Toothbrush head with balanced gravity center and electric toothbrush

Abstract

The utility model relates to the field of electric toothbrushes, and provides a toothbrush head with a balanced gravity center and an electric toothbrush, the toothbrush head comprises a first body, a second body and a connecting piece, a brush head assembly is installed in the first body, the brush head assembly comprises a brush head support provided with a fixing groove and a connecting groove and a bristle base, and the bristle base is fixedly arranged in the connecting groove; bristles are arranged on the bristle seat; a transmission assembly is arranged in the second body and comprises a transmission shaft suitable for being inserted into the fixing groove. The connecting piece and the bristle base are oppositely located on the two sides of the transmission shaft, and the connecting piece is oppositely located at the bottom of the bristle base. The electric toothbrush comprises a toothbrush head. The connecting piece is fixedly connected with the brush head support and the transmission shaft, the connecting piece and the bristle base are oppositely located on the two sides of the transmission shaft, and the connecting piece is oppositely located at the bottom of the bristle base, so that the gravity center of the brush head assembly is located on the central axis of the transmission assembly, the gravity center balance of the toothbrush head is better, a balancing weight does not need to be arranged, and the structure is simple.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrushes, and further to a toothbrush head with a balanced center of gravity and an electric toothbrush. Background Technology

[0002] Currently, electric toothbrush heads require high-frequency vibrations in all directions to enable the bristles to clean teeth effectively. However, due to the lightweight nature of the brush head, these high-frequency vibrations result in strong vibrations and a poor user experience. Therefore, most existing electric toothbrush heads require a counterweight to balance their center of gravity.

[0003] However, the addition of a counterweight makes the electric toothbrush's structure more complex, increasing production costs and assembly difficulty. Furthermore, the counterweight itself has a certain weight, increasing the overall weight of the electric toothbrush and potentially causing some burden for the user during use. If dirt or bacteria accumulate on the counterweight or surrounding components, it can also affect the toothbrush's hygiene, making cleaning and maintenance more difficult. Utility Model Content

[0004] To address the aforementioned technical problems, the purpose of this utility model is to provide a toothbrush head and electric toothbrush with a balanced center of gravity. The connecting piece is fixedly connected to the brush head bracket and the drive shaft, so that the drive shaft is fixedly connected to the first body and the second body. The connecting piece and the bristle seat are located on opposite sides of the drive shaft, and the connecting piece is located at the bottom of the bristle seat. This makes the center of gravity of the brush head assembly located on the central axis of the drive assembly, resulting in better balance of the toothbrush head. There is no need to set a counterweight, and the structure is simple.

[0005] To achieve the above objectives, this utility model provides a toothbrush head with a balanced center of gravity, comprising a first body, a second body, and a connector. A brush head assembly is installed in the first body. The brush head assembly includes a brush head bracket and a bristle holder. The bottom of the brush head bracket is provided with a fixing groove, and one side of the brush head bracket is provided with a connecting groove. The bristle holder is fixedly disposed in the connecting groove, and bristles are provided on the bristle holder.

[0006] The second body is adapted to be detachably installed on the toothbrush body, and the second body is provided with a transmission assembly, the transmission assembly including a transmission shaft adapted to be inserted into the fixing slot;

[0007] The connector is adapted to pass through and connect the other side of the brush head bracket and the drive shaft. The connector and the bristle seat are located opposite each other on both sides of the drive shaft, and the connector is located opposite each other at the bottom of the bristle seat, so that the center of gravity of the brush head assembly is located on the central axis of the drive assembly.

[0008] In some embodiments, the connecting groove is connected to the fixing groove, the side of the drive shaft near the bristle holder is flush with the bottom of the connecting groove, and the end of the connector is located relative to the bottom of the connecting groove.

[0009] In some embodiments, the brush head support includes a first frame and a second frame, the second frame being disposed at the bottom of the first frame, one side of the first frame being recessed inward to form the connecting groove, the top wall of the second frame being the only groove wall of the connecting groove, and the fixing groove axially penetrating the second frame and at least a portion of the fixing groove being located at the bottom of the connecting groove.

[0010] In some embodiments, the fixing groove includes a first groove and a second groove, the second groove being disposed inside the second frame, and the first groove being disposed at the bottom of the first frame and located opposite the bottom of the connecting groove.

[0011] In some embodiments, the brush holder is further provided with a first counterweight groove on the side near the first frame, and the groove wall of the first counterweight groove is fixedly connected to the first frame, so that a first counterweight cavity is formed between the first frame and the brush holder.

