Charging device of electronic product

Abstract

The invention discloses a charging device for an electronic product, and relates to the technical field of electronic product charging, the charging device comprises a base, a clamping mechanism is arranged above the base, and the clamping mechanism comprises an adjusting part; the adjusting part comprises two mounting boxes, two mounting plates, a second sliding rod and two moving blocks, the left and right end faces of the second sliding rod are fixedly connected with the inner wall of the base, the outer surface of the second sliding rod is slidably sleeved with the moving blocks, and the left end faces of the mounting boxes fixedly penetrate through the right end faces of the mounting plates and extend to the left sides of the mounting plates; and two clamping parts which are symmetrical left and right are arranged above the base. According to the charging device of the electronic product, the double-thread screw, the second sliding rod, the moving blocks, the first connecting rod, the supporting pieces, the third spring, the mounting box and the second connecting rod are arranged, the double-thread screw is rotated, so that the two moving blocks get close to each other, and the two supporting pieces limit the outer surfaces of the left end and the right end of the electronic product; and the electronic product is clamped by the two supporting pieces by utilizing the elastic force of the third spring.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic product charging, and in particular to a charging device for an electronic product. Background Art

[0002] Electronic products are products that use electricity as their working basis. Most of them are equipped with mobile power supplies, which need to be recharged by charging devices.

[0003] A Chinese patent discloses a conveniently placed wireless charging device for electronic products, with the publication number CN107947281A. The device comprises a bracket and a charging body, wherein the bracket is provided with a groove, and the charging body is rotatably connected to one side of the groove. The charging body is provided with a fixing device, and the fixing device comprises a pair of splints, and the charging body is provided with a slide groove, and the two splints pass through the slide groove, and a telescopic device is provided between the two splints, and the telescopic device comprises a pair of spring shafts and a spring sleeve, and the two spring shafts are respectively inserted into the two ends of the spring sleeve, and the two splints are slidably sleeved with a movable sleeve, and the movable sleeve is set in the slide groove. The present invention has a simple design. Through the mutual cooperation of the charging body, splint, bracket, clamping shaft, fixed shaft and adjustment button, the charger can be placed not only on a flat surface but also on an inclined surface, and stability can be guaranteed. Charging can be done wirelessly and anytime, anywhere, providing users with a conveniently placed wireless charging device for electronic products.

[0004] However, this device still has the following disadvantages: the device places the electronic product between two clamping plates, and the clamping plates use the elastic force of the first spring to clamp the electronic product. However, electronic products vary in size and shape, resulting in wider electronic products being clamped too strongly, potentially causing damage, while smaller electronic products are clamped less strongly. To address this issue, we have proposed a charging device for electronic products. Summary of the Invention

[0005] The present invention provides a charging device for an electronic product to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A charging device for an electronic product, comprising a base, a clamping mechanism provided above the base, the clamping mechanism comprising an adjusting portion; The adjustment portion includes two mounting boxes, two mounting plates, a second slide bar and two moving blocks, the left and right end surfaces of the second slide bar are fixedly connected to the inner wall of the base, the moving block is slidably sleeved on the outer surface of the second slide bar, and the left end surface of the mounting box is fixedly passed through the right end surface of the mounting plate and extends to the left side of the mounting plate; Two left-right symmetrical clamping parts are provided above the base; The clamping part on the left side includes a bracket, a rotating plate, a slider and a first sliding rod. A through groove is provided on the outer surface of the bracket, and the inner wall of the through groove is fixedly connected to the outer surface of the first sliding rod. The sliding sleeve of the slider is provided with a first sliding rod. The left end face of the slider is hinged to the outer surface of the rotating plate, and the end face of the rotating plate away from the slider is hinged with a splint.

[0007] A further improvement to the technical solution of the present invention is that: a double-headed screw is provided through the threads on the left and right end faces of the two moving blocks, and the outer surface of the left end of the double-headed screw rotates through the inner wall of the base through the first bearing and extends to the left side of the base. By rotating the double-headed screw, the two moving blocks can be driven closer to each other.

