device, as well as attractiveness to user.

Based on this, according to an embodiment of the present application, the side fingerprint reader and a function key such as a volume key or a power key are integrally integrated, that is, the user can press the side fingerprint reader to realize the functions both fingerprint recognition and function key. It should be understood that in order to allow the side fingerprint reader to have both a fingerprint recognition function and a function key function, it is necessary that, when pressed, the side fingerprint reader has some amount of movement possible and the amount of movement can allow the function key to be pressed. , thus realizing the function of a function key.

For ease of description, the side fingerprint reader is generally described as a fingerprint reader. Unless otherwise specified, the fingerprint reader described below is a side fingerprint reader.

In order to ensure the overall strength of the electronic device according to this embodiment of the present application, the fingerprint reader can be assembled on the electronic device by the outside mounting method, that is, the fingerprint reader is placed inside the middle frame from the outside of the middle frame through the opening to obtain fingerprint located on the side surface of the middle frame so as to assemble the fingerprint reader. With this assembly method, only such a space should be cut out in the middle frame that will be occupied by the fingerprint reader, thus guaranteeing the overall strength of the electronic device as much as possible. With this assembly method, since the fingerprint reader is installed from the outside of the middle frame to the inside, if the fingerprint reader is not installed or fixed properly on the electronic device, any external force may cause the fingerprint reader to move from the originally designed position, making it impossible to reach purposefully combining the fingerprint reader and the function key into a single unit, and seriously affecting the reliability of the electronic device.

Therefore, in view of integrating the side fingerprint reader and the function key into a single unit and installing the fingerprint reader from outside to inside, the embodiment of the present application further provides a structure for limiting the side fingerprint reader on the electronic device: the fingerprint reader contacts the functional key, the locking unit is disposed in the electronic device, and the installation structure is disposed in the fingerprint reader. Through the combined action of the blocking block and the installation structure, the fingerprint reader can move in the limited space of the installation structure when pressed to limit the movement amount of the fingerprint reader to a certain range, realizing the functions of the fingerprint reader and the function key, and preventing the reader from moving. fingerprints relative to the originally designed position (for example, the fingerprint reader moves outward from the fingerprint opening by an excessively large amount of movement). Thus, the fingerprint reader can be well fixed in the electronic device.

Next, with reference to FIG. 1 and FIG. 14 describes in detail the electronic device according to this embodiment of the present application.

In FIG. 2(a) and FIG. 2(b) shows cross-sectional views of a partial area of an electronic device on an xy plane corresponding to an embodiment of the present application. In FIG. 3 is a cross-sectional view of a partial area of an electronic device on the xy plane according to an embodiment of the present application. In FIG. 4 shows a fingerprint reader according to an embodiment of the application. In FIG. 4(a) is a schematic three-dimensional view of a fingerprint reader according to an embodiment of the present application. In FIG. 4(b) schematically shows an xy-plane fingerprint reader according to an embodiment of the present application. In FIG. 5(a) shows a three-dimensional view of a blocking block according to an embodiment of the present application. In FIG. 5(b) schematically shows an xy-plane blocking block according to an embodiment of the present application. In FIG. 6 shows a 3D view of the interaction between the fingerprint reader and the blocking unit according to an embodiment of the present application.

As shown in FIG. 1 and FIG. 2, the electronic device includes a middle frame 101, a fingerprint reader 130, and a blocking block 140. The fingerprint receiving hole 1011 is located on the side surface of the middle frame 101, and the fingerprint reader 130 passes through the fingerprint receiving hole 1011 with a protruding small portion. , helping the user to press the fingerprint reader 130 . The first function key 121 (see Fig. 2) is rigidly connected to the middle frame 101. The fingerprint reader 130 contacts the first function key 121. When the fingerprint reader 130 is pressed, the fingerprint reader 130 presses the first function key 121 to realize fingerprint recognition functions and the function of the first function key.

In this embodiment of the present application, the side surface of the middle frame 101 may be a surface parallel to the yz plane or a surface parallel to the xz plane. For example, the structure of the electronic device is described using an example in which the side surface of the middle frame 101 shown in FIG. 1 is a surface parallel to the yz plane.

It should be noted that the contact between the fingerprint reader 130 and the first function key 121 described in this embodiment of the present application can be understood as contact within the mounting error allowable range, and there may be a slight gap caused by the mounting error. Likewise, the following explanation describing the contact between the two elements is the same as that given here, and again the details are not repeated.

In some electronic devices, the position of the power key is in a position where the position of the power key is most similar to the position of such a key in a typical user's handheld device, for example, the power key is located near the thumb. Also, the power key usually has only one button. Therefore, from the viewpoint of user experience and simplicity of construction, further, the first function key may be a power key.

Next, with reference to FIG. 2-6, the fingerprint reader 130 and the lock unit 140 are described in detail.

Fingerprint recognition device 130

For example, as shown in FIG. 3, the fingerprint reader 130 includes a fingerprint reader, a flexible circuit board 133, and a stiffener 134. The fingerprint recognition unit includes a fingerprint recognition chip 131 and a substrate 132. The fingerprint recognition unit and the stiffener 134 are respectively attached to two opposite surfaces of the flexible circuit board 133, and the stiffener 134 contacts the first function key 121. The mounting structure 136 is located between the surface 1341 stiffener 134 near the first function key 121 and the surface 1321 of the fingerprint recognition unit attached to the flexible circuit board 133.