[0012] In some embodiments, the first frame is further provided with a plurality of second counterweight slots, which are symmetrically arranged at the bottom of the connecting slot, so that a second counterweight cavity is formed between the first frame and the brush head seat.

[0013] In some embodiments, the drive shaft is provided with a first connecting hole, and the brush head bracket is provided with a corresponding second connecting hole. The connector is adapted to pass through the first connecting hole and the second connecting hole and fix the drive shaft and the brush head bracket.

[0014] In some embodiments, the brush head bracket is provided with a positioning groove on the side away from the bristle holder, and a third connecting hole corresponding to the second connecting hole is provided on the outer side of the first body. The first body is also provided with positioning blocks around the third connecting hole, and the positioning blocks are adapted to be disposed in the positioning groove.

[0015] In some embodiments, the through-path of the connector is perpendicular to the axial direction of the second body.

[0016] According to another aspect of this application, an electric toothbrush is further provided, including any one of the toothbrush heads described in the preferred embodiments above.

[0017] Compared with the prior art, the toothbrush head and electric toothbrush with balanced center of gravity provided by this utility model have at least one of the following beneficial effects:

[0018] 1. The connector is fixedly connected to the brush head bracket and the drive shaft, so that the drive shaft is fixedly connected to the first body and the second body. The connector and the bristle seat are located on opposite sides of the drive shaft, and the connector is located at the bottom of the bristle seat. This makes the center of gravity of the brush head assembly located on the central axis of the drive assembly, resulting in better balance of the toothbrush head. No counterweight is needed, and the structure is simple.

[0019] 2. The side of the drive shaft closest to the bristle holder is kept relatively flush with the bottom of the connecting groove, ensuring that the drive shaft can pass smoothly through the connecting groove when inserted into the fixing groove, while ensuring the correct alignment between the drive shaft and the bristle holder, thereby ensuring the stability and transmission efficiency of the brush head assembly.

[0020] 3. By setting a first counterweight groove and a second counterweight groove on opposite sides of the bristle holder and the first frame, a connected first counterweight cavity and a second counterweight cavity can be formed between the bristle holder and the first frame, thereby achieving a balance of the toothbrush head weight. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a cross-sectional view of a toothbrush head with a balanced center of gravity.

[0023] Figure 2 This is a structural diagram of the brush head support;

[0024] Figure 3 This is a structural diagram of the brush holder;

[0025] Figure 4 This is the installation diagram for the positioning block.

[0026] Explanation of icon numbers:

[0027] First body 1, brush head assembly 11, brush head bracket 111, first frame 1111, second frame 1112, connecting groove 1113, second counterweight groove 1114, positioning groove 1115, bristle holder 112, fixing groove 1122, first counterweight groove 1123, bristles 113, connector 12, positioning block 13.

[0028] Second body 2, transmission component 21, transmission shaft 211. Detailed Implementation

[0029] 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.

[0030] 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."

[0031] 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.

[0032] 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.

[0033] 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.

[0034] refer to Figures 1 to 3This application provides a center-of-gravity balanced toothbrush head, including a first body 1, a second body 2, and a connector 12. The first body 1 houses a brush head assembly 11, which includes a brush head bracket 111 and a bristle holder 112. The bottom of the brush head bracket 111 has a fixing groove 1122, and one side of the brush head bracket 111 has a connecting groove 1113. The bristle holder 112 is fixedly disposed in the connecting groove 1113 and has bristles 113 on it. The second body 2 is adapted to be detachably installed on the toothbrush body. The second body 2 houses a transmission assembly 21, which includes a transmission shaft 211 adapted to be inserted into the fixing groove 1122. The connector 12 is adapted to pass through and connect the other side of the brush head bracket 111 and the transmission shaft 211. The connector 12 and the bristle holder 112 are located on opposite sides of the transmission shaft 211, and the connector 12 is located at the bottom of the bristle holder 112, so that the center of gravity of the brush head assembly 11 is located on the central axis of the transmission assembly 21.

[0035] In this embodiment, the connector 12 is fixedly connected to the brush head bracket 111 and the drive shaft 211, so that the drive shaft 211 is fixedly connected to the first body 1 and the second body 2. The connector 12 and the bristle seat 112 are located on opposite sides of the drive shaft 211 and the connector 12 is located at the bottom of the bristle seat 112, so that the center of gravity of the brush head assembly 11 is located on the central axis of the drive assembly 21, the center of gravity of the toothbrush head is better balanced, there is no need to set a counterweight, and the structure is simple.