[0008] A further improvement of the technical solution of the present invention is that: two support members are provided on the inner sides of the two mounting plates, and two baffles are provided on the inner wall of the mounting box, and the outer surfaces of the two baffles are respectively fixedly connected with a first connecting rod and a second connecting rod, and the outer surfaces of the first connecting rod and the second connecting rod both slide through the inner wall of the mounting box and extend to the outside of the mounting box, the outer surface of the first connecting rod is fixedly connected to the outer surface of the support member, and the outer surface of the second connecting rod is fixedly connected to the outer surface of the bracket. By setting the mounting box, the first connecting rod and the support member, it is convenient for the moving block to drive the support member to limit the electronic product.

[0009] A further improvement of the technical solution of the present invention is that: a third spring is arranged inside the installation box, and the left and right end faces of the third spring are fixedly connected to the outer surface of the baffle on the adjacent side. The end faces of the two support members on the adjacent sides are provided with grooves, and the cross-section of the groove is stepped. The elastic force of the third spring is used to clamp the two support members to the electronic product.

[0010] A further improvement of the technical solution of the present invention is that: a second spring is sleeved on the outside of the first sliding rod, one end of the second spring is fixedly connected to the inner wall of the bracket, and the other end of the second spring is fixedly connected to the outer surface of the slider, the outer surface of the rotating plate is fixedly connected to the first spring, and the other end of the first spring is fixedly connected to the outer surface of the slider, and the elastic force of the first spring is used to pull the rotating plate so that the pressure plate clamps the electronic product.

[0011] A further improvement of the technical solution of the present invention is that: the outer surface of the slider is fixedly connected to a pressure plate, a U-shaped iron plate is sleeved on the outer side of the pressure plate, the front and rear end faces of the pressure plate are rotatably penetrated by a second rotating shaft through a second bearing, the front and rear end faces of the second rotating shaft are fixedly connected to the inner wall of the U-shaped iron plate, the outer surface of the U-shaped iron plate is clamped with the outer surface of the magnetic block, and by rotating the U-shaped iron plate, the magnetic block absorbs the U-shaped iron plate, and the outer surface of the magnetic block clamps the U-shaped iron plate, so that the position of the slider is fixed.

[0012] A further improvement of the technical solution of the present invention is that: the inner wall of the bottom end of the mounting plate is fixedly connected to a third rotating shaft, the bottom surface of the third rotating shaft is rotatably connected to the top surface of the moving block through the first bearing seat, the bottom surface of the mounting plate and the bottom surface of the mounting plate are both provided with mounting grooves, and the inner wall of the mounting groove is fixedly connected to a magnet, the bottom surface of the upper magnet and the top surface of the lower magnet attract each other, and the mounting plate can be rotated by removing the third rotating shaft, which facilitates the interchange of the positions of the support block and the clamping plate, and the upper and lower magnets are attracted to each other to fix the position of the mounting plate.

[0013] A further improvement of the technical solution of the present invention is that: a groove is provided on the inner wall of the base, and a through hole is provided on the front side of the base, and the through hole is connected with the inside of the groove, and the second filter screen is fixedly connected to the inner wall of the groove, and the first filter screen is fixedly connected to the inner wall of the through hole, driving the bottom surface of the second filter screen to rotate through the second bearing seat and connected to the first rotating shaft, and a fixed sleeve is provided on the outer surface of the first rotating shaft, and the right end face of the base is fixedly connected to the motor, and the outer surface of the motor output shaft rotates through the third bearing and passes through the right end face of the base and extends into the inside of the groove, and the outer surface of the motor output shaft and the outer surface of the first rotating shaft are fixedly provided with a bevel gear, and the outer surface of the bevel gear on the motor is meshed with the outer surface of the bevel gear on the side close to each other, and a sponge is provided inside the groove, and the motor is started to drive the first rotating shaft to rotate, and the first rotating shaft drives the blades to rotate, thereby dissipating heat for the electronic product machine, and utilizing the evaporation of water to accelerate the heat dissipation of electronic products.

