Plug-pull structure for sectional toothbrush head and electric toothbrush

Abstract

The utility model relates to the field of electric toothbrushes, and provides a plugging structure for a sectional toothbrush head and an electric toothbrush, the plugging structure comprises a shaft sleeve and a connecting seat, the shaft sleeve is arranged at the end part of a second body, and a pair of elastic clamping blocks are arranged on two sides of the shaft sleeve; the connecting base is arranged at the top of the toothbrush body, a fixed clamping block is arranged on the outer side wall of the connecting base, at least part of the projection of the elastic clamping blocks on the connecting base is overlapped with the fixed clamping block, and at least part of the pair of elastic clamping blocks abuts against the fixed clamping block all the time, so that the second body is suitable for being inserted into the connecting base at any angle. The electric toothbrush comprises a pluggable structure. The elastic clamping blocks are at least partially overlapped with the fixed clamping block in the projection range of the connecting seat, so that the pair of elastic clamping blocks always at least partially abut against the fixed clamping block, no matter what rotation angle the second body is located, the elastic clamping blocks can form a reliable connection relation with the fixed clamping block, and the reliability of the second body is improved. Therefore, the second body can be smoothly inserted into and pulled out of the connecting seat of the toothbrush main body at any angle.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrushes, and further to a plug-in structure for segmented toothbrush heads and an electric toothbrush. Background Technology

[0002] Existing electric toothbrush heads are typically one-piece designs. While their vibration is quite significant, the brush handle comes into contact with the user's lips or mouth during use. The high-frequency vibration of the handle can easily cause numbness in the lips or mouth, leading to discomfort. To address this, the toothbrush head can be designed with a segmented structure. The brush head assembly within the first body is connected to the drive shaft of the main body via a transmission component within the second body. This allows the drive shaft to directly drive the brush head assembly to vibrate, while the second body remains stationary. This avoids numbness in the lips or mouth caused by brush handle vibration, significantly improving the user experience.

[0003] The connection between a typical toothbrush head and the toothbrush body usually employs a foolproof design, ensuring that the bushing can only be smoothly inserted or removed from the connecting seat of the toothbrush body when the bristles of the toothbrush head are facing upwards. However, in segmented toothbrush heads, the second body is separate from the first body, and the second body can easily rotate relative to the first body. This means that each time a segmented toothbrush head is inserted or removed, it is necessary not only to ensure that the bristles of the first body are facing upwards, but also to adjust the position of the second body so that its bushing is aligned with the connecting seat of the toothbrush body. This makes the connection process for segmented toothbrush heads to the toothbrush body more cumbersome, time-consuming, and laborious. Utility Model Content

[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide a plug-in / plug-out structure for segmented toothbrush heads and an electric toothbrush. The elastic locking blocks at least partially overlap with the fixed locking blocks within the projection range of the connecting base, ensuring that a pair of elastic locking blocks always at least partially abut against the fixed locking blocks. Regardless of the rotation angle of the second body, the elastic locking blocks can form a reliable connection with the fixed locking blocks, thereby guaranteeing that the second body can be smoothly plugged into and unplugged onto the connecting base of the toothbrush body at any angle. Users do not need to precisely align the angle of the second body to easily replace the toothbrush head, simplifying the installation and removal process of the toothbrush head, improving the flexibility and convenience of use, and significantly enhancing the user experience.

[0005] To achieve the above objectives, this utility model provides a plug-in structure for a segmented toothbrush head. The segmented toothbrush head includes a first body and a second body. The first body is provided with a brush head assembly, and the second body is provided with a transmission assembly suitable for transmitting and connecting the brush head assembly and the drive shaft. The plug-in structure includes a bushing and a connecting seat. The bushing is disposed at the end of the second body, and a pair of elastic locking blocks are provided on both sides of the bushing.

[0006] The connecting seat is disposed on the top of the toothbrush body. A fixing block is provided on the outer side wall of the connecting seat. The elastic block at least partially overlaps with the fixing block on the projection of the connecting seat. During the snapping process of the bushing and the connecting seat, at least partially of the pair of elastic blocks always abut against the fixing block, so that the second body is suitable for insertion and removal of the connecting seat disposed on the toothbrush body at any angle.