[0036] Specifically, the toothbrush head of this application is a segmented toothbrush head. The drive shaft 211 is fixedly connected to the brush head bracket 111, so that the first body 1 and the second body are segmentedly connected. Specifically, the brush head assembly 11 in the first body 1 is connected to the drive shaft of the toothbrush body through the drive assembly 21 in the second body 2, so that the drive shaft is directly connected to the brush head assembly 11 through the drive assembly 21. The second body 2 does not vibrate. At this time, the second body 2 can be tightly fitted to the toothbrush body, improving the waterproof performance of the electric toothbrush and reducing the generation of limescale. Moreover, the second body 2 does not vibrate, avoiding numbness of the lips or mouth caused by the second body 2, thus improving the user experience.

[0037] The first body 1 houses a brush head assembly 11. The brush head assembly 11 includes a brush head bracket 111 and a bristle holder 112. The bottom of the brush head bracket 111 has a fixing groove 1122 for engaging with the drive shaft 211 of the transmission assembly 21. One side of the brush head bracket 111 has a connecting groove 1113, within which the bristle holder 112 is fixedly disposed. Bristles 113 are evenly distributed on the bristle holder 112 for cleaning. The second body 2 houses a transmission assembly 21. The transmission assembly 21 includes a drive shaft 211, which can be inserted into the fixing groove 1122 at the bottom of the brush head bracket 111 in the first body 1, thus achieving a transmission connection between the first body 1 and the second body 2. The connector 12 plays a crucial role in connecting the drive shaft 211 and the brush head bracket 111, passing through and connecting the other side of the brush head bracket 111 and the drive shaft 211. The connector 12 and the bristle holder 112 are located opposite each other on the drive shaft 211, with the connector 12 positioned at the bottom of the bristle holder 112. This ensures that the center of gravity of the brush head assembly 11 falls precisely on the central axis of the drive assembly 21, thus balancing and optimizing the toothbrush head's center of gravity and effectively avoiding the need for counterweights in traditional electric toothbrushes due to center of gravity shift. Because the bristles 113 are mounted on the bristle holder 112 and are positioned away from the drive shaft 211, the connector 12, positioned at the bottom of the bristle holder 112, effectively counteracts the torque generated by the weight of the bristle holder 112, maintaining the stability and balance of the toothbrush head. The mass distribution of the bristle holder 112 and the connector 12 forms a symmetrical structure. Utilizing the principle of mechanical balance, the overall center of gravity of the brush head assembly 11 is naturally concentrated on the central axis of the drive shaft 211, eliminating the need for additional counterweights. This not only improves the stability of the toothbrush head during use but also helps reduce vibration or swaying caused by uneven weight distribution, ensuring comfort and cleaning effectiveness during brushing. Furthermore, the weightless structure not only simplifies the internal construction of the toothbrush head, reducing production costs and assembly difficulty, but also lightens the overall weight of the toothbrush head, making it more convenient and comfortable to use. Because there is no need for a counterweight, the size and weight of the toothbrush head are effectively controlled, making the toothbrush more compact and lightweight, easier to carry and use. At the same time, the simplified structure also reduces the difficulty of cleaning and maintenance, making it easier and faster for users to replace brush heads or clean the toothbrush, further enhancing the user experience. Moreover, the integrated connection of connector 12 enhances the overall structural stability of the toothbrush head, reducing the risk of malfunctions due to loose or worn parts, thereby improving the toothbrush's lifespan and reliability.

[0038] It is worth noting that the connector 12 includes a pin, but it includes, but is not limited to, pins; it can also include other fixing structures such as post pins and positioning pins. The specific structure of the pin is not further limited in this application; it can be a cylindrical pin, a conical pin, or a cotter pin, etc. Simultaneously, balancing the center of gravity of the toothbrush head is to reduce the centrifugal force when the brush head vibrates or oscillates, thereby reducing the vibration sensation and improving the user experience. In traditional designs, the uneven weight distribution of the bristles 113 causes the center of gravity to deviate from the central axis, resulting in irregular oscillations and strong vibrations. By placing the bristle holder 112 and the connector 12 on opposite sides of the drive shaft 211, and positioning the connector 12 at the bottom of the bristle holder 112, the center of gravity of the brush head assembly 11 is brought as close as possible to the central axis of the drive shaft 211, effectively reducing centrifugal force and improving the stability and comfort of the brush head.

[0039] Furthermore, the connecting groove 1113 is connected to the fixing groove 1122, the side of the drive shaft 211 near the brush holder 112 is flush with the bottom of the connecting groove 1113, and the end of the connector 12 is located at the bottom of the connecting groove 1113.

