toothbrush

Abstract

The present invention belongs to the field of oral care, and in particular, relates to a toothbrush, including a brush head connecting rod, a connecting mechanism and a toothbrush handle, wherein the connecting mechanism includes a first connecting member, a second connecting member and an elastic structural member connected to the second connecting member, wherein the first connecting member is rotatably connected to the second connecting member, and the extension direction of the rotation axis is the front-back direction, and the elastic structural member includes at least one reset torsion spring, wherein the reset torsion spring includes a cylindrical coil spring with a tube mouth facing the extension direction parallel to the swing reference line and engaging with the second connecting member in a direction perpendicular to the swing reference line, and a first torsion bar and a second torsion bar respectively connected to the front and back ends of the coil spring. The toothbrush provided by the present invention can protect teeth.

Description

Technical Field

[0001] The invention belongs to the field of oral care, and in particular relates to a toothbrush. Background Art

[0002] When a toothbrush is used, the force used to clean teeth comes from the pressure and pushing force of the human hand. When brushing teeth, the user may unconsciously increase the pressure on the teeth through the toothbrush handle in the hope of achieving a better cleaning effect, causing the teeth to be subjected to a pressure that exceeds the pressure required for cleaning, which may cause damage to the teeth. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a toothbrush which is intended to improve the situation where teeth are damaged due to brushing too hard.

[0004] The present invention is achieved in that:

[0005] A toothbrush comprises a brush head connecting rod, a connecting mechanism and a toothbrush handle which are arranged in sequence from top to bottom, the brush head connecting rod being connected to a brush sweeping structure for brushing teeth, the connecting mechanism comprising a first connecting member, a second connecting member and an elastic structural member connected to the second connecting member, one of the first connecting member and the second connecting member being connected to the toothbrush handle, and the other being connected to the brush head connecting rod, the first connecting member being rotatably connected to the second connecting member, and the rotation axis being a swing reference line perpendicular to the up and down directions, the elastic structural member comprising at least one reset torsion spring, the reset torsion spring comprising a cylindrical coil spring whose tube mouth faces in a direction parallel to the extension direction of the swing reference line and is stop-matched with the second connecting member in a direction perpendicular to the swing reference line, and a first torsion bar and a second torsion bar respectively connected to the front and rear ends of the coil spring, the free end of the first torsion bar being stop-matched with the first connecting member, and the free end of the second torsion bar being stop-matched with the second connecting member.

[0006] Optionally, the second connecting member is provided with a mounting portion;

[0007] The reset torsion springs are provided with two, and the free ends of the two second torsion bars are connected to each other;

[0008] The two coil springs elastically abut against two oppositely disposed sides of the mounting portion respectively.

[0009] Optionally, both sides of the mounting portion that are relatively arranged have spring limiting grooves extending in the direction of the swing reference line, and the two spring limiting grooves are respectively used for partially inserting a coil spring and restricting the corresponding coil spring from moving in the up and down directions.

[0010] Optionally, the mounting portion is provided with a torsion bar limiting groove for inserting the two second torsion bars, and the torsion bar limiting groove limits the movement of the two second torsion bars in the up and down directions.

[0011] Optionally, the notch of the torsion bar limiting slot is a flared structure.

[0012] Optionally, both sides of the second connecting member that are arranged opposite to each other are protrudingly provided with limit platforms, and the two limit platforms abut against one end of one of the coil springs.

[0013] Optionally, each of the limit platforms is provided with a limit column, and each of the limit columns is plugged into the cylinder cavity of the corresponding coil spring;

[0014] The first connecting member has an anti-detachment portion, and the anti-detachment portion is used to prevent the two coil springs from detaching from the corresponding limiting columns.

[0015] Optionally, the two return torsion springs are symmetrically arranged in the up and down directions.

[0016] Optionally, the first connecting member has a first limiting portion and a second limiting portion, the first limiting portion abuts against the second connecting member when the second connecting member rotates counterclockwise to a first preset limiting angle relative to the first connecting member, and the second limiting portion abuts against the second connecting member when the second connecting member rotates clockwise to a second preset limiting angle relative to the first connecting member.

[0017] Optionally, the brushing structure includes a plurality of tooth bristles connected to one side of the brush head connecting rod and extending in a direction parallel to the swing reference line.

