CN204887100U - Mobile phone case that can generate electricity automatically - Google Patents

Abstract

The utility model relates to a cell phone case, especially a can automatic cell phone case who generates electricity belong to charging device's technical field. According to the utility model provides a technical scheme, can automatic cell phone case who generates electricity is including the cell -phone casing, be equipped with the electric energy energy memory who is used for storing the electric energy on the cell -phone casing, micro motor's output is connected on electric energy energy memory's charge end and the cell -phone casing, still be equipped with to be used for driving micro motor and to rotate the motor rotation drive arrangement who generates electricity the back on the cell -phone casing, the motor rotates drive arrangement and micro motor accordant connection to can be to the energy storage of charging of electric energy energy memory after drive micro motor rotates. The utility model discloses simple structure is compact, carries convenient to use, can charge for the cell -phone, and is energy -concerving and environment -protective, safe and reliable.

Description

Mobile phone case that can generate electricity automatically

technical field

The utility model relates to a mobile phone casing, in particular to a mobile phone casing capable of generating electricity automatically, and belongs to the technical field of charging devices.

Background technique

With the continuous improvement of living standards, people pay more attention to their health. More and more people are exercising and maintaining physical and mental health by running in the morning, walking after meals, and climbing mountains on weekends. At present, when people go out for a walk, they will carry more electrical equipment, such as mobile phones, radios, etc., and the storage power of electrical equipment such as mobile phones is very limited. Many inconveniences affect the utilization rate of corresponding electrical equipment.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art and provide a mobile phone case capable of generating electricity automatically. The utility model has a simple and compact structure, is easy to carry and use, can charge the mobile phone, is energy-saving, environmentally friendly, safe and reliable.

According to the technical solution provided by the utility model, the mobile phone casing capable of automatically generating electricity includes a mobile phone casing; an electric energy storage device for storing electric energy is provided on the mobile phone casing, and the charging terminal of the electric energy storage device It is connected with the output end of the micro motor on the mobile phone shell, and a motor rotation driving device for driving the micro motor to generate electricity after the rotation of the mobile phone is also provided on the mobile phone housing. The motor rotation driving device is matched with the micro motor to drive the micro motor to rotate Afterwards, the electric energy storage device can be charged and stored.

The micromotor is electrically connected to the electric energy storage device through a rectification filter circuit board, the rectification filter circuit board is fixed on the mobile phone casing, and the rectification filter circuit board, the micromotor and the electric energy storage device are all located on the same side of the mobile phone casing, The electric energy storage device includes an energy storage capacitor or a rechargeable battery.

The motor rotation driving device includes a pendulum capable of swinging on the mobile phone casing, the pendulum is installed on the mobile phone casing through a pendulum mounting shaft, and a pendulum driving gear is arranged between the pendulum and the mobile phone casing. The pendulum drive gear is fixedly connected with the pendulum, and both the pendulum and the pendulum drive gear can swing on the mobile phone casing around the pendulum installation shaft; the pendulum drive gear is connected to the micro motor through the gear transmission connection mechanism on the mobile phone The motor gear on the output shaft is matingly connected.

The gear transmission connection mechanism includes a swing transmission gear set for transmitting and outputting the swing force generated when the pendulum drive gear swings, and the swing transmission gear set is meshed with the spring drive gear mechanism through an intermediate connection transmission gear set;

The spring transmission gear mechanism includes a spring and a spring tightening gear for tightening the spring, the spring tightening gear is installed on the mobile phone case through the spring transmission support shaft, and the spring is tightened The gear is provided with a barrel for accommodating the spring, the center of the spring is connected to the axis of the winding gear, and the outside of the spring is connected to the inner wall of the barrel; the outer wall of the barrel is A barrel gear is provided, and the barrel gear can be meshed with the first connection transmission gear on the mobile phone casing, the first connection transmission gear can rotate on the mobile phone casing, and the first connection transmission gear is also connected to the motor The gears mesh.

The intermediate connection transmission gear set includes a second connection transmission gear, a third connection transmission gear, a fourth connection transmission gear and a fifth connection transmission gear; wherein, the second connection transmission gear is coaxially distributed with the third connection transmission gear and can synchronous rotation, the fourth connecting transmission gear is coaxially distributed with the fifth connecting transmission gear and can rotate synchronously; the third connecting transmission gear meshes with the mainspring winding gear, the second connecting transmission gear meshes with the fifth connecting transmission gear, The fourth connection transmission gear is connected and matched with the swing transmission gear set.