For example, referring to FIG. 2 and FIG. 4, the fingerprint recognition apparatus 130 includes a fingerprint recognition unit, a flexible circuit board 133, a stiffening member 134, and a protruding member 135. The fingerprint recognition unit includes a fingerprint recognition chip 131 and a substrate 132. The fingerprint recognition unit and the stiffening member 134 are respectively attached to two opposite surfaces of the flexible printed circuit board 133. The protruding element 135 is located on the surface 1341 of the stiffener 134 near the first function key 121. The protruding element 135 contacts the first function key 121. The installation structure 136 is located between the surface 1341 of the stiffening element 134 near the first function key 121 and a surface 1321 of the fingerprint recognition unit attached to the flexible circuit board 133.

In other words, unlike the fingerprint reader shown in FIG. 3, the fingerprint reader shown in FIG. 2 and FIG. 4 further includes a protruding member 135 located on the stiffener 134, and the protruding member 135 contacts the first function key 121.

Alternatively, the protruding member 135 is made from a non-metallic material. The non-metallic material may be a material having a softer surface hardness than metal and little resilience, such as plastic, rubber, or TPU, such that the function key is difficult to be damaged when the projecting member presses the function key.

Alternatively, the stiffener 134 is made of steel to increase the strength of the fingerprint recognition device 130.

It should be understood that the location of the accommodating structure 136 between the surface 1341 of the stiffener 134 and the surface 1321 of the fingerprint recognition unit is only an example for description and should not be construed as limiting this embodiment of the present application, provided that the accommodating structure is located in any possible location in fingerprint reader. For example, the mounting structure 136 may alternatively be positioned between the surface 132 of the substrate attached to the fingerprint recognition chip 131 and the surface 1341 of the stiffener 134.

For ease of description, for example, the electronic device in this embodiment of the present application is described in detail using an example in which the fingerprint reader in the remaining accompanying drawings has a protruding member. Naturally, when element designs are not associated with a raised element, such element designs can be applied to a fingerprint reader design that does not include a raised element, and all of these designs are within the protection scope of embodiments of the present application.

Alternatively, to simplify the assembly of the fingerprint reader from the outside to the inside, the size of the stiffener 134 on the yz plane is smaller than the size of the fingerprint reader on the yz plane.

For example, as shown in FIG. 4, the fingerprint recognition unit includes a fingerprint recognition chip 131 and a substrate 132. The fingerprint recognition chip 131 is attached to the substrate 132. between the substrate 132 and the stiffener 134 and the two opposite surfaces of the first part 1331 are respectively attached to the surface of the stiffener 134 and to the surface of the substrate 132 to rigidly connect the substrate 132, the flexible circuit board 133 and the stiffener 134. The second part 1332 extends from the end of the first part 1331 to the inside of the middle frame 101 and is rigidly connected to the middle frame 101 to realize the electrical connection of the fingerprint reader 130. For example, the fingerprint recognition chip 131, the substrate 132, the flexible circuit board 133, and the stiffener 134 may be bonded together with a heat shrink adhesive or the like.

For example, as shown in FIG. 2 i. 4, the protruding member 135 contacts the first function key 121 so that when the fingerprint reader 139 is pressed, the protruding member 135 presses the first function key 121 to initiate the first function key 121 and achieve the two-in-one effect of the function of the device 130. fingerprint recognition and the function of the first function key 121. As shown in FIG. 4, the mounting structure 136 is located between the surface 1341 of the stiffener 134 near the first function key 121 and the surface 1321 of the substrate 132 (that is, the surface of the fingerprint recognition unit attached to the flexible circuit board 133). The mounting structure 136 includes a mounting structure 136-A and a mounting structure 136-B. The surface 1341 of the stiffener 134 is the surface facing the first function key 121, which may have a surface of any shape, such as a plane or a curved surface, for example. For example, as shown in FIG. 4, the surface 1341 is a stepped surface, the two ends in the Y direction are the convex regions of the stepped surface, and the middle is the concave region of the stepped surface.

Block block 140

For example, as shown in FIG. 2-6, the lock block 140 is located on the side of the fingerprint opening 1011 near the first function key 121, and the lock block 140 is rigidly connected to the middle frame 101 and includes a boundary wall 141. A partial area of the boundary wall 141 (for example, the partial area contains region 141-A region and region 141-B) are inserted into the installation structure 136. In addition, in the first direction (that is, in the x direction), the size of the partial region of the boundary wall 141 is smaller than the size of the movement space, and the movement space contains space for mounting structure 136 on the side of the fingerprint opening 1011 near the first function key 121. ) of the first plane, the size of the restrictive wall 141 is larger than the size of the fingerprint opening 1011. The first direction is perpendicular to the side surface of the middle frame 101, the first plane is parallel to the side surface of the middle frame 101, the second direction is the thickness direction of the middle frame 101, and the third direction is perpendicular to the second direction.

Alternatively, the blocking block 140 is made of steel in order to increase the strength of the fingerprint recognition device 130.

The dimension of the boundary wall 141 in the y or z direction may be understood as the maximum dimension of the boundary wall 141. The travel space may be the entire space or a partial space of the mounting structure 136. on the left side of the fingerprint opening 1011, the movement space is a partial space of the installation structure 136. If the surface of the installation structure 136 near the side surface of the middle frame 101 is located on the right side of the fingerprint opening 1011, the movement space is the entire space of the installation structure 136.

