Shaft sealing waterproof ring for high-frequency electric toothbrush motor

Abstract

The utility model relates to a shaft sealing waterproof ring for a high-frequency electric toothbrush motor, which comprises an insertion port and a penetrating port, a motor shaft is inserted from the insertion port and penetrates out from the penetrating port, a waterproof sleeve is arranged on the insertion port and is tightly attached to the motor, a first fastening groove is formed in the insertion port, a first fastening ring is clamped in the first fastening groove, and a second fastening ring is arranged in the first fastening ring. Through the tightening effect of the first fastening ring, a conical head is arranged on the inserting opening and tightly attached to a shaft of the motor, the conical head partially penetrates out of an outer shell of the toothbrush, the bottom of the conical head is partially attached to the outer shell of the toothbrush, a second fastening groove is formed in the penetrating opening, and a second fastening ring is clamped in the second fastening groove. The second fastening ring is tightly attached to the contact part of the toothbrush outer shell while ensuring that the penetrating opening is tightly attached to the shaft of the motor through the tightening effect of the second fastening ring. By means of the mechanism, water is prevented from flowing into the toothbrush shell while the water is prevented from flowing into the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rings, in particular to a shaft sealing waterproof ring for a high-frequency electric toothbrush motor. Background Art

[0002] Electric toothbrushes use the rapid vibration of the motor to generate high-frequency vibrations in the brush head, which can instantly break down the toothpaste into fine foam and deeply clean the gaps between teeth. At the same time, the vibration of the bristles can promote blood circulation in the mouth and have a massage effect on the gum tissue. However, the motor shaft is easily infiltrated by water, which may damage the internal electronic components. Therefore, there is a special need for an electric toothbrush motor shaft sealing waterproof ring that can effectively prevent water from entering and protect the motor shaft. The existing waterproof ring design may have the problem of insufficient waterproof performance. For example, there is only one sealing gasket, which is easily corroded and causes water to enter, thereby affecting its waterproof performance.

[0003] Chinese patent CN220190577U discloses a waterproof ring for sealing the motor shaft of an electric toothbrush. The working principle of this device is to insert the motor shaft of the electric toothbrush into the conical head of the waterproof ring. The conical head relies on the elasticity of the rubber material to expand and fit tightly with the motor shaft after insertion, forming a preliminary seal. The outer and inner sides of the waterproof ring are respectively provided with an outer sealing component and an inner sealing component, including multiple sealing grooves and sealing rings. These sealing rings are installed in the corresponding sealing grooves to enhance the waterproof effect. A clamping component is also provided on the inner side of the waterproof ring, including a clamping ring and a clamping spring. The clamping spring is installed on the inner side of the waterproof ring. After the clamping ring is installed, the elastic force of the clamping spring forms a good seal between the waterproof ring and the motor shaft and the outer shell. The conical head extends out of the outer shell, clamping the shell and the waterproof ring, further ensuring the waterproof effect and preventing moisture from entering the interior of the motor, thereby protecting the internal components of the electric toothbrush from damage.

[0004] The device in this patent document cannot form an effective seal with the motor, and the compression spring is not provided with a fixing mechanism. During long-term operation, high-intensity vibration may cause the compression spring to puncture the waterproof ring. Utility Model Content

[0005] In response to the above problems, a shaft sealing waterproof ring for a high-frequency electric toothbrush motor is provided, comprising an insertion port and a through-port, the motor shaft is inserted into the insertion port and passes through the through-port, the insertion port is provided with a waterproof sleeve, the waterproof sleeve is tightly fitted with the motor to prevent moisture from entering the motor, a first fastening groove is provided on the insertion port, a first fastening ring is clamped in the first fastening groove, the insertion port is tightly fitted with the motor shaft through the tightening effect of the first fastening ring, the insertion port is tightly fitted with the motor shaft to prevent moisture from entering the motor from the shaft surface, a conical head is provided on the through-port, the conical head part passes through the outer shell of the toothbrush, the bottom of the conical head is partially fitted with the outer shell of the toothbrush, a second fastening groove is provided in the through-port part, a second fastening ring is clamped in the second fastening groove, the second fastening ring ensures that the through-port is tightly fitted with the motor shaft through its tightening effect, and at the same time, it is tightly fitted with the contact part of the toothbrush outer shell, preventing moisture from flowing into the motor while preventing moisture from flowing into the toothbrush shell.

[0006] Preferably, a first sealing groove is provided on the outer side of the waterproof ring, a first sealing ring is clamped in the first sealing groove, and the first sealing ring is in contact with the inner wall of the toothbrush housing.

[0007] Preferably, a second sealing groove is provided below the first sealing groove on the waterproof ring, a second sealing ring is clamped on the second sealing groove, and the second sealing ring is tightly fitted to the inner wall of the toothbrush housing.

[0008] Preferably, a tightening mechanism is provided in the waterproof ring, which includes an upper lifting block and a lower tightening block. The upper lifting block abuts against the through-port, and the lower tightening block abuts against the insertion port. Through the limitation of the upper lifting block and the lower tightening block, it is ensured that the tapered head of the through-port passes through the toothbrush shell while the waterproof cover of the insertion port fits tightly with the motor.

[0009] Preferably, a compression spring is provided between the upper lifting block and the lower pressing block.

[0010] Preferably, a guide circular block is provided on the upper lifting block, and a guide circular groove is opened on the lower tightening block. The guide circular block is inserted into the guide circular groove. Through the mutual restriction of the guide circular block and the guide circular groove, the upper lifting block and the lower tightening block move along the axial direction of the motor shaft.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This utility model achieves a double seal between the motor shaft and the electric toothbrush housing by providing a waterproof sleeve and a first fastening ring at the insertion port, as well as a tapered head and a second fastening ring at the outlet. This effectively prevents moisture from entering the motor through the motor shaft, improving the waterproof performance of the electric toothbrush. This design is particularly suitable for high-frequency electric toothbrushes, as the high-speed rotation of the motor shaft is more prone to moisture penetration. The structure of this utility model can provide more reliable waterproof protection.

[0013] 2. The present invention adds a first sealing groove and a first sealing ring to the outer side of the waterproof ring, and further defines a second sealing groove and a second sealing ring below the first sealing groove, forming a multi-layer sealing structure. This design not only enhances the sealing effect between the waterproof ring and the electric toothbrush housing, but also provides more comprehensive waterproof protection by placing sealing rings in different positions, ensuring that the internal motor of the electric toothbrush remains dry even in high-pressure water or humid environments, thereby extending the product's service life.

[0014] 3. The present invention incorporates a guide circular block and guide circular groove design into the tightening mechanism, enabling limited movement of the upper lifting block and lower tightening block along the axial direction of the motor shaft while maintaining a stable tightening state. This structure not only improves the flexibility and adaptability of the waterproof ring installation, but also, through the guide design, ensures the stability of the waterproof ring during use of the electric toothbrush, reducing the risk of seal failure caused by vibration or axial pressure changes, thereby maintaining good waterproof performance under various usage conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a stereoscopic schematic diagram showing the insertion port perspective of a shaft sealing waterproof ring for a high-frequency electric toothbrush motor.

[0016] Figure 2 The present invention is a stereoscopic schematic diagram of a shaft sealing waterproof ring for a high-frequency electric toothbrush motor from the perspective of a through-hole.

[0017] Figure 3 It is a side view of a shaft sealing waterproof ring used in a high-frequency electric toothbrush motor.

[0018] Figure 4 It is a shaft sealing waterproof ring for high-frequency electric toothbrush motors. Figure 3 Cross-sectional view of AA in the figure.

[0019] Figure 5 The utility model is a three-dimensional schematic diagram of a tightening mechanism of a shaft sealing waterproof ring used for a high-frequency electric toothbrush motor.

[0020] Figure 6 The present invention is an exploded view of a tightening mechanism for a shaft sealing waterproof ring of a high-frequency electric toothbrush motor.

[0021] The numbers in the figure are: 1. Insertion port; 11. Waterproof cover; 12. First fastening groove; 13. First fastening ring; 2. Through port; 21. Conical head; 22. Second fastening groove; 23. Second fastening ring; 3. First sealing groove; 31. First sealing ring; 4. Second sealing groove; 41. Second sealing ring; 5. Tightening mechanism; 51. Upper lifting block; 511. Guide circular block; 52. Lower tightening block; 521. Guide circular groove; 53. Compression spring. DETAILED DESCRIPTION

[0022] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Reference Figures 1-6 :A shaft sealing waterproof ring for a high-frequency electric toothbrush motor, comprising an insertion port 1 and a through port 2. The motor shaft is inserted from the insertion port 1 and exits from the through port 2. The insertion port 1 is provided with a waterproof cover 11, which fits tightly with the motor to prevent moisture from entering the motor. The insertion port 1 is provided with a first fastening groove 12, and a first fastening ring 13 is clamped in the first fastening groove 12. Through the tightening effect of the first fastening ring 13, the insertion port 1 is tightly fitted with the motor shaft to prevent moisture from entering from the shaft surface. The motor is entered, and a conical head 21 is provided on the through-port 2. The conical head 21 partially passes through the outer shell of the toothbrush, and the bottom of the conical head 21 is partially fitted with the outer shell of the toothbrush. A second fastening groove 22 is opened in the through-port 2, and a second fastening ring 23 is clamped in the second fastening groove 22. The second fastening ring 23 not only ensures that the through-port 2 is tightly fitted with the shaft of the motor through its tightening effect, but also fits tightly with the contact part of the outer shell of the toothbrush, thereby preventing moisture from flowing into the motor and the toothbrush shell.

[0024] In the prior art, after the motor shaft is inserted into the sealing waterproof ring, the inserted part cannot fit with the motor, which may cause some water to flow in. In view of this, in the utility model, the motor shaft is inserted from the insertion port 1 of the waterproof ring and passes through the through port 2. A waterproof cover 11 is provided at the insertion port 1. The waterproof cover 11 fits tightly with the motor shaft to prevent moisture from entering the interior of the motor. In order to enhance the waterproof effect, a first fastening groove 12 is provided on the insertion port 1, and a first fastening ring 13 is clamped in the groove. The first fastening ring 13 forms a seal between the insertion port 1 and the motor shaft through its tightening effect to prevent water from entering. The through-port 2 is provided with a conical head 21, which partially passes through the outer shell of the electric toothbrush, and the bottom of the conical head 21 is in contact with the outer shell of the toothbrush to form a second waterproof barrier. The through-port 2 is partially provided with a second fastening groove 22, and a second fastening ring 23 is clamped in the second fastening groove 22. The second fastening ring 23 not only ensures that the through-port 2 is in close contact with the motor shaft through its tightening effect to prevent moisture from flowing into the motor, but also closely fits with the contact part of the toothbrush outer shell to further prevent moisture from flowing into the toothbrush shell, thereby realizing efficient waterproof sealing of the motor shaft.

[0025] Reference Figures 1-4 : A first sealing groove 3 is opened on the outside of the waterproof ring, and a first sealing ring 31 is clamped in the first sealing groove 3. The first sealing ring 31 fits the inner wall of the toothbrush shell.

[0026] A first sealing groove 3 is provided on the outside of the waterproof ring, and a first sealing ring 31 is clamped in the groove. When the waterproof ring is installed in place, the first sealing ring 31 fits tightly against the inner wall of the outer shell of the electric toothbrush, forming an additional sealing layer. In this way, even if moisture tries to enter through the gap between the waterproof ring and the outer shell, it will be effectively blocked by the first sealing ring 31, ensuring that the motor shaft and the internal motor are further protected from water, thereby enhancing the waterproof performance of the entire electric toothbrush.

[0027] Reference Figures 1-4 : A second sealing groove 4 is opened below the first sealing groove 3 on the waterproof ring, and a second sealing ring 41 is clamped on the second sealing groove 4. The second sealing ring 41 fits tightly against the inner wall of the toothbrush housing.

[0028] On the waterproof ring, a second sealing groove 4 is further opened below the first sealing groove 3 to increase the level and effect of waterproofing. A second sealing ring 41 is clamped on the second sealing groove 4. When the waterproof ring is installed on the electric toothbrush, the second sealing ring 41 also fits tightly with the inner wall of the toothbrush shell. This design not only provides waterproof protection through the first sealing ring 31 on the top of the waterproof ring, but also adds an additional sealing layer through the second sealing ring 41 below the waterproof ring. The setting of the double sealing ring ensures that the joint between the motor shaft and the shell is more strictly waterproofed, effectively preventing moisture from penetrating into the interior of the electric toothbrush, thereby improving the overall waterproof performance of the electric toothbrush and protecting the motor from damage in a humid environment.

[0029] Reference Figure 4-Figure 6 : A tightening mechanism 5 is provided in the waterproof ring, and the tightening mechanism 5 includes an upper lifting block 51 and a lower tightening block 52. The upper lifting block 51 abuts against the through-port 2, and the lower tightening block 52 abuts against the insertion port 1. Through the limitation of the upper lifting block 51 and the lower tightening block 52, it is ensured that the conical head 21 of the through-port 2 passes through the toothbrush shell while the waterproof cover 11 of the insertion port 1 is tightly fitted with the motor.

[0030] A tightening mechanism 5 is provided in the waterproof ring, which consists of an upper lifting block 51 and a lower tightening block 52. The upper lifting block 51 is against the through-hole 2 to ensure that the conical head 21 of the through-hole 2 can smoothly pass through the outer shell of the electric toothbrush. At the same time, the lower tightening block 52 is against the insertion port 1. Through the coordinated action of the upper lifting block 51 and the lower tightening block 52, not only the stability of the conical head 21 during the passing-out process is guaranteed, but also the waterproof cover 11 at the insertion port 1 is ensured to fit tightly with the motor shaft to form an effective seal, preventing moisture from entering the interior of the motor through the gap between the motor shaft and the waterproof cover 11, thereby realizing efficient waterproof sealing of the motor shaft during the use of the electric toothbrush, protecting the motor from moisture erosion, and extending the service life of the electric toothbrush.

[0031] Reference Figure 4-Figure 6A compression spring 53 is provided between the upper lifting block 51 and the lower pressing block 52.

[0032] In the tightening mechanism 5, a compression spring 53 is additionally provided between the upper lifting block 51 and the lower tightening block 52. This design enables the upper lifting block 51 and the lower tightening block 52 to be pressed against each other by the elastic force of the compression spring 53, thereby providing a continuous and stable clamping force when the conical head 21 of the through-port 2 passes through the electric toothbrush housing, and when the waterproof cover 11 of the insertion port 1 fits tightly against the motor shaft, thereby ensuring the sealing between the waterproof ring and the motor shaft and preventing moisture penetration. At the same time, the addition of the compression spring 53 also helps to alleviate the tiny gap caused by vibration or temperature change of the motor shaft, thereby enhancing the adaptability and reliability of the entire waterproof structure and ensuring that the electric toothbrush can maintain good waterproof performance under various conditions of use.

[0033] Reference Figure 4-Figure 6 : A guide circular block 511 is provided on the upper lifting block 51, and a guide circular groove 521 is opened on the lower tightening block 52. The guide circular block 511 is inserted into the guide circular groove 521. Through the mutual restriction of the guide circular block 511 and the guide circular groove 521, the upper lifting block 51 and the lower tightening block 52 move along the axial direction of the motor shaft.

[0034] In the tightening mechanism 5, a guide block 511 is provided on the upper lifting block 51, and a guide groove 521 is provided on the lower tightening block 52. The coordinated use of the guide block 511 and the guide groove 521 not only ensures the correct alignment and stable tightening between the upper lifting block 51 and the lower tightening block 52, but also allows the two to move limitedly along the axial direction of the motor shaft. This design provides a certain axial adjustment space, so that the waterproof ring can adapt to motor shafts of different lengths, ensuring that the conical head 21 can smoothly pass through the outer shell of the electric toothbrush, and at the same time, the waterproof sleeve 11 can fit tightly to the motor shaft to prevent moisture from entering. The mutual restriction of the guide block 511 and the guide groove 521 also helps to maintain the stability of the waterproof ring during the use of the electric toothbrush, reduce sealing failure caused by vibration or axial pressure changes, thereby improving the waterproof performance and service life of the electric toothbrush.

[0035] The above embodiments merely represent one or several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A shaft sealing waterproof ring for a high-frequency electric toothbrush motor, characterized in that: The invention comprises an insertion port (1) and a through-port (2). The motor shaft is inserted into the insertion port (1) and passes out of the through-port (2). The insertion port (1) is provided with a waterproof cover (11). The waterproof cover (11) is tightly fitted with the motor to prevent moisture from entering the motor. The insertion port (1) is provided with a first fastening groove (12). A first fastening ring (13) is clamped in the first fastening groove (12). Through the tightening effect of the first fastening ring (13), the insertion port (1) is tightly fitted with the motor shaft to prevent moisture from entering the motor from the shaft surface. The through-port ( 2) is provided with a conical head (21), the conical head (21) partially passes through the outer shell of the toothbrush, and the bottom of the conical head (21) is partially fitted with the outer shell of the toothbrush. The through-hole (2) is partially provided with a second fastening groove (22), and a second fastening ring (23) is clamped in the second fastening groove (22). The second fastening ring (23) ensures that the through-hole (2) is tightly fitted with the shaft of the motor through its tightening effect, and at the same time, it is tightly fitted with the contact part of the toothbrush outer shell, thereby preventing moisture from flowing into the motor and the toothbrush shell.

2. The shaft sealing waterproof ring for a high-frequency electric toothbrush motor according to claim 1, characterized in that: A first sealing groove (3) is provided on the outer side of the waterproof ring, a first sealing ring (31) is clamped in the first sealing groove (3), and the first sealing ring (31) is fitted with the inner wall of the toothbrush shell.

3. The shaft sealing waterproof ring for a high-frequency electric toothbrush motor according to claim 2, characterized in that: A second sealing groove (4) is provided below the first sealing groove (3) on the waterproof ring, a second sealing ring (41) is clamped on the second sealing groove (4), and the second sealing ring (41) is tightly fitted to the inner wall of the toothbrush housing.

4. The shaft sealing waterproof ring for a high-frequency electric toothbrush motor according to claim 1, characterized in that: A tightening mechanism (5) is provided in the waterproof ring. The tightening mechanism (5) comprises an upