Bracket and wireless charging stand

Abstract

The present application relates to a bracket and a wireless charging stand, and the bracket can be used to clamp an electronic device. The bracket includes a base, a second arm, a third arm, and a fourth arm, and the base includes a first arm. The second arm is provided on the base and is disposed opposite to the first arm. The third arm and the fourth arm are both provided on the base. A driving mechanism is provided on the base and can drive the second arm, the third arm, and the fourth arm to move relative to the base, so that the second arm approaches the first arm along a first direction, and the third arm and the fourth arm approach each other in a second direction to limit the electronic device on the base. The driving mechanism can also drive the second arm to move away from the first arm along the first direction, and the third arm and the fourth arm move away from each other in the second direction, so that the electronic device can be detached from the base. The above-mentioned bracket can clamp the electronic device in two directions, so that the electronic device can be reliably limited on the bracket, and the driving mechanism is easy to realize automatic control to improve the convenience of using the bracket.

Description

Technical Field

[0001] This application relates to the technical field of charging stands, and particularly to a bracket and a wireless charging stand. Background Art

[0002] When an in-vehicle mobile phone bracket is in use, the bracket generally clamps both sides of the mobile phone in the width direction. After the bracket rotates relative to the support, there is a risk that the mobile phone will fall. Summary of the Invention

[0003] An embodiment of this application provides a bracket and a wireless charging stand, and the bracket can reliably clamp an electronic device.

[0004] A bracket that can be used to clamp an electronic device, the bracket includes:

[0005] A base including a first arm;

[0006] A second arm provided on the base and disposed opposite to the first arm;

[0007] A third arm and a fourth arm, both provided on the base; and

[0008] A driving mechanism provided on the base and capable of driving the second arm, the third arm, and the fourth arm to move relative to the base, so that the second arm approaches the first arm in a first direction, and the third arm and the fourth arm approach each other in a second direction to limit the electronic device to the base; the driving mechanism can also drive the second arm to move away from the first arm in the first direction, and the third arm and the fourth arm move away from each other in the second direction, so that the electronic device can be detached from the base.

[0009] In the above bracket, since the driving mechanism can drive the second arm to approach the first arm in the first direction and make the third arm and the fourth arm approach each other in the second direction, the bracket can clamp the electronic device in two directions respectively, preventing the electronic device from easily slipping out of the bracket after the bracket rotates relative to the support, so that the electronic device can be reliably limited to the bracket, and the driving mechanism is easy to achieve automatic control to improve the convenience of using the bracket.

[0010] In one embodiment, the driving mechanism includes a motor and a transmission gear. The motor is connected to the base, the transmission gear is connected to the output shaft of the motor, the second arm includes a first rack engaged with the transmission gear, and the first rack extends in the first direction; the third arm includes a second rack extending in the second direction, and the fourth arm includes a third rack extending in the second direction. The motor can drive the first rack to move in the first direction through the transmission gear and drive the second rack and the third rack to move in the second direction.

[0011] In one embodiment, the second rack is meshed with the transmission gear, the driving mechanism includes a reversing gear rotatably connected to the base, the third arm includes a fourth rack fixedly connected to the second rack, and the third rack and the fourth rack are meshed on opposite sides of the reversing gear; the motor can drive the second rack and the fourth rack to move in the second direction to drive the reversing gear to rotate and drive the third rack to move in the direction opposite to the moving direction of the second rack.

[0012] In one embodiment, the transmission gear includes a driving gear, an intermediate gear and an output gear, the intermediate gear is meshed between the driving gear and the output gear, and the intermediate gear is rotatably connected to the base, the driving gear is fixedly connected to the output shaft of the motor, and the output gear is rotatably connected to the base; the output gear includes a coaxial first gear and a second gear, the pitch circle radius of the first gear is smaller than the pitch circle radius of the second gear, and the first gear is meshed with the first rack, and the second gear is meshed with the second rack.

[0013] In one embodiment, the third arm includes a first slide, a first baffle and a first transmission member, the first baffle is connected to the first slide, and at least one of the first baffle and the first slide is slidably matched with the base; the second rack and the fourth rack are located on the first transmission member, the first transmission member is fixedly connected to the first slide, and the first baffle can be telescopically moved in a second direction relative to the first slide.

[0014] In one embodiment, the third support arm includes an elastic member and a limiting member, the limiting member is fixedly connected to the first baffle plate and is enclosed with the first slide plate and the first baffle plate to form a cavity, the elastic member is accommodated in the cavity and one end of the elastic member abuts the first slide plate, and the other end of the elastic member abuts the limiting member, and when the first baffle plate moves relative to the first slide plate in a direction away from the fourth support arm, the limiting member compresses the elastic member.