Specifically, for example, as shown in FIG. 5 and 6, the interlock block 140 includes a boundary wall 141, a partial area of the boundary wall 141 includes a region 141-A and a region 141-B, and a region 141-A and a region 141-B, respectively, are inserted into the installation structure 136-A and into installation structure 136-B. To allow the fingerprint reader 130 to have a movement amount within a certain range and have a good limiting effect, refer to FIG. 2(b). First, the blocking block 140 is located on the side of the fingerprint opening 1011 near the first function key 121, that is, the blocking block 140 is located on the right side of the fingerprint opening 1011. Second, the dimensions of the region 141-A and the region 141-B of the boundary wall 141, which are inserted into the installation structure 136 in the x direction, are smaller than the dimension of the movement space in the x direction, for example, the dimension of the region 141-A in the x direction shown in fig. 2(b) is equal to L2, the size of the movement space in the x direction is L1, and L2 is smaller than L1, so that the fingerprint reader 130 can move in the movement space. Thirdly, as shown in FIG. 2(b) and 5(b), the dimension L3 of the boundary wall 141 in the y direction is larger than the dimension of the fingerprint aperture 1011 in the y direction and/or the dimension L4 of the boundary wall 141 in the z direction is larger than the dimension of the fingerprint aperture 1011 fingerprint in the z direction so that the stiffener 134 does not move to the left side of the fingerprint receiving hole 1011 to limit the movement range of the fingerprint reader 130 in the direction from the inside to the outside.

It should be understood that the design of each component in an electronic device and the interconnection relationship between the components shown in FIG. 2-6 are only examples for the description and construction of any replacement components that have the same functions as the above components, all fall within the protection scope of the embodiments of the present application. The respective construction of each element is described in detail below.

According to the electronic device provided in this embodiment of the present application, the lock block located on the side of the fingerprint opening in the vicinity of the function key is installed in the electronic device, the mounting structure is located in the fingerprint recognition device, and a partial area of the restriction wall of the block block inserted into the mounting structure. In the movement space formed by the installation structure space on the side of the fingerprint opening near the first function key, in the direction perpendicular to the side surface of the middle frame, the size of the movement space is larger than the size of the partial area of the boundary wall inserted into the installation structure. In addition, in the thickness direction of the middle frame and/or in the direction perpendicular to the thickness direction of the middle frame and parallel to the side surface of the middle frame, the size of the boundary wall is larger than the size of the fingerprint opening. This can ensure that the fingerprint reader only moves under the action of an external force in the movement space of the installation structure, so as to limit the movement amount of the fingerprint reader within a certain range, realize the functions of the fingerprint reader and the function key, and prevent the fingerprint reader from moving. fingers relative to the originally designed position (for example, the fingerprint reader moves outside the fingerprint opening due to excessive movement). Thus, the fingerprint reader can be well fixed on the electronic device.

In this embodiment of the present application, when the mounting structure 136 is located in any area between the surface 1321 of the substrate 132 and the surface 1341 of the stiffener 134, the specific shape of the mounting structure 136 is associated with the specific design of the stiffener 134. Further, in this embodiment of the present application, with reference to FIG. 7-9 describe the stiffener 134 and mounting structure 136 in detail.

In FIG. 7(a) is a cross-sectional view of an xy-plane fingerprint reader according to an embodiment of the present application. In FIG. 7(b) schematically shows an xy-plane stiffener according to an embodiment of the present application.

Alternatively, as shown in FIG. 7, each of the two ends of the stiffener 134 is formed as a claw-shaped structure (clamp-shaped structure 134-A and claw-shaped structure 134-B) facing outward, and the mounting structure 136 is positioned between the surface of each claw-shaped structure facing away from the first function key 121, and the surface of the fingerprint recognition unit attached to the flexible circuit board 133.

In the stiffener shown in Fig. 7, the mounting structure 136 is located between the inner surface of each grip-shaped structure and the surface 1321 of the substrate. Specifically, the mounting structure 136-A is formed in the region between the surface 134-A1 of the grip-shaped structure 134-A and the surface 1321 of the substrate 132, and the mounting structure 136-B is formed in the region between the surface 134-B1 of the grip-shaped structure 134-B and the surface 1331-B of the first portion 1331 of the flexible circuit board 133 in the vicinity of the stiffener 134.

Alternatively, as shown in FIG. 8, at least one end of the stiffener 134 is formed as a U-shaped structure (end 134-A and end 134-B), and the installation structure 136 includes a space formed by the U-shaped structure.

For example, in the stiffener shown in FIG. 8(a), both ends of the stiffener 134 are formed as a U-shaped structure, and the open portion of the U-shaped structure faces outward, that is, the two edges of the U-shaped structure extend outward in the y direction.

In another example, in the stiffener shown in FIG. 8(b), one end of the stiffener 134 is formed as a U-shaped structure, and the open portion of the U-shaped structure faces outward.

In another example, in the stiffener shown in FIG. 8(c), both ends of the stiffener 134 are formed as a U-shaped structure, and the open portion of the U-shaped structure faces inward.

It should be understood that the above stiffeners and mounting structures shown in FIG. 7 and 8 are exemplary for description and should not constitute a limitation to this embodiment of the present application. Any possible other structure within the protection scope of the embodiments of the present application provides that the installation structure can be formed between the stiffener and the substrate. For example, as shown in FIG. 9, at least one groove or hole may be located directly on the stiffener 134. The groove or hole is formed as the mounting structure 136. Accordingly, the area to be inserted into the corresponding mounting structure 136 is located on the blocking block 140.

In this embodiment of the present application, the second part of the flexible circuit board is attached to the middle frame, and the first part is separately attached to the fingerprint recognition unit and the stiffener. The fingerprint reader has a certain amount of movement under the action of an external force in daily use. This design of the flexible circuit board can cause the first part of the flexible circuit board to be deformed by an external force. Especially, when the end area of the fingerprint reader near the second part is repeatedly pressed or clicked, such deformation may be more severe, causing the flexible circuit board to fatigue and break. This seriously reduces the durability and reliability of the flexible circuit board, and affects the reliability of the electronic device.

Therefore, in order to increase the durability and reliability of the flexible circuit board, in this embodiment of the present application, the flexible circuit board has been improved. Alternatively, as shown in FIG. 4, the flexible circuit board 133 includes a first part 1331 and a second part 1332. The first part 1331 is located between the fingerprint recognition unit and the stiffener 134. The first part 1331 includes an additional area 1331-A extending the first end 132-B of the fingerprint recognition unit. The second part 1332 extends from the end of the additional region 1331-A into the middle frame 101 and is rigidly connected to the middle frame 101.

In other words, in the y direction, there is a specific distance length between the end of the additional area 1331-A and the first end 132-B of the fingerprint recognition unit. The additional area 1331-A of the first part 1331 may be considered as a free movement area of the flexible circuit board 133, or may be considered as an excess length of the first part 1331. For example, the length of the elongated area 1331-A in the y direction may be determined based on the amount of movement of the recognizer 130 fingerprints in the x direction.

In FIG. 10(a) is a schematic diagram showing the state of the flexible circuit board when the fingerprint reader is not pressed or clicked according to the embodiment of the present application. In FIG. 10(b) is a schematic diagram showing the state of the flexible circuit when the fingerprint reader is pressed according to an embodiment of the present application. It can be seen that when the bottom end of the fingerprint reader 130 is pressed, the excess length of the elongated region 1331-A can make the swing radius of the first part 1331 of the flexible circuit board 133 larger, thus reducing the possibility of deformation of the first part 1331 and thereby increasing , the service life of the flexible circuit board is 133.

Therefore, according to the electronic device provided in this embodiment of the present application, an additional area extended from the end (for example, the first end) of the fingerprint reader is added to the first part of the flexible circuit board, and the additional area can allow the first part to have a specific excess length. flexible printed circuit board. When the fingerprint reader is repeatedly pressed, the first part of the flexible circuit board has a larger swing radius when the fingerprint reader is moved, so as to reduce the deformation of the first part, thereby reducing the possibility of breakage due to fatigue of the flexible circuit board and increasing the service life of the flexible circuit board.

In a design in which the first part of the flexible circuit has an additional area, there may be another problem. On this basis, appropriate improvements have been made in the embodiments of the present application. The following describes in detail the embodiments of the present application resulting from the following four approaches.

First approach

As shown in FIG. 7, in the structure in which the first portion 1331 of the flexible circuit board 133 has an additional area 1331-A, the mounting structure 136-B is formed in the region between the grip-shaped structure 134-B and the surface 1331-B of the first portion 1331 of the flexible circuit board 133. When the lower end of the fingerprint reader 130 is periodically pressed, the fingerprint reader 130 moves in the direction of the first function key 121, and the first portion 1331 of the flexible circuit board 133 moves in the direction of approaching the first function key 121 with the fingerprint reader 130, so that the open the area of the first part 1331 located near the stiffener 134, but not attached to the stiffener 134 (for example, the open area contains the elongated area 1331-A), became closer to the blocking block 140 and could be in re-contact with the blocking block 140. Therefore, repeated contact and friction between the blocking block 140 with good rigidity and the flexible circuit board 133 which is easily deformed may damage the flexible circuit board 133.

Therefore, as an option, see FIG. 2, 4, and 8(b), where the end (end 134-B) of the stiffener 134 adjacent to the first end 132-B of the fingerprint recognition unit is formed as a U-shaped structure. The two edges of the U-shaped structure extend outward in the third direction (ie, the y direction). The installation structure 136 includes a space formed by a U-shaped structure.

Next, referring to FIG. 10(b), it can be seen that when the lower end of the fingerprint reader is pressed intermittently, the elongated region 1331-A becomes closer to the lock block 140. 133 is equivalent to adding a protective layer between the blocking block 140 and the first part 1331 of the flexible circuit board 133, thus reducing the likelihood that the open area of the first part 1331 of the flexible circuit board 133 attached to the stiffener 134 will come into contact with the blocking block 140 and thus protecting the flexible circuit board 133. It should be noted that although the edge of the U-shaped structure has high rigidity, since the area of the first part of the flexible circuit near the first end of the fingerprint recognition unit is attached separately to the fingerprint recognition unit, and to the U-shaped structure, which can be considered as a whole during the movement, the flexible printed circuit board does not suffer serious damage.

Therefore, according to the electronic device provided in this embodiment of the present application, the end of the stiffener near the first end of the fingerprint recognition unit is arranged as a U-shaped structure, and the end of the U-shaped structure near the flexible circuit board is equivalent to adding protective layer between the blocking block and the first part of the flexible circuit board, thereby reducing the likelihood that the open area of the first part of the flexible circuit board, which is close to the stiffener but not attached to the stiffener, will contact the blocking block, and thus thus protecting the flexible circuit board.

Second approach

When the end of the additional area 1331-A of the fingerprint reader 130 located away from the first portion 1331 of the flexible circuit board 133 is pressed repeatedly, the other end of the fingerprint reader 130 tilts away from the first function key 121, that is, tilts in the direction of approaching the hole 1011 to get a fingerprint. This may squeeze the additional area 1331-A out of the fingerprint opening 1011 a little, causing back and forth friction between the additional area 1331-A and the edge of the fingerprint opening 1011, and shorten the life of the flexible circuit board 130.

Therefore, in order to increase the service life of the flexible circuit board, as an option, referring to FIG. 4(b) and FIG. 11, the protective film 137 is attached to the first area on the surface close to the first part 1331 of the fingerprint recognition unit. The first area approaches the first end 132-B of the fingerprint recognition unit.

The surface near the first part 1331 of the fingerprint recognition unit can be understood as the outer surface of the first part 1331, which is the surface attached to the fingerprint recognition unit. The protective film 137 is attached to the area on the surface proximal to the first end 132-B of the fingerprint recognition unit.

Therefore, at a position close to the first end of the fingerprint recognition unit, the protective film is attached to the surface of the first part of the flexible circuit near the fingerprint recognition unit. This can prevent the flexible circuit board from rubbing against the edge of the fingerprint opening in the area close to the first end of the fingerprint recognition unit during movement, thereby increasing the service life of the flexible circuit board.

Third Approach

Due to the existence of the additional region 1331-A of the flexible circuit board 133, during the swing, the additional region 1331-A is in repeated contact with the end of the stiffener 134 134. The repeated contact between the flexible circuit board 133 made of soft material and the stiffener with good rigidity damages the flexible printed circuit board.

Therefore, alternatively, referring to FIG. 11, an adhesive application process can be performed at a location near the end of the additional area 1331-A of the stiffener 134 and on the end of the stiffener 134 to form a buffer component 139 at the end of the stiffener 134, thereby reducing damage to the stiffener and flexible printed circuit board.

Fourth Approach

The flexible circuit board 133 is attached to the substrate 132 in the fingerprint recognition unit through an adhesive layer. In order to improve the waterproofing performance, it is necessary to reserve a waterproofing adhesive application area on the flexible circuit board 133, and an adhesive application process is performed in the adhesive application area. Due to the existence of the additional area 1331-A of the flex circuit board 133, it is not possible to reserve an adhesive application area at a short edge parallel to the x direction in the additional area 1331-A of the flexible circuit board 133. Therefore, the embodiment of the present application provides the following adhesive application method.

Alternatively, referring to FIG. 12(a), an adhesive application area 1331-B is reserved at the edges on both sides of the flexible circuit board 133 parallel to the y-direction, and adhesive application is performed on the adhesive application areas 1331-B. The use of capillary properties allows the adhesive to completely penetrate between the flexible printed circuit board 133 and the substrate 132, thus realizing a waterproofing between the flexible printed circuit board 133 and the substrate 132.

To allow the adhesive to better penetrate to the short edge, alternatively referring to FIG. 12(b), the end of the substrate 132 close to the additional area 1331-A may be provided with a recess 1322 for storing adhesive with a certain depth in the x direction.

In this embodiment of the present application, the protruding member 135 is located on the stiffener 134 of the fingerprint reader 130, and the protruding member 135 contacts the first function key 121. Due to the design of the contact between the protruding member 135 and the first function key 121, between the stiffener 134 and the middle frame 101 provided with the first function key 121, there is a gap. When one end of the fingerprint reader 130 is pressed, there is likely to be a problem of one-sided lifting forming a reciprocating structure and reducing the stability of the fingerprint reader 130. Therefore, in order to improve the stability of the fingerprint reader 130, this embodiment of the present application provides three possible designs. The following describes these three structures in detail with reference to FIG. 2 and FIG. 13-15.

First design

Alternatively, referring to FIG. 13, the surface 1341 of the stiffener 134 facing the first function key 121 is a stepped surface, and the stepped surface includes a concave region and a convex region, and the protruding member 135 is disposed on the concave region. In FIG. 13, the concave region contains 1341-C and the convex region contains 1341-A and 1341-B.

Therefore, the surface of the stiffener facing the function key is disposed as a stepped surface having a concave region and a convex region, and a protruding member is disposed on the concave region. This can integrate the fingerprint reader and the function key into a whole, thereby reducing the gap between the stiffener and the middle frame provided with the function key, and improve the stability of the fingerprint reader when one end of the fingerprint reader is pressed.

For example, the concave region on the surface 1341 of the stiffener 134 may not be provided with a protruding component 135, and the concave region contacts the first function key 121. In this case, the fingerprint reader and the function key can be integrated into a single unit, thereby reducing the gap between the element rigidity and a middle frame provided with a function key, and improving the stability of the fingerprint reader when one end of the fingerprint reader is pressed.

It should be understood that the design of the stiffener shown in FIG. 13 is only an example for description and should not be a limitation of this embodiment of the present application. Any stiffener design that can satisfy the above conditions falls within the protection scope of this embodiment of the present application.

Second design

The second structure may be developed in conjunction with the first structure, or may be developed separately. Next, as an example, the second construction is described using the combined construction of these two constructions.

Alternatively, as shown in FIG. 2 and FIG. 13, the surface 1341 of the stiffener 134 facing the first function key 121 includes a middle region 1341-C and two end regions (an end region 1341-A and an end region 1341-B), and the middle region 1341-C is provided with a protruding component 135 of the member 134 rigidity; And

the fingerprint reader 130 further includes an elastic member 138 located at each end region, and when either end of the fingerprint reader 130 is pressed, the elastic member 138 located at the end is in close contact with the middle frame 101.

The end region 1341-A is provided with a resilient member 138-A and the end region 1341-B is provided with a resilient member 138-B.

For example, the middle region on the surface 1341 of the stiffener 134 may not be provided with a protruding member 135 and the middle region contacts the first function key 121.

