JP2020010556A - Power generation device for mobile terminal - Google Patents

Abstract

To provide a power generation device for a mobile terminal capable of charging a mobile terminal having a charging unit by a simple manual operation.SOLUTION: A power generation device 20 includes: a housing 22 as an example of a mounting member mounted on a mobile terminal 100 including a charging unit; a gripping member 24 as an example of an operating member provided on the housing 22 and operated through manual operation; a piezoelectric member 26 for generating power through operation of the gripping member 24; and a connection member 28 for electrically connecting the piezoelectric member 26 and the charging unit.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power generation device for a portable terminal.

  2. Description of the Related Art Conventionally, as a power generation device for a mobile terminal such as a mobile phone, a power generation device using a piezoelectric element is known (for example, see Patent Documents 1 to 4).

JP 2003-061367 A JP 2003-061368 A JP 2003-061369 A Japanese Patent Application No. 2003-529494

  By the way, the current mobile terminals such as smart phones and tablets all have a problem that their battery life is short and must be charged frequently. In some cases, this charging operation needs to be performed using a dedicated charger for each mobile terminal where there is an AC power supply.

  In addition, a lithium-ion battery is used as a power source of a current portable terminal. It is expected that a long-life power supply such as a lithium-ion battery or a fuel cell will be put to practical use in the future, but it has not been put on the market so far.

  For this reason, there is a demand in the market for a power generation device that can charge the charging section of the portable terminal with a simple operation.

  The present invention has been made in view of the above circumstances, and has as its object to provide a power generating device for a portable terminal that can be charged by a simple manual operation to a portable terminal including a charging unit.

  A power generation device for a portable terminal according to a first aspect of the present invention includes a mounting member mounted on a mobile terminal including a charging unit, an operation member provided on the mounting member, which operates by manual operation, and an operation of the operation member. And a connecting member for electrically connecting the piezoelectric member and the charging section.

  The power generating device for a portable terminal according to a second aspect of the present invention is the power generating device for a mobile terminal according to the first aspect, wherein the operating member is a gripping member that is elastically deformed by a gripping operation as the manual operation. A pressure member, which is provided at a position facing the piezoelectric member of the member and presses the piezoelectric member by the gripping member elastically deformed by the gripping operation, and a rectifying circuit that rectifies a current generated by the piezoelectric member, Further prepare.

  The power generation device for a portable terminal according to a third aspect of the present invention is the power generation device for a mobile terminal according to the second aspect, wherein the grip member has a wavy grip portion that protrudes to the side of the mobile terminal and a finger is hung on. Are formed.

  The power generation device for a portable terminal according to a fourth aspect of the present invention is the power generation device for a mobile terminal according to the first aspect, wherein the operating member is a rotating cam that rotates by a rotation operation as the manual operation, and the piezoelectric member A leaf spring whose free end is pushed up by the rotation operation of the rotary cam, and a collision that is provided on the leaf spring and collides with the piezoelectric member by a restoring force of the leaf spring pushed up by the rotation operation. The apparatus further includes a member, and a rectifier circuit that rectifies a current generated by the piezoelectric member.

  A power generation device for a portable terminal according to a fifth aspect of the present invention is the power generation device for a mobile terminal according to any one of the first to fourth aspects, wherein the mounting member includes a case for housing the mobile terminal. The connection member is built in the case.

  ADVANTAGE OF THE INVENTION According to this invention, the power generation device for portable terminals which can charge the portable terminal provided with the charging part by simple manual operation can be provided.

FIG. 1A is a front view of a mobile terminal equipped with the mobile terminal power generating device of the first embodiment. (B) It is a side view of the portable terminal of FIG. 1 (B). (C) It is a rear view of the portable terminal of FIG. 1 (A). (A) It is an expanded sectional view of the part shown by arrow A part of FIG.1 (C). FIG. 2 (B) is an enlarged sectional view showing a state where the operation member of FIG. 2 (A) is operated. (A) It is a modification of the power generation device for portable terminals of the first embodiment. FIG. 3B is an enlarged cross-sectional view showing a state where the operation member of FIG. 3A is operated. (A) It is a front view of the portable terminal to which the power generation device for portable terminals of the second embodiment is mounted. (B) It is a side view of the portable terminal of FIG. 4 (B). (C) It is a rear view of the portable terminal of FIG. 4 (A). (A) It is an expanded sectional view of the part shown by arrow B part of FIG.4 (C). (B) It is an expanded sectional view showing the state where the operation member of Drawing 5 (A) was operated. (A) It is the top view which looked at FIG. 5 (A) from the arrow C direction. (B) It is the top view which looked at FIG. 5 (A) from the arrow D direction. (A) It is a front view of a personal digital assistant showing a state where a personal digital assistant was stored in a case with which a power generator for personal digital assistants of a 3rd embodiment is provided. (B) It is a side view of the portable terminal of Drawing 7 (B). (C) It is a rear view of the portable terminal of FIG. 7 (A).

