A wrap-around toothbrush capable of maintaining upper bristle position

Abstract

The present invention relates to the field of machinery, and in particular to a toothbrush. A wraparound toothbrush capable of maintaining the position of upper bristles comprises an electric toothbrush, the electric toothbrush comprising a brush head, the brush head comprising a brush head handle, the front portion of the brush head handle being provided with an upper brush plate, a front brush plate, and a rear brush plate; the upper brush plate and the front brush plate are connected via a transmission mechanism, the transmission mechanism comprising an elastic connector for resetting the front brush plate, the elastic connector being arranged between the front brush plate and the rear brush plate. Through this design, the present invention provides a wraparound toothbrush capable of maintaining the position of upper bristles, and the teeth cleaning needs of people with different oral cavity and tooth sizes are met through the wraparound effect produced by the bristles on three sides and the adaptive effect of the bristles automatically fitting as the thickness changes from the incisors to the molars; at the same time, the bristles below the upper brush plate are maintained in a relatively middle position on the upper part of the teeth, which is beneficial to the cleaning of the upper surface of the teeth and improves the cleaning effect.

Description

Technical Field

[0001] The present invention relates to the field of machinery, in particular to a toothbrush. Background Art

[0002] The brush head of an existing electric toothbrush has bristles on only one side. Since the upper and lower teeth are convex, it is difficult to effectively clean the upper and inner sides of the teeth, which easily forms a blind spot when brushing teeth. When brushing teeth, it is necessary to change the direction of the brush head many times to clean the outer and inner sides of the teeth and the surface of the molars, which is time-consuming and laborious, and easily forms a bad brushing habit. Alternatively, there are some existing wrap-around toothbrushes with bristles on three sides. When brushing teeth, the bristles of the toothbrush wrap around the teeth in a wrap-around manner. However, since the bristles on the three sides are relatively fixed, they cannot adapt to the thickness change between the incisors and molars, resulting in inconvenience in use and cannot adapt to most people. In particular, for the molars on the inner side of the oral cavity, the bristles on the upper side of the toothbrush do not change their position as the thickness change between the incisors and molars, which is not conducive to cleaning the upper surface of the teeth, especially for the grooves in the middle part of the upper surface of the molars, the cleaning effect is not good. Summary of the invention

[0003] The object of the present invention is to provide a wrap-around toothbrush capable of maintaining the position of upper bristles, so as to solve at least one of the above-mentioned technical problems.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A wrap-around toothbrush capable of maintaining the position of upper bristles, comprising an electric toothbrush, the electric toothbrush comprising a brush head, characterized in that the brush head comprises a brush head handle, the front portion of the brush head handle is provided with an upper brush plate, a front brush plate, and a rear brush plate, bristles are arranged on the lower surface of the upper brush plate, bristles are arranged on the rear side surface of the front brush plate, and bristles are arranged on the front side surface of the rear brush plate;

[0006] A first rotating shaft is provided on the upper part of the rear brush plate, a first rotating shaft hole is provided on the front part of the brush head handle, and the first rotating shaft penetrates into the first rotating shaft hole;

[0007] The upper brush plate is connected to the front brush plate via a transmission mechanism, and the transmission mechanism includes an elastic connector for resetting the front brush plate, and the elastic connector is arranged between the front brush plate and the rear brush plate.

[0008] As a solution, a first fixing plate is provided at the front of the rear brush plate, a first sliding groove is provided on the first fixing plate, and the upper brush plate is arranged in the first sliding groove;

[0009] A first mounting plate is provided at the rear of the front brush plate, two mounting strips are provided at the lower part of the first mounting plate, the two mounting strips are respectively arranged on two sides of the first mounting plate, a second slide groove is provided on the mounting strip, and the outer side of the first fixing plate is arranged in the second slide groove;

[0010] A second rotating shaft is provided on one side of the first fixing plate, the transmission mechanism comprises a connecting rod, a second rotating shaft hole is provided on one side of the connecting rod, the second rotating shaft penetrates into the second rotating shaft hole, a strip opening is provided on the other side of the connecting rod, a column is provided on the upper surface of the upper brush plate, and the column penetrates into the strip opening;