The swing transmission gear set includes a forward gear set and a reverse gear set; the forward gear set includes a forward gear and a forward and downward gear coaxially distributed with the forward gear, and the reverse gear set includes a reverse upper gear and The reverse lower gear coaxially distributed with the reverse upper gear, the pendulum drive gear meshes with the forward upper gear and the reverse upper gear at the same time, the forward lower gear meshes with the reverse lower gear, and the reverse lower gear meshes with the first reverse gear The four connecting transmission gears are meshed.

The forward gear is located above the forward gear, and a forward gear ratchet mechanism is provided between the forward gear and the forward gear. The forward gear ratchet mechanism includes a forward rotating pawl and a Rotate the forward ratchet matched by the pawl, and the forward gear can drive the forward gear to rotate through the forward gear ratchet mechanism when the forward gear rotates clockwise.

The reverse upper gear is located above the reverse lower gear, and a reverse gear ratchet mechanism is provided between the reverse upper gear and the reverse lower gear. The reverse gear ratchet mechanism includes a reverse rotation pawl and a Turn the reverse ratchet matched by the ratchet, and the reverse upper gear can drive the reverse lower gear to rotate through the reverse gear ratchet mechanism when it rotates counterclockwise.

The utility model has the advantages that an electric energy storage device is installed on the mobile phone casing, and the electric energy storage device is charged by the output of the micro motor, the pendulum on the mobile phone casing can swing, and after the pendulum swings, it passes through the swing transmission gear group, the middle The connecting transmission gear set and the clockwork transmission gear mechanism are transmitted to the first connecting transmission gear, and the first connecting transmission gear meshes with the motor gear, so that the high-speed rotation of the micro motor can be driven in real time, so as to achieve the charging of the electric energy storage device by the micro motor, and the electric energy The energy storage device can charge the mobile phone after being charged, has a simple and compact structure, is convenient to carry and use, is energy-saving, environment-friendly, safe and reliable.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of cooperation between the motor rotation drive device of the present invention and the micro motor.

Fig. 3 is a schematic diagram of cooperation between the swing transmission gear set, the intermediate connection transmission gear set and the mainspring drive gear mechanism of the present invention.

Fig. 4 is an enlarged view of the spring transmission gear mechanism of the utility model.

Fig. 5 is a schematic diagram of the reverse gear set of the present invention.

Fig. 6 is a schematic diagram of the forward gear set of the present invention.

Explanation of reference signs: 1-mobile phone shell, 2-miniature motor, 3-motor gear, 4-first connecting transmission gear, 5-spring box, 6-spring, 7-central support shaft, 8-spring Tightening gear, 9-second connection transmission gear, 10-filter rectification circuit board, 11-third connection transmission gear, 12-fourth connection transmission gear, 13-reverse lower gear, 14-fifth connection transmission gear, 15-reverse upper gear, 16-pendulum driving gear, 17-pendulum, 18-pendulum base, 19-forward upward gear, 20-forward downward gear, 21-electric energy storage device, 22-first gear Installation shaft, 23-second gear installation shaft, 24-pendulum installation shaft, 25-spring box gear, 26-reverse rotation pawl and 27-forward rotation pawl and 28-third gear installation shaft.

Detailed ways

Below in conjunction with specific accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1: in order to charge the mobile phone conveniently, the utility model includes a mobile phone casing 1; an electric energy storage device 21 for storing electric energy is arranged on the mobile phone casing 1, and the electric energy storage device The charging end of 21 is connected with the output end of the micro motor 2 on the mobile phone casing 1, and the motor rotation driving device for driving the micro motor 2 to generate electricity after the rotation of the mobile phone casing 1 is also provided, and the motor rotation driving device and the micro motor 2 are matched and connected so as to drive the micro motor 2 to rotate to charge and store the electric energy storage device 21.

Specifically, the micromotor 2 is a generator, the micromotor 2 and the electric energy storage device 21 can be located on the same side surface of the mobile phone casing 1, and the motor rotation drive device can also be located on the same side surface of the mobile phone casing 1 as the micromotor 2, The motor rotation driving device can drive the micro motor 2 to rotate, and the electric energy outputted by the micro motor 2 after rotation is stored in the electric energy storage device 21 .

Further, the micro motor 2 is electrically connected to the electric energy storage device 21 through the rectification and filtering circuit board 10, the rectification and filtering circuit board 10 is fixed on the mobile phone casing 1, and the rectification and filtering circuit board 10 is connected to the micro motor 2 and the electric energy storage device. The devices 21 are all located on the same side of the mobile phone casing 21, and the electric energy storage device 21 includes an energy storage capacitor or a rechargeable battery.