[0015] In one embodiment, the fourth arm includes a second slide, a second baffle and a second transmission member, the second baffle is connected to the second slide, and at least one of the second baffle and the second slide is slidably matched with the base, and the third rack is located on the second transmission member; a first rib is provided on the side of the first transmission member facing away from the first slide, and a second rib is provided on the side of the second transmission member facing the second slide, the first rib and the second rib both extend in the second direction, and the side of the second rib facing the third gear is slidably matched with the first rib.

[0016] In one embodiment, the base is provided with a third rib, and the third rib abuts against a side of the second transmission member facing away from the second sliding plate and is slidably engaged with the second transmission member.

[0017] In one embodiment, the bracket includes a first position sensor and a second position sensor. The first position sensor is disposed on the base or the third arm, and the second position sensor is disposed on the base or the third arm. The first position sensor is used to detect a first limit position of the third arm, the second position sensor is used to detect a second limit position of the third arm, and both the first position sensor and the second position sensor are communicatively connected to the driving mechanism.

[0018] In one embodiment, the base includes a top surface, a bottom surface disposed opposite to each other, and a side surface located between the top surface and the bottom surface. The second arm, the third arm, and the fourth arm all protrude from the top surface and can move on the side where the top surface is located, and the side surface is provided with heat dissipation holes.

[0019] In one embodiment, the bottom surface is provided with a wire routing hole and a mounting hole. The wire routing hole and the mounting hole are spaced apart, and the cross-section of the mounting hole is polygonal.

[0020] In one embodiment, buffer pads for abutting against the electronic device are provided on a side of the first arm facing the second arm, a side of the second arm facing the first arm, a side of the third arm facing the fourth arm, and a side of the fourth arm facing the third arm.

[0021] In one embodiment, the bracket includes a pressure sensor. The pressure sensor is disposed on at least one of the first arm, the second arm, the third arm, and the fourth arm, and the buffer pad covers the pressure sensor.

[0022] A wireless charging stand includes a coil module and the above-mentioned bracket, and the coil module is disposed inside the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1Schematic diagram of a wireless charging stand for an embodiment;

[0025] Figure 2 is Figure 1 Schematic diagram of the wireless charging stand shown clamping an electronic device;

[0026] Figure 3 is Figure 1 Exploded view of the wireless charging stand shown;

[0027] Figure 4 is Figure 1 Schematic diagram of another perspective of the wireless charging stand shown;

[0028] Figure 5 is Figure 1 First partial cross-sectional view of the wireless charging stand shown;

[0029] Figure 6 is Figure 5 Enlarged schematic diagram of area A of the wireless charging stand shown;

[0030] Figure 7 is Figure 1 Second partial cross-sectional view of the wireless charging stand shown;

[0031] Figure 8 is Figure 7 Schematic diagram of the third arm of the wireless charging stand shown;

[0032] Figure 9 is Figure 8 Partial cross-sectional view of the third arm of the wireless charging stand shown;

[0033] Figure 10 is Figure 1 Schematic diagram of the wireless charging stand shown with some structures removed;

[0034] Figure 11 is Figure 1 Third partial cross-sectional view of the wireless charging stand shown;

[0035] Figure 12 is Figure 1 Fourth partial cross-sectional view of the wireless charging stand shown;

[0036] Figure 13 is Figure 1 Fifth partial cross-sectional view of the wireless charging stand shown.

[0037] Reference numerals: 10, wireless charging stand; 11, bracket; 111, base; 111a, first arm; 111b, top surface; 111c, bottom surface; 111d, side surface; 111e, heat dissipation hole; 111f, wire routing hole; 111g, mounting hole; 111h, third rib; 1111, upper cover; 1113, lower cover; 113, second arm; 113a, first rack; 115, third arm; 115a, second rack; 115b, fourth rack; 115c, cavity; 1151, first slide plate; 1151a, slideway; 1153, first baffle; 1153a, slide rail; 1155, first transmission member; 1155a, first rib; 1157, elastic member; 1159, limiting member; 117, fourth arm; 117a, third rack; 1171, second slide plate; 1173, second baffle; 1175, second transmission member; 1175a, second rib; 119, drive mechanism; 1191, motor; 1193, transmission gear; 1193a, driving gear; 1193b, intermediate gear; 1193c, output gear; 1193c1, first gear; 1193c2, second gear; 1195, reversing gear; 12, coil module; 13, infrared sensor; 15, first position sensor; 16, buffer pad; 17, pressure sensor; 20, electronic device. Detailed implementation manners

[0038] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0039] Please refer to Figure 1 and Figure 2 As shown in the drawings, the present application discloses a wireless charging stand 10, which can be used to charge an electronic device 20 with a wireless charging function. For example, the wireless charging stand 10 can charge a smart phone with a wireless charging function. In other embodiments, the wireless charging stand 10 can also be used to wirelessly charge an electronic device 20 such as a tablet computer or a handheld game console with a wireless charging function.