[0007] In some embodiments, a pair of elastic blocks are symmetrically arranged on both sides of the bushing. The included angle between the two elastic blocks at their circumferentially close ends of the bushing is a first included angle, and the included angle between the two circumferentially distant ends of the connecting seat is a second included angle. The first included angle is smaller than the second included angle, so that the circumference of the fixed block is always greater than the maximum circumference of the interval between the pair of elastic blocks.

[0008] In some embodiments, the first included angle is 110°-130° and the second included angle is 150°-170°.

[0009] In some embodiments, the first included angle is 120°, the second included angle is 160°, and at least one-quarter of the fixed block always remains in contact with the elastic block.

[0010] In some embodiments, the bushing has an axially penetrating mounting hole, the connecting seat is adapted to be inserted into the mounting hole, the mounting hole has symmetrical elastic grooves on both sides, and the elastic locking block is disposed in the elastic groove.

[0011] In some embodiments, the connecting seat is further provided with a first abutting block, which is disposed below the fixing block, and an installation groove is formed between the first abutting block and the fixing block; the elastic block is adapted to be snapped into the installation groove;

[0012] The bottom of the bushing is also provided with a second abutting block, and the inner sidewall of the second abutting block is adapted to abut against the first abutting block.

[0013] In some embodiments, the outer side wall of the first abutment block includes a first guide wall, a smooth wall, and a second guide wall arranged from top to bottom. The first guide wall extends arc-shaped along the central axis of the connecting seat to the side away from the connecting seat. The smooth wall connects the end of the first guide wall and the beginning of the second guide wall and is relatively parallel to the central axis of the connecting seat. The second guide wall extends arc-shaped along the central axis of the connecting seat to the side closer to the connecting seat.

[0014] In some embodiments, the second abutment block is circumferentially around the bushing, and a first groove is provided on the outer wall of the second abutment block. A first protrusion is provided on the inner side of the second body. The first protrusion of the second body is adapted to abut and be fixed in the first groove of the second abutment block, so that the bushing can rotate with the second body.

[0015] In some embodiments, the top of the bushing is further provided with a third abutment block, which is symmetrically arranged on the other two sides of the mounting channel. The symmetry line of the third abutment block is perpendicular to the symmetry line of the elastic locking block, and the third abutment block is adapted to abut against the top of the connecting seat.

[0016] According to another aspect of this application, an electric toothbrush is further provided, including any of the above preferred embodiments of a plug-in structure for a segmented toothbrush head, a segmented toothbrush head, and a toothbrush body. The segmented toothbrush head includes a first body and a second body that can rotate relative to each other. The second body can be fixedly installed at any angle on the connecting seat of the toothbrush body through the plug-in structure.

[0017] Compared with the prior art, the plug-in structure for segmented toothbrush heads and the electric toothbrush provided by this utility model have at least one of the following beneficial effects:

[0018] 1. The elastic blocks overlap at least partially with the fixed blocks within the projection range of the connector, ensuring that the pair of elastic blocks always at least partially abut against the fixed blocks. Regardless of the rotation angle of the second body, the elastic blocks can form a reliable connection with the fixed blocks, thus guaranteeing that the second body can be smoothly inserted and removed from the connector of the toothbrush body at any angle. Users do not need to precisely align the angle of the second body to easily replace the toothbrush head, simplifying the installation and removal process of the toothbrush head, improving the flexibility and convenience of use, and significantly enhancing the user experience.

[0019] 2. The circumference of the fixed block is always greater than the maximum circumference of the elastic block interval. When the elastic block interacts with the fixed block, it can always maintain at least a partial contact relationship. This not only provides a stable connection force for the insertion and removal process, but also ensures that the second body can be smoothly inserted and removed into the connecting seat of the toothbrush body at any angle without jamming or loosening.

[0020] 3. At least one-quarter of the fixed locking block always remains in contact with the elastic locking block, providing a larger contact area and thus significantly improving the stability of the connection.

[0021] 4. The mounting slot provides more precise positioning for the elastic locking block, ensuring the firmness and reliability of the connection; when the second abutting block abuts against the first abutting block, a stable support structure is formed, allowing the second body to be set more stably above the toothbrush body, effectively preventing the second body from wobbling left and right during use, thereby improving the stability and reliability of the entire toothbrush head insertion and removal structure. Attached Figure Description

[0022] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0023] Figure 1 This is a cross-sectional view of an electric toothbrush;

[0024] Figure 2 This is a connection diagram of the bushing and the connecting seat;

[0025] Figure 3 This is a structural diagram of the bushing;

[0026] Figure 4 This is a structural diagram of the connector;

[0027] Figure 5 This is the structural diagram of the first included angle;

[0028] Figure 6 This is the structural diagram of the second included angle.