In the embodiment of the utility model, the output end of the micro motor 2 is connected to the rectification and filtering circuit board 10 through the corresponding connection line, and the electric energy output by the micro motor 2 is rectified and filtered by the rectification and filtering circuit board 10 to realize the energy storage device 21. For charging, the rectifying and filtering circuit board 10 is fixed on the mobile phone casing 1, and the rectifying and filtering circuit board 10 can adopt an existing common structural form, which is well known to those skilled in the art. By adopting the electric energy storage device 21 of an energy storage capacitor or a rechargeable battery, it is possible to charge electric devices such as mobile phones.

Described motor rotation driving device comprises the pendulum 17 that can swing on mobile phone housing 1, and described pendulum 17 is installed on the mobile phone housing 1 by pendulum mounting shaft 24, and pendulum 17 and mobile phone housing 1 are provided with Pendulum drive gear 16, the pendulum drive gear 16 is fixedly connected with the pendulum 17, the pendulum 17 and the pendulum drive gear 16 can swing on the mobile phone casing 1 around the pendulum installation shaft 24; the pendulum drive The gear 16 is matched and connected with the motor gear 3 on the output shaft of the micro motor 2 through the gear transmission connection mechanism on the mobile phone housing 1 .

In the embodiment of the present utility model, a pendulum base 18 is installed on the mobile phone case 1, and the pendulum base 18 is fixed on the mobile phone case 1, and the pendulum 17 and the pendulum driving gear 16 are mounted around the pendulum shaft. 24 swings along the pendulum base 18, and the swing of the pendulum 17 around the pendulum mounting shaft 24 refers to clockwise or counterclockwise rotation along the pendulum base 18. Generally, the swing of the pendulum 17 and the pendulum driving gear 16 can be realized by shaking the mobile phone. When the pendulum drive gear 16 rotates with the pendulum 17, the power generated by the pendulum drive gear 16 when swinging drives the micro motor 2 to rotate through the gear transmission connection mechanism and the motor gear 3, that is, the process of driving the micro motor 2 to generate electricity after rotation is realized.

As shown in Figure 4, the gear transmission connection mechanism includes a swing transmission gear set for transmitting and outputting the swing force generated when the pendulum drive gear 16 swings, and the swing transmission gear set is connected to the mainspring through the intermediate transmission gear set. The transmission gear mechanism is meshed;

The clockwork transmission gear mechanism includes a clockwork 6 and a clockwork winding gear 8 for tightening the clockwork 6, and the clockwork tightening gear 8 is installed on the mobile phone casing through a clockwork transmission support shaft 7 1, the spring winding gear 8 is provided with a barrel 5 for accommodating the spring 6, the center of the spring 6 is connected with the axis of the spring winding gear 8, and the outside of the spring 6 is connected to the The inner wall of the barrel 5 is connected; the outer wall of the barrel 5 is provided with a barrel gear 25, and the barrel gear 25 can be meshed with the first connection transmission gear 4 on the mobile phone housing 1, and the first connection The transmission gear 4 can rotate on the mobile phone casing 1, and the first connection transmission gear 4 is also meshed with the motor gear 3.

In the embodiment of the present utility model, the power generated by the pendulum driving gear 16 is transmitted and output through the swing transmission gear set, and further transmitted to the mainspring transmission gear mechanism through the intermediate connection transmission gear set, and the mainspring transmission gear mechanism passes through the first connection The transmission gear 4 is transmitted to the motor gear 3 . The first connecting transmission gear 4 is installed on the mobile phone casing 1 through the first gear mounting shaft 22, and can rotate on the mobile phone casing 1 around the first gear mounting shaft 22.

The spring winding gear 8 and the barrel 5 are coaxially distributed, and the barrel 5 is installed on the spring winding gear 8, and both the winding winding gear 8 and the barrel 5 can drive the supporting shaft 7 around the spring turn. The center of the mainspring 6 is connected to the axis of the mainspring winding gear 8, the mainspring 6 can be tightened by the continuous rotation of the mainspring winding gear 8, and the spring box 5 can be driven to rotate by the release of the elastic force of the mainspring 6 , the barrel gear 25 on the barrel 5 meshes with the first connecting transmission gear 4, thereby driving the rotation of the first connecting transmission gear 4, which drives the rotation of the motor gear 3 after the first connecting transmission gear 4 rotates.