[0040] Referring to Figure 3 the drawings, the wireless charging stand 10 includes a bracket 11 and a coil module 12, and the coil module 12 is disposed inside the bracket 11. The bracket 11 can be used to be mounted on a support such as a vehicle body, and the bracket 11 can clamp the electronic device 20. After the bracket 11 clamps the electronic device 20 and the power is turned on, the coil module 12 can wirelessly charge the electronic device 20 by using the electromagnetic induction principle, so as to improve the convenience of charging.

[0041] Continue to refer to Figure 3 , the bracket 11 includes a base 111, a second arm 113, a third arm 115, a fourth arm 117 provided on the base 111, and a driving mechanism 119. The base 111 includes a first arm 111a. For example, in the present embodiment, the first arm 111a is formed by extending from the edge of the base 111. The second arm 113 is disposed opposite to the first arm 111a, the third arm 115 and the fourth arm 117 are disposed opposite to each other, and the driving mechanism 119 is provided on the base 111 and can drive the second arm 113, the third arm 115, and the fourth arm 117 to move relative to the base 111, so that the second arm 113 approaches the first arm 111a along a first direction, and the third arm 115 and the fourth arm 117 approach each other in a second direction to limit the electronic device 20 to the base 111, as Figure 2 shown. The driving mechanism 119 can also drive the second arm 113 to move away from the first arm 111a along the first direction, and the third arm 115 and the fourth arm 117 move away from each other in the second direction, so that the electronic device 20 can be detached from the base 111.

[0042] Further, in combination with Figure 3 and Figure 4 , in some embodiments, the base 111 is generally in the shape of a rounded rectangle, that is, the four corners of the rectangle are transitioned by arcs. The base 111 includes a top surface 111b, a bottom surface 111c disposed opposite to each other, and a side surface 111d located between the top surface 111b and the bottom surface 111c. The second arm 113, the third arm 115, and the fourth arm 117 all protrude from the top surface 111b and can move on the side where the top surface 111b is located. Further, the first direction is parallel to the width direction of the rectangle, and the second direction is parallel to the length direction of the rectangle, that is, the second arm 113 can move along the width direction of the rectangle to approach or move away from the first arm 111a, and the third arm 115 and the fourth arm 117 can approach or move away from each other in the length direction of the rectangle. Further, the side surface 111d of the base 111 is provided with heat dissipation holes 111e, so that the wireless charging stand 10 can dissipate heat effectively during the charging process to improve the charging efficiency. Of course, the top surface 111b and the bottom surface 111c of the base 111 can also be provided with heat dissipation holes 111e. Further, referring to Figure 4 , the bottom surface 111c is provided with a wire routing hole 111f and a mounting hole 111g. The wire routing hole 111f and the mounting hole 111g are spaced apart. The cross-section of the mounting hole 111g is polygonal. For example, the cross-section of the mounting hole 111g can be a regular pentagon or a regular hexagon, etc. The wire routing hole 111f can be in the shape of an arc groove for passing through a cable, and the mounting hole 111g can be used to mount the bracket 11 on other components such as a support.

[0043] Further, in some embodiments, the base 111 may include an upper cover 1111 and a lower cover 1113. The upper cover 1111 and the lower cover 1113 may be snapped together and fixedly connected by threaded fasteners. The top surface 111b is located on the upper cover 1111, the bottom surface 111c is located on the lower cover 1113, and the side surface 111d is jointly formed by a partial side surface of the upper cover 1111 and a partial side surface of the lower cover 1113. The threaded holes of the threaded fasteners may be exposed on the bottom surface 111c, and the exposed threaded holes may be covered with PVC (Polyvinyl chloride) decorative pieces to enhance the appearance characteristics of the base 111. In other embodiments, the base 111 may be disassembled into two semi-box-shaped structural members in the first direction or the second direction, and the two semi-box-shaped structural members are butted to form a base 111 in the shape of a rounded rectangle. Of course, in other embodiments, the base 111 may be in other shapes such as an oval or a trapezoid or other polygons, etc.

[0044] Continue to refer to Figure 3 , in some embodiments, the base 111 is provided with an infrared sensor 13, and the infrared sensor 13 is communicatively connected to the driving mechanism 119. When the wireless charging stand 10 is in the uncharged state, the second arm 113 may be located at the farthest position from the first arm 111a, and the third arm 115 and the fourth arm 117 may be located at the limit positions. When the electronic device 20 approaches the top surface 111b of the base 111, the infrared sensor 13 detects the approach of the electronic device 20 to the bracket 11, and a trigger signal can be generated to the driving mechanism 119, so that the driving mechanism 119 is activated and drives the second arm 113 to approach the first arm 111a in the first direction, and drives the third arm 115 and the fourth arm 117 to approach each other in the second direction, so as to limit the electronic device 20 to the base 111. When the user needs to remove the electronic device 20, other structures such as a button may be used to apply a trigger signal, so that the driving mechanism 119 is activated and drives the second arm 113 to move away from the first arm 111a in the first direction, and the third arm 115 and the fourth arm 117 move away from each other in the second direction, so that the electronic device 20 can be removed from the base 111. Of course, the setting of the infrared sensor 13 is not necessary. For example, a button can be used to activate the driving mechanism 119 to clamp the electronic device 20 by the bracket 11 or enable the electronic device 20 to be removed from the bracket 11.

[0045] Please refer to Figure 5 and Figure 6, the driving mechanism 119 includes a motor 1191 and a transmission gear 1193. The motor 1191 is connected to the base 111, and the transmission gear 1193 is connected to the output shaft of the motor 1191. The second arm 113 includes a first rack 113a that meshes with the transmission gear 1193, and the first rack 113a extends in a first direction. The third arm 115 includes a second rack 115a that extends in a second direction, and the fourth arm 117 includes a third rack 117a that extends in the second direction. The motor 1191 can drive the first rack 113a to move in the first direction through the transmission gear 1193, and drive the second rack 115a and the third rack 117a to move in the second direction. Specifically, the transmission gear 1193 may include at least one gear to increase the output torque of the motor 1191 so as to drive the second arm 113, the third arm 115, and the fourth arm 117 to move. The second rack 115a meshes with the transmission gear 1193. The driving mechanism 119 includes a reversing gear 1195 that is rotatably connected to the base 111. The third arm 115 includes a fourth rack 115b that is fixedly connected to the second rack 115a. The third rack 117a and the fourth rack 115b mesh with opposite sides of the reversing gear 1195. The motor 1191 can drive the second rack 115a and the fourth rack 115b to move in the second direction, so as to drive the reversing gear 1195 to rotate and drive the third rack 117a to move in a direction opposite to the moving direction of the second rack 115a. Further, in this embodiment, the axis direction of rotation of the reversing gear 1195 is parallel to the first direction. The reversing gear 1195 is relatively wide. One side of it meshes with the fourth rack 115b, and the opposite side of it meshes with the third rack 117a, so that the moving direction of the third rack 117a is opposite to the moving direction of the fourth rack 115b, that is, the moving directions of the third arm 115 and the fourth arm 117 are opposite.

[0046] In this embodiment, the transmission gear 1193 includes a driving gear 1193a, an intermediate gear 1193b, and an output gear 1193c. The intermediate gear 1193b is meshed between the driving gear 1193a and the output gear 1193c, and the intermediate gear 1193b is rotatably connected to the base 111. The driving gear 1193a is fixedly connected to the output shaft of the motor 1191, and the output gear 1193c is rotatably connected to the base 111. The output gear 1193c includes a first gear 1193c1 and a second gear 1193c2 that are coaxial. The pitch circle radius of the first gear 1193c1 is smaller than the pitch circle radius of the second gear 1193c2, and the first gear 1193c1 is meshed with the first rack 113a, and the second gear 1193c2 is meshed with the second rack 115a. Specifically, in this embodiment, the intermediate gear 1193b includes three stages of gears, and each stage of gear includes a large gear and a small gear that are coaxially arranged. The large gear of the second stage is meshed with the small gear of the first stage, the small gear of the second stage is meshed with the large gear of the third stage, the large gear of the first stage is meshed with the driving gear 1193a, and the small gear of the third stage is meshed with the output gear 1193c, so as to obtain an appropriate transmission ratio.

[0047] The setting that the pitch circle radius of the first gear 1193c1 is smaller than the pitch circle radius of the second gear 1193c2 can make the movement of the first rack 113a and the movement of the second rack 115a form a speed difference, that is, make the movement of the third arm 115 in the second direction and the movement of the second arm 113 in the first direction form a speed difference. In an embodiment, the pitch circle diameter of the first gear 1193c1 is 3.2 mm, and the pitch circle diameter of the second gear 1193c2 is 7.2 mm. According to the calculation formula of the linear velocity of the gear v=(D / 2)*ω, where D is the pitch circle diameter of the gear and ω is the angular velocity of the gear, it is known that the ratio of the linear velocity of the second gear 1193c2 to the linear velocity of the first gear 1193c1 is 7.2 / 3.2, which is about 2.25 times. In other words, the moving speed of the third arm 115 in the second direction can be about 2.25 times the moving speed of the second arm 113 in the first direction. Of course, through the structural design of the fourth rack 115b and the reversing gear 1195, the moving speed of the fourth arm 117 can be made equal to the moving speed of the third arm 115. In this embodiment, the relative moving speed of the third arm 115 and the fourth arm 117 in the second direction is twice the moving speed of the third arm 115, that is, the size change speed of the third arm 115 and the fourth arm 117 in the second direction can be 4.5 times the size change speed of the first arm 111a and the second arm 113 in the first direction, so as to better adapt to the size of the rectangular block-shaped electronic device 20.