It should be understood that in the process of designing an integrated structure consisting of the first structure and the second structure, for example, the middle region on the stiffener surface 1341 may be used as a concave region, and the end region may be used as a convex region.

In this design, elastic elements are located at both ends of the stiffener. They fill the gap between the stiffener and the middle frame. In addition, since the resilient member has good resiliency, when one end of the fingerprint reader is pressed, the resilient member corresponding to the end is pressed and contacts the middle frame to act as a support and restraint. When pressing is completed, the elastic member resets the fingerprint reader and the elastic member returns to the initial state, aligning with the middle frame. This can effectively help avoid the one-sided lifting problem caused by pressing one end of the fingerprint reader, thereby improving the stability of the fingerprint reader.

Alternatively, the resilient element may be made of foam.

It should be understood that the design of the stiffener shown in FIG. 13 is only an example for description and should not be construed as being limited to this embodiment of the present application. Any stiffener design that can satisfy the conditions provided above falls within the protection scope of this embodiment of the present application. For example, the surface of the stiffener facing the first function key may not necessarily be designed as a stepped surface, but may alternatively be a surface of any other design, provided that the elastic element is located at the end region of the surface. For example, as shown in FIG. 14, the surface 1341 of the stiffening member 134 is a plane, and two end regions are respectively provided with a resilient member 138-A and a resilient member 138-B. Naturally, the protruding member 135 may be located in the middle region.

Third design

Additionally, referring to FIG. 15, the middle frame 101 is further provided with a second function key 122. The second function key 122 and the first function key 121 are grouped in the third direction (i.e., the y direction), and the projection 135 contacts both the first function key 121 and the second function key. key 122.

For example, as shown in FIG. 15(a), the projection 135 may be a double projection, the two ends of the projection of the double projection are both formed as a projection, each projection corresponds to each function key, and each projection contacts a corresponding function key. When designing a raised member, it is recommended that the raised member be located in the middle region with a large stiffener range such that the two raised member structures are as close as possible to the ends of the stiffener.

For example, as shown in FIG. 15(b), the protrusion 135 may alternatively include a first protrusion 135-A and a second protrusion 135-B, each of which is in contact with a respective function key. During the location of the protruding element, it is recommended that two protruding elements are located in the area near the end of the stiffener.

For example, as shown in FIG. 15(c), the protrusion 135 may alternatively be a single protrusion, and the surface of the protrusion facing the function key may be a plane and each end of the surface is in contact with a corresponding function key. Additionally, the first function key 121 and the second function key 122 may be keys that implement the same function, or may be keys that implement different functions. For example, the first function key 121 is a power button and the second function key 122 is a volume key. In another example, both the first function key 121 and the second function key 122 may be volume buttons; one key is a volume key to increase the volume, and the other key is a volume key to decrease the volume.

Therefore, two function keys (for example, the first function key and the second function key) are disposed on the middle frame, and the two function keys both contact the protruding member disposed on the stiffener to form a spaced support structure. This support structure has higher stability and can effectively avoid the problem of one-sided lifting caused by pressing one end of the fingerprint reader, thereby improving the stability of the fingerprint reader.

For example, the surface 1341 of the stiffener 134 may not be provided with a protruding member 135, and the surface 1341 contacts the first function key 121 and the second function key 122. Alternatively, a support structure may be formed with a gap to increase the stability of the fingerprint reader.

In this embodiment of the present application, in a structure in which the fingerprint reader includes a protruding member, the protruding member is used as a key member contacting the function key. For the protruding member, related designs and improvements have been developed based on various considerations.

In this embodiment of the present application, the protrusion and the stiffener may be integrally formed, or the protrusion may be assembled on the stiffener. This is not limited in this embodiment of the present application. In the structure in which the protruding member is assembled on the stiffener, in terms of ease of assembly, further see FIG. 16, the areas of the surface 1351 of the projection 135 facing the first function key 121 can be designed to be larger. That is, the surface area 1351 of the raised member 135 is larger than the surface area 1211 of the first function key 121 in the vicinity of the raised member 135.

Thus, the surface area of the projection element facing the function key is larger than the surface area of the function key near the projection element, so that the size of the projection element is larger, which makes it easier to assemble the projection element on the stiffener.

It should be understood that the structure of the protruding member 135 shown in FIG. 16 is only an example for description, and any design that satisfies the condition that the surface area 1351 of the raised member 135 facing the first function key 121 is larger than the area of the surface 1211 facing the first function key 121 in the vicinity of the raised member 135 falls within the volume protection of this embodiment of the present application. For example, the surface 1351 of the protruding element 135 may be a plane.

Additionally, referring to FIG. 16, the first function key 121 is attached to the middle frame 101 via the support member 123. The support member 123 is stationary when the first function key 121 is pressed and moved. When the surface area 1351 of the protruding member 135 is larger than the area of the surface 1211 of the first function key 121 near the protruding member 135, and when the fingerprint reader 130 is pressed repeatedly, the protruding member 135 can press the support member 123, further increasing the contact between the protruding member 135 and support member 123. This results in unstable contact between the support member 123 and the middle frame 101, and thus leads to instability of the first function key 121 and affects the stability of the electronic device.

Therefore, further referring to FIG. 17, the surface 1351 of the projection 135 facing the first function key 121 is a stepped surface, and the stepped surface includes a convex region 1351-A and a concave region 1351-B. The convex region 1351-A contacts the first function key 121, and in the third direction (that is, the y direction), the concave region 1351-B is located on both sides of the convex region 1351-A.