[0029] Explanation of icon numbers:

[0030] First body 1, brush head assembly 11

[0031] The second body 2, the first protrusion 20, the transmission assembly 21, the bushing 22, the first groove 221, the elastic locking block 222, the first included angle 2221, the mounting hole 2222, the elastic groove 2223, the second abutting block 224, and the third abutting block 225.

[0032] Toothbrush body 3, connecting seat 31, mounting groove 311, drive shaft 32, fixing block 313, first guide wall 3131, smooth wall 3132, second guide wall 3133, second included angle 3134, first abutting block 314. Detailed Implementation

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0034] To keep the drawings concise, each figure only schematically shows the parts relevant to the utility model, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0035] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0036] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0038] refer to Figure 1 and Figure 2 This utility model provides a plug-in structure for a segmented toothbrush head. The segmented toothbrush head includes a first body 1 and a second body 2. The first body 1 is provided with a brush head assembly 11, and the second body 2 is provided with a transmission assembly 21 suitable for connecting the brush head assembly 11 and the drive shaft 32. The plug-in structure includes a bushing 22 and a connecting seat 31. The bushing 22 is located at the end of the second body 2, and a pair of elastic locking blocks 222 are provided on both sides of the bushing 22. The connecting seat 31 is located at the top of the toothbrush body 3, and a fixing block 313 is provided on the outer side wall of the connecting seat 31. The projection of the elastic locking block 222 on the connecting seat 31 at least partially overlaps with the fixing block 313. During the snapping process of the bushing 22 and the connecting seat 31, the pair of elastic locking blocks 222 always at least partially abut against the fixing block 313, so that the second body 2 is suitable for plugging and unplugging the connecting seat 31 located on the toothbrush body 3 at any angle.

[0039] In this embodiment, the elastic locking block 222 overlaps at least partially with the fixed locking block 313 within the projection range of the connecting seat 31, so that the pair of elastic locking blocks 222 always at least partially abut against the fixed locking block 313. No matter what rotation angle the second body 2 is in, the elastic locking block 222 can form a reliable connection with the fixed locking block 313, thereby ensuring that the second body 2 can be smoothly inserted and removed from the connecting seat 31 of the toothbrush body 3 at any angle. The user does not need to precisely align the angle of the second body 2 to easily complete the replacement of the toothbrush head, which simplifies the installation and removal process of the toothbrush head, improves the flexibility and convenience of use, and significantly enhances the user experience.

[0040] Specifically, this application aims to solve the problems of complex operation, easy loosening, and inability of the second body 2 to connect with the toothbrush body 3 at any angle during the insertion and removal of segmented toothbrush heads, while improving the user experience. A bushing 22 is located at the end of the second body 2, with a pair of elastic locking blocks 222 on both sides. The elastic locking blocks 222 have a certain elastic deformation capacity, providing a stable connection force during insertion and removal. In this application, the bushing 22 has an axially penetrating mounting channel 2222, and the connecting seat 31 is adapted to be inserted into the mounting channel 2222. The mounting channel 2222 has symmetrical elastic grooves on both sides, and the elastic locking blocks 222 are disposed within the elastic grooves. The elastic grooves not only provide sufficient space for the elastic locking blocks 222 to achieve elastic deformation, but also ensure that when the connecting seat 31 is inserted into the mounting channel 2222, the elastic locking blocks 222 can stably interact with the fixing blocks 313 on the connecting seat 31, thereby achieving a reliable connection. A pair of elastic blocks 222 provide a larger contact area for the bushing 22 so that it can later engage with the retaining clip on the connecting seat 31.

[0041] The connecting seat 31 is located on the top of the toothbrush body 3, and its outer wall has a fixing block 313. The elastic block 222 overlaps at least partially with the fixing block 313 within the projection range of the connecting seat 31. This ensures that during the snap-fit ​​connection between the bushing 22 and the connecting seat 31, the pair of elastic blocks 222 always at least partially abut against the fixing block 313, providing reliable connection stability and allowing the second body 2 to be smoothly inserted and removed into the connecting seat 31 of the toothbrush body 3 at any rotation angle. First, the cooperation between the elastic block 222 and the fixing block 313 ensures a firm and reliable connection between the toothbrush head and the toothbrush body 3. Even under high-frequency vibration, the toothbrush head will not loosen or fall off, thus guaranteeing the cleaning effect and lifespan of the electric toothbrush. Second, the bushing 22 of the second body 2 can adapt to any angle of insertion and removal, greatly simplifying the installation and removal process of the toothbrush head. Users can easily replace the toothbrush head without precisely aligning the angle of the second body 2, improving the flexibility and convenience of use. This design is particularly suitable for use in dimly lit or limited operating spaces, significantly enhancing the user experience.