As shown in Figures 2 and 3, the intermediate connection transmission gear set includes a second connection transmission gear 9, a third connection transmission gear 11, a fourth connection transmission gear 12, and a fifth connection transmission gear 14; wherein, the second connection The transmission gear 9 is coaxially distributed with the third connection transmission gear 11 and can rotate synchronously, the fourth connection transmission gear 12 is coaxially distributed with the fifth connection transmission gear 14 and can rotate synchronously; the third connection transmission gear 11 is tightened with the mainspring The gears 8 are meshed, the second connecting transmission gear 9 is meshed with the fifth connecting transmission gear 14, and the fourth connecting transmission gear 12 is connected and matched with the swing transmission gear set.

In the embodiment of the present utility model, the second connection transmission gear 9 is located directly above the third connection transmission gear 11, and the second connection transmission gear 9 and the third connection transmission gear 11 are installed on the mobile phone casing 1 through the second gear installation shaft 23. Above, the outer diameter of the second connecting transmission gear 9 is larger than the outer diameter of the third connecting transmission gear 11 . The fourth connection transmission gear 12 is located directly below the fifth connection transmission gear 14 , and the outer diameter of the fourth connection transmission gear 12 is larger than that of the fifth connection transmission gear 14 . The fourth connection transmission gear 12 and the fifth connection transmission gear 14 are installed on the mobile phone housing 1 through the third gear mounting shaft 28, and the fourth connection transmission gear 12 can drive the fifth connection transmission gear 14 to rotate synchronously, that is, to connect the transmission gear in the middle. In the gear set, after the fourth connection transmission gear 12 rotates, it can drive the fifth connection transmission gear 14 to rotate synchronously, and after the fifth connection transmission gear 14 rotates, it can drive the second connection transmission gear 9 to rotate, and the second connection rotation gear 9 can rotate Drive the synchronous rotation of the third connection transmission gear 11.

As shown in Figures 5 and 6, the swing transmission gear set includes a forward gear set and a reverse gear set; the forward gear set includes a forward gear 19 and a forward gear coaxially distributed with the forward gear 19. Gear 20, the reverse gear set includes a reverse upper gear 15 and a reverse lower gear 13 coaxially distributed with the reverse upper gear 15, the pendulum drive gear 16 meshes with the forward upper gear 19 and the reverse upper gear 15 at the same time, and the forward The down gear 20 meshes with the reverse lower gear 13 , and the reverse lower gear 13 meshes with the fourth connection transmission gear 12 .

In the embodiment of the present utility model, since the swing of the pendulum drive gear 16 can be changed between clockwise and counterclockwise, in order to always output the power when the pendulum drive gear 16 swings, through the forward gear set and the reverse gear set Cooperate with the pendulum drive gear 16, when the pendulum drive gear 16 swings clockwise or counterclockwise, the output can be transmitted through the fourth connection transmission gear 12 in the intermediate connection transmission mechanism, and the fourth connection transmission gear 12 can pass through after rotating The intermediate connection transmission mechanism, the spring transmission gear mechanism, and the first connection transmission gear 4 are transmitted to the motor gear 3 of the micro-motor 2 .

Specifically, the forward gear 19 is located above the forward gear 20, and a forward gear ratchet mechanism is provided between the forward gear 19 and the forward downward gear 20, and the forward gear ratchet mechanism includes a forward rotation ratchet mechanism. The pawl 27 and the forward ratchet matched with the forward rotation pawl 27, the forward gear 19 can drive the forward gear 20 to rotate through the forward gear ratchet mechanism when the forward gear 19 rotates clockwise.

In the embodiment of the present invention, when the forward gear 19 rotates clockwise after being driven by the pendulum drive gear 16, the positive downward gear 20 is driven to rotate clockwise through the cooperation of the forward rotating pawl 27 and the forward ratchet. When the forward gear 19 rotates counterclockwise under the action of the pendulum drive gear 16, the forward rotation pawl 27 is not stressed, and at this moment, the forward gear 20 does not rotate. During specific implementation, the forward rotation pawl 27 is located on the positive, downward and downward gears 20, the positive upward gear 19 and the forward downward gear 19 are installed on the mobile phone housing 1 through the forward gear set mounting shaft, and can rotate around the positive direction. The gear set mounting shaft turns.

