JP6340901B2 - Portable electronic device and fingerprint sensor unit - Google Patents

Description

The technology of the present disclosure relates to a portable electronic device such as a mobile phone including a fingerprint sensor unit and a fingerprint sensor unit.

  Conventionally, a fingerprint sensor unit is mounted on an electronic device such as a mobile phone. This fingerprint sensor unit includes a fingerprint sensor together with a water stop member. The water stop member has flexibility such as silicon rubber, and this flexibility affects the positioning accuracy of the fingerprint sensor.

In a push button switch in an electronic device, it is known that the push button portion is guided by a frame to prevent lateral displacement (for example, Patent Document 1).

JP-A-10-261336

  By the way, when the fingerprint sensor unit provided with the water stop member is assembled to the case of the mobile phone, there arises a disadvantage that the position of the fingerprint sensor is shifted by the water stop member and the case cannot be closed due to the position shift of the fingerprint sensor.

  Conventionally, for example, as shown in FIG. 13, a fingerprint sensor unit 100 is mounted on a mobile phone. The fingerprint sensor unit 100 includes a member 104-1 to which the fingerprint sensor 102 is fixed and a member 104-2 attached to the case 106 side. The member 104-1 and the member 104-2 are separate members that are separated by providing a gap 108, and these members are connected by a flexible member 110 having water-stopping property such as silicon rubber. Even when connected by such a flexible member 110, the member 104-1 and the member 104-2 are in a separated state with a gap 108 therebetween. For this reason, when the fingerprint sensor unit 100 is assembled to the attachment window 112 of the case 106, the position of the fingerprint sensor 102 fluctuates, causing a problem that the fingerprint sensor 102 is displaced from the normal attachment position.

Therefore, in view of the above-described problems, an object of the technology of the present disclosure is to prevent the positional displacement of the fingerprint sensor when the fingerprint sensor unit is assembled to the case.

In order to achieve the above object, according to one aspect of the technology of the present disclosure, a portable electronic device having a case and a fingerprint sensor unit, the fingerprint sensor unit including a metal member and a water stop member. The metal member has a central portion to which the fingerprint sensor is fixed, and a pair of standing wall portions formed between the central portion and provided with notches at the end portions, an outer peripheral portion surrounding the central portion, and a pair of And a connecting portion that is formed between the notches of the standing wall portion and connects the central portion to the outer peripheral portion so as to be able to double-act. The water stop member is formed in a circular shape including the standing wall portion, and seals a gap between the central portion and the outer peripheral portion while exposing the connection portion, and the standing wall portion included in the outer peripheral portion and the Stop water between the case.

According to the technology of the present disclosure, when the fingerprint sensor unit is assembled to the case, the connection unit prevents the movement of the center part in the direction perpendicular to the direction of double movement, thereby preventing the position deviation of the fingerprint sensor. it can.

It is a perspective view which shows an example of the mobile telephone which concerns on one Embodiment. It is a disassembled perspective view which shows a mobile telephone. It is a disassembled perspective view which shows a fingerprint sensor unit. It is a figure which shows the metal member before and behind installation of a water stop member. It is a perspective view which shows a metal member provided with a water stop member from the back side. FIG. 5 is a cut end view showing an AA line cut end surface, a BB line cut end surface, and a CC line cut end surface of B of FIG. 4. It is sectional drawing which shows a part of mobile phone with which the fingerprint sensor unit was assembled | attached. It is sectional drawing which shows a part of mobile phone with which the fingerprint sensor unit was assembled | attached. It is a figure for demonstrating the position shift prevention function of the fingerprint sensor of a fingerprint sensor unit. It is a figure for demonstrating the position shift prevention function of the fingerprint sensor of a fingerprint sensor unit. It is sectional drawing which shows a deformation | transformation of the metal member and water stop member by pressing load. It is sectional drawing which shows the deformation | transformation by the pressing load of the water stop member which concerns on a modification. It is sectional drawing which shows the mobile telephone with which the conventional fingerprint sensor unit was assembled | attached.

  FIG. 1 shows an example of a mobile phone according to an embodiment.

  The mobile phone 2 is provided with a front case 4 and a rear case 6. A front cover 8 is provided on the front surface of the front case 4. The front case 4, the rear case 6 and the front cover 8 are, for example, molded bodies formed of a synthetic resin material. A sensor window 10 is formed on the front cover 8. Therefore, in the cellular phone 2, the finger surface is pressed against the sensor window 10 and slid to detect the fingerprint from the finger.