[0018] When brushing teeth, the brush sweeping structure needs to press against the teeth, and based on the structure of the present invention and combined with the principles of mechanics, it can be known that the force applied by the user to the toothbrush handle needs to pass through the connecting mechanism before it can be transmitted to the brush head connecting rod, wherein each reset torsion spring limits the transmission of the force that is not perpendicular to the parallel front and rear directions. Specifically, when the force that needs to be transmitted to the brush head connecting rod through the connecting mechanism and is not perpendicular to the parallel front and rear directions is just greater than the external force required for the elastic deformation of each reset torsion spring, each reset torsion spring will undergo elastic deformation, and the first connecting member and the second connecting member will rotate relative to each other. At this time, the pressure of the brush sweeping structure on the teeth will not be too large, and will not cause damage to the teeth.

[0019] And when the first connecting member and the second connecting member rotate relative to each other, the brush head connecting rod and the toothbrush handle will also rotate relative to each other, and the posture of the toothbrush handle will change significantly. The user can quickly feel the change in the posture of the toothbrush handle. At this time, the user can consciously control the force to reduce the pressure of the brushing structure on the teeth or no longer increase it, thereby avoiding damage to the teeth.

[0020] It can be seen from the above that the toothbrush provided by the present invention can play an effect of protecting teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a three-dimensional diagram of a toothbrush provided by an embodiment of the present invention;

[0023] Figure 2 is an exploded view of a toothbrush provided by an embodiment of the present invention from one viewing angle;

[0024] Figure 3 yes Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0025] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of B;

[0026] Figure 5 is an exploded view of a toothbrush provided by an embodiment of the present invention from another perspective;

[0027] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of C in the middle;

[0028] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of D in the middle;

[0029] Figure 8 It is a three-dimensional diagram of an elastic structural member provided in an embodiment of the present invention.

[0030] Description of Figure Numbers:

[0031]

[0032] DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] It should be noted that, in the embodiment of the present invention, according to Figure 1 , Figure 2 and Figure 5The XYZ rectangular coordinate system established in is defined as follows: the side located in the positive direction of the X axis is defined as the front, and the side located in the negative direction of the X axis is defined as the back; the side located in the positive direction of the Y axis is defined as the left, and the side located in the negative direction of the Y axis is defined as the right; the side located in the positive direction of the Z axis is defined as the top, and the side located in the negative direction of the Z axis is defined as the bottom.

[0035] An embodiment of the present invention provides a toothbrush.

[0036] See also Figures 1 to 8 The toothbrush comprises a brush head connecting rod 100, a connecting mechanism 200 and a toothbrush handle 300 which are arranged in sequence from top to bottom.

[0037] The brush head connecting rod 100 is connected to a brush sweeping structure 110 for brushing teeth. In actual use, since the brush sweeping structure 110 needs to be inserted into the oral cavity, the brush head connecting rod 100 is usually in a long strip shape, and the length direction is the up and down direction.

[0038] The toothbrush handle 300 is used for human hand holding. Therefore, in order to facilitate human hand holding, the toothbrush handle 300 is also in the shape of an elongated strip and also extends up and down. The outer surface of the toothbrush handle 300 can be provided with non-slip soft rubber and a groove structure that fits the structure of the human hand.

[0039] The connecting mechanism 200 is used to connect the brush head connecting rod 100 and the toothbrush handle 300. The connecting mechanism 200 includes a first connecting member 210, a second connecting member 220 and an elastic structural member 230 connected to the second connecting member 220. One of the first connecting member 210 and the second connecting member 220 is connected to the toothbrush handle 300, and the other is connected to the brush head connecting rod 100. In an embodiment of the present invention, the first connecting member 210 is connected to the toothbrush handle 300, and the second connecting member 220 is connected to the brush head connecting rod 100. In other embodiments, the first connecting member 210 can be connected to the brush head connecting rod 100, and the second connecting member 220 is connected to the toothbrush handle 300.

[0040] The first connecting member 210 is rotatably connected to the second connecting member 220, and the axis of rotation is a swing reference line perpendicular to the up-down direction. In this embodiment, the extension direction of the swing reference line is parallel to the front-back direction, so the brush head connecting rod 100 swings left and right relative to the toothbrush handle 300, while in other embodiments, the extension direction of the swing reference line may be parallel to the left-right direction, so the brush head connecting rod 100 swings back and forth relative to the toothbrush handle 300. The elastic structural member 230 includes at least one reset torsion spring 231, the reset torsion spring 231 includes a cylindrical coil spring 2311 with the mouth of the coil facing parallel to the extension direction of the swing reference line and engaging with the second connecting member 220 in a direction perpendicular to the swing reference line, and a first torsion bar 2312 and a second torsion bar 2313 respectively connected to the front and back ends of the coil spring 2311, the free end of the first torsion bar 2312 engages with the first connecting member 210, and the free end of the second torsion bar 2313 engages with the second connecting member 220.