[0042] Further, refer to Figure 5 and Figure 6 A pair of elastic blocks 222 are symmetrically arranged on both sides of the bushing 22. The angle between the two elastic blocks 222 and the ends of the bushing 22 that are close to each other in the circumferential direction is the first angle 2221. The angle between the two ends of the fixed block 313 that are far away from each other in the circumferential direction is the second angle 3134. The first angle 2221 is smaller than the second angle 3134, so that the perimeter of the fixed block 313 is always greater than the maximum perimeter of the interval between the two elastic blocks 222.

[0043] In this embodiment, the perimeter of the fixed block 313 is always greater than the maximum perimeter of the elastic block 222. When the elastic block 222 interacts with the fixed block 313, it can always maintain at least a partial contact relationship. This not only provides a stable connection force for the insertion and removal process, but also ensures that the second body 2 can be smoothly inserted and removed into the connecting seat 31 of the toothbrush body 3 at any angle without jamming or loosening.

[0044] Specifically, a pair of elastic locking blocks 222 are symmetrically arranged on both sides of the bushing 22. This not only ensures the balance of the structure but also makes the force more even. Furthermore, the spacing between the pair of elastic locking blocks 222 is equal, allowing comparison with the circumferential length of the fixed locking block 313, ensuring that the pair of elastic locking blocks 222 and the fixed locking block 313 always at least partially overlap. Specifically, the included angle between the two ends of the pair of elastic locking blocks 222 that are close to each other circumferentially on the bushing 22 is defined as a first included angle 2221. Simultaneously, the included angle between the two ends of the fixed locking block 313 on the connecting seat 31 that are far apart circumferentially on the connecting seat 31 is defined as a second included angle 3134. The first included angle 2221 is set smaller than the second included angle 3134, ensuring that the circumference of the fixed locking block 313 is always greater than the maximum circumference of the gap between the pair of elastic locking blocks 222, thus providing stable support during insertion and removal. Preferably, the first included angle 2221 is 110°-130°, and the second included angle 3134 is 150°-170°, making the interaction between the elastic locking block 222 and the fixed locking block 313 more efficient. This ensures that the toothbrush head will not loosen or fall off during use, regardless of the rotation angle of the second body 2. It is worth noting that since a pair of elastic locking blocks 222 are symmetrically arranged on both sides of the bushing 22, as long as the elastic locking blocks 222 have a certain circumferential length, the first included angle 2221 between the pair of elastic locking blocks 222 will definitely be less than 180°. Therefore, the second included angle 3134 of the fixed locking block 313 on the connecting seat 31 does not need to be greater than 180°. Of course, the optimal second included angle 3134 of the fixed locking block 313 on the connecting seat 31 is 360°, which results in a larger contact area and better stability. However, due to the limitations of the injection molding process, the fixed block 313 cannot be made to be greater than 180°. Instead, the first included angle 2221 between a pair of elastic blocks 222 can be minimized, so that the first included angle 2221 between a pair of elastic blocks 222 is less than the second included angle 3134 of the fixed block 313 in the circumference. In other words, the fixed block 313 can be larger than the interval between the elastic blocks 222.

[0045] Furthermore, the first included angle 2221 is 120°, the second included angle 3134 is 160°, and at least one-quarter of the fixed locking block 313 always remains in contact with the elastic locking block 222.

[0046] In this embodiment, at least one-quarter of the fixed block 313 always remains in contact with the elastic block 222, which can provide a larger contact area and thus significantly improve the stability of the connection.

