An electric toothbrush head using a spring

Abstract

The present invention relates to the field of machinery, and particularly to an electric toothbrush head. An electric toothbrush head using a spring includes a toothbrush head, which comprises a toothbrush handle, a front brush plate, a rear brush plate, and an upper brush plate. Through this design, the present invention provides an electric toothbrush head using a spring. By driving the three-sided bristles of the toothbrush head by a motor, the cleaning effect of teeth is improved; and through the surrounding effect generated by the three-sided bristles and the adaptive effect of the automatic fitting of the bristles with the change of the thickness from the incisors to the molars, the tooth cleaning needs of people with different oral cavities and tooth sizes are met. The design of the three-sided bristles solves the cleaning problem of the areas that are not easily brushed on the inner side of the teeth, avoids the generation of various bad brushing habits, and users no longer need to actively change the position of the toothbrush head to find the cleaning points. Only by pushing the toothbrush head can the whole brushing process be completed, simplifying the brushing process and improving the brushing efficiency.

Description

Technical Field

[0001] The present invention relates to the field of machinery, and specifically, to an electric toothbrush head. Background Art

[0002] The existing electric toothbrush heads have bristles only on one side. Since the upper and lower rows of teeth are convex, the upper and inner sides of the teeth are not easily cleaned effectively, and it is easy to form blind spots during brushing; when brushing teeth, it is necessary to clean the teeth by rubbing the tooth surface with the bristles. However, the existing electric toothbrushes can only drive the bristles on one side of the toothbrush head to vibrate or rotate by a motor, and the cleaning effect on the teeth is not good. It is necessary to change the direction of the toothbrush head multiple times to clean the outer, inner, and molar surfaces of the teeth, which is time-consuming and laborious, and is prone to forming bad brushing habits. Summary of the Invention

[0003] The purpose of the present invention is to provide an electric toothbrush head using a spring to solve at least one of the above technical problems.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An electric toothbrush head using a spring, including a toothbrush head, characterized in that the toothbrush head includes a toothbrush handle, a front brush plate, a rear brush plate, and an upper brush plate. Bristles are installed on the rear side of the front brush plate, bristles are provided on the front side of the rear brush plate, and bristles are provided on the lower side of the upper brush plate;

[0006] A first installation groove is provided at the front of the toothbrush handle. A first fixed shaft and a rotating member are provided in the first installation groove. A first rotating shaft hole for passing through the first fixed shaft is provided in the middle of the rotating member. An embedding groove is provided at the front of the rotating member. A block-shaped protrusion matching the embedding groove is provided on one side of the first fixed shaft. The width of the embedding groove gradually increases from bottom to top. A first notch is provided at the rear of the rotating member;

[0007] A first through hole is provided in the toothbrush handle, and the first through hole communicates with the first installation groove. A transmission rod for transmitting the power of the motor passes through the first through hole. The transmission rod is connected to a swinging member. The swinging member includes a block-shaped body. A first insertion hole for inserting the front part of the transmission rod is provided at the lower part of the block-shaped body. A first columnar protrusion for extending into the first notch is provided at the upper part of the block-shaped body;

[0008] A first fixing plate arranged longitudinally is provided below the front of the toothbrush handle. A first sliding groove is provided on the first fixing plate. The rear brush plate is fixed in the first sliding groove. A second through hole is provided at the upper part of the first fixing plate, and the second through hole communicates with the first sliding groove. A column is provided at the upper part of the rear brush plate. The column passes through the second through hole, and the upper part of the column abuts against the lower part of the rotating member;

[0009] A first strip-shaped opening arranged longitudinally is provided on the rear brush plate. A first spring is arranged in the first strip-shaped opening. A first sheet-shaped protrusion is provided on the first fixing plate. The first sheet-shaped protrusion extends into the first strip-shaped opening. The upper part of the first spring abuts against the inner wall of the first strip-shaped opening, and the lower part of the first spring abuts against the first sheet-shaped protrusion;

[0010] A second fixing plate arranged transversely is provided above the rear brush plate. The second fixing plate is arranged on the front side of the brush head handle. A second installation groove is provided on the second fixing plate. The upper brush plate is installed in the second installation groove. A cover plate is provided above the second fixing plate;

[0011] The cover plate is connected to the front brush plate. A second notch is provided at the rear of the cover plate. A second sheet-shaped protrusion for abutting against the second notch is provided at the front of the brush head handle;

[0012] A second spring is arranged in the second installation groove. One side part of the second spring is fixed to the rear part of the second fixing plate, and the other side part of the second spring is fixed to the front part of the cover plate.