[0048] The setting that the moving speed of the fourth arm 117 is equal to the moving speed of the third arm 115 can achieve a centering effect in the second direction, that is, it can make the central area of the electronic device 20 and the central area of the base 111 centered in the second direction. Of course, this setting is not necessary. For example, the moving speed of the fourth arm 117 can be unequal to the moving speed of the third arm 115, and the ratio of their relative speed to the moving speed of the second arm 113 can still be estimated according to the above calculation method. For the design of the coil module 12 being offset relative to the center of the base 111 in the second direction, the above structure can be well adapted.

[0049] It can be understood that the rotational connection structure between the intermediate gear 1193b and the base 111 and the rotational connection structure between the output gear 1193c and the base 111 can have various forms. For example, each stage of the intermediate gear 1193b can be provided with a protruding rotating shaft, and the base 111 is provided with a shaft hole that can be rotationally matched with the rotating shaft. Another example is that each stage of the intermediate gear 1193b can be provided with a shaft hole, and the base 111 is provided with a protruding rotating shaft and is rotationally matched with the shaft hole. Further, the base 111 can be provided with a boss structure, and the boss structure can abut against the end face of the gear to limit the axial movement of the gear. It can be understood that the number of stages of the intermediate gear 1193b can be reduced, and even the intermediate gear 1193b can be omitted, that is, the driving gear 1193a meshes with the output gear 1193c.

[0050] To better adapt to electronic devices 20 with different aspect ratios, the third arm 115 can be designed as a flexible structure, that is, a structure with a size that can be telescopically changed, and combined with the structure of the output gear 1193c to achieve a differential movement between the second arm 113 and the third arm 115 through the output gear 1193c, and use the flexible structure of the third arm 115 to adapt to electronic devices 20 with different aspect ratios. This structure of the bracket 11 can not only improve the clamping and releasing efficiency but also adapt to electronic devices 20 with different aspect ratios.

[0051] Specifically, please refer to Figure 7 、 Figure 8 and Figure 9, the third arm 115 includes a first sliding plate 1151, a first baffle 1153 and a first transmission member 1155. The first baffle 1153 is connected to the first sliding plate 1151, and at least one of the first baffle 1153 and the first sliding plate 1151 is slidably engaged with the base 111. For example, the base 111 may be provided with a chute, and the first sliding plate 1151 is slidably engaged with the chute. Further, to prevent the first sliding plate 1151 from easily disengaging from the chute, a rib may be provided at the edge of the first sliding plate 1151, and the rib is slidably engaged with the chute to limit the first sliding plate 1151 from disengaging from the chute in the thickness direction of the base 111. Of course, the anti-disengagement structure between the first sliding plate 1151 and the base 111 may be replaced with other forms. For example, the base 111 may be provided with a kidney-shaped hole, and the first sliding plate 1151 is fixedly connected to a large-headed bolt, and the screw of the large-headed bolt passes through the kidney-shaped hole, and the large-headed structure of the bolt can be used to prevent the first sliding plate 1151 from easily disengaging from the base 111.

[0052] The first transmission member 1155 is generally in the shape of a plate, and the second rack 115a and the fourth rack 115b are located on the first transmission member 1155. In this embodiment, the second rack 115a faces the first arm 111a, and the fourth rack 115b faces the bottom surface 111c of the base 111. Further, in this embodiment, both the second rack 115a and the fourth rack 115b are rack-shaped structures directly formed on the first transmission member 1155. In other embodiments, the second rack 115a and the fourth rack 115b may be assembled and fixed to the first transmission member 1155. For example, the second rack 115a or the fourth rack 115b may be fixedly connected to the first transmission member 1155 by a threaded fastener, or may be fixedly connected to the first transmission member 1155 by means of bonding or welding. In this embodiment, the second rack 115a and the fourth rack 115b may be made of a relatively wear-resistant material, and the first transmission member 1155 may be made of a material with a relatively low cost, so that the third arm 115 can achieve a balance between performance and cost. The first transmission member 1155 is fixedly connected to the first sliding plate 1151, and the first baffle 1153 can telescopically move relative to the first sliding plate 1151 in the second direction.