In other words, in order to reduce additional contact between the surface 1351 of the protruding member 135 and the support member 123, for attaching the first function key 121, both ends of the protruding member 135 may be positioned according to the concave region 1351-B so that the convex region 1351-A contacts the first function key. key 121 to form a protruding member similar to a chevron design.

Therefore, the two ends of the projection surface facing the function key are arranged according to the concave region, and the convex region in the middle contacts the function key. When the fingerprint recognition device is pressed, the additional contact between the function key projection surface and the function key attachment support support member can be reduced, thereby reducing the unstable contact between the support member and the middle frame, and improving the stability of the function key and improving stability of the electronic device.

When the protruding element is assembled on the stiffener, additionally, according to FIG. 18, the stiffening member 134 is provided with a protruding structure 1342 for positioning, and the protruding member 135 is provided with a positioning hole 1352. The protruding member 135 can be secured to the stiffener 134 via an interference fit between the protruding structure 1342 for positioning and the opening 1352 for positioning.

In this embodiment of the present application, the operating state of the structure integrating the fingerprint reader and the function key as a whole is the state in which it is pressed during daily use. Therefore, it is necessary to take into account the pressure resistance and fatigue strength of the pad located on the substrate. The reason is that if the pressing resistance and fatigue strength of the keyboard are poor, the pad may fail, which in turn causes the failure of the fingerprint reader and seriously reduces the reliability of the fingerprint reader.

In order to improve pad performance, in this embodiment of the present application, simulation or real test verification is performed at possible pressing positions of the fingerprint reader to find the pad position that is prone to failure. It has been found that a region (denoted as the side region) near the end of the region (denoted as the contact region) in which the pad is located on the substrate is susceptible to failure. Based on this, in this embodiment of the present application, the characteristics of the pad in the side region can be improved by increasing the area of the pad in the side region. The specific structure for enlarging the pad area in the side area is described in detail below.

In a possible implementation, as an option, according to FIG. 19(a), the contact region includes a side region 1323-A near the end of the contact region and a middle region 1323-B except for the side region 1323-A. The area of each pad in the side area 1323-A is larger than the area of each pad in the middle area 1323-B.

In this design, the area of each pad in the side region in which the pad is susceptible to failure is enlarged so that the area of each pad in the side region is larger than the area of the pad in the remaining area. This can increase the contact area of the pad in the side region and reduce the fatigue stress, thereby improving the pressing resistance and fatigue strength of the pad in the side region, increasing the service life of the pad, and further improving the reliability of the fingerprint reader.

In another possible implementation, as an option, according to FIG. 19(b), the number of pads in the side region 1323-A is larger than the number of pads in the middle region 1323-B.

This design can be considered as an increase in the area of the pad in the side region by increasing the number of pads in the side region. The number of pads for each signal can be added. For example, in the middle area 1323-B, each signal corresponds to one pad, and on the side 1323-A, two pads can be assigned to each signal, so that when one of the pads for one signal is damaged, the other pad is still could support the normal use of the fingerprint reader.

In this design, the number of pads in the side region where a pad is susceptible to failure is increased to increase the number of pads corresponding to each signal, so that when a pad for the same signal is damaged, another pad corresponding to that signal can be used normally, thus increasing the service life of the pad as a whole and further improving the reliability of the fingerprint reader.

The structure of the electronic device provided with the fingerprint reader in the embodiments of the present application has been described in detail above. In the following, a method for assembling a fingerprint reader on an electronic device is briefly described by way of example.

Step 1: Pass the flexible circuit board 133 of the fingerprint reader 130 through the hole 1011 to obtain a fingerprint on the middle frame 101. Step 2: Slide the fingerprint reader 130 into the middle frame 101 until the fingerprint reader 130 (for example , the protruding member 135 or the stiffening member 134 in the fingerprint reader 130) will not come into contact with the function key (for example, the first function key 121 and/or the second function key 122) on the middle frame 101. Step 3: Pull out the flexible circuit board a little. 133 to create space and wait for the next step to mount the interlock block 140. Step 4: Mount the interlock block 140; placing the blocking block 140 on the side of the fingerprint opening 1011 in the vicinity of the function key; inserting a partial area of the restrictive wall 141 of the lock block 140 into the mounting structure 136 of the fingerprint reader 130; and fix the interlock block 140 with screws on the middle frame 101. Step 5: Wrap the flexible circuit board 133 around the interlock block 140, and then connect the flexible circuit board 133 to the main board by bending. Step 6: Accordingly, the two ends of the fingerprint reader 130 are squeezed to check and verify that the fingerprint reader 133 is effectively restrained and fixed on the middle frame 101.

It should be understood that, as described in embodiments of the present application, when an element is "attached" to another element, this means that the element can be directly or indirectly attached to another element. Just as described in the embodiments of the present application, the "connection" between an element and another element can be a direct connection or an indirect connection. As described in the embodiments of the present application, the contact between two elements can be understood as contact within the allowable range of mounting error, and may be a small gap caused by mounting error.

Additionally, it should be understood that, as described in embodiments of the present application, when a direction is "parallel" or "perpendicular" to another direction, this should be understood as "approximately parallel" or "approximately perpendicular".

Unless otherwise specified, "a and/or b" described in the embodiments of the present application contains any of the following three cases: "a", "b", and "a and b".

The above descriptions are merely specific implementations of the present application, but are not intended to limit the scope of protection of the present application. Any change or substitution in the technical scope of this application, easily conceived by a person skilled in the art, should fall within the protection scope of this application. Therefore, the scope of protection of the present application should be subject to the scope of protection of the claims.