[0011] The transmission mechanism includes a pin, a mounting hole is provided on the first mounting plate, the upper portion of the pin is inserted into the mounting hole, the lower portion of the pin is inserted into the strip-shaped opening, and the column is located between the pin and the second rotating shaft;

[0012] The elastic connecting member adopts a first torsion spring, and a fixed shaft is provided on one side of the first fixed plate close to the second rotating shaft. A block-shaped protrusion is provided at the front of the first fixed plate. The middle part of the first torsion spring is sleeved on the fixed shaft, one side of the first torsion spring abuts against the block-shaped protrusion, and the other side of the first torsion spring abuts against the connecting rod.

[0013] The second rotating shaft and the pin are respectively arranged on two sides of the connecting rod, and the column is located in the middle of the connecting rod.

[0014] The first mounting plate and the mounting bar adopt an integrated structure. A notch is provided on the mounting bar away from the second rotation axis to facilitate the movement of the connecting rod.

[0015] A protrusion is provided on one side surface of the connecting rod close to the first torsion spring, and the cross section of the protrusion is semicircular. One side surface of the block-shaped protrusion close to the first torsion spring is inclined.

[0016] The width of the upper brush plate gradually decreases from top to bottom; the width of the first fixing plate gradually decreases from top to bottom.

[0017] The first rotating shaft is in the shape of an inverted truncated cone. The front part of the brush head handle is provided with a mounting groove, the width of the rear part of the mounting groove is greater than the width of the upper part of the rotating shaft, the width of the front part of the mounting groove gradually decreases from top to bottom, and the front part of the mounting groove is connected to the first rotating shaft hole; the front part of the brush head handle is provided with an embedded block for being inserted into the mounting groove, the front part of the embedded block is provided with a contact surface for resisting the first rotating shaft, and the contact surface is an arc surface. The brush head handle is provided with an insertion hole, and the rear part of the embedded block is provided with a plug for being inserted into the insertion hole.

[0018] The bristles arranged on the lower surface of the upper brush plate are arranged vertically, the bristles arranged on the rear side of the front brush plate are arranged obliquely, and the bristles arranged on the front side of the rear brush plate are arranged obliquely.

[0019] A first groove is provided at the rear of the first mounting plate, the width of the first groove gradually increases from front to back, and the front of the brush head handle is arranged in the first groove.

[0020] As another solution, a second mounting plate is provided at the rear of the front brush plate, a second fixing plate is provided at the front of the rear brush plate, the second fixing plate is arranged below the second mounting plate, and the upper brush plate is arranged below the second fixing plate;

[0021] The second fixing plate is provided with a first fixing column, a second fixing column, a third fixing column, and a fourth fixing column in sequence from front to back;

[0022] The cross section of the first fixing column is circular, a first gear is mounted on the first fixing column, a second gear is disposed below the first gear, and the first gear and the second gear are in an integrated structure;

[0023] The cross section of the second fixing column is circular, a third gear is mounted on the second fixing column, and the second gear is meshedly connected with the third gear;

[0024] A first rack is provided on one side of the lower part of the second mounting plate, the first rack is meshed and connected to the first gear, and a second rack is provided on one side of the upper part of the upper brush plate, the second rack is meshed and connected to the third gear;

[0025] The elastic connecting member adopts a second torsion spring, a fifth fixing column is provided at the lower part of the second mounting plate, the middle part of the second torsion spring is sleeved on the third fixing column, one side of the second torsion spring abuts against the fourth fixing column, and the other side of the second torsion spring abuts against the fifth fixing column.

[0026] The forward movement distance of the second rack is half of the forward movement distance of the first rack.

[0027] The second mounting plate and the first rack are of an integrated structure, and the upper brush plate and the second rack are of an integrated structure.