  FIG. 2 shows the cellular phone 2 disassembled into a front case 4, a rear case 6, a front cover 8 and a fingerprint sensor unit 12.

  A circuit board 14 is installed on the rear case 6, and a fingerprint sensor unit mounting portion 16 is set on the circuit board 14. The fingerprint sensor unit 12 is assembled to the fingerprint sensor unit mounting portion 16.

  The front case 4 is combined with the rear case 6, and the fingerprint sensor unit 12 is fixed to the sensor mounting portion 18 of the front case 4. Thus, the front cover 8 is united with the front case 4 of the mobile phone 2 to which the fingerprint sensor unit 12 is assembled.

  FIG. 3 shows the fingerprint sensor unit 12 in an exploded manner. The fingerprint sensor unit 12 is provided with a fingerprint sensor 20. The fingerprint sensor 20 is provided with a sensor unit 24 on the front side of the support member 22. The support member 22 is, for example, a metal plate, and has a polygonal shape obtained by cutting off corners of the metal plate. A flexible cable 26 is connected to the back side of the sensor unit 24 and is pulled out from the back side of the support member 22.

  The fingerprint sensor 20 is fixed to the central portion 30 of the metal member 28 with an adhesive member 32 such as a double-sided adhesive sheet. The metal member 28 is provided with a water stop member 34 surrounding the fingerprint sensor 20 of the fingerprint sensor unit 12. The water stop member 34 is formed of a water stop material such as silicon rubber, and includes a standing wall protruding in the height direction of the fingerprint sensor unit 12.

  A through hole 36 is formed in the central portion 30 of the metal member 28, and the flexible cable 26 of the fingerprint sensor 20 is drawn out from the through hole 36 to the back side of the metal member 28.

  FIG. 4A shows the metal member 28 before the water stop member 34 is installed. The metal member 28 is formed with an outer peripheral portion 38 surrounding the center portion 30 around the center portion 30 described above. A gap 40 is formed between the outer peripheral portion 38 and the central portion 30. A pair of connecting portions 42 are formed between the longitudinal edge of the central portion 30 and the outer peripheral portion 38. Each connecting portion 42 connects the central portion 30 to the outer peripheral portion 38 so as to be able to double-act. The central portion 30, the outer peripheral portion 38, and the connecting portion 42 are formed as a single metal member 28 by, for example, integral molding of a metal plate. Each connection part 42 is formed narrower than the width of the central part 30. According to such a configuration, the central portion 30 is supported by the outer peripheral portion 38 so as to be able to double-act due to the elasticity of each connecting portion 42.

  The outer peripheral portion 38 is formed with a pair of standing wall portions 44 at the edge on the gap 40 side. A notch 46 is provided at the end of each standing wall 44 on the side where the connecting portion 42 is formed. Each standing wall portion 44 is erected in a direction orthogonal to the surface portion of the outer peripheral portion 38, and thus functions as a reinforcing portion for the outer peripheral portion 38. That is, the rigidity of the outer peripheral portion 38 is enhanced by the standing wall portion 44.

  FIG. 4B shows the metal member 28 after the water stop member 34 is installed. Around the standing wall portion 44, a circumferential water stop member 34 including the standing wall portion 44 is formed on the outer peripheral portion 38. The water stop member 34 is installed across the gap 40 on the back side of the central portion 30 and the outer peripheral portion 38, and the water stop member 34 is embedded in the gap 40. Each notch 46 between the standing wall portions 44 is included in the water stop member 34. Further, the surface portion of the central portion 30, which is the installation surface of the fingerprint sensor unit 12, and the connection portion 42 continuous to the central portion 30 are exposed from the water stop member 34.

  FIG. 5 shows the metal member 28 after installation of the water blocking member 34 from the back side.

  The water stop member 34 on the back side of the metal member 28 has a recess 48 that is recessed from the outer peripheral surface of the outer peripheral portion 38 toward the central portion 30 side. A pair of ribs 50 are formed on the back side of the connecting portion 42 as an example of a convex portion having a surface portion that matches the surface portion of the outer peripheral portion 38. In this embodiment, each rib 50 is formed to be wider than the connection portion 42 at a position where it overlaps the connection portion 42 of the metal member 28. In this embodiment, each rib 50 is formed at a position overlapping the connection portion 42 of the metal member 28.

  And the water stop member 34 arrange | positioned at the back side of the center part 30 is formed with the several through-hole part 51 which exposes the back surface of the center part 30. As shown in FIG.

  A of FIG. 6 has shown the AA line | wire cut end surface of B of FIG. B of FIG. 6 has shown the BB line | wire end surface of B of FIG. C of FIG. 6 has shown the CC cut end surface of B of FIG.