[0013] A third sheet-shaped protrusion extending upward is provided on the cover plate near the second notch. The sum of the height of the third sheet-shaped protrusion and the thickness of the cover plate is not less than the sum of the thickness of the second sheet-shaped protrusion and the depth of the embedding groove.

[0014] A pin is arranged in the first strip-shaped opening. The first spring is sleeved outside the pin. Second installation holes for inserting the pin are provided on both the inner wall of the first strip-shaped opening and the first sheet-shaped protrusion.

[0015] A vertical rod is provided on both sides of the first notch. The vertical rod is cylindrical. A third strip-shaped opening with an arc-shaped cross-section is provided at the front of the brush head handle. The upper part of the vertical rod extends into the third strip-shaped opening.

[0016] As a solution, the upper part of the second fixing plate is connected to the upper part of the rear brush plate. A card slot is provided on the upper brush plate. The card slot communicates with the second installation groove. A first spring clip for fixedly connecting the second spring is arranged in the card slot. The first spring clip is sheet-shaped, and the middle part of the first spring clip is clamped into the spring coil of the second spring.

[0017] As another solution, the rear portion of the second fixing plate is connected to the upper portion of the first fixing plate, a second strip-shaped opening is provided between the first fixing plate and the second fixing plate, a connecting plate is provided on the upper portion of the rear brush plate, the upper portion of the connecting plate passes through the second strip-shaped opening, and a third strip-shaped opening is provided on the connecting plate;

[0018] A rotating shaft is provided in the second mounting groove, and a first mounting hole for inserting the rotating shaft is provided on both side walls of the second mounting groove. A second columnar protrusion is provided on one side of the rotating shaft near the connecting plate, and one side of the second columnar protrusion extends into the third strip-shaped opening. A fixing ring is provided on the upper part of the upper brush plate, and the rotating shaft passes through the fixing ring.

[0019] The upper brush plate is provided with a connecting rod, the connecting rod is connected to the front brush plate, the front side of the cover plate is provided with a third fixing plate, the upper part of the third fixing plate is connected to the front part of the cover plate, and the third fixing plate is provided with a second sliding groove for installing the front brush plate.

[0020] The front brush plate is provided with a penetration hole for inserting the connecting rod. Preferably, one side of the connecting rod is arranged on the left side of the front portion of the upper brush plate, and the other side of the connecting rod is inserted into the penetration hole, and the penetration hole is arranged on the right side of the upper portion of the front brush plate.

[0021] The upper brush plate is provided with a second spring clip for fixedly connecting the second spring. There are two second springs, one on each side of the rotating shaft. The upper brush plate is provided with a clipping slot. The second spring clip comprises an annular body that is sleeved onto the outer side of the rotating shaft. The lower portion of the annular body clips into the clipping slot. Both sides of the annular body are provided with a fourth plate-shaped protrusion for inserting the second spring.

[0022] When in use, the front of the toothbrush is placed in the oral cavity, and the user pushes the brush head handle in the direction of brushing the teeth. The brush head handle rotates around the first fixed axis, and the second sheet-shaped protrusion arranged on the front side of the brush head handle pushes and opens the cover plate from the second notch, thereby increasing the distance between the front brush plate and the rear brush plate to adapt to the corners of the teeth. The brush head handle is continued to be pushed, so that the distance between the front brush plate and the rear brush plate changes with the thickness of the teeth, and adapts to the thickness change between the incisors and molars. Then, the front brush plate and the rear brush plate are tightened by the second spring to fit the teeth, thereby achieving the adaptive effects of brush head expansion, tight fit and free angle change.