The reverse upper gear 15 is located above the reverse lower gear 13, and a reverse gear ratchet mechanism is provided between the reverse upper gear 19 and the reverse lower gear. The reverse gear ratchet mechanism includes a reverse rotation pawl 26 and a The reverse ratchet matched by the reverse rotation pawl 26 can drive the reverse lower gear 13 to rotate when the reverse upper gear 15 rotates counterclockwise through the reverse gear ratchet mechanism.

In the embodiment of the utility model, when the reverse upper gear 15 rotates clockwise under the action of the pendulum driving gear 16, the reverse rotation pawl 26 is not stressed at this time, and at this time, the reverse lower gear 13 will not rotate. And when the reverse upper gear 15 rotates counterclockwise under the effect of the pendulum drive gear 16, the reverse rotation ratchet 26 cooperates with the reverse ratchet, which can drive the rotation of the reverse lower gear 13. During specific implementation, the reverse rotation pawl 26 is located on the reverse lower gear 13, the reverse upper gear 15 and the reverse lower gear 13 are installed on the mobile phone casing 1 through the reverse gear set mounting shaft, and can rotate around the reverse direction. The gear set mounting shaft turns.

The reverse upper gear 15 and the forward upward gear 19 are not in contact with each other. When the pendulum driving gear 16 swings clockwise, the reverse upper gear 15 and the forward upward gear 19 both rotate counterclockwise, and the reverse lower gear 13 in the reverse gear set Rotate under the action of the reverse upper gear 15, because the reverse lower gear 13 meshes with the forward and lower gear 20, now the forward and lower gear 20 also follows the reverse lower gear 13 to rotate, and the forward and lower gear 20 is connected to the fourth transmission The gears 12 mesh and can drive the rotation of the fourth connecting transmission gear 12 .

When the pendulum driving gear 16 swings counterclockwise, both the reverse upper gear 15 and the forward gear 19 rotate clockwise, and the forward gear 20 in the forward gear set rotates under the action of the forward gear 19, and the forward gear 20 It can drive the rotation of the reverse lower gear 13 and the fourth connecting transmission gear 12 .

During use, when people walk and shake the mobile phone, the pendulum 17 rotates forward/reversely around the pendulum base 18, and the pendulum drive gear 16 installed on the pendulum 17 drives the forward gear 19 and reverse gear in the forward gear set. The reverse upper gear 15 in the gear set rotates. Due to the effect of the forward and reverse gear sets, no matter whether the pendulum 17 rotates forward or reverse, the reverse lower gear 13 in the reverse gear set always rotates counterclockwise, driving the first gear meshed with it. The four-link transmission gear 12 rotates clockwise. The fifth connection transmission gear 14 and the fourth connection transmission gear 12 are installed coaxially and in the same direction. The fifth connection transmission gear 14 drives the second connection transmission gear 9 to rotate counterclockwise by clockwise rotation, and the third connection transmission gear 11 and The second connecting transmission gear 9 is installed coaxially and in the same direction, and the third connecting transmission gear 11 rotates counterclockwise to drive the spring winding gear 8 to rotate clockwise, and the center of the spring 6 is connected to the axis of the winding winding gear 8 , the mainspring 6 is tightened by the continuous rotation of the mainspring tightening gear 8, the outside of the mainspring 6 is connected with the mainspring box 5, and the spring box 5 is driven to rotate through the release of the elastic force of the mainspring 6, and the edge of the mainspring box 5 has The barrel gear 25 is used to drive the first connection transmission gear 4 meshed with it, and the motor gear 3 is driven by the first connection transmission 4, so that the micro motor 2 maintains a long-term high-speed rotation to generate direct current, which is filtered and rectified by the circuit board 10. Stable electric energy is stored in the electric energy storage device 21, so that the mobile phone can be charged through the charging interface of the electric energy device 21.

Claims (8)