[0053] Specifically, refer to Figure 7 , Figure 9, the third arm 115 includes an elastic member 1157 and a limiting member 1159. The limiting member 1159 is fixedly connected to the first baffle 1153 and encloses a cavity 115c with the first sliding plate 1151 and the first baffle 1153. The elastic member 1157 is accommodated in the cavity 115c, one end of the elastic member 1157 abuts against the first sliding plate 1151, and the other end of the elastic member 1157 abuts against the limiting member 1159. When the first baffle 1153 moves away from the fourth arm 117 relative to the first sliding plate 1151, the limiting member 1159 compresses the elastic member 1157. When the compressed elastic member 1157 releases its elastic potential energy, it can drive the first baffle 1153 to reset through the limiting member 1159. In this embodiment, the elastic member 1157 is a spring. In other embodiments, the elastic member 1157 can be a spring piece or an elastic column and other structural members.

[0054] Continue to refer to Figure 9 , in this embodiment, sliding grooves 1151a are provided at two opposite edges of the first sliding plate 1151, and sliding rails 1153a are formed at two opposite edges of the first baffle 1153. The sliding rails 1153a pass through the sliding grooves 1151a and are slidably engaged with the sliding grooves 1151a. The limiting member 1159 is in a block shape and is detachably connected to the first baffle 1153 by a threaded fastener to improve the convenience of assembly. For example, during the assembly process, the sliding rails 1153a of the first baffle 1153 can be first passed through the sliding grooves 1151a of the first sliding plate 1151, and then the elastic member 1157 can be assembled so that one end of the elastic member 1157 abuts against the first sliding plate 1151, and then the limiting member 1159 can be assembled and fixed to the first baffle 1153 by a threaded fastener so that the limiting member 1159 presses against the elastic member 1157.

[0055] Please refer to Figure 10 , the structure of the fourth arm 117 is similar to the structure of the third arm 115. In this embodiment, the fourth arm 117 includes a second sliding plate 1171, a second baffle 1173 and a second transmission member 1175. The second baffle 1173 is connected to the second sliding plate 1171, and at least one of the second baffle 1173 and the second sliding plate 1171 is slidably engaged with the base 111. In this embodiment, the second sliding plate 1171 and the second baffle 1173 are integrally formed. In other embodiments, the second sliding plate 1171 and the second baffle 1173 can also be arranged in a telescopic structure, which will not be elaborated here. The third rack 117a is located on the second transmission member 1175. The sliding fit structure between the second baffle 1173 and the base 111 can refer to the sliding fit structure between the first sliding plate 1151 and the base 111, which will not be elaborated here. The third rack 117a faces the top surface 111b of the base 111, and it can be integrally formed on the second transmission member 1175 or assembled on the second transmission member 1175, which will not be elaborated here.

[0056] Please continue to refer to Figure 10 , the bracket 11 includes a first position sensor 15 and a second position sensor (not shown in the figure). The first position sensor 15 is disposed on the base 111 or the third arm 115, and the second position sensor is disposed on the base 111 or the third arm 115. The first position sensor 15 is used to detect the first limit position of the third arm 115, and the second position sensor is used to detect the second limit position of the third arm 115. Both the first position sensor 15 and the second position sensor are communicatively connected to the driving mechanism 119. Among them, one of the first limit position and the second limit position corresponds to the position where the distance between the third arm 115 and the fourth arm 117 is the smallest. At this time, the third arm 115 and the fourth arm 117 move closer to each other to the limit position; the other of the first limit position and the second limit position corresponds to the position where the distance between the third arm 115 and the fourth arm 117 is the largest. At this time, the third arm 115 and the fourth arm 117 move away from each other to the limit position. At these two limit positions, the motor 1191 can receive a trigger signal and stop working to prevent damage to the transmission structure. The first position sensor 15 and the second position sensor can have various forms. For example, in this embodiment, both the first position sensor 15 and the second position sensor are leaf spring type position sensors. In other embodiments, the first position sensor 15 or the second position sensor can be an optical sensor or a magnetic sensor, etc.