[0041] When brushing teeth, the brush sweeping structure 110 needs to press against the teeth. Based on the structure of the present invention and combined with the principles of mechanics, it can be known that the force applied by the user to the toothbrush handle 300 needs to pass through the connecting mechanism 200 before it can be transmitted to the brush head connecting rod 100. Among them, each reset torsion spring 231 limits the transmission of the force that is not perpendicular to the parallel front and rear directions. Specifically, when the force that needs to be transmitted to the brush head connecting rod 100 through the connecting mechanism 200 and is not perpendicular to the parallel front and rear directions is just greater than the external force required for the elastic deformation of each reset torsion spring 231, each reset torsion spring 231 will undergo elastic deformation, and the first connecting member 210 and the second connecting member 220 will rotate relative to each other. At this time, the pressure of the brush sweeping structure 110 on the teeth will not be too large, nor will it cause damage to the teeth.

[0042] When the first connecting member 210 and the second connecting member 220 rotate relative to each other, the brush head connecting rod 100 and the toothbrush handle 300 will also rotate relative to each other, and the posture of the toothbrush handle 300 will change significantly. The user can quickly feel the change in the posture of the toothbrush handle 300. At this time, the user can consciously control the force to reduce or stop the pressure of the brushing structure 110 on the teeth, thereby avoiding damage to the teeth.

[0043] From the above analysis, the toothbrush provided in the embodiment of the present invention can play an effect of protecting teeth.

[0044] See also Figures 2 to 7In the embodiment of the present invention, the second connecting member 220 is provided with a mounting portion 221; the return torsion spring 231 is provided with two, and the free ends of the two second torsion bars 2313 are connected to each other; the two coil springs 2311 elastically abut against the two oppositely arranged sides of the mounting portion 221; in this embodiment, the two coil springs 2311 elastically abut against the left and right sides of the mounting portion 221. Based on this, during the assembly process, the two coil springs 2311 are clamped to the mounting portion 221, that is, the elastic structure 230 is installed on the second connecting member 220, which greatly simplifies the assembly efficiency between the elastic structure 230 and the second connecting member 220.

[0045] See also Figures 2 to 7 In the embodiment of the present invention, both sides of the mounting portion 221 that are arranged opposite to each other are provided with spring limiting grooves 22101 extending in the direction of the swing reference line; in the present embodiment, both sides of the mounting portion 221 that are arranged opposite to each other are provided with spring limiting grooves 22101 extending in the front-rear direction. The two spring limiting grooves 22101 are respectively provided for the partial insertion of a coil spring 2311, and limit the corresponding coil spring 2311 from moving in the up-down direction. In this way, after the partial parts of the two coil springs 2311 are respectively inserted into the two spring limiting grooves 22101, the two spring limiting grooves 22101 will respectively limit the corresponding coil spring 2311 from moving in the up-down direction, and prevent the two coil springs 2311 from moving in the up-down direction relative to the second connecting member 220, which can improve the stability of the connection between the elastic structural member 230 and the second connecting member 220.

[0046] Specifically, in the embodiment of the present invention, the groove shape of the spring limiting groove 22101 matches the part of the corresponding coil spring 2311 .

[0047] See also Figures 2 to 7 In the embodiment of the present invention, the mounting portion 221 is provided with a torsion bar limiting groove 22102 for inserting the two second torsion bars 2313, and the torsion bar limiting groove 22102 limits the two second torsion bars 2313 from moving in the up-down direction. Thus, after the two second torsion bars 2313 are inserted into the torsion bar limiting groove 22102, the torsion bar limiting groove 22102 will limit the two second torsion bars 2313 from moving in the up-down direction, thereby further limiting and preventing the elastic structure 230 from moving in the up-down direction, which can further improve the stability of the connection between the elastic structure 230 and the second connecting member 220.