(1st Embodiment)
Hereinafter, a power generation device for a portable terminal (hereinafter, appropriately referred to as a “power generation device”) according to a first embodiment of the present invention will be described with reference to the drawings. Arrows X, Y, and Z, which are appropriately illustrated in the drawings, indicate the width direction, the height direction, and the thickness direction of the portable terminal 100 on which the power generation device 20 is mounted. Hereinafter, when the height direction X, the width direction Y, and the thickness direction Z are described, these indicate the height direction, the width direction, and the thickness direction of the portable terminal 100.

  First, the mobile terminal 100 to which the power generation device 20 of the present embodiment is mounted will be described, and then the power generation device 20 of the present embodiment will be described.

  As shown in FIG. 1, the mobile terminal 100 of the present embodiment is a mobile information terminal (in other words, a mobile terminal) including a charging unit (not shown), and uses a smartphone as an example. Note that the present invention is not limited to this configuration. A mobile phone or a tablet may be used as the mobile terminal.

  The mobile terminal 100 includes a charging unit (not shown) for charging power, and operates using the power stored in the charging unit. As the charging unit, for example, a lithium ion battery is used.

[Generator]
As shown in FIGS. 1 and 2, the power generation device 20 includes a housing 22, a gripping member 24, a piezoelectric member 26, and a connection member 28.

(Mounting member)
The housing 22 as an example of a mounting member is a member that is mounted on the back surface 100B of the mobile terminal 100 (the back surface when the operation surface is the front surface 100A), and has a box shape. A rectifier circuit 34 and wirings to be described later are built in the housing 22. The housing 22 is formed of a resin material, and is adhered to the back surface 100B of the portable terminal 100 with an adhesive member such as an adhesive tape. In the present embodiment, the housing 22 is bonded to the back surface 100B of the mobile terminal 100, but the present invention is not limited to this configuration. For example, a configuration in which a bracket or the like is attached to the portable terminal 100 and the housing 22 is attached to the bracket may be adopted, or a configuration in which the housing 22 is attached to the back of a dedicated case for the portable terminal 100 may be adopted.

(Operating members)
The gripping member 24 as an example of the operating member is a member provided on the housing 22 and operated by manual operation. Specifically, as shown in FIG. 2B, the gripping member 24 is a member that is elastically deformed by a gripping operation as a manual operation. As a material for forming the gripping member 24, for example, a cushion material can be used.

  In addition, the grip member 24 is formed with a wavy grip portion 30 that protrudes to the side of the mobile terminal 100 and on which a finger is hung. By putting a finger on the grip portion 30, the gripping operation of the gripping member 24 is facilitated. In the grip portion 30 of the present embodiment, a plurality (three) of concave portions 30A on which fingers are hooked are formed.

  Further, a pressing member 32 that presses the piezoelectric member 26 by a holding member elastically deformed by a holding operation is provided at a position of the holding member 24 facing the piezoelectric member 26. In the present embodiment, the piezoelectric member 26 is disposed at a position corresponding to the concave portion 30A of the grip portion 30.

(Piezoelectric member)
The piezoelectric member 26 is a member (a so-called piezoelectric element) that generates power by the operation of the holding member 24. Specifically, when the pressing member 32 presses the piezoelectric member 26 by the holding operation of the holding member 24, the piezoelectric member 26 generates power by the piezoelectric effect. In the present embodiment, the piezoelectric member 26 is made of a piezoelectric ceramic.

  Further, the piezoelectric member 26 is housed in a housing recess 23 formed on the side surface 22 </ b> A of the housing 22. In the present embodiment, a plurality of (three) housing recesses 23 are formed on the side surface 22A of the housing 22, and the piezoelectric members 26 are housed in the housing recesses 23, respectively. These piezoelectric members 26 are arranged so as to face the plurality of pressing members 32 when housed in the housing recess 23.

(Connecting member)
The connection member 28 is a member that electrically connects the piezoelectric member 26 and the charging unit of the mobile terminal 100. The connection member 28 includes a rectification circuit 34 for rectifying the current generated by the piezoelectric member 26, a connection terminal 36 inserted and connected to a charging terminal (not shown) of the portable terminal 100, and an electric wiring from the piezoelectric member 26 to the connection terminal 36. 38 are included.