1. A mobile phone case capable of generating electricity automatically, comprising a mobile phone case (1); it is characterized in that: an electric energy storage device (21) for storing electric energy is provided on the mobile phone case (1), and the electric energy The charging end of the energy storage device (21) is connected to the output end of the micro motor (2) on the mobile phone case (1), and the mobile phone case (1) is also provided with a motor for driving the micro motor (2) to generate electricity after rotation A rotating driving device, the motor rotating driving device is matched and connected with the micro motor (2), so as to charge and store the electric energy storage device (21) after driving the micro motor (2) to rotate. 2. The mobile phone casing capable of automatically generating electricity according to claim 1, characterized in that: the micro motor (2) is electrically connected to the electric energy storage device (21) through a rectification and filtering circuit board (10), and the rectification and filtering circuit board (10) is fixed on the mobile phone casing (1), and the rectification and filtering circuit board (10), the micro motor (2), and the electric energy storage device (21) are all located on the same side of the mobile phone casing (21), and the electric energy storage The device (21) includes an energy storage capacitor or a rechargeable battery. 3. The mobile phone casing capable of automatically generating electricity according to claim 1, characterized in that: the motor rotation drive device includes a pendulum (17) that can swing on the mobile phone casing (1), and the pendulum (17) ) is installed on the mobile phone casing (1) through the pendulum installation shaft (24), and a pendulum driving gear (16) is arranged between the pendulum (17) and the mobile phone casing (1), and the pendulum driving gear (16 ) is fixedly connected with the pendulum (17), and both the pendulum (17) and the pendulum driving gear (16) can swing on the mobile phone casing (1) around the pendulum installation shaft (24); the pendulum driving gear ( 16) The gear transmission connection mechanism on the mobile phone casing (1) is matched with the motor gear (3) on the output shaft of the micro motor (2). 4. The mobile phone casing capable of generating electricity automatically according to claim 3, characterized in that: the gear transmission connection mechanism includes a swing transmission gear set for transmitting and outputting the swing force generated when the pendulum drive gear (16) swings , the swing transmission gear set is meshed with the spring transmission gear mechanism through the intermediate connection transmission gear set; The mainspring transmission gear mechanism includes a mainspring (6) and a mainspring tightening gear (8) for tightening the mainspring (6), and the mainspring tightening gear (8) is driven by the mainspring The support shaft (7) is installed on the mobile phone casing (1), and the spring winding gear (8) is provided with a barrel (5) for accommodating the spring (6), and the spring (6) The center of the spring is connected with the shaft center of the winding gear (8), and the outside of the spring (6) is connected with the inner wall of the barrel (5); the outer wall of the barrel (5) is provided with a barrel gear ( 25), the barrel gear (25) can mesh with the first connecting transmission gear (4) on the mobile phone casing (1), and the first connecting transmission gear (4) can be on the mobile phone casing (1) Rotate, and the first connecting transmission gear (4) is also meshed with the motor gear (3). 5. The mobile phone casing capable of generating electricity automatically according to claim 4, characterized in that: the intermediate connection transmission gear set includes a second connection transmission gear (9), a third connection transmission gear (11), a fourth connection transmission gear gear (12) and the fifth connecting transmission gear (14); wherein, the second connecting transmission gear (9) and the third connecting transmission gear (11) are coaxially distributed and can rotate synchronously, and the fourth connecting transmission gear (12) and The fifth connection transmission gear (14) is coaxially distributed and can rotate synchronously; the third connection transmission gear (11) meshes with the spring winding gear (8), and the second connection transmission gear (9) and the fifth connection transmission gear (14) are meshed, and the fourth connecting transmission gear (12) is connected and matched with the swing transmission gear set. 6. The mobile phone casing capable of generating electricity automatically according to claim 5, characterized in that: the swing transmission gear set includes a forward gear set and a reverse gear set; the forward gear set includes a forward gear (19) and The positive and downward gears (20) distributed coaxially with the forward and upward gears (19), and the reverse gear set includes a reverse upper gear (15) and a reverse lower gear ( 13), the pendulum driving gear (16) meshes with the forward gear (19) and the reverse gear (15) at the same time, the forward gear (20) meshes with the reverse gear (13), and the reverse gear The gear (13) meshes with the fourth connecting transmission gear (12). 7. The mobile phone case capable of generating electricity automatically according to claim 6, characterized in that: the forward gear (19) is located above the forward gear (20), and the forward gear (19) is connected to the forward gear A forward gear ratchet mechanism is provided between the gears (20), and the forward gear ratchet mechanism includes a forward rotation pawl (27) and a forward ratchet matched with the forward rotation pawl (27). The gear (19) can drive the forward gear (20) to rotate through the forward gear ratchet mechanism when it rotates clockwise. 8. The mobile phone case capable of generating electricity automatically according to claim 6, characterized in that: the reverse upper gear (13) is located above the reverse lower gear (15), and the reverse upper gear (19) is connected to the reverse lower gear A reverse gear ratchet mechanism is provided between the gears, and the reverse gear ratchet mechanism includes a reverse rotation pawl (26) and a reverse ratchet matched with the reverse rotation pawl (26), and the reverse upper gear (13 ) can drive the reverse lower gear (15) to rotate through the reverse gear ratchet mechanism when rotating counterclockwise.