[0014] Due to the adoption of the above technical solution, the present invention has the following technical advancements compared to the prior art: 1. The present invention provides a charging device for electronic products. The device comprises a double-ended screw, a second sliding rod, a movable block, a mounting plate, a first connecting rod, a support member, a third spring, a mounting box, and a second connecting rod. The double-ended screw is rotated to move the two movable blocks closer to each other, causing the two support members to limit the outer surfaces of the left and right ends of the electronic product. The elastic force of the third spring is used to clamp the two support members against the electronic product. 2. The present invention provides a charging device for electronic products. The device comprises a first spring, a rotating plate, a magnetic block, a U-shaped iron plate, a second rotating shaft, a pressure plate, a bracket, a first slide bar, a second spring, and a slider. The electronic product is placed between the upper and lower pressure plates. The pressure plate is pressed, and the pressure plate drives the slider to move. The slider drives the rotating plate and the clamping plate to move. The elastic force of the first spring is used to clamp the electronic product. The U-shaped iron plate is rotated, so that the magnetic block attracts the U-shaped iron plate, and the outer surface of the magnetic block is clamped to the U-shaped iron plate, thereby fixing the position of the slider. 3. The present invention provides a charging device for electronic products. By providing a magnet and a third rotating shaft, the mounting plate can be rotated by the third rotating shaft, thereby facilitating the interchange of the positions of the support block and the clamping plate. The upper and lower magnets attract each other to fix the position of the mounting plate. 4. The present invention provides a charging device for electronic products. By arranging a first filter, a motor, a sponge, blades, a second filter, a bevel gear and a first rotating shaft, a small amount of water is introduced into the groove, the motor is started, and the bevel gear is used to drive the first rotating shaft to rotate. The first rotating shaft drives the blades to rotate, so that the wind passes through the first filter and the second filter in sequence, so that the wind acts on the bottom surface of the electronic product, and the evaporation of the water is used to accelerate the heat dissipation of the electronic product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a sectional view of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 3 It is a partial cross-sectional view of the three-dimensional structure of the installation box of the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the adjustment part of the present invention; Figure 5 This is a cross-sectional view of the three-dimensional structure of the clamping portion of the present invention; Figure 6 for Figure 5 A magnified view of the structure at point B in the middle; Figure 7 for Figure 1 A magnified view of the structure in the middle.

[0016] In the figure: 1. first filter; 2. base; 3. motor; 4. clamping mechanism; 41. clamping part; 42. adjusting part; 411. first spring; 412. rotating plate; 413. magnetic block; 414. U-shaped iron plate; 415. second rotating shaft; 416. pressure plate; 417. bracket; 418. first slide bar; 419. second spring; 410. slider; 421. double-headed screw; 422. second slide bar; 423. moving block; 424. mounting plate; 425. first connecting rod; 426. support member; 427. third spring; 428. mounting box; 429. second connecting rod; 401. magnet; 402. third rotating shaft; 5. sponge; 6. blade; 7. second filter; 8. bevel gear; 9. first rotating shaft. DETAILED DESCRIPTION

[0017] The present invention is described in further detail below in conjunction with the embodiments: Example 1

[0018] like Figure 1-3 As shown, the present invention provides a charging device for electronic products, including a base 2, a clamping mechanism 4 is provided above the base 2, and the clamping mechanism 4 includes an adjusting portion 42; The adjusting portion 42 includes two mounting boxes 428, two mounting plates 424, a second slide bar 422 and two moving blocks 423. The left and right end surfaces of the second slide bar 422 are fixedly connected to the inner wall of the base 2. The moving block 423 is slidably sleeved on the outer surface of the second slide bar 422. The left end surface of the mounting box 428 is fixedly penetrated through the right end surface of the mounting plate 424 and extends to the left side of the mounting plate 424. The left and right end surfaces of the two moving blocks 423 are threadedly penetrated by stud screws 421. The outer surface of the left end of the stud screw 421 rotates through the inner wall of the base 2 through the first bearing and extends to the left side of the base 2. Two supporting members 426 are provided on the inner sides of the two mounting plates 424. Two baffles are provided on the inner wall of the mounting box 428. The outer surfaces of the two baffles are respectively fixedly connected with the first connecting rod 425 and the second connecting rod 425. The outer surface of the first connecting rod 425 and the outer surface of the second connecting rod 425 both slide through the inner wall of the installation box 428 and extend to the outside of the installation box 428. The outer surface of the first connecting rod 425 is fixedly connected to the outer surface of the support member 426, and the outer surface of the second connecting rod 425 is fixedly connected to the outer surface of the bracket 417. A third spring 427 is provided inside the installation box 428. The left and right end surfaces of the third spring 427 are fixedly connected to the outer surface of the baffle on the adjacent side. The end surfaces of the two support members 426 on the adjacent side are provided with a groove, and the cross-section of the groove is stepped. By arranging a double-headed screw 421, a second sliding rod 422, a moving block 423, a mounting plate 424, a first connecting rod 425, a support member 426, a third spring 427, a mounting box 428 and a second connecting rod 429, by rotating the double-headed screw 421, the two moving blocks 423 are brought closer to each other, so that the two support members 426 limit the outer surfaces of the left and right ends of the electronic product. The elastic force of the third spring 427 is used to clamp the two support members 426 against the electronic product. Example 2