[0028] A second groove is provided at the rear of the second mounting plate, the width of the second groove gradually increases from front to back, and the front of the brush head handle is arranged in the second groove.

[0029] When brushing teeth, put the front side of the toothbrush into the oral cavity, the front part of the brush head handle is rotatably connected to the first rotating shaft, the user pushes the brush head handle along the brushing direction, the brush head handle rotates, and the front part of the brush head handle pushes the side wall of the groove on the first mounting plate at the rear of the front brush plate, thereby moving the front brush plate forward, so that the front brush plate and the rear brush plate expand to both sides as the thickness of the teeth changes, and adapt to the thickness change between the incisors and molars. At the same time, the front brush plate is pulled back and reset by the elastic connecting member, and the bristles are tightened and fit the teeth. Then, through the cooperation and action of the above components, the adaptive effect of brush head expansion, tightness and free angle change is achieved; in this design, the upper brush plate and the front brush plate are linked by a transmission mechanism. When the front brush plate moves forward, the transmission mechanism drives the upper brush plate to move forward as well, thereby making the bristles under the upper brush plate located in the middle of the upper part of the teeth, which is beneficial to cleaning the upper surface of the teeth, and is more suitable for cleaning the grooves in the middle of the upper surface of the molars.

[0030] Through this design, the present invention provides a wrap-around toothbrush that can maintain the position of the upper bristles. The wrap-around effect produced by the bristles on three sides and the adaptive effect of the bristles automatically fitting as the thickness changes from the incisors to the molars meet the teeth cleaning needs of people with different oral cavity and tooth sizes. The design of the three-sided bristles solves the problem of cleaning the areas on the inside of the teeth that are not suitable for brushing, and avoids the occurrence of various bad brushing habits. The user no longer needs to actively change the position of the brush head to find a cleaning point, and can complete the entire brushing process by only pushing the brush head, thereby simplifying the brushing process and improving the brushing efficiency. At the same time, the bristles under the upper brush plate are maintained in a relatively middle position on the upper part of the teeth, which is beneficial to the cleaning of the upper surface of the teeth and improves the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a partial structural schematic diagram of the present invention;

[0032] Figure 2 It is a partial structural decomposition schematic diagram of a specific embodiment of the present invention;

[0033] Figure 3 It is a partial structural schematic diagram of the connecting rod of the specific embodiment 1 of the present invention;

[0034] Figure 4 It is a partial structural schematic diagram of the rear brush plate of the specific embodiment 1 of the present invention;

[0035] Figure 5 It is a partial structural schematic diagram of the upper brush plate of the specific embodiment 1 of the present invention;

[0036] Figure 6 It is a partial structural schematic diagram of the front brush plate of the specific embodiment 1 of the present invention;

[0037] Figure 7 It is a partial structural schematic diagram of a specific embodiment 2 of the present invention;

[0038] Figure 8 It is a partial structural decomposition schematic diagram of a specific embodiment 2 of the present invention;

[0039] Fig. 9 It is a partial structural side view of the first gear of the second specific embodiment of the present invention. DETAILED DESCRIPTION