  As shown in FIG. 6A, each connection portion 42 is formed in a bent shape, and the central portion 30 protrudes from the outer peripheral portion 38 in the direction opposite to the pressing direction of the fingerprint sensor 20.

  Each standing wall portion 44 formed on the outer peripheral portion 38 has a height protruding from the height position of the central portion 30 as shown in FIGS. Each standing wall portion 44 is covered with the water blocking member 34 to form a standing wall portion 52. That is, the standing wall portion 52 is reinforced by the standing wall portion 44 of the outer peripheral portion 38. On the other hand, a water stop member 34 is formed on the back side of the central portion 30 and the outer peripheral portion 38, and the gap 40 and the connection portion 42 are exposed from the water stop member 34. Further, the inner wall surface of the through hole 36 is covered with a water stop member 34.

  The standing wall portion 52 of the water blocking member 34 has a protruding curved surface portion 54 that protrudes in a direction parallel to the central portion 30 on the outer peripheral surface portion. The protruding curved surface portion 54 is in close contact with the inner wall surface of the sensor mounting portion 18 of the front case 4 and performs a water stop function with the front case 4.

  Thus, the water stop member 34 and the connection part 42 bridge the center part 30 and the outer peripheral part 38, and the central part 30 is connected to the outer peripheral part 38 by the elasticity of the water stop member 34 and each connection part 42. It is supported so that it can be double-acted.

  7, 8, and 9 show an assembling process of the fingerprint sensor unit 12 in the mobile phone 2.

  As shown in FIG. 7, the rear case 6 is provided with a dome switch 56 for detecting a pressure on the fingerprint sensor 20 on the fingerprint sensor unit mounting portion 16 set on the circuit board 14. A fingerprint sensor unit mounting frame 58 is attached to the circuit board 14 by an adhesive member 60 so as to surround the dome switch 56.

  Before the fingerprint sensor unit 12 is assembled, the sensor unit 24 is fixed to the support member 22. In this case, an operation unit 62 for pressing the dome switch 56 is provided on the back side of the support member 22.

  As shown in FIG. 8, the front case 4 is positioned on the rear case 6 on which the fingerprint sensor unit 12 is installed.

  As shown in FIG. 9, the water stop member 34 of the fingerprint sensor unit 12 is compressed and inserted into the sensor mounting portion 18 of the front case 4. The outer peripheral portion 38 is sandwiched and fixed between the front case 4 and the rear case 6.

  A front cover 8 is installed on the front case 4 and covers the fingerprint sensor unit 12.

  With such a configuration, by installing the rib 50 on the upper surface of the fingerprint sensor unit mounting frame 58, the fingerprint sensor unit 12 is supported on the upper surface of the fingerprint sensor unit mounting frame 58 through the rib 50.

  The water blocking member 34 seals the gap 40 between the central portion 30 and the outer peripheral portion 38, and is in close contact with the sensor mounting portion 18 of the front case 4 in a compressed state, and the standing wall portion 44 and the front case 4 included in the outer peripheral portion 38. Water is stopped between.

  FIG. 10 shows an assembled state of the fingerprint sensor unit 12 installed in the mobile phone 2.

  The central portion 30 and the outer peripheral portion 38 are connected by a pair of connecting portions 42 in addition to the elastic holding of the water blocking member 34 that seals the gap 40, and are supported in the XY axial directions. For this reason, even if stress is applied to the four broken arrows x1, x2, y1, and y2 shown in FIG. 10, the displacement of the attachment position of the fingerprint sensor 20 can be suppressed, and the displacement can be prevented. That is, displacement displacement in a direction orthogonal to the advancing / retreating direction (Z-axis direction) of the fingerprint sensor 20 is prevented.

  FIG. 11A shows a part of the fingerprint sensor unit 12 cut at the connection portion 42 by cutting, and shows a state before the deformation of the central portion 30 of the metal member 28. The central portion 30 of the metal member 28 is maintained horizontally by the connection portion 42 as well as the water stop member 34.

  B of FIG. 11 shows a lowered state of the central portion 30 of the metal member 28 due to a pressing load on the fingerprint sensor 20.

  When a finger is placed on the sensor window 10 and the fingerprint sensor 20 is pressed, the central portion 30 that receives the pressing load from the fingerprint sensor 20 descends as shown in FIG. The two-dot chain line shows the state before the descent.