[0047] Specifically, the first included angle 2221 is 120°, ensuring that the elastic locking block 222 has an appropriate spacing around the bushing 22. This guarantees that the elastic locking block 222 can smoothly enter and exit the range of the fixed locking block 313 during insertion and removal, and also ensures that the elastic locking block 222 can provide sufficient support force in the connected state. The second included angle 3134 is 160°, meaning that the portion of the fixed locking block 313 that is more than 40° from the elastic locking block 222 always abuts against the elastic locking block 222. This abutting portion occupies one-quarter of the total area of ​​the fixed locking block 313. This is to ensure an effective connection between the fixed locking block 313 and the elastic locking block 222; at least one-quarter of the fixed locking block 313 must always maintain contact with the elastic locking block 222 to provide a more stable abutting force and connection force. Of course, if the manufacturing process allows, the coverage area of ​​the fixing block 313 can be further expanded, ensuring that the perimeter of the fixing block 313 is always greater than the maximum perimeter of the elastic block 222, thus providing more stable support for the elastic block 222 during insertion and removal. During use, regardless of the rotation angle of the second body 2, the elastic block 222 can form a sufficiently reliable connection with the fixing block 313, ensuring that the toothbrush head will not loosen or fall off under high-frequency vibration. This stable connection not only improves the cleaning effect of the toothbrush but also enhances safety during use, reducing potential safety risks caused by loose connections.

[0048] Further, refer to Figures 2 to 4 The connecting seat 31 is also provided with a first abutting block 314, which is located below the fixing block 313. An installation groove 311 is formed between the first abutting block 314 and the fixing block 313. The elastic block 222 is adapted to be snapped into the installation groove 311. The bottom of the bushing 22 is also provided with a second abutting block 224, and the inner sidewall of the second abutting block 224 is adapted to abut against the first abutting block 314.

[0049] In this embodiment, the mounting groove 311 provides more precise positioning for the elastic locking block 222, ensuring the firmness and reliability of the connection; when the second abutting block 224 abuts against the first abutting block 314, a stable support structure is formed, allowing the second body 2 to be more stably positioned above the toothbrush body 3, effectively preventing the second body 2 from wobbling left and right during use, thereby improving the stability and reliability of the entire toothbrush head insertion and removal structure.

[0050] Specifically, the connecting seat 31 is also provided with a first abutment block 314, which is located below the fixed locking block 313. A mounting groove 311 is formed between the first abutment block 314 and the fixed locking block 313. This mounting groove 311 provides a stable locking position and more precise positioning for the elastic locking block 222. When the bushing 22 is inserted into the connecting seat 31, the elastic locking block 222 can smoothly enter the mounting groove 311 and form a tight locking relationship with the fixed locking block 313, thereby ensuring the firmness and reliability of the connection.

[0051] The bottom of the bushing 22 is provided with a second abutment block 224, the inner sidewall of which abuts against the outer sidewall of the first abutment block 314. When the second abutment block 224 and the first abutment block 314 come into contact and form a stable support structure, this not only effectively disperses the pressure at the connection point but also prevents the second body 2 from wobbling left and right during use, thus ensuring the stability and reliability of the toothbrush head under high-frequency vibration. Regardless of the rotation angle of the toothbrush head, the engagement between the elastic locking block 222 and the fixed locking block 313 remains stable, and the interaction between the second abutment block 224 and the first abutment block 314 further enhances the stability of the connection. This not only simplifies the installation and removal process of the toothbrush head but also significantly improves the user experience, making the toothbrush head more stable during use and preventing it from affecting the cleaning effect or causing discomfort due to shaking. The second abutment block 224 surrounds the bushing 22 in a complete ring structure, ensuring that the second abutment block 224 and the fixing block 313 can always form the mounting groove 311, thus ensuring uniform support and stability of the bushing 22 in the circumferential direction. The outer wall of the second abutment block 224 is also provided with a first groove 221, and the inner side of the second body 2 is provided with a first protrusion 20. The first protrusion 20 of the second body 2 is adapted to abut and be fixed within the first groove 221 of the second abutment block 224, allowing the bushing 22 to rotate with the second body 2. This achieves a secure connection between the second body 2 and the bushing 22, and also allows the bushing 22 to rotate synchronously with the rotation of the second body 2.

[0052] Preferably, refer to Figure 4 The outer wall of the first abutment block 314 includes a first guide wall 3131, a smooth wall 3132 and a second guide wall 3133 arranged from top to bottom. The first guide wall 3131 extends arc-shaped along the central axis of the connecting seat 31 away from the connecting seat 31. The smooth wall 3132 connects the end of the first guide wall 3131 and the beginning of the second guide wall 3133 and the smooth wall 3132 is relatively parallel to the central axis of the connecting seat 31. The second guide wall 3133 extends arc-shaped along the central axis of the connecting seat 31 towards the connecting seat 31.