  Next, the operation and effect of the power generation device 20 of the present embodiment will be described.

  The power generation device 20 is arranged in the gripping member 24 by the operator holding the mobile terminal 100 and gripping the gripping member 24, that is, the gripping operation is repeated, that is, the finger is repeatedly held on the concave portion 30 </ b> A of the gripping portion 30. The pressing member 32 repeatedly presses the piezoelectric member 26 (see FIG. 2B). The piezoelectric member 26 generates electric power by a piezoelectric effect by being pressurized. The current generated at this time has a pulse shape, but is smoothed by the rectifier circuit 34, supplied to the charging unit of the portable terminal 100 from the connection terminal 36 through the electric wiring 38, and the charging unit is charged.

  Here, in the power generation device 20, the charging unit of the mobile terminal 100 can be charged by a gripping operation of gripping the gripping member 24 while holding the mobile terminal 100. That is, the power generation device 20 has a special effect that the mobile terminal 100 having the charging unit can be charged by a simple manual operation. In addition, since the charging unit of the mobile terminal 100 can be charged by gripping the gripping member 24 when operating the mobile terminal 100, the number of times of charging the mobile terminal 100 can be reduced. Further, there is no need to carry a dedicated charger for the portable terminal 100.

  Further, in the power generation device 20, since the piezoelectric member 26 is pressurized via the pressurizing member 32 provided in the gripping member 24, the pressing force can be efficiently applied to the piezoelectric member 26. Thereby, the power generation efficiency of the piezoelectric member 26 is improved. Furthermore, since a plurality of piezoelectric members 26 are provided, the amount of power generation can be improved.

  Further, in the power generation device 20, since the grip portion 30 is formed on the grip member 24, the grip member 24 is easily gripped. By gripping the grip portion 30 with a finger, the gripping operation of the gripping member 24 is facilitated.

  In the first embodiment described above, the gripping member 24 is used as an example of the operating member, but the present invention is not limited to this configuration. For example, a gripping member 42 may be used as an example of the operation member, as in the power generation device 40 shown in FIG. In the power generator 40, a concave spring housing portion 44 is provided on the side surface 22 </ b> A of the housing 22, and a coil spring 46 is housed in the spring housing portion 44. The housing 22 includes a piezoelectric member 26 and houses a rectifier circuit 34. The gripping member 42 includes the grip portion 30 and the pressing member 32, and further includes a rod-shaped portion 47 that is housed in a spring housing portion 44 that houses a coil spring 46. When the gripping member 42 is pressed toward the housing 22 by the gripping operation, it slides and the pressing member 32 presses the piezoelectric member 26 (see FIG. 3B). A groove 22C extending along the width direction Y is formed on the facing surface 22B in the height direction X of the housing 22, and a stopper 48 provided on the gripping member 42 is hooked on the groove 22C. The stopper portion 48 can limit the movement of the gripping member 42 by abutting on both ends in the extending direction of the groove portion 22C (here, the same direction as the width direction Y). In the power generation device 40, the grip member 42 is gripped, and the grip member 42 is pressed toward the housing 22 so that the grip member 42 slides and the piezoelectric member 26 is pressed by the pressing member 32. Here, the gripping member 42 moved to the housing 22 side moves to the original position by the repulsive force of the coil spring 46, so that the gripping member 42 can be gripped at a good tempo.

  In the first embodiment described above, the shape of the grip portion 30 of the gripping member 24 is such that the operator's finger (for example, little finger, ring finger, middle finger) can be hung, but the present invention has this configuration. It is not limited to. For example, the shape of the grip portion 30 of the gripping member 24 may be a shape that can be pressed by a flat portion near the base of the thumb. By setting the shape of the grip portion 30 to such a shape, power can be generated even by a gripping operation using the flat portion of the thumb. Further, the gripping member 24 may be provided on one side in the width direction Y of the housing of the power generator, and a gripping member having a shape corresponding to the flat part of the thumb may be provided on the other side in the width direction Y. With such a configuration, the fingers (three fingers) of the hand holding the portable terminal 100 and the thumb flat portion together form the gripping member 24 and the gripping member having a shape corresponding to the thumb flat portion. Therefore, the power generation efficiency and the power generation amount can be further improved.

(2nd Embodiment)
Next, the power generator 50 according to the present embodiment will be described with reference to FIGS. In the present embodiment, the power generation device 50 is mounted on the portable terminal 100.