[0019] like Figure 1-6 As shown, based on the first embodiment, two left-right symmetrical clamping parts 41 are provided above the base 2; The left clamping portion 41 includes a bracket 417, a rotating plate 412, a slider 410 and a first sliding rod 418. A through groove is provided on the outer surface of the bracket 417, and the inner wall of the through groove is fixedly connected to the outer surface of the first sliding rod 418. The slider 410 is slidingly sleeved with the first sliding rod 418. The left end surface of the slider 410 is hinged to the outer surface of the rotating plate 412. The end surface of the rotating plate 412 away from the slider 410 is hinged with a clamping plate. A second spring 419 is sleeved on the outer side of the first sliding rod 418. One end of the second spring 419 is fixedly connected to the inner wall of the bracket 417, and the other end of the second spring 419 is fixedly connected to the outer surface of the slider 410. The outer surface of the rotating plate 412 is fixedly connected to the first spring 411, and the other end of the first spring 411 is fixedly connected to the outer surface of the slider 410. The outer surface of the slider 410 is fixedly connected to the pressure plate 416. The outer side of the pressure plate 416 is provided with a U-shaped iron plate 414, and the front and rear end surfaces of the pressure plate 416 are rotated through the second bearing to be provided with a second rotating shaft 415, and the front and rear end surfaces of the second rotating shaft 415 are fixedly connected to the inner wall of the U-shaped iron plate 414, and the outer surface of the bracket 417 is fixedly connected to the magnetic block 413, and the outer surface of the U-shaped iron plate 414 is clamped with the outer surface of the magnetic block 413. By setting the first spring 411, the rotating plate 412, the magnetic block 413, the U-shaped iron plate 414, the second rotating shaft 415, the pressure plate 416, The bracket 417, the first slide bar 418, the second spring 419, and the slider 410 are used to place the electronic product between the upper and lower pressure plates 416. The pressure plate 416 is pressed, which drives the slider 410 to move. The slider 410 drives the rotating plate 412 and the clamping plate to move. The elastic force of the first spring 411 is used to clamp the electronic product. The U-shaped iron plate 414 is rotated so that the magnetic block 413 attracts the U-shaped iron plate 414. The outer surface of the magnetic block 413 is stuck to the U-shaped iron plate 414, so that the position of the slider 410 is fixed. The inner wall of the bottom end of the mounting plate 424 is fixedly connected to the third rotating shaft 402, and the bottom surface of the third rotating shaft 402 is rotatably connected to the top surface of the moving block 423 through the first bearing seat. The bottom surface of the mounting plate 424 and the bottom surface of the mounting plate 424 are both provided with mounting grooves, and the inner wall of the mounting groove is fixedly connected to the magnet 401. The bottom surface of the upper magnet 401 and the top surface of the lower magnet 401 attract each other. By arranging the magnet 401 and the third rotating shaft 402, the mounting plate 424 can be rotated by utilizing the third rotating shaft 402, which facilitates the interchange of the positions of the support block 426 and the splint, and the upper and lower magnets 401 attract each other to fix the position of the mounting plate 424. Example 3