Claims (24)

1. An electronic fingerprint recognition device, comprising: a middle frame provided with a first function key connected to the middle frame, and the fingerprint hole is located on the side surface of the middle frame; a fingerprint reader extending through the fingerprint receiving hole, the fingerprint reader including a mounting structure and contacting the first function key; And a blocking block located on the side of the fingerprint opening adjacent to the first function key and connected to the middle frame, the blocking block comprising a boundary wall, and a partial region of the boundary wall is inserted into the installation structure; wherein, in the first direction, the size of the partial area is smaller than the size of the moving space, and the moving space contains a space for accommodating the installation structure on the side of the fingerprint opening near the first function key; in the second direction of the first plane and/or in the third direction of the first plane, the size of the restrictive wall is larger than the size of the fingerprint opening; the first direction is perpendicular to the side surface of the middle frame, the first plane is parallel to the side surface of the middle frame, the second direction is the thickness direction of the middle frame, and the third direction is perpendicular to the second direction. 2. The electronic device according to claim. 1, in which the fingerprint reader contains a fingerprint recognition unit, a flexible printed circuit board and a stiffener; the flexible circuit board is located between the fingerprint recognition unit and the stiffener; wherein, in the first direction, the size of the stiffening element is smaller than the size of the fingerprint recognition unit, so that the fingerprint recognition unit can be installed in the direction from the outside of the middle frame to the inside of the middle frame. 3. The electronic device according to claim. 2, in which the flexible printed circuit board contains the first part and the second part; the first part is located between the fingerprint recognition unit and the stiffener; the first part contains an additional area extended from the first end of the fingerprint recognition unit; and the second part extends from the end of the additional area to the inside of the middle frame and is rigidly attached to the middle frame. 4. The electronic device according to claim 3, wherein the fingerprint reader further comprises a protective film; the protective film is attached to the first area on the first surface, the first surface faces the first part of the fingerprint recognition unit, and the first area is located near the first end of the fingerprint recognition unit. 5. An electronic device according to any one of paragraphs. 2-4, wherein each of the two ends of the stiffener is formed as a grip-shaped structure extending outward, and the mounting structure is positioned between the surface of each grip-shaped structure facing away from the first function key and the surface of the fingerprint recognition unit attached to the flexible circuit board. 6. The electronic device according to claim 3 or 4, wherein the end of the stiffener located near the first end of the fingerprint recognition unit is formed as a U-shaped structure and two edges of the U-shaped structure extend outward in a third direction; and the installation structure includes a space formed by the inner surface of the U-shaped structure. 7. An electronic device according to any one of paragraphs. 2-6, in which the fingerprint reader further comprises a protruding element, wherein the protruding element is located on the surface of the stiffening element facing the first function key and the protruding element contacts the first function key. 8. The electronic device according to claim 7, wherein the surface of the stiffener facing the first function key contains a middle region and two end regions, and the middle region is provided with a protruding element; And the fingerprint recognition device further comprises an elastic element located at each of the end regions, and when either end of the fingerprint recognition device is pressed, the elastic element located at the end comes into close contact with the middle frame. 9. The electronic device of claim 8, wherein the resilient element is foam. 10. The electronic device according to claim 7, wherein the middle frame is further provided with a second function key, wherein the second function key and the first function key are grouped in a third direction and the protruding member contacts both the first function key and the second function key. 11. An electronic device according to any one of paragraphs. 7-10, in which the surface of the stiffener facing the first function key is a stepped surface, wherein the stepped surface comprises a concave region and a convex region, and the protruding element is located on the concave region. 12. An electronic device according to any one of paragraphs. 7-11, wherein the raised member surface facing the first function key is a stepped surface, wherein the stepped surface comprises a convex region and a concave region, and the convex region contacts the first function key. 13. An electronic device according to any one of paragraphs. 7-12, in which the protruding member is made of a non-metallic material. 14. An electronic device according to any one of paragraphs. 1-13, wherein the fingerprint reader comprises a substrate, wherein a contact region of the substrate is provided with a plurality of contact areas, and the contact region comprises a side region near the end of the contact region and a middle region excluding the side region; the area of each pad in the side region is larger than the area of each pad in the middle region. 15. An electronic device according to any one of paragraphs. 1-13, wherein the fingerprint reader comprises a substrate, wherein a contact region of the substrate is provided with a plurality of contact areas, and the contact region comprises a side region near the end of the contact region and a middle region excluding the side region; the number of pads in the side area is greater than the number of pads in the middle area. 16. An electronic device according to any one of paragraphs. 1-15, in which the first function key is the power key. 17. An electronic device according to any one of paragraphs. 2-16, in which the adhesive storage groove is located on the side of the first end of the fingerprint recognition unit near the flexible circuit board. 18. An electronic device according to any one of paragraphs. 2-17, wherein the distance from the inner surface of the fingerprint recognition unit near the first end to the first flexible circuit board part is greater than the distance from the inner surface of the fingerprint recognition unit away from the first end of the first flexible circuit board part to the first flexible circuit board part; in which the inner surface is the surface of the fingerprint recognition unit closer to the side of the first function button. 19. The electronic device according to paragraphs. 2-18, in which the stiffener away from the first end of the fingerprint recognition unit is formed as a grip-shaped structure extending outward, and the mounting structure is located between the surface of the grip-shaped structure facing away from the first function button and the surface of the fingerprint recognition unit. fingers attached to a flexible printed circuit board. 20. The electronic device according to claim 6, wherein the area of the first part of the flexible circuit board located near the first end of the fingerprint recognition unit is individually connected to the fingerprint recognition unit and the U-shaped structure.

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