[0023] Among them, the transmission rod inside the brush head handle transmits the power output by the motor in the electric toothbrush to the swing piece. The transmission rod rotates with the rotating shaft of the motor and continuously changes its rotation direction. The transmission rod drives the swing piece to move. The columnar protrusion on the swing piece pushes the rotating piece from the first notch, causing the rotating piece to rotate around the first fixed shaft and continuously change its rotation direction. The block-shaped protrusion in the installation groove on the brush head handle is arranged in the embedding groove of the rotating piece. As the rotating piece rotates, the block-shaped protrusion moves along the side wall of the embedding groove, and thus the rotating piece undergoes up and down displacements. When the rotating piece moves downward, it pushes the rear brush plate to slide in the first sliding groove through the upright column. When the rear brush plate slides downward, it compresses the first spring in the first strip-shaped opening. The first spring can push the rear brush plate to slide upward for reset when the rotating piece moves upward. The rear brush plate drives the upper brush plate to move, and the upper brush plate drives the front brush plate to move, realizing the movement of the three-sided bristles of the brush head driven by the motor, and improving the cleaning effect of teeth.

[0024] Through this design, the present invention provides an electric toothbrush head using a spring, which drives the movement of the three-sided bristles of the brush head through a motor, improving the cleaning effect of teeth; and meets the tooth cleaning needs of people with different oral cavities and tooth sizes through the surrounding effect generated by the three-sided bristles and the adaptive effect of automatic fitting of the bristles with the change in thickness from the front teeth to the molars. The design of the three-sided bristles solves the cleaning problem of the areas that are not easy to brush on the inner side of the teeth, avoids the generation of various bad brushing habits, and users no longer need to actively change the position of the brush head to find the cleaning points. They only need to push the brush head to complete the whole brushing process, simplifying the brushing process and improving the brushing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a partial structural schematic diagram of the present invention;

[0026] Figure 2 is a partial structural bottom view of the present invention;

[0027] Figure 3 is a partial structural exploded view of the present invention;

[0028] Figure 4 is a partial structural schematic diagram of the rotating piece of the present invention;

[0029] Figure 5 is a partial structural schematic diagram of the brush head handle of the present invention;

[0030] Figure 6 is a partial structural schematic diagram of the swing piece of the present invention;

[0031] Figure 7 is a partial structural schematic diagram of the first fixing plate of the present invention;

[0032] Figure 8 is a partial structural schematic diagram of the rear brush plate of the present invention;

[0033] Figure 9 Partial structural schematic diagram at the rotating shaft of the present invention;

[0034] Figure 10 Partial structural schematic diagram at the upper brush plate of the present invention;

[0035] Figure 11 Partial structural schematic diagram at the cover plate of the present invention;

[0036] Figure 12 Partial structural schematic diagram of the present invention with the upper brush plate moving up and down;

[0037] Figure 13 Exploded partial structural schematic diagram of the present invention with the upper brush plate moving up and down. Detailed implementation manners

[0038] The following further explains the detailed implementation manners of the present invention with reference to the accompanying drawings.