[0053] In this embodiment, the outer wall of the first abutment block 314 includes a first guide wall 3131, a smooth wall 3132 and a second guide wall 3133 arranged from top to bottom, which not only optimizes the insertion and removal process, but also improves the stability and service life of the connection between the entire toothbrush head and the toothbrush body 3.

[0054] Specifically, the first guide wall 3131 extends arc-shaped along the central axis of the connecting seat 31 towards the side away from the connecting seat 31. The first guide wall 3131 helps guide the elastic locking block 222 of the bushing 22 to smoothly deform and enter the mounting groove 311 of the connecting seat 31 when it is inserted, reducing resistance and friction during the insertion process and improving the convenience of insertion and removal operations. The smooth wall 3132 is connected to the end of the first guide wall 3131 and the beginning of the second guide wall 3133, and the smooth wall 3132 is relatively parallel to the central axis of the connecting seat 31, ensuring that the bushing 22 can maintain a stable position after being inserted to a certain depth, avoiding shaking or instability that may be caused by the inclination of the wall surface. The second guide wall 3133 extends in an arc along the central axis of the connecting seat 31 towards the side closer to the connecting seat 31. The second guide wall 3133 can reset the elastic block 222 on the bushing 22, ensuring that the elastic block 222 of the bushing 22 can slowly reset and insert into the mounting groove 311 of the connecting seat 31. This ensures a tight fit between the bushing 22 and the connecting seat 31, preventing the elastic block 222 from quickly resetting and impacting the connecting seat 31, further enhancing the stability and reliability of the connection. Moreover, the second guide wall 3133 can also provide additional guidance for the elastic block 222 when it moves away from the mounting groove 311, helping the elastic block 222 to smoothly generate elastic deformation and leave the mounting groove 311 when it moves away from the mounting groove 311 of the connecting seat 31, making it easier to pull out the bushing 22 from the connecting seat 31.

[0055] Furthermore, the top of the bushing 22 is also provided with a third abutment block 225. The third abutment block 225 is symmetrically arranged on the other two sides of the mounting hole 2222. The symmetry line of the third abutment block 225 is perpendicular to the symmetry line of the elastic locking block 222. The third abutment block 225 is adapted to abut against the top of the connecting seat 31.

[0056] In this embodiment, the top of the bushing 22 is also provided with a third abutment block 225. The third abutment block 225 provides additional stability and limiting functions, preventing the connecting seat 31 from passing too far through the bushing 22, thereby ensuring the stability of the connection.

[0057] Specifically, the third abutment block 225 is symmetrically arranged on both sides of the mounting hole 2222, and its line of symmetry is perpendicular to the line of symmetry of the elastic locking block 222. This vertical arrangement ensures uniform force distribution in the axial and radial directions, further enhancing the stability of the structure. The third abutment block 225 is adapted to abut against the top of the connecting seat 31. When the bushing 22 is inserted into the connecting seat 31, the contact between the third abutment block 225 and the top of the connecting seat 31 not only serves as a limit but also prevents the connecting seat 31 from excessively penetrating the bushing 22. Through the mutual abutment between the third abutment block 225 and the top of the connecting seat 31, the axial instability of the connecting seat 31 can be effectively prevented, avoiding shaking or loosening caused by over-insertion of the connecting seat 31, and improving the connection accuracy and reliability between components.

[0058] Furthermore, this application provides an electric toothbrush, including a plug-in structure for a segmented toothbrush head as described in any of the above embodiments, a segmented toothbrush head, and a toothbrush body 3. The segmented toothbrush head includes a first body 1 and a second body 2 that can rotate relative to each other. The second body 2 can be fixedly installed at any angle on the connecting seat 31 of the toothbrush body 3 via the plug-in structure. In this embodiment, through the plug-in structure, the second body 2 can be stably fixed on the connecting seat 31 of the toothbrush body 3 at any angle, avoiding the angle deviation and instability problems that may occur during the installation of the segmented toothbrush head.