[Generator]
As shown in FIGS. 4 and 5, the power generation device 50 includes a housing 52, a rotating cam 54, a piezoelectric member 26, and a connection member 28.

(Mounting member)
The housing 52 as an example of a mounting member is a member mounted on the back surface 100B of the portable terminal 100, and has a box shape. The rectifier circuit 34 and wirings are built in the housing 52. The housing 52 is formed of a resin material, and is adhered to the back surface 100B of the portable terminal 100 with an adhesive member such as an adhesive tape. Note that the same method as that for mounting the housing 22 of the first embodiment can be used for mounting the housing 52 to the portable terminal 100.

(Operating members)
The rotating cam 54 as an example of the operating member is a member provided on the housing 52 and operated by manual operation. Specifically, as shown in FIGS. 4 and 5, the rotating cam 54 is a member that is rotated by a rotating operation as a manual operation. A plurality of cam portions 54A projecting to the outer periphery are formed on the rotating cam 54 at intervals in the circumferential direction. The rotating cam 54 is rotatably attached to the housing 52 with the thickness direction Z being the rotation axis direction.

  A support portion 56 is provided in the housing 52, and a leaf spring 58 and a support plate 60 are arranged on the support portion 56 so as to face each other in the height direction X.

  As shown in FIG. 5B, the free end 58A of the leaf spring 58 is pushed up by the rotating operation of the rotating cam 54. Note that the base end of the leaf spring 58 is supported by the support portion 56.

  The support plate 60 is disposed so as to face the leaf spring 58, and a plurality of (six in the present embodiment) piezoelectric members 26 are provided on the surface on the leaf spring 58 side. The base end of the support plate 60 is supported by the support portion 56.

  A collision member 62 that collides with the piezoelectric member 26 is provided on the surface of the leaf spring 58 on the support plate 60 side. The collision members 62 of the present embodiment are provided at positions corresponding to the piezoelectric members 26, respectively. Here, the collision member 62 collides with the piezoelectric member 26 by the restoring force of the leaf spring pushed up by the rotation operation of the rotary cam 54. The current generated by the piezoelectric member 26 is supplied to the charging unit of the portable terminal 100 through the rectifier circuit 34, the electric wiring 38, and the connection terminal 36.

  Next, the operation and effect of the power generation device 50 of the present embodiment will be described.

  In the power generating device 50, the free end 58A of the leaf spring 58 is lifted by the cam portion 54A of the rotating cam 54 when the operator holding the portable terminal 100 rotates (rotates) the rotating cam 54 using a finger. (See FIG. 5B). When the cam portion 54A separates from the free end 58A, the leaf spring 58 returns to the original state by the restoring force. At this time, the collision member 62 provided on the leaf spring 58 collides with the piezoelectric member 26 provided on the support plate 60, and the piezoelectric member 26 is pressed. The piezoelectric member 26 generates electric power by a piezoelectric effect by being pressurized. The current generated at this time has a pulse shape, but is smoothed by the rectifier circuit 34, supplied to the charging unit of the portable terminal 100 from the connection terminal 36 through the electric wiring 38, and the charging unit is charged.

  Here, in the power generation device 50, the charging unit of the mobile terminal 100 can be charged by rotating the rotary cam 54 while holding the mobile terminal 100. That is, the power generation device 20 has a special effect that the mobile terminal 100 including the charging unit can be charged by a simple rotation operation. In addition, the charging unit of the mobile terminal 100 can be charged by rotating the rotary cam 54 when the mobile terminal 100 is operated, so that the number of times of charging the mobile terminal 100 can be reduced. Further, there is no need to carry a dedicated charger for the portable terminal 100.

  Further, in the power generation device 50, since the plurality of piezoelectric members 26 are provided, the amount of power generation can be improved.

(Third embodiment)
Next, a power generator 70 according to the present embodiment will be described with reference to FIG. In the present embodiment, the power generation device 70 is mounted on the mobile terminal 100.

  The power generation device 70 of the present embodiment is different from the power generation device 70 of the first embodiment in a configuration in which a housing 72 as an example of a mounting member includes a case 74 that accommodates the mobile terminal 100. Other configurations of the power generation device 70 are the same as those of the power generation device 20 of the first embodiment, and a description thereof will be omitted. In the drawings, the same components as those in the first embodiment are denoted by the same reference numerals.