[0057] Further, refer to Figure 10 , in some embodiments, a first rib 1155a is provided on the side of the first transmission member 1155 facing away from the first slide plate 1151, and the first rib 1155a extends along the second direction. A second rib 1175a is provided on the side of the second transmission member 1175 facing the second slide plate 1171, and the second rib 1175a extends along the second direction. The side of the second rib 1175a facing the third rack 117a is slidably engaged with the first rib 1155a. In other words, the side of the first rib 1155a facing the top surface 111b of the base 111 is slidably engaged with the second rib 1175a, and the first rib 1155a can limit the second transmission member 1175 in the thickness direction of the base 111. During the linkage between the reversing gear 1195 and the third rack 117a, the reversing gear 1195 exerts a component force along the thickness direction of the base 111 and downward on the third rack 117a. The first rib 1155a can prevent the second transmission member 1175 from moving downward, that is, can prevent the fourth arm 117 from moving downward, so that the fourth arm 117 can move smoothly. It can be understood that the limit of the third arm 115 in the thickness direction of the base 111 can adopt a similar structure. Of course, the base 111 can also support the third arm 115. For example, the base 111 supports and limits the first slide plate 1151, as Figure 11 shown.

[0058] Furthermore, referring to Figure 12 , the base 111 is provided with a third rib 111h. The third rib 111h abuts against the side of the second transmission member 1175 facing away from the second sliding plate 1171 and is in sliding cooperation with the second transmission member 1175. And the second transmission member 1175 abuts against the first transmission member 1155 in the first direction and is in sliding cooperation with the first transmission member 1155. In this embodiment, the third rib 111h of the base 111 abuts against the second transmission member 1175 in the first direction, and the second transmission member 1175 further abuts against the first transmission member 1155 in the first direction. This structural arrangement can prevent the first transmission member 1155 and the second transmission member 1175 from moving in the first direction during the transmission process, that is, it can prevent the third arm 115 and the fourth arm 117 from moving in the first direction, so that the second rack 115a can stably mesh with the second gear 1193c2, and enable the fourth rack 115b and the third rack 117a to stably mesh with the reversing gear 1195, thereby improving the stability of the movement of the third arm 115 and the fourth arm 117.

[0059] Referring to Figure 12 and Figure 13 , it can be understood that the sliding cooperation structure between the second arm 113 and the base 111 can be similar to the sliding cooperation structure between the first sliding plate 1151 and the base 111. The second arm 113 can have an appropriate length so that when the second arm 113 moves to the farthest distance from the first arm 111a, the output gear 1193c or the transmission gear 1193 is not exposed, thereby preventing dust or liquid from easily entering the base 111.

[0060] Furthermore, referring to Figure 12 , buffer pads 16 for abutting against the electronic device 20 are provided on the side of the first arm 111a facing the second arm 113, the side of the second arm 113 facing the first arm 111a, the side of the third arm 115 facing the fourth arm 117, and the side of the fourth arm 117 facing the third arm 115. The buffer pads 16 can be made of flexible materials such as silica gel or rubber to prevent the bracket 11 from scratching the surface of the electronic device 20 when the bracket 11 holds the electronic device 20. The flexible buffer pads 16 can also better wrap the side surface of the electronic device 20, so that the electronic device 20 can be firmly clamped by the bracket 11.

[0061] Further, the bracket 11 may include a pressure sensor 17 provided on the first support arm 111a, and the buffer pad 16 covers the pressure sensor 17. The pressure sensor 17 can be used to detect the clamping force of the first support arm 111a on the electronic device 20, so as to prevent the electronic device 20 from being damaged due to excessive clamping force of the bracket 11 on the electronic device 20. For example, the pressure sensor 17 can be communicatively connected to the motor 1191. When the pressure sensor 17 detects that the clamping force is greater than a preset value, the motor 1191 stops rotating, thereby preventing the bracket 11 from applying excessive clamping force to the electronic device 20. Since the position of the first support arm 111a on the base 111 remains unchanged, when the pressure sensor 17 is provided on the first support arm 111a, the electrical connection wires of the pressure sensor 17 are relatively easy to arrange. Of course, in other embodiments, the pressure sensor 17 can be provided on any one of the second support arm 113, the third support arm 115, and the fourth support arm 117, or on any two or any three of the first support arm 111a, the second support arm 113, the third support arm 115, and the fourth support arm 117, or pressure sensors 17 can be provided on all of the first support arm 111a, the second support arm 113, the third support arm 115, and the fourth support arm 117.

[0062] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0063] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A bracket that can be used to clamp an electronic device, characterized in that, the bracket includes: a base including a first arm; a second arm provided on the base and disposed opposite to the first arm; a third arm and a fourth arm, both provided on the base; and a driving mechanism provided on the base and capable of driving the second arm, the third arm and the fourth arm to move relative to the base, so that the second arm approaches the first arm in a first direction, and the third arm and the fourth arm approach each other in a second direction to limit the electronic device on the base; the driving mechanism can also drive the second arm to move away from the first arm in the first direction, and the third arm and the fourth arm move away from each other in the second direction, so that the electronic device can be detached from the base; the driving mechanism includes a motor and a transmission gear, the motor is connected to the base, the transmission gear is connected to the output shaft of the motor, the third arm includes a second rack extending in the second direction, and the fourth arm includes a third rack extending in the second direction; the second rack meshes with the transmission gear, the driving mechanism includes a reversing gear rotatably connected to the base, the third arm includes a fourth rack fixedly connected to the second rack, and the third rack and the fourth rack mesh with opposite sides of the reversing gear; the transmission gear is located on one side of the second rack in the first direction, the reversing gear is located on one side of the fourth rack in a direction perpendicular to the first direction and the second direction, the axial direction of the reversing gear is parallel to the first direction, and the output shaft of the motor and the axial direction of the transmission gear are perpendicular to the first direction and the second direction.