[0059] Specifically, the first body 1 is equipped with a brush head assembly 11 for direct contact with teeth for cleaning; the second body 2 contains a transmission assembly 21, which can adaptably drive the drive shaft 32 of the toothbrush body to connect the brush head assembly 11 and the toothbrush body, ensuring that the brush head assembly 11 can efficiently receive power and achieve vibration function. Moreover, the relative rotation capability between the first body 1 and the second body 2 allows the user to flexibly adjust the angle of the brush head according to their oral structure and cleaning needs during use, thereby cleaning teeth and gums more effectively. No matter how the second body 2 is rotated, it can always be stably fixed on the connecting seat 31 of the toothbrush body 3 at any angle.

[0060] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A plug-in structure for a segmented toothbrush head, the segmented toothbrush head comprising a first body and a second body, the first body having a brush head assembly, and the second body having a transmission assembly suitable for drivingly connecting the brush head assembly and a drive shaft, characterized in that, include: A bushing is disposed at the end of the second body, and a pair of elastic locking blocks are provided on both sides of the bushing; A connecting seat is disposed on the top of the toothbrush body. A fixing block is provided on the outer side wall of the connecting seat. The projection of the elastic block on the connecting seat at least partially overlaps with the fixing block. During the snapping process between the bushing and the connecting seat, at least partially of the pair of elastic blocks always abut against the fixing block, so that the second body is suitable for insertion and removal from the connecting seat disposed on the toothbrush body at any angle.

2. The insertion and removal structure for a segmented toothbrush head according to claim 1, characterized in that, A pair of elastic blocks are symmetrically arranged on both sides of the bushing. The angle between the two elastic blocks and the ends of the bushing that are close to each other in the circumferential direction is the first angle. The angle between the two ends of the connecting seat that are far apart in the circumferential direction is the second angle. The first angle is smaller than the second angle, so that the circumference of the fixed block is always greater than the maximum circumference of the interval between the two elastic blocks.

3. The insertion and removal structure for a segmented toothbrush head according to claim 2, characterized in that, The first included angle is 110°-130°, and the second included angle is 150°-170°.

4. The insertion and removal structure for a segmented toothbrush head according to claim 2, characterized in that, The first included angle is 120°, the second included angle is 160°, and at least one-quarter of the fixed block always remains in contact with the elastic block.

5. The insertion and removal structure for a segmented toothbrush head according to claim 2, characterized in that, The bushing has an axially penetrating mounting hole, the connecting seat is adapted to be inserted into the mounting hole, the mounting hole has symmetrical elastic grooves on both sides, and the elastic locking block is disposed in the elastic groove.

6. A plug-in / plug-out structure for a segmented toothbrush head according to any one of claims 1-5, characterized in that, The connecting seat is also provided with a first abutting block, which is disposed below the fixing block, and an installation groove is formed between the first abutting block and the fixing block; the elastic block is adapted to be snapped into the installation groove; The bottom of the bushing is also provided with a second abutting block, and the inner sidewall of the second abutting block is adapted to abut against the first abutting block.

7. The insertion and removal structure for a segmented toothbrush head according to claim 6, characterized in that, The outer wall of the first abutment block includes a first guide wall, a smooth wall, and a second guide wall arranged from top to bottom. The first guide wall extends arc-shaped along the central axis of the connecting seat to the side away from the connecting seat. The smooth wall connects the end of the first guide wall and the beginning of the second guide wall and is relatively parallel to the central axis of the connecting seat. The second guide wall extends arc-shaped along the central axis of the connecting seat to the side closer to the connecting seat.

8. The insertion and removal structure for a segmented toothbrush head according to claim 6, characterized in that, The second abutment block is circumferentially arranged around the bushing. The outer wall of the second abutment block is also provided with a first groove, and the inner side of the second body is provided with a first protrusion. The first protrusion of the second body is adapted to abut and be fixed in the first groove of the second abutment block, so that the bushing can rotate with the second body.

9. A plug-in / plug-out structure for a segmented toothbrush head according to claim 6, characterized in that, The top of the bushing is also provided with a third abutment block, which is symmetrically arranged on the other two sides of the mounting hole. The symmetry line of the third abutment block is perpendicular to the symmetry line of the elastic locking block. The third abutment block is adapted to abut against the top of the connecting seat.

10. An electric toothbrush, characterized in that, The invention includes a plug-in structure for a segmented toothbrush head, a segmented toothbrush head, and a toothbrush body as described in any one of claims 1-9. The segmented toothbrush head includes a first body and a second body that can rotate relative to each other. The second body can be fixedly installed at any angle to the connecting seat of the toothbrush body through the plug-in structure.

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