[0048] Furthermore, in the embodiment of the present invention, the notch of the torsion bar limiting groove 22102 is a flared structure. Based on this, in the process of inserting the two second torsion bars 2313 into the torsion bar limiting groove 22102, the flared structure of the notch of the torsion bar limiting groove 22102 can guide the two second torsion bars 2313 to be quickly inserted into the torsion bar limiting groove 22102, thereby improving the efficiency of inserting the two second torsion bars 2313 into the torsion bar limiting groove 22102.

[0049] In other embodiments, the torsion bar limiting groove 22102 may be disposed on the rear side of the mounting portion 221 .

[0050] See also Figures 2 to 7 In the embodiment of the present invention, both sides of the second connecting member 220 are provided with stoppers 2211; in the present embodiment, both sides of the second connecting member 220 are provided with stoppers 2211. The two stoppers 2211 are in contact with one end of a coil spring 2311. In combination with the above structure, after the two coil springs 2311 are clamped to the mounting portion 221, it usually takes a little time to adjust the relative position relationship between the elastic structure 230 and the mounting portion 221 in the front-to-back direction. Based on this structure, after the two coil springs 2311 are clamped to the mounting portion 221, one end of the two coil springs 2311 is pushed against the corresponding stoppers 2211 respectively, and the relative position relationship between the elastic structure 230 and the mounting portion 221 in the front-to-back direction can be adjusted. The whole process is simple and fast, which greatly improves the adjustment efficiency of the relative position relationship between the elastic structure 230 and the mounting portion 221 in the front-to-back direction.

[0051] It should be noted that in the embodiment of the present invention, the coil spring 2311 abuts against the limit platform 2211 through its rear end, while in other embodiments, such as when the torsion bar limit groove 22102 is arranged on the rear side of the mounting portion 221, the coil spring 2311 abuts against the limit platform 2211 through its front end.

[0052] See also Figures 2 to 7 In the embodiment of the present invention, each limiting platform 2211 is provided with a limiting column 2212, and each limiting column 2212 is inserted into the barrel cavity of the corresponding coil spring 2311; the first connecting member 210 has an anti-detachment portion 211, and the anti-detachment portion 211 is used to prevent the two coil springs 2311 from detaching from the corresponding limiting column 2212. Based on this, the limiting column 2212 and the anti-detachment portion 211 limit the position of the elastic structure 230, so as to prevent the elastic structure 230 from detaching from the predetermined position when deformed, and it is not easy for the elastic structure 230 to fail, thereby improving the structural reliability of the connecting mechanism 200.

[0053] After the parts of the two coil springs 2311 are respectively inserted into the two spring limiting grooves 22101, the two spring limiting grooves 22101 will respectively limit the corresponding coil springs 2311 from moving in the up and down directions, thereby preventing the two coil springs 2311 from moving in the up and down directions relative to the second connecting member 220. This can improve the stability of the connection between the elastic structural member 230 and the second connecting member 220.

[0054] See also Figures 2 to 8 In the embodiment of the present invention, the two return torsion springs 231 are symmetrically arranged on both sides of the swing reference line.

[0055] See also Figures 2 to 7 In the embodiment of the present invention, the first connecting member 210 has a first limiting portion 212 and a second limiting portion 213. The first limiting portion 212 abuts against the second connecting member 220 when the second connecting member 220 rotates counterclockwise relative to the first connecting member 210 to a first preset limiting angle, and the second limiting portion 213 abuts against the second connecting member 220 when the second connecting member 220 rotates clockwise relative to the first connecting member 210 to a second preset limiting angle. Based on this, first, when the second connecting member 220 rotates counterclockwise to the first preset limit angle relative to the first connecting member 210, the first limiting portion 212 abuts against the left side of the second connecting member 220, and the first limiting portion 212 limits the second connecting member 220 from continuing to rotate counterclockwise. In this embodiment, the first limiting portion 212 limits the left rotation range of the brush head connecting rod 100 relative to the toothbrush handle 300, thereby preventing the brush head connecting rod 100 from rotating counterclockwise too much relative to the toothbrush handle 300 and affecting the normal use of the toothbrush. Secondly, when the second connecting member 220 rotates clockwise to the second preset limit angle relative to the first connecting member 210, the second limiting portion 213 abuts against the second connecting member 220. In this embodiment, the second limiting portion 213 limits the second connecting member 220 from continuing to rotate rightward. Thus, the clockwise rotation range of the brush head connecting rod 100 relative to the toothbrush handle 300 is prevented from being too large and affecting the normal use of the toothbrush.

[0056] Specifically, in this embodiment, the first preset limit angle and the second preset limit angle are both 10 degrees.

[0057] See also Figure 1 , Figure 2 and Figure 5In the embodiment of the present invention, the brushing structure 110 includes a plurality of tooth bristles connected to one side of the brush head connecting rod 100 and extending in a direction parallel to the swing reference line. Based on this, in the specific use process, that is, when brushing teeth, the tips of the tooth bristles face downward or upward (this position is the actual position) to press against the teeth. At this time, the toothbrush handle 300 can be rotated to the left or right (this position is the reference position shown in the figure) through the connecting mechanism 200, so that the toothbrush handle 300 is closer to the human mouth, thereby improving the comfort of the user holding the toothbrush handle 300. Therefore, the present invention can not only protect the teeth, but also improve the comfort of holding the toothbrush handle 300.

[0058] In other embodiments, the tooth bristles are connected to the rear side of the brush head link 100 .

[0059] See also Figures 2 to 7 In the embodiment of the present invention, the connecting mechanism 200 further includes an enclosure 240, which together with the first connecting member 210 forms an enclosure space for accommodating the elastic structural member 230, and a portion of the second connecting member 220 is placed in the enclosure space, thereby protecting the elastic structural member 230.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A toothbrush, characterized in that: It includes a brush head connecting rod, a connecting mechanism and a toothbrush handle which are arranged in sequence from top to bottom, the brush head connecting rod is connected to a brush structure for brushing teeth, the connecting mechanism includes a first connecting member, a second connecting member and an elastic structural member connected to the second connecting member, one of the first connecting member and the second connecting member is connected to the toothbrush handle, and the other is connected to the brush head connecting rod, the first connecting member is rotatably connected to the second connecting member, and the rotation axis is a swing reference line perpendicular to the up and down directions, the elastic structural member includes at least one reset torsion spring, the reset torsion spring includes a cylindrical coil spring with a tube mouth facing in a direction parallel to the extension direction of the swing reference line and stop-matched with the second connecting member in a direction perpendicular to the swing reference line, and a first torsion bar and a second torsion bar respectively connected to the front and rear ends of the coil spring, the free end of the first torsion bar is stop-matched with the first connecting member, and the free end of the second torsion bar is stop-matched with the second connecting member.

2. The toothbrush according to claim 1, characterized in that The second connecting member is provided with a mounting portion; The reset torsion springs are provided with two, and the free ends of the two second torsion bars are connected to each other; The two coil springs elastically abut against two oppositely disposed sides of the mounting portion respectively.

3. The toothbrush according to claim 2, characterized in that The two opposite sides of the mounting portion are provided with spring limiting grooves extending in the direction of the swing reference line. The two spring limiting grooves are respectively used for partially inserting a coil spring and restricting the corresponding coil spring from moving in the up and down directions.

4. The toothbrush according to claim 3, characterized in that The mounting portion is provided with a torsion bar limiting groove for the two second torsion bars to be placed therein, and the torsion bar limiting groove limits the two second torsion bars from moving in the up and down directions.

5. The toothbrush according to claim 4, characterized in that The notch of the torsion bar limiting groove is a flared structure.

6. The toothbrush according to claim 3, characterized in that Limiting platforms are protruded from two oppositely arranged sides of the second connecting member, and the two limiting platforms abut against one end of a coil spring.

7. The toothbrush according to claim 6, characterized in that Each of the limit platforms is provided with a limit column, and each of the limit columns is plugged into the cylinder cavity of the corresponding coil spring; The first connecting member has an anti-detachment portion, and the anti-detachment portion is used to prevent the two coil springs from detaching from the corresponding limiting columns.

8. The toothbrush according to claim 2, characterized in that The two reset torsion springs are symmetrically arranged on both sides of the swing reference line.

9. The toothbrush according to any one of claims 1 to 8, characterized in that The first connecting member has a first limiting portion and a second limiting portion. The first limiting portion abuts against the second connecting member when the second connecting member rotates counterclockwise to a first preset limiting angle relative to the first connecting member, and the second limiting portion abuts against the second connecting member when the second connecting member rotates clockwise to a second preset limiting angle relative to the first connecting member.

10. The toothbrush according to any one of claims 1 to 8, characterized in that The brushing structure includes a plurality of tooth bristles connected to one side of the brush head connecting rod and extending in a direction parallel to the swing reference line.

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