[0040] In this embodiment, the side of the drive shaft 211 near the bristle holder 112 is relatively flush with the bottom of the connecting groove 1113, ensuring that the drive shaft 211 can pass smoothly through the connecting groove 1113 when inserted into the fixing groove 1122, while ensuring the correct alignment between the drive shaft 211 and the bristle holder 112, thereby ensuring the stability and transmission efficiency of the brush head assembly 11.

[0041] Specifically, the end of the connector 12 is precisely positioned relative to the bottom of the connecting groove 1113, enabling the connector 12 to effectively connect the brush head holder 111 and the drive shaft 211, forming a robust connection. This not only enhances the structural strength of the toothbrush head, simplifies the assembly process, and improves production efficiency, but also helps ensure the stability of the brush head assembly 11 during operation, reducing the risk of component loosening or damage due to vibration or impact. Furthermore, the brush head holder 111 includes a first frame 1111 and a second frame 1112. The second frame 1112 is located at the bottom of the first frame 1111. One side of the first frame 1111 is recessed inward to form the connecting groove 1113. The top wall of the second frame 1112 is the only wall of the connecting groove 1113. The fixing groove 1122 axially penetrates the second frame 1112, and at least a portion of the fixing groove 1122 is located at the bottom of the connecting groove 1113. The fixing groove 1122 includes a first groove and a second groove. The second groove is disposed inside the second frame 1112, and the first groove is disposed at the bottom of the first frame 1111 and is located opposite to the bottom of the connecting groove 1113.

[0042] It is worth noting that the bristle holder 112 and the brush head support 111 are connected by ultrasonic welding, so the brush head assembly 11 and the brush head support 111 can be regarded as a whole. The penetrating direction of the connector 12 is perpendicular to the axial direction of the second body 2. The connector 12 is located at the bottom of the brush head support 111. The connector 12 acts as a counterweight to a certain extent, so that the center of gravity of the brush head assembly 11 matches the axis of the transmission component 21, making the center of gravity of the brush head assembly 11 more balanced and the vibration of the brush head assembly 11 more regular and orderly.

[0043] Furthermore, the brush holder 112 is provided with a first counterweight groove 1123 on the side near the first frame 1111. The groove wall of the first counterweight groove 1123 is fixedly connected to the first frame 1111, so that a first counterweight cavity is formed between the first frame 1111 and the brush holder 112. The first frame 1111 is also provided with a plurality of second counterweight grooves 1114, which are symmetrically arranged at the bottom of the connecting groove 1113, so that a second counterweight cavity is formed between the first frame 1111 and the brush head holder.

[0044] In this embodiment, by providing a first counterweight groove 1123 and a second counterweight groove 1114 on the opposite side of the bristle holder 112 and the first frame 1111, a connected first counterweight cavity and a second counterweight cavity can be formed between the bristle holder 112 and the first frame 1111, thereby achieving a balance of toothbrush head weight.

[0045] Specifically, by providing a first counterweight groove 1123 and a second counterweight groove 1114 on opposite sides of the bristle holder 112 and the first frame 1111, a first counterweight cavity and a second counterweight cavity can be formed between the bristle holder 112 and the first frame 1111, thereby achieving weight balance. This helps reduce vibration or swaying caused by uneven weight distribution, ensuring comfort and cleaning effectiveness during brushing. It also helps improve the overall performance and durability of the toothbrush head because it reduces unnecessary stress and wear between components. Furthermore, by changing the weight distribution of the brush head support 111 and the bristle holder 112, the center of gravity of the toothbrush head can be matched with the central axis of the drive shaft 211, thereby improving the stability and balance of the toothbrush head.

[0046] It is worth noting that the first counterweight groove 1123 and the second counterweight groove 1114 are provided on the opposite side of the bristle holder 112 and the first frame 1111, which can reduce the weight of the toothbrush head and make its vibration stronger.

[0047] Further, refer to Figure 1 and Figure 4The drive shaft 211 has a first connecting hole, and the brush head bracket 111 has a corresponding second connecting hole. The connector 12 is adapted to pass through the first connecting hole and the second connecting hole and fix the drive shaft 211 and the brush head bracket 111. The brush head bracket 111 also has a positioning groove 1115 on the side away from the bristle holder 112. The outer side of the first body 1 has a third connecting hole corresponding to the second connecting hole. The first body 1 also has a positioning block 13 around the third connecting hole. The positioning block 13 is adapted to be set in the positioning groove 1115.