[0040] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0041] like Figures 1 to 9 As shown, a wrap-around toothbrush capable of maintaining the position of upper bristles comprises an electric toothbrush, the electric toothbrush comprises a brush head, the brush head comprises a brush head handle 1, the front portion of the brush head handle is provided with an upper brush plate 4, a front brush plate 2, and a rear brush plate 3, bristles are mounted on the lower surface of the upper brush plate, bristles are mounted on the rear side surface of the front brush plate, and bristles are mounted on the front side surface of the rear brush plate; a first rotating shaft is provided on the upper portion of the rear brush plate, a first rotating shaft hole is provided on the front portion of the brush head handle, and the first rotating shaft penetrates into the first rotating shaft hole; the upper brush plate is connected to the front brush plate by a transmission mechanism, the transmission mechanism comprises an elastic connecting member for resetting the front brush plate, and the elastic connecting member is arranged between the front brush plate and the rear brush plate. In this design, the upper brush plate and the front brush plate are linked by a transmission mechanism. When the front brush plate moves forward, the transmission mechanism drives the upper brush plate to move forward as well, so that the bristles below the upper brush plate are located in a relatively middle position on the upper part of the teeth, which is conducive to cleaning the upper surface of the teeth and is more suitable for cleaning the grooves in the middle of the upper surface of the molars. Through this design, the present invention provides a wrap-around toothbrush that can maintain the position of the upper bristles. The wrap-around effect produced by the bristles on three sides and the adaptive effect of the bristles automatically fitting with the thickness change from the incisors to the molars can meet the teeth cleaning needs of people with different oral cavity and tooth sizes. The design of the three-sided bristles solves the problem of cleaning the area on the inner side of the teeth that is not suitable for brushing, and avoids the formation of various bad brushing habits; at the same time, the bristles below the upper brush plate are maintained in a relatively middle position on the upper part of the teeth, which is conducive to cleaning the upper surface of the teeth and improves the cleaning effect. Specific embodiment one:

[0043] like Figures 1 to 6As shown, a wrap-around toothbrush capable of maintaining the position of upper bristles comprises an electric toothbrush, the electric toothbrush comprises a brush head, the brush head comprises a brush head handle, the front portion of the brush head handle is provided with an upper brush plate, a front brush plate, and a rear brush plate, bristles are arranged on the lower surface of the upper brush plate, bristles are arranged on the rear side surface of the front brush plate, and bristles are arranged on the front side surface of the rear brush plate; a first rotating shaft 22 is arranged on the upper portion of the rear brush plate, a first rotating shaft hole 10 is arranged on the front portion of the brush head handle, and the first rotating shaft penetrates into the first rotating shaft hole ; A first mounting plate 5 is provided at the rear part of the front brush plate; the upper brush plate and the front brush plate are linked by a transmission mechanism, the transmission mechanism comprising an elastic connecting member for resetting the front brush plate, the elastic connecting member being arranged between the front brush plate and the rear brush plate; a first fixing plate 14 is provided at the front part of the rear brush plate, the first fixing plate is provided with a first slide groove 21, the upper brush plate is arranged in the first slide groove, the length of the first slide groove is greater than the length of the upper brush plate; two mounting strips 25 are provided at the lower part of the first mounting plate, the two mounting strips are respectively arranged on the two side parts of the first mounting plate, the mounting strip is provided with a second slide groove 26, and the outer side part of the first fixing plate is arranged in the second slide groove; a second rotating shaft 18 is provided on one side part of the first fixing plate, the transmission mechanism comprises a connecting rod 8, a second rotating shaft hole 15 is provided on one side part of the connecting rod, the second rotating shaft penetrates into the second rotating shaft hole, a strip opening 16 is provided on the other side part of the connecting rod, a column 23 is provided on the upper surface of the upper brush plate, and the column penetrates into the strip opening; transmission mechanism It includes a pin 9, a mounting hole 6 is provided on the first mounting plate, the upper part of the pin is inserted into the mounting hole, the lower part of the pin is inserted into the strip-shaped opening, and the column is located between the pin and the second rotating shaft; the elastic connecting member adopts a first torsion spring 7, a fixed shaft 19 is provided on one side of the first fixed plate close to the second rotating shaft, a block-shaped protrusion 20 is provided on the front part of the first fixed plate, the middle part of the first torsion spring is sleeved on the fixed shaft, one side of the first torsion spring is against the block-shaped protrusion, and the other side of the first torsion spring is against the connecting rod. In this design, the transmission mechanism adopts components such as connecting rods, so that when the front brush plate moves forward, the pin drives the connecting rod to rotate around the second rotation axis at a certain angle, the connecting rod pushes the column forward, the upper brush plate can slide in the first slide groove, and then the column drives the upper brush plate to also move forward. Since the pin and the column are both located in the strip opening, and the column is located between the pin and the second rotation axis, the movement distance of the pin is greater than the movement distance of the column, and then the forward movement distance of the front brush plate is greater than the forward movement distance of the upper brush plate, so that the bristles under the upper brush plate are located in a relatively middle position on the upper part of the teeth, which is conducive to cleaning the upper surface of the teeth; at the same time, the spring coil in the middle of the first torsion spring is sleeved on the fixed shaft, and one side of it is against the connecting rod. When one side of the connecting rod rotates and moves forward, the first torsion spring is compressed. The first torsion spring generates a force to push the connecting rod back due to its elasticity, which has the effect of pulling back and resetting the front brush plate, and tightening the bristles to fit the teeth.