[0039] Such as Figures 1 to 13As shown in the figure, an electric toothbrush head using a spring includes a toothbrush head, which includes a toothbrush handle 1, a front brush plate 10, a rear brush plate 3, and an upper brush plate 9. Brush bristles are installed on the rear side of the front brush plate, on the front side of the rear brush plate, and on the lower side of the upper brush plate. At the front part of the toothbrush handle, there is a first installation groove 25. Inside the first installation groove, there are a first fixed shaft 19 and a rotating member 20. In the middle of the rotating member, there is a first rotating shaft hole 21 for passing through the first fixed shaft. At the front part of the rotating member, there is an embedding groove 22. On one side of the first fixed shaft, there is a block-shaped protrusion 26 that matches the embedding groove. The width of the embedding groove gradually increases from bottom to top. At the rear part of the rotating member, there is a first notch 23. Inside the toothbrush handle, there is a first through hole 11, which communicates with the first installation groove. A transmission rod for transmitting the power of the motor passes through the first through hole. The transmission rod is connected to a swinging member 8. The swinging member includes a block-shaped body. At the lower part of the block-shaped body, there is a first insertion hole 28 for inserting the front part of the transmission rod. At the upper part of the block-shaped body, there is a first columnar protrusion 29 for extending into the first notch. Below the front part of the toothbrush handle, there is a first fixing plate 2 arranged longitudinally. The first fixing plate is provided with a first sliding groove, and the rear brush plate is fixed in the first sliding groove. At the upper part of the first fixing plate, there is a second through hole 35, which communicates with the first sliding groove. At the upper part of the rear brush plate, there is a column 39, which passes through the second through hole, and the upper part of the column abuts against the lower part of the rotating member. On the rear brush plate, there is a first strip-shaped opening 36 arranged longitudinally. Inside the first strip-shaped opening, there is a first spring 16. On the first fixing plate, there is a first sheet-shaped protrusion 30, which extends into the first strip-shaped opening. The upper part of the first spring abuts against the inner wall of the first strip-shaped opening, and the lower part of the first spring abuts against the first sheet-shaped protrusion. Above the rear brush plate, there is a second fixing plate 32 arranged horizontally. The second fixing plate is arranged on the front side of the toothbrush handle. The second fixing plate is provided with a second installation groove 33, and the upper brush plate is installed in the second installation groove. Above the second fixing plate, there is a cover plate 4. The cover plate is connected to the front brush plate. At the rear part of the cover plate, there is a second notch 45. At the front part of the toothbrush handle, there is a second sheet-shaped protrusion 27 for abutting against the second notch. Inside the second installation groove, there is a second spring 17. One side of the second spring is fixed to the rear part of the second fixing plate, and the other side of the second spring is fixed to the front part of the cover plate. Through this design, the present invention provides an electric toothbrush head using a spring, which drives the movement of the three-sided brush bristles of the toothbrush head by a motor, improving the cleaning effect of teeth; and through the surrounding effect generated by the three-sided brush bristles and the adaptive effect of automatic fitting of the brush bristles with the change of the thickness from the front teeth to the molars, it meets the tooth cleaning needs of people with different oral cavities and tooth sizes. The design of the three-sided brush bristles solves the cleaning problem of the areas that are not easy to reach on the inner side of the teeth, avoids the generation of various bad brushing habits, and users no longer need to actively change the position of the toothbrush head to find the cleaning points. They only need to push the toothbrush head to complete the whole brushing process, simplifying the brushing process and improving the brushing efficiency.

[0040] When in use, the front of the toothbrush is placed in the oral cavity, and the user pushes the brush head handle in the direction of brushing teeth. The brush head handle rotates around the first fixed axis, and the second sheet-shaped protrusion arranged on the front side of the brush head handle pushes and stretches the cover plate from the second notch, thereby increasing the distance between the front brush plate and the rear brush plate to adapt to the corners of the teeth. The brush head handle is continued to be pushed so that the distance between the front brush plate and the rear brush plate changes with the thickness of the teeth, and adapts to the thickness change between the incisors and molars. The front brush plate and the rear brush plate are then tightened by the second spring to fit the teeth, thereby achieving the adaptive effect of brush head expansion, adhesion and free angle change; wherein, the transmission rod in the brush head handle transmits the power output by the motor in the electric toothbrush to the oscillating part, and the motor can be set to an operating mode of alternating clockwise and counterclockwise rotation, and the clockwise and counterclockwise rotation of the motor shaft can be set The rotation angle makes the transmission rod rotate with the rotating shaft of the motor and continuously change the direction, and the transmission rod drives the swinging member to move. The columnar protrusion on the swinging member pushes the rotating member from the first notch, so that the rotating member rotates around the first fixed axis and continuously changes the direction. The block protrusion in the mounting groove on the brush head handle is set in the embedding groove of the rotating member. As the rotating member rotates, the block protrusion moves along the side wall of the embedding groove, and then the rotating member moves up and down. When the rotating member moves downward, it pushes the rear brush plate to slide in the first slide groove through the column. When the rear brush plate slides downward, it compresses the first spring in the first strip opening. When the rotating member moves upward, the first spring can push the rear brush plate to slide upward for reset. The rear brush plate drives the upper brush plate to move, and the upper brush plate drives the front brush plate to move, realizing the three-sided brushing movement of the brush head driven by the motor, thereby improving the cleaning effect of the teeth.

[0041] To ensure effective use of the brush head, the upper portion of the first fixing plate is provided with a second rotation axis hole for inserting the first fixed shaft. There are two second through holes, each of which passes through the pillar, and are located on either side of the second rotation axis hole. The third strip-shaped openings are arranged horizontally.