[0048] Specifically, the drive shaft 211 has a first connecting hole, while the brush head holder 111 has a corresponding second connecting hole. The connector 12 passes through these two connecting holes, thereby achieving a fixed connection between the drive shaft 211 and the brush head holder 111. This not only ensures the stability of the internal structure of the toothbrush head but also provides precise guidance and positioning for the drive shaft 211, ensuring its smooth operation during work. It also ensures the correct alignment between the drive shaft 211 and the brush head holder 111, thereby improving the working accuracy of the toothbrush head. A positioning groove 1115 is also provided on the side of the brush head holder 111 away from the bristle base 112. This design provides a corresponding positioning structure for the third connecting hole on the outer side of the first body 1. Positioning blocks 13 are also provided around the third connecting hole on the first body 1, and the positioning blocks 13 are adapted to be placed within the positioning groove 1115. This design further enhances the overall structural stability and accuracy of the toothbrush head by establishing a precise positioning relationship between the first body 1 and the brush head holder 111.

[0049] It is worth noting that the connection 12 and the positioning block 13 enhance the stability of the brush head assembly 11 and the first body 1, reducing vibration and swaying that may occur during operation.

[0050] Furthermore, this application provides an electric toothbrush, including the toothbrush head in any of the above embodiments.

[0051] 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 toothbrush head with a balanced center of gravity, characterized in that, include: A first body, wherein a brush head assembly is installed in the first body, the brush head assembly includes a brush head bracket and a bristle seat, the bottom of the brush head bracket is provided with a fixing groove, one side of the brush head bracket is provided with a connecting groove, the bristle seat is fixedly disposed in the connecting groove, and the bristle seat is provided with bristles; A second body, adapted to be detachably installed on the toothbrush body, the second body having a transmission assembly inside, the transmission assembly including a transmission shaft adapted to be inserted into the fixing slot; A connector adapted to pass through and connect the other side of the brush head bracket and the drive shaft, wherein the connector and the bristle seat are located opposite each other on both sides of the drive shaft and the connector is located opposite each other at the bottom of the bristle seat, such that the center of gravity of the brush head assembly is located on the central axis of the drive assembly.

2. A toothbrush head with a balanced center of gravity according to claim 1, characterized in that, The connecting groove is connected to the fixing groove, the side of the drive shaft near the bristle seat is flush with the bottom of the connecting groove, and the end of the connector is located at the bottom of the connecting groove.

3. A toothbrush head with a balanced center of gravity according to claim 2, characterized in that, The brush head bracket includes a first frame and a second frame. The second frame is disposed at the bottom of the first frame. One side of the first frame is recessed inward to form the connecting groove. The top wall of the second frame is the only groove wall of the connecting groove. The fixing groove axially penetrates the second frame and at least part of the fixing groove is located at the bottom of the connecting groove.

4. A toothbrush head with a balanced center of gravity according to claim 3, characterized in that, The fixing groove includes a first groove and a second groove. The second groove is disposed inside the second frame, and the first groove is disposed at the bottom of the first frame and is located opposite to the bottom of the connecting groove.

5. A toothbrush head with a balanced center of gravity according to claim 3, characterized in that, The brush holder is also provided with a first counterweight groove on the side near the first frame. The groove wall of the first counterweight groove is fixedly connected to the first frame, so that a first counterweight cavity is formed between the first frame and the brush holder.

6. A center-of-gravity balanced toothbrush head according to any one of claims 3 or 5, characterized in that, The first frame is also provided with a plurality of second counterweight slots, which are symmetrically arranged at the bottom of the connecting slot, so that a second counterweight cavity is formed between the first frame and the brush head seat.

7. A toothbrush head with a balanced center of gravity according to claim 1, characterized in that, The drive shaft is provided with a first connecting hole, and the brush head bracket is provided with a corresponding second connecting hole. The connector is adapted to pass through the first connecting hole and the second connecting hole and fix the drive shaft and the brush head bracket.

8. A toothbrush head with a balanced center of gravity according to claim 7, characterized in that, The brush head bracket is provided with a positioning groove on the side away from the bristle holder. The outer side of the first body is provided with a third connecting hole corresponding to the second connecting hole. The first body is also provided with a positioning block around the third connecting hole. The positioning block is adapted to be set in the positioning groove.

9. A toothbrush head with a balanced center of gravity according to claim 1, characterized in that, The penetrating direction of the connector is perpendicular to the axial direction of the second body.

10. An electric toothbrush, characterized in that, Includes a center-of-gravity balanced toothbrush head as described in any one of claims 1-9.

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