  Due to the lowering of the central portion 30, the water stop member 34 is deformed, and at the same time, the connection portion 42 of the metal member 28 is deformed by receiving the pressing load, but this deformation prevents the ripple deformation to the outer peripheral portion 38. Thereby, deformation | transformation, such as a fall of the standing wall part 52 of the water stop member 34, is prevented. Therefore, the protruding curved surface portion 54 can prevent the water stop function from being deteriorated without impairing the close contact state with the sensor mounting portion 18, and can maintain a stable water stop function.

  In this embodiment, the rib 50 supports the deformation of the connection portion 42 and contributes to prevention of the falling wall portion 52 of the water stop member 34 from falling down.

<Operation and Effect of One Embodiment>

  (1) As described above, when the fingerprint sensor unit 12 is assembled, the positional displacement of the fingerprint sensor 20 can be prevented, and the inconvenience that the front case 4 is prevented from being attached due to the positional displacement can be avoided.

  (2) In the metal member 28 in which the central portion 30 and the outer peripheral portion 38 are connected by the connecting portion 42, the connecting portion 42 receives the pressing load of the fingerprint sensor 20, and excessive pressing can be prevented. As a result, the inconvenience that the water stop function is impaired due to the center portion 30 being pushed in and the water stop member 34 such as silicon rubber being deformed can be avoided.

  (3) Excessive depression of the central portion 30 is received by the rib 50 in the water stop member 34, and the falling wall portion 52 of the water stop member 34 is prevented from falling down and the water stop function can be prevented from being impaired.

  (4) The positional deviation of the fingerprint sensor 20 due to the assembling variation of the fingerprint sensor unit 12 can be improved, the adhesion between the water stop member 34 and the front case 4 can be enhanced, and the water stop function can be enhanced.

<Modification>

  In the above embodiment, the pair of ribs 50 are provided on the back side of the fingerprint sensor unit 12, but as shown in FIG. 50 may be omitted. In this case, as shown in FIG. 12B, even when the central portion 30 is lowered and deformed, the load deformation can be prevented by the connecting portion 42, and the spilling deformation such as the falling of the standing wall portion 52 can be prevented. As a result, since the contact state between the protruding curved surface portion 54 and the inner wall surface of the sensor mounting portion 18 can be maintained, a stable water stop function can be maintained.

As described above, the most preferable embodiment of the technology of the present disclosure has been described. The present invention is not limited to the above description. Various modifications and changes can be made by those skilled in the art based on the gist of the invention described in the claims or disclosed in the embodiments for carrying out the invention. It goes without saying that such modifications and changes are included in the scope of the technology of the present disclosure.

2 cellular phone 4 front case 6 rear case 8 front cover 10 sensor window 12 fingerprint sensor unit 14 circuit board 16 fingerprint sensor unit mounting portion 18 sensor mounting portion 20 fingerprint sensor 22 support member 24 sensor portion 26 flexible cable 28 metal member 30 center Part 32 Adhesive member 34 Water stop member 36 Through hole 38 Outer peripheral part 40 Gap 42 Connection part 44 Standing wall part 46 Notch 48 Recessed part 50 Rib 51 Through hole part 52 Standing wall part 54 Projected curved surface part 56 Dome switch 58 Fingerprint sensor unit mounting frame 60 Adhesive member 62 Operation part

Claims (2)

A portable electronic device having a case and a fingerprint sensor unit,
The fingerprint sensor unit is
A center part to which the fingerprint sensor is fixed and a pair of standing wall parts formed between the center part and provided with a notch at the end part, an outer peripheral part surrounding the center part, and a pair of the standing walls A metal member that is formed between the notches of the part and has a connection part that connects the center part to the outer peripheral part so as to be capable of double-acting;
It encloses the standing wall portion and is formed in a circular shape, sealing the gap between the central portion and the outer peripheral portion while exposing the connection portion, and between the standing wall portion and the case included in the outer peripheral portion. A water stop member for stopping water,
A portable electronic device comprising: A fingerprint sensor unit equipped with a fingerprint sensor and installed in a case,
A central portion said fingerprint sensor is fixed, a pair of vertical wall portions which are formed the notches are provided at an end portion between said central portion, and the outer peripheral portion surrounding the central portion, a pair of the A metal member formed between the notches of the standing wall portion and having a connection portion that connects the central portion to the outer peripheral portion so as to allow double movement;
It encloses the standing wall portion and is formed in a circular shape, sealing the gap between the central portion and the outer peripheral portion while exposing the connection portion, and between the standing wall portion and the case included in the outer peripheral portion. A water stop member for stopping water,
A fingerprint sensor unit comprising:

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