  The housing 72 is formed integrally with the case 74. The housing 72 has the same configuration as the housing 22 of the first embodiment. The case 74 is a case that accommodates the mobile terminal 100 and has the connection member 28 built therein. Specifically, the electric wiring 38 is built in the inside of the rear wall 74A of the case 74, and the electric wiring 38 is connected to the connection terminal 36 protruding from the frame wall 74B of the case 74 to the inside of the case.

  Next, the operation and effect of the power generation device 70 of the present embodiment will be described. The description of the same operation and effect as the operation and effect obtained in the first embodiment will be appropriately omitted.

  In the power generator 70 of the present embodiment, since the case 74 of the mobile terminal 100 is included in the housing 72, mounting work of the power generator 70 is easier than, for example, a configuration in which a power generator is separately mounted in a case for the mobile terminal 100. It is. Further, since the electric wiring 38 is passed through the case 74, the appearance and the usability are improved, for example, as compared with the case where the electric wiring 38 is provided outside.

  Note that the configuration of the third embodiment may be applied to the second embodiment. That is, the housing 52 of the power generator 50 of the second embodiment may be configured to include a case for housing the mobile terminal 100.

  Further, the housing 22 of the power generation device 20 of the first embodiment and the housing 52 of the power generation device 50 of the second embodiment may be configured to include the same case that houses the mobile terminal 100. In other words, the power generators 20 and 50 may be provided in one case.

Further, in the first embodiment, the piezoelectric member 26 is made of piezoelectric ceramic, but the present invention is not limited to this structure. The piezoelectric member 26 may be made of a piezoelectric film. As the piezoelectric film, for example, a film in which polyvinylidene fluoride is formed in a film shape may be used. When a piezoelectric film is used as the piezoelectric member 26, the piezoelectric film may be attached to the side surface 22 </ b> A without forming the housing recess 23 on the side surface 22 </ b> A of the housing 22. Thereby, the shape of the housing 22 can be simplified. Further, a configuration may be adopted in which a single piezoelectric film is attached without attaching a plurality of piezoelectric films. In this case, the operation of attaching the piezoelectric film is simplified. Furthermore, by constituting the piezoelectric member with a piezoelectric film in which polyvinylidene fluoride is formed into a film, a high voltage output ten times or more can be obtained as compared with the case where the piezoelectric member is composed of a piezoelectric ceramic. Thereby, the power generation efficiency of the power generation device is further improved.
In addition, the configuration in which the piezoelectric member according to the present invention is formed of a piezoelectric film may be applied to the power generation device of the second embodiment and the power generation device of the third embodiment.

  As described above, one embodiment of the present invention has been described, but the present invention is not limited to the above, and various modifications other than the above can be made without departing from the gist of the present invention. Of course.

20 power generator (power generator for mobile terminal)
22 Housing (mounting member)
24 gripping members (moving members)
26 Piezoelectric member 28 Connecting member 30 Grip part 32 Pressurizing member 34 Rectifier circuit 36 Connection terminal 38 Electric wiring 40 Power generator 42 Holding member (operating member)
Reference Signs List 50 power generator 52 housing (mounting member)
54 Rotating cam (moving member)
58 leaf spring 58A free end 62 collision member 70 power generation device 72 housing (mounting member)
74 case 100 mobile terminal

Claims (5)

A mounting member mounted on a mobile terminal having a charging unit,
An operating member provided on the mounting member and operated by manual operation;
A piezoelectric member that generates power by the operation of the operating member,
A connection member that electrically connects the piezoelectric member and the charging unit;
A power generation device for a mobile terminal, comprising: The operating member is a gripping member that is elastically deformed by a gripping operation as the manual operation,
A pressing member that is provided at a position of the gripping member facing the piezoelectric member and that presses the piezoelectric member by the gripping member that is elastically deformed by the gripping operation;
The power generation device for a portable terminal according to claim 1, further comprising: a rectification circuit that rectifies a current generated by the piezoelectric member.   The power generation device for a portable terminal according to claim 2, wherein the grip member is formed with a wavy grip portion that protrudes to the side of the portable terminal and hangs a finger. The operating member is a rotating cam that rotates by a rotating operation as the manual operation,
A leaf spring that is disposed to face the piezoelectric member and whose free end is pushed up by the rotating operation of the rotating cam;
A collision member provided on the plate spring and colliding with the piezoelectric member by a restoring force of the plate spring pushed up by the rotation operation,
The power generation device for a portable terminal according to claim 1, further comprising: a rectification circuit that rectifies a current generated by the piezoelectric member. The mounting member includes a case that houses the mobile terminal,
The power generation device for a portable terminal according to any one of claims 1 to 4, wherein the connection member is built in the case.