[0042] A third, upwardly extending tab-shaped protrusion 5 is provided on the cover plate near the second notch. The sum of the height of the third tab-shaped protrusion and the thickness of the cover plate is no less than the sum of the thickness of the second tab-shaped protrusion and the depth of the embedding groove. This ensures that the second tab-shaped protrusion on the front of the brush head handle pushes and opens the cover plate.

[0043] A pin 15 is provided within the first strip-shaped opening, and the first spring is sleeved on the outside of the pin. A second mounting hole for inserting the pin is provided on the inner wall of the first strip-shaped opening and on the first plate-shaped protrusion. The pin secures the first spring within the first strip-shaped opening, ensuring the device's effectiveness.

[0044] A third fixing plate 44 is provided on the front side of the cover plate. The upper portion of the third fixing plate is connected to the front portion of the cover plate. A second chute for mounting the front brush plate is provided on the third fixing plate. The connecting rod, through its insertion hole, presses down or lifts the front brush plate, causing it to move up and down within the second chute.

[0045] A cylindrical upright 24 is provided on either side of the first notch. A third strip-shaped opening 7 with an arc-shaped cross section is provided at the front of the brush handle, into which the upper portion of the upright extends. This design positions the cylindrical protrusion on the swinging member between the uprights on either side of the first notch, allowing the cylindrical protrusion on the swinging member to push the rotating member through the first notch. Simultaneously, the upper portion of the upright protrusion extends into the strip-shaped opening, thereby limiting the rotational range of the rotating member and ensuring the toothbrush's cleaning effect.

[0046] To facilitate the transmission of motor power by the transmission rod, a plug is provided at the front of the transmission rod for insertion into a first insertion hole. The plug's height is greater than its width. The transmission rod includes a first transmission rod 12 and a second transmission rod 13. The first transmission rod is connected to the second transmission rod. The rear portion of the first transmission rod is provided with a second insertion hole for inserting the motor shaft. The front portion of the first transmission rod has a semicircular cross-section. The rear portion of the second transmission rod is provided with a third insertion hole that matches the shape of the front portion of the first transmission rod. The plug is provided at the front portion of the second transmission rod.

[0047] The block-shaped protrusion and the brush handle are integrated. The upright post and rear brush plate are also integrated. The first sheet-shaped protrusion and the first fixing plate are also integrated. This ensures the structural strength and performance of the brush head.

[0048] In order to improve the cleaning effect, the bristles on the lower surface of the upper brush plate are arranged vertically, the bristles on the rear side of the front brush plate are arranged obliquely, and the bristles on the front side of the rear brush plate are arranged obliquely.

[0049] As a solution, refer to Figures 12 to 13 The upper part of the second fixed plate is connected to the upper part of the rear brush plate. Then the rear brush plate continuously moves up and down and drives the second fixed plate to move. The second fixed plate drives the cover plate and the upper brush plate to continuously move up and down. The cover plate drives the front brush plate to continuously move up and down. A card slot 46 is provided on the upper brush plate. The card slot is connected to the second mounting slot. A first spring clip 47 for fixing the second spring is provided in the card slot. The first spring clip is sheet-shaped, and the middle part of the first spring clip is inserted into the spring coil of the second spring. The middle part of the second spring is fixed to the middle part of the upper brush plate by the first spring clip. The upper brush plate is pulled by the second spring in both the front and rear directions. Then, when the second sheet-shaped protrusion on the front side of the brush head handle pushes and opens the cover plate, the upper brush plate is always close to the middle position between the front and rear brush plates, which can achieve a better cleaning effect on the upper surface of the user's molars.