[0044] The second rotating shaft and the pin are respectively arranged on both sides of the connecting rod, and the column is located in the middle of the connecting rod. When the column further drives the upper brush plate to move, the bristles under the upper brush plate are located in the middle of the upper part of the teeth.

[0045] In order to ensure the structural strength, the first mounting plate and the mounting bar adopt an integrated structure. A notch is provided on the mounting bar away from the second rotation axis to facilitate the movement of the connecting rod. The connecting rod rotates around the second rotation axis at a certain angle, and the movement trajectory of one side of the connecting rod away from the second rotation axis is in an arc shape, and the notch is provided to facilitate the movement of the connecting rod.

[0046] In order to ensure the use effect of the first torsion spring, a protrusion 17 is provided on one side of the connecting rod close to the first torsion spring, and the cross section of the protrusion is semicircular. One side of the block-shaped protrusion close to the first torsion spring is inclined.

[0047] Since the upper brush plate is arranged in the first slide groove and the outer side of the first fixed plate is arranged in the second slide groove, in order to reduce the volume of the toothbrush head, the width of the upper brush plate gradually decreases from top to bottom; the width of the first fixed plate gradually decreases from top to bottom.

[0048] The first rotating shaft is in the shape of an inverted truncated cone. A mounting groove 11 is provided at the front of the brush head handle. The width of the rear part of the mounting groove is greater than the width of the upper part of the rotating shaft. The width of the front part of the mounting groove gradually decreases from top to bottom. The front part of the mounting groove is connected to the first rotating shaft hole. An embedded block 13 for inserting into the mounting groove is installed at the front of the brush head handle. The front part of the embedded block is provided with a contact surface for resisting the first rotating shaft. The contact surface is an arc surface. An insertion hole is provided on the brush head handle. A plug 12 for inserting into the insertion hole is provided at the rear part of the embedded block. The truncated cone-shaped first rotating shaft ensures the connection strength between the brush head handle and the rear brush plate. During installation, the first rotating shaft penetrates into the rear part of the mounting groove and slides into the first rotating shaft hole through the front part of the mounting groove. Then the embedded block is inserted into the mounting groove, and the embedded block is prevented from falling out of the mounting groove by the plug.

[0049] In order to ensure 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.

[0050] A first groove 24 is provided at the rear of the first mounting plate, and the width of the first groove gradually increases from the front to the back, and the front of the brush handle is arranged in the first groove. When brushing teeth, the front of the toothbrush is placed in the oral cavity, and the front of the brush handle is rotatably connected to the first rotating shaft. The user pushes the brush handle in the direction of brushing teeth, and the brush handle rotates. The front of the brush handle pushes the side wall of the first groove on the first mounting plate at the rear of the front brush plate, thereby moving the front brush plate forward, so that the front brush plate and the rear brush plate expand to both sides as the thickness of the teeth changes, and adapt to the thickness change between the incisors and molars. At the same time, the first torsion spring is used to pull back and reset the front brush plate, and the bristles are tightened and fit the teeth. Then, through the cooperation and action of the above components, the adaptive effect of brush head expansion, tightness and free angle change is achieved; the user no longer needs to actively change the position of the brush head to find the cleaning point, and only needs to push the brush head to complete the whole process of brushing teeth, which simplifies the brushing process and improves the brushing efficiency. Specific embodiment 2:

[0052] like Figure 1 and Figures 7 to 9As shown, a wrap-around toothbrush capable of maintaining the position of upper bristles comprises an electric toothbrush, the electric toothbrush comprising a brush head, the brush head comprising a brush head handle, an upper brush plate, a front brush plate and a rear brush plate are arranged at the front portion of the brush head handle, bristles are arranged on the lower surface of the upper brush plate, bristles are arranged on the rear side surface of the front brush plate, and bristles are arranged on the front side surface of the rear brush plate; a first rotating shaft is arranged at the upper portion of the rear brush plate, a first rotating shaft hole is arranged at the front portion of the brush head handle, and the first rotating shaft penetrates into the first rotating shaft hole; the upper brush plate and the front brush plate are linked by a transmission mechanism, the transmission mechanism comprises an elastic connecting member for resetting the front brush plate, and the elastic connecting member is arranged between the front brush plate and the rear brush plate; a second mounting plate is arranged at the rear portion of the front brush plate, and a second fixing plate 37 is arranged at the front of the rear brush plate, the second fixing plate is arranged below the first mounting plate, and the upper brush plate is arranged below the second fixing plate; the second fixing plate A first fixing column 36, a second fixing column 35, a third fixing column 33 and a fourth fixing column 34 are arranged on the plate from front to back; the cross section of the first fixing column is circular, a first gear 28 is mounted on the first fixing column, a second gear 29 is arranged below the first gear, and the first gear and the second gear adopt an integrated structure; the cross section of the second fixing column is circular, a third gear 30 is mounted on the second fixing column, and the second gear and the third gear are meshed and connected; a first rack 27 is arranged on one side of the lower part of the first mounting plate, the first rack is meshed and connected to the first gear, a second rack 38 is arranged on one side of the upper part of the upper brush plate, and the second rack is meshed and connected to the third gear; the elastic connecting member adopts a second torsion spring 32, a fifth fixing column 31 is arranged on the lower part of the first mounting plate, the middle part of the second torsion spring is sleeved on the third fixing column, one side of the second torsion spring abuts against the fourth fixing column, and the other side of the second torsion spring abuts against the fifth fixing column. In this design, the transmission mechanism adopts the first gear and other components, so that when the front brush plate moves forward, the first rack on the front brush plate drives the first gear to rotate. Since the first gear and the second gear are an integral part, the second gear drives the third gear to rotate, and the third gear drives the second rack on the upper brush plate to move forward, and then the second rack drives the upper brush plate to move forward, so that the bristles under the upper brush plate are located in a relatively middle position on the upper part of the teeth, which is beneficial to cleaning the upper surface of the teeth; at the same time, the spring coil in the middle part of the second torsion spring is sleeved on the third fixed column, and one side of it is against the fifth fixed column. When the front brush plate moves forward, the fifth fixed column on the front brush plate stretches the second torsion spring, and the second torsion spring generates a force to pull back the fifth fixed column due to its elasticity, which has the effect of pulling back and resetting the front brush plate, and tightening the bristles to fit the teeth; the gear transmission mechanism is adopted, and the forward movement distance of the upper brush plate can be better controlled.

[0053] When the front brush plate moves forward, the forward movement distance of the second rack is half of the forward movement distance of the first rack. Or, when the size of the gear teeth on the first gear is the same as the size of the gear teeth on the second gear, the number of gear teeth on the second gear is half of the number of gear teeth on the first gear. When the front brush plate drives the upper brush plate to move, the forward movement distance of the front brush plate is twice the forward movement distance of the upper brush plate, thereby maintaining the bristles under the upper brush plate in a relatively middle position on the upper part of the teeth to ensure the cleaning effect.

[0054] The second mounting plate and the first rack adopt an integrated structure, and the upper brush plate and the second rack adopt an integrated structure, so as to ensure the structural strength of the brush head.

[0055] In order to facilitate the assembly of the brush head, a through hole for inserting the fifth fixing column is provided on the first mounting plate. Thus, the fifth fixing column can be detachably connected to the first mounting plate through this design.