[0020] like Figure 1-7 As shown, on the basis of the second embodiment, a groove is opened on the inner wall of the base 2, and a through hole is opened on the front of the base 2. The through hole is connected to the inside of the groove. The second filter screen 7 is fixedly connected to the inner wall of the groove, and the first filter screen 1 is fixedly connected to the inner wall of the through hole. The bottom surface of the second filter screen 7 is driven to rotate through the second bearing seat and is connected to the first rotating shaft 9. The outer surface of the first rotating shaft 9 is fixedly sleeved with a blade 6. The right end surface of the base 2 is fixedly connected to the motor 3. The outer surface of the output shaft of the motor 3 rotates through the right end surface of the base 2 through the third bearing and extends to the inside of the groove; The outer surface of the output shaft of the motor 3 and the outer surface of the first rotating shaft 9 are fixedly sleeved with a bevel gear 8. The outer surface of the bevel gear 8 on the motor 3 is meshed with the outer surface of the bevel gear 8 on the side close to each other. A sponge 5 is provided inside the groove. By arranging the first filter 1, the motor 3, the sponge 5, the blades 6, the second filter 7, the bevel gear 8 and the first rotating shaft 9, a small amount of water is introduced into the groove. The motor 3 is started and the bevel gear 8 is used to drive the first rotating shaft 9 to rotate. The first rotating shaft 9 drives the blades 6 to rotate, so that the wind passes through the first filter 1 and the second filter 7 in sequence, so that the wind acts on the bottom surface of the electronic product, and the evaporation of water is used to accelerate the heat dissipation of the electronic product. The following specifically describes the working principle of the charging device of this electronic product.

[0021] When charging a flat electronic product, the double-headed screw 421 is rotated to drive the two moving blocks 423 to move closer to each other. The two moving blocks 423 drive the mounting plates 424 and the support members 426 on the left and right sides to move closer to each other, so that the support members 426 clamp the electronic product. At this time, the third spring 427 is shortened; when charging a square electronic product such as a Bluetooth speaker or a camera, the mounting plate 424 is rotated to interchange the positions of the support member 426 and the bracket 417, and the upper and lower pressing plates 416 are controlled to move closer to each other. The two pressing plates 416 drive the two sliders 410, the two rotating plates 412 and the two clamping plates to move closer to each other, and the first spring 411 is used to release the first spring 411. The elastic force causes the clamping plate to clamp the electronic product, and the U-shaped iron plate 414 is rotated so that the outer surface of the U-shaped iron plate 414 is engaged with the outer surface of the magnetic block 413, and the motor 3 is started. The bevel gear 8 on the output shaft of the motor 3 drives the bevel gear 8 on the first rotating shaft 9 to rotate, so that the first rotating shaft 9 rotates, and the first rotating shaft 9 drives the blade 6 to rotate, so that the wind passes through the first filter 1 and the second filter 7 in sequence, so that the wind acts on the bottom surface of the electronic product; after the electronic product is charged and contacted, the U-shaped iron plate 414 is rotated so that the U-shaped iron plate 414 contacts the magnet, and the second spring 419 pushes the slider 410 to move, and the upper and lower sliders 410 drive the upper and lower rotating plates 412 and the upper and lower clamping plates to move away from each other.

[0022] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A charging device for an electronic product, comprising a base (2), characterized in that: A clamping mechanism (4) is provided above the base (2), and the clamping mechanism (4) includes an adjusting portion (42); The adjusting portion (42) includes two mounting boxes (428), two mounting plates (424), a second slide bar (422) and two moving blocks (423), the left and right end surfaces of the second slide bar (422) are fixedly connected to the inner wall of the base (2), the moving block (423) is slidably mounted on the outer surface of the second slide bar (422), and the left end surface of the mounting box (428) is fixedly passed through the right end surface of the mounting plate (424) and extends to the left side of the mounting plate (424); Two left-right symmetrical clamping parts (41) are provided above the base (2); The clamping portion (41) on the left side includes a bracket (417), a rotating plate (412), a slider (410) and a first slide bar (418). The outer surface of the bracket (417) is provided with a through groove, the inner wall of the through groove is fixedly connected to the outer surface of the first slide bar (418), the sliding sleeve of the slider (410) is provided with the first slide bar (418), the left end face of the slider (410) is hinged to the outer surface of the rotating plate (412), and the end face of the rotating plate (412) away from the slider (410) is hinged with a clamping plate.