[0050] As another solution, refer to Figures 1 to 11The rear part of the second fixing plate is connected to the upper part of the first fixing plate, and a second strip opening 34 is provided between the first fixing plate and the second fixing plate. A connecting plate 38 is provided on the upper part of the rear brush plate, and the upper part of the connecting plate passes through the second strip opening, and a third strip opening 37 is provided on the connecting plate; a rotating shaft 14 is provided in the second mounting groove, and both side walls of the second mounting groove are provided with a first mounting hole 31 for inserting the rotating shaft, and a second columnar protrusion 40 is provided on one side of the rotating shaft near the connecting plate, and one side of the second columnar protrusion extends into the third strip opening, and a fixing ring 43 is provided on the upper part of the upper brush plate, and the rotating shaft passes through the fixing ring; a connecting rod 41 is provided on the upper brush plate, which is connected to the front brush plate, and a third fixing plate is provided on the front side of the cover plate. The upper part of the third fixing plate is connected to the front of the cover plate, and the third fixing plate is provided with a second slide groove for installing the front brush plate. Because the second columnar protrusion on one side of the rotating shaft extends into the third strip-shaped opening on the connecting plate, the connecting plate drives the rotating shaft to rotate as the rear brush plate moves up and down. The rotating shaft drives the upper brush plate to move through the fixed ring, and then the upper brush plate can deflect left and right around the rotating shaft. The upper brush plate drives the front brush plate to move through the connecting rod. The front brush plate is provided with an insertion hole for inserting the connecting rod. Preferably, one side of the connecting rod is provided on the left side of the front part of the upper brush plate, and the other side of the connecting rod is inserted into the insertion hole, and the insertion hole is provided on the right side of the upper part of the front brush plate. When the upper brush plate deflects left and right, it drives the connecting rod provided on one side of the upper brush plate to move up and down, and then the connecting rod has the effect of pressing down or lifting up the front brush plate from the insertion hole, thereby driving the movement of the front brush plate. To ensure the shaft drives the upper brush plate leftward and rightward, the shaft's front and rear cross-sections are circular, while its middle cross-section is rectangular. A third through-hole, also rectangular in cross-section, is located in the center of the retaining ring, through which the shaft's middle section passes. For ease of installation, the shaft passes through the third through-hole, with the diameter of the shaft's front no greater than the height of its middle section. To ensure the swing lever drives the shaft's rotation, the second cylindrical projection is circular in cross-section, with the shaft's diameter larger than the second cylindrical projection, and the shaft's centerline is parallel to the second cylindrical projection's centerline. The upper brush plate is provided with a second spring clip 18 for securing the second spring. Two second springs are provided, one on each side of the shaft. A retaining slot 42 is located in the upper brush plate. The second spring clip comprises an annular body that fits over the shaft's exterior, with its lower portion snapping into the retaining slot. A fourth tab is located on each side of the annular body, which receives the second spring. The middle part of the second spring is fixedly connected to the upper brush plate through the second spring clip, and the upper brush plate is subjected to the tension of the spring in the front and rear directions. Then, when the second sheet-shaped protrusion on the front side of the brush head handle pushes and opens the cover plate, the position of the upper brush plate is relatively fixed and can be close to the middle position between the front brush plate and the rear brush plate, which can have a better cleaning effect on the upper surface of the user's molars.

[0051] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. After those skilled in the art have read the above content, various modifications and alternatives to the present invention will be obvious. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims

1. An electric toothbrush head using a spring, comprising a toothbrush head, characterized in that, The brush head includes a brush head handle, a front brush plate, a rear brush plate, and an upper brush plate. Brush hairs are installed on the rear side surface of the front brush plate, on the front side surface of the rear brush plate, and on the lower side surface of the upper brush plate; A first installation groove is provided at the front part of the brush head handle. A first fixed shaft and a rotating member are provided in the first installation groove. A first rotating shaft hole for passing through the first fixed shaft is provided in the middle of the rotating member. An embedding groove is provided at the front part of the rotating member. A block-shaped protrusion matching the embedding groove is provided on one side of the first fixed shaft. The width of the embedding groove gradually increases from bottom to top. A first notch is provided at the rear part of the rotating member; A first through hole is provided in the brush head handle. The first through hole communicates with the first installation groove. A transmission rod for transmitting the power of the motor passes through the first through hole. The transmission rod is connected to a swinging member. The swinging member includes a block-shaped body. A first insertion hole for inserting the front part of the transmission rod is provided at the lower part of the block-shaped body. A first columnar protrusion for extending into the first notch is provided at the upper part of the block-shaped body; A first fixing plate arranged longitudinally is provided below the front part of the brush head handle. A first sliding groove is provided on the first fixing plate. The rear brush plate is fixed in the first sliding groove. A second through hole is provided at the upper part of the first fixing plate. The second through hole communicates with the first sliding groove. A column is provided at the upper part of the rear brush plate. The column passes through the second through hole. The upper part of the column abuts against the lower part of the rotating member; A first strip-shaped opening arranged longitudinally is provided on the rear brush plate. A first spring is provided in the first strip-shaped opening. A first sheet-shaped protrusion is provided on the first fixing plate. The first sheet-shaped protrusion extends into the first strip-shaped opening. The upper part of the first spring abuts against the inner wall of the first strip-shaped opening. The lower part of the first spring abuts against the first sheet-shaped protrusion; A second fixing plate arranged transversely is provided above the rear brush plate. The second fixing plate is arranged on the front side of the brush head handle. A second installation groove is provided on the second fixing plate. The upper brush plate is installed in the second installation groove. A cover plate is provided above the second fixing plate; The cover plate is connected to the front brush plate. A second notch is provided at the rear part of the cover plate. A second sheet-shaped protrusion for abutting against the second notch is provided at the front part of the brush head handle; A second spring is provided in the second installation groove. One side part of the second spring is fixed to the rear part of the second fixing plate. The other side part of the second spring is fixed to the front part of the cover plate. The upper part of the second fixing plate is connected to the upper part of the rear brush plate. A card slot is provided on the upper brush plate. The card slot communicates with the second installation groove. A first spring clip for fixedly connecting the second spring is provided in the card slot. The rear part of the second fixing plate is connected to the upper part of the first fixing plate. A second strip-shaped opening is provided between the first fixing plate and the second fixing plate. A connecting plate is provided at the upper part of the rear brush plate. The upper part of the connecting plate passes through the second strip-shaped opening. A third strip-shaped opening is provided on the connecting plate; A rotating shaft is provided in the second installation groove. First installation holes for inserting the rotating shaft are provided on both side walls of the second installation groove. A second columnar protrusion is provided on one side of the rotating shaft near the connecting plate. One side of the second columnar protrusion extends into the third strip-shaped opening. A fixing ring is provided on the upper part of the upper brush plate, and the rotating shaft passes through the fixing ring. A connecting rod is provided on the upper brush plate. The connecting rod connects the front brush plate. A third fixing plate is provided on the front side of the cover plate. The upper part of the third fixing plate is connected to the front part of the cover plate. A second sliding groove for installing the front brush plate is provided on the third fixing plate. A penetration hole for penetrating the connecting rod is provided on the front brush plate. One side of the connecting rod is arranged on the left side of the front part of the upper brush plate, and the other side of the connecting rod penetrates into the penetration hole. The penetration hole is arranged on the right side of the upper part of the front brush plate.

2. The electric toothbrush head using a spring according to claim 1, wherein A second spring clip for fixedly connecting the second spring is provided on the upper brush plate.

3. The electric toothbrush head using a spring according to claim 2, characterized in that, There are two second springs, and the two second springs are respectively arranged on both sides of the rotating shaft. A clamping groove is provided on the upper brush plate. The second spring clip includes an annular body. The annular body is sleeved on the outer side of the rotating shaft. The lower part of the annular body is clamped into the clamping groove. Fourth sheet-shaped protrusions for extending into the second spring are provided on both sides of the annular body.

4. The electric toothbrush head using a spring according to claim 1, characterized in that, A third sheet-shaped protrusion extending upward is provided on the cover plate near the second notch. The sum of the height of the third sheet-shaped protrusion and the thickness of the cover plate is not less than the sum of the thickness of the second sheet-shaped protrusion and the depth of the embedding groove.

5. The electric toothbrush head using a spring according to claim 1, characterized in that, A pin is provided in the first strip-shaped opening. The first spring is sleeved on the outer side of the pin. Second installation holes for inserting the pin are provided on the inner wall of the first strip-shaped opening and on the first sheet-shaped protrusion.

6. The electric toothbrush head using a spring according to claim 1, wherein Vertical rods are provided on both sides of the first notch. The vertical rods are cylindrical. A third strip-shaped opening with an arc-shaped cross section is provided on the front part of the brush head handle. The upper parts of the vertical rods extend into the third strip-shaped opening.

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