[0056] The first rotating shaft is in the shape of an inverted truncated cone. A mounting groove is provided at the front of the brush head handle. The width of the rear part of the mounting groove is greater than the width of the upper part of the rotating shaft. The width of the front part of the mounting groove gradually decreases from top to bottom. The front part of the mounting groove is connected to the first rotating shaft hole. An embedded block for inserting into the mounting groove is installed at the front of the brush head handle. The front part of the embedded block is provided with a contact surface for resisting the first rotating shaft. The contact surface is an arc surface. An insertion hole is provided on the brush head handle. A plug for inserting into the insertion hole is provided at the rear part of the embedded block. The truncated cone-shaped first rotating shaft ensures the connection strength between the brush head handle and the rear brush plate. During installation, the first rotating shaft penetrates into the rear part of the mounting groove and slides into the first rotating shaft hole through the front part of the mounting groove. Then the embedded block is inserted into the mounting groove, and the embedded block is prevented from falling out of the mounting groove by the plug.

[0057] In order to ensure 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.

[0058] A second groove is provided at the rear of the second mounting plate, and the width of the second groove gradually increases from front to back, and the front of the brush head handle is arranged in the second groove. When brushing teeth, the front of the toothbrush is placed in the oral cavity, and the front of the brush head handle is rotatably connected to the first rotating shaft. The user pushes the brush head handle in the direction of brushing teeth, and the brush head handle rotates. The front of the brush head handle pushes the side wall of the groove on the second mounting plate at the rear of the front brush plate, thereby moving the front brush plate forward, so that the front brush plate and the rear brush plate expand to both sides as the thickness of the teeth changes, and adapt to the thickness change between the incisors and molars. At the same time, the second torsion spring is used to pull back and reset the front brush plate, and the bristles are tightened and fit the teeth. Then, through the cooperation and action of the above components, the adaptive effect of brush head expansion, tightness and free angle change is achieved; the user no longer needs to actively change the position of the brush head to find the cleaning point, and only needs to push the brush head to complete the whole process of brushing teeth, which simplifies the brushing process and improves the brushing efficiency.

[0059] Finally, it should be noted that the above are only 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 can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wrap-around toothbrush capable of maintaining the position of upper bristles, comprising an electric toothbrush, the electric toothbrush comprising a brush head, characterized in that: The brush head comprises a brush head handle, the front part of which is provided with an upper brush plate, a front brush plate and a rear brush plate, bristles are arranged on the lower surface of the upper brush plate, bristles are arranged on the rear side surface of the front brush plate, and bristles are arranged on the front side surface of the rear brush plate; A first rotating shaft is provided on the upper part of the rear brush plate, a first rotating shaft hole is provided on the front part of the brush head handle, and the first rotating shaft penetrates into the first rotating shaft hole; The upper brush plate is connected to the front brush plate via a transmission mechanism, the transmission mechanism comprises an elastic connector for resetting the front brush plate, and the elastic connector is arranged between the front brush plate and the rear brush plate; A first fixing plate is provided at the front of the rear brush plate, a first sliding groove is provided on the first fixing plate, and the upper brush plate is arranged in the first sliding groove; A first mounting plate is provided at the rear of the front brush plate, two mounting strips are provided at the lower part of the first mounting plate, the two mounting strips are respectively arranged on two sides of the first mounting plate, a second slide groove is provided on the mounting strip, and the outer side of the first fixing plate is arranged in the second slide groove; A second rotating shaft is provided on one side of the first fixing plate, the transmission mechanism comprises a connecting rod, a second rotating shaft hole is provided on one side of the connecting rod, the second rotating shaft penetrates into the second rotating shaft hole, a strip opening is provided on the other side of the connecting rod, a column is provided on the upper surface of the upper brush plate, and the column penetrates into the strip opening; The transmission mechanism includes a pin, a mounting hole is provided on the first mounting plate, the upper portion of the pin is inserted into the mounting hole, the lower portion of the pin is inserted into the strip-shaped opening, and the column is located between the pin and the second rotating shaft; The elastic connecting member adopts a first torsion spring, and a fixed shaft is provided on one side of the first fixed plate close to the second rotating shaft. A block-shaped protrusion is provided at the front of the first fixed plate. The middle part of the first torsion spring is sleeved on the fixed shaft, one side of the first torsion spring abuts against the block-shaped protrusion, and the other side of the first torsion spring abuts against the connecting rod.

2. A wrap-around toothbrush capable of maintaining the position of upper bristles as claimed in claim 1, characterized in that: The second rotating shaft and the pin are respectively arranged on two sides of the connecting rod, and the column is located in the middle of the connecting rod.

3. A wrap-around toothbrush capable of maintaining the position of upper bristles as claimed in claim 1, characterized in that: A protrusion is provided on one side surface of the connecting rod close to the first torsion spring, and the cross section of the protrusion is semicircular.

4. A wrap-around toothbrush capable of maintaining the position of upper bristles as claimed in claim 1, characterized in that: The width of the upper brush plate gradually decreases from top to bottom; the width of the first fixing plate gradually decreases from top to bottom.

5. A wrap-around toothbrush capable of maintaining the position of upper bristles as claimed in claim 1, characterized in that: The first rotating shaft is in the shape of an inverted truncated cone.

6. A wrap-around toothbrush capable of maintaining the position of upper bristles as claimed in claim 1, characterized in that: A first groove is provided at the rear of the first mounting plate, the width of the first groove gradually increases from front to back, and the front of the brush head handle is arranged in the first groove.

7. A wrap-around toothbrush capable of maintaining the position of upper bristles, comprising an electric toothbrush, the electric toothbrush comprising a brush head, characterized in that: The brush head comprises a brush head handle, the front part of which is provided with an upper brush plate, a front brush plate and a rear brush plate, bristles are arranged on the lower surface of the upper brush plate, bristles are arranged on the rear side surface of the front brush plate, and bristles are arranged on the front side surface of the rear brush plate; A first rotating shaft is provided on the upper part of the rear brush plate, a first rotating shaft hole is provided on the front part of the brush head handle, and the first rotating shaft penetrates into the first rotating shaft hole; The upper brush plate is connected to the front brush plate via a transmission mechanism, the transmission mechanism comprises an elastic connector for resetting the front brush plate, and the elastic connector is arranged between the front brush plate and the rear brush plate; A second mounting plate is provided at the rear of the front brush plate, a second fixing plate is provided at the front of the rear brush plate, the second fixing plate is arranged below the second mounting plate, and the upper brush plate is arranged below the second fixing plate; The second fixing plate is provided with a first fixing column, a second fixing column, a third fixing column, and a fourth fixing column in sequence from front to back; The cross section of the first fixing column is circular, a first gear is mounted on the first fixing column, a second gear is disposed below the first gear, and the first gear and the second gear are in an integrated structure; The cross section of the second fixing column is circular, a third gear is mounted on the second fixing column, and the second gear is meshedly connected with the third gear; A first rack is provided on one side of the lower part of the second mounting plate, the first rack is meshed and connected to the first gear, and a second rack is provided on one side of the upper part of the upper brush plate, the second rack is meshed and connected to the third gear; The elastic connecting member adopts a second torsion spring, a fifth fixing column is provided at the lower part of the second mounting plate, the middle part of the second torsion spring is sleeved on the third fixing column, one side of the second torsion spring abuts against the fourth fixing column, and the other side of the second torsion spring abuts against the fifth fixing column.

8. A wrap-around toothbrush capable of maintaining the position of upper bristles as claimed in claim 7, characterized in that: The forward movement distance of the second rack is half of the forward movement distance of the first rack.

9. A wrap-around toothbrush capable of maintaining the position of upper bristles as claimed in claim 7, characterized in that: A second groove is provided at the rear of the second mounting plate, the width of the second groove gradually increases from front to back, and the front of the brush head handle is arranged in the second groove.

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