2. The bracket according to claim 1, characterized in that, the second arm includes a first rack meshing with the transmission gear, the first rack extends in the first direction, and the motor can drive the first rack to move in the first direction through the transmission gear and drive the second rack and the third rack to move in the second direction.

3. The bracket according to claim 2, characterized in that, the motor can drive the second rack and the fourth rack to move in the second direction to drive the reversing gear to rotate and drive the third rack to move in a direction opposite to the moving direction of the second rack.

4. The bracket according to claim 3, characterized in that, the transmission gear includes a driving gear, an intermediate gear and an output gear, the intermediate gear meshes between the driving gear and the output gear, and the intermediate gear is rotatably connected to the base, the driving gear is fixedly connected to the output shaft of the motor, and the output gear is rotatably connected to the base; the output gear includes a first gear and a second gear coaxially arranged, the pitch circle radius of the first gear is smaller than the pitch circle radius of the second gear, and the first gear meshes with the first rack, and the second gear meshes with the second rack.

5. The bracket according to claim 3, characterized in that, The third arm includes a first slide, a first baffle and a first transmission member, the first baffle is connected to the first slide, and at least one of the first baffle and the first slide is slidably matched with the base; the second rack and the fourth rack are located on the first transmission member, the first transmission member is fixedly connected to the first slide, and the first baffle can be telescopically moved in a second direction relative to the first slide.

6. The bracket according to claim 5, It is characterized in that The third support arm includes an elastic member and a limiting member, the limiting member is fixedly connected to the first baffle plate and is enclosed with the first slide plate and the first baffle plate to form a cavity, the elastic member is accommodated in the cavity and one end of the elastic member abuts the first slide plate, and the other end of the elastic member abuts the limiting member, when the first baffle plate moves relative to the first slide plate in a direction away from the fourth support arm, the limiting member compresses the elastic member.

7. The bracket according to claim 5, It is characterized in that The fourth support arm includes a second slide, a second baffle and a second transmission member, the second baffle is connected to the second slide, and at least one of the second baffle and the second slide is slidably matched with the base, and the third rack is located on the second transmission member; a first rib is provided on a side of the first transmission member facing away from the first slide, and a second rib is provided on a side of the second transmission member facing the second slide, the first rib and the second rib both extend in a second direction, and a side of the second rib facing the third rack is slidably matched with the first rib.

8. The bracket according to claim 7, It is characterized in that The base is provided with a third rib, and the third rib abuts against a side of the second transmission member away from the second slide plate and is slidably matched with the second transmission member.

9. The stent according to any one of claims 1 to 8, It is characterized in that The bracket includes a first position sensor and a second position sensor, the first position sensor is arranged on the base or the third arm, and the second position sensor is arranged on the base or the third arm, the first position sensor is used to detect the first extreme position of the third arm, and the second position sensor is used to detect the second extreme position of the third arm, and the first position sensor and the second position sensor are both communicatively connected to the driving mechanism.

10. The stent according to any one of claims 1 to 8, It is characterized in that The base includes a top surface, a bottom surface and a side surface located between the top surface and the bottom surface, the second arm, the third arm and the fourth arm all protrude from the top surface and can move on the side where the top surface is located, and the side surface is provided with heat dissipation holes.

11. The bracket according to claim 10, It is characterized in that The bottom surface is provided with a wiring hole and a mounting hole, the wiring hole and the mounting hole are spaced apart, and the cross section of the mounting hole is polygonal.

12. The stent according to any one of claims 1 to 8, It is characterized in that A buffer pad for abutting against the electronic device is provided on one side of the first arm facing the second arm, one side of the second arm facing the first arm, one side of the third arm facing the fourth arm, and one side of the fourth arm facing the third arm.

13. The bracket according to claim 12, wherein, the bracket includes a pressure sensor disposed on at least one of the first arm, the second arm, the third arm, and the fourth arm, and the buffer pad covers the pressure sensor.

14. A wireless charging stand, wherein, it includes a coil module and the bracket according to any one of claims 1-13, and the coil module is disposed in the base.

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