2. The charging device for electronic products according to claim 1, characterized in that: The left and right end surfaces of the two moving blocks (423) are threadedly provided with double-headed screws (421), and the outer surface of the left end of the double-headed screw (421) rotates through the inner wall of the base (2) through the first bearing and extends to the left side of the base (2).

3. The charging device for electronic products according to claim 1, wherein: Two support members (426) are provided on the inner sides of the two mounting plates (424), and two baffles are provided on the inner wall of the mounting box (428). The outer surfaces of the two baffles are respectively fixedly connected to a first connecting rod (425) and a second connecting rod (425). The outer surfaces of the first connecting rod (425) and the second connecting rod (425) slide through the inner wall of the mounting box (428) and extend to the outside of the mounting box (428). The outer surface of the first connecting rod (425) is fixedly connected to the outer surface of the support member (426), and the outer surface of the second connecting rod (425) is fixedly connected to the outer surface of the bracket (417).

4. The charging device for electronic products according to claim 3, characterized in that: A third spring (427) is provided inside the installation box (428), and the left and right end surfaces of the third spring (427) are fixedly connected to the outer surface of the baffle on the adjacent side. The end surfaces of the two support members (426) on the adjacent sides are provided with grooves, and the cross section of the grooves is stepped.

5. The charging device for electronic products according to claim 1, characterized in that: A second spring (419) is sleeved on the outside of the first slide bar (418), one end of the second spring (419) is fixedly connected to the inner wall of the bracket (417), and the other end of the second spring (419) is fixedly connected to the outer surface of the slider (410). The outer surface of the rotating plate (412) is fixedly connected to the first spring (411), and the other end of the first spring (411) is fixedly connected to the outer surface of the slider (410).

6. The charging device for electronic products according to claim 1, characterized in that: The outer surface of the slider (410) is fixedly connected to a pressure plate (416), and a U-shaped iron plate (414) is sleeved on the outer side of the pressure plate (416). The front and rear end surfaces of the pressure plate (416) are rotatably penetrated by a second rotating shaft (415), and the front and rear end surfaces of the second rotating shaft (415) are fixedly connected to the inner wall of the U-shaped iron plate (414). The outer surface of the bracket (417) is fixedly connected to a magnetic block (413), and the outer surface of the U-shaped iron plate (414) is clamped to the outer surface of the magnetic block (413).

7. The charging device for electronic products according to claim 1, characterized in that: The inner wall of the bottom end of the mounting plate (424) is fixedly connected to a third rotating shaft (402), and the bottom surface of the third rotating shaft (402) is rotatably connected to the top surface of the moving block (423) through a first bearing seat. The bottom surface of the mounting plate (424) and the bottom surface of the mounting plate (424) are both provided with mounting grooves, and the inner wall of the mounting groove is fixedly connected to a magnet (401), and the bottom surface of the upper magnet (401) and the top surface of the lower magnet (401) attract each other.

8. The charging device for electronic products according to claim 1, characterized in that: The inner wall of the base (2) is provided with a groove, and the front of the base (2) is provided with a through hole, which is connected to the inside of the groove. The inner wall of the groove is fixedly connected to the second filter screen (7), and the inner wall of the through hole is fixedly connected to the first filter screen (1), driving the bottom surface of the second filter screen (7) to rotate through the second bearing seat and connected to the first rotating shaft (9). The outer surface of the first rotating shaft (9) is fixedly sleeved with a blade (6). The right end surface of the base (2) is fixedly connected to the motor (3). The outer surface of the output shaft of the motor (3) rotates through the right end surface of the base (2) through the third bearing and extends to the inside of the groove. The outer surface of the output shaft of the motor (3) and the outer surface of the first rotating shaft (9) are both fixedly sleeved with a bevel gear (8). The outer surface of the bevel gear (8) on the motor (3) is meshed with the outer surface of the bevel gear (8) on the side close to each other. A sponge (5) is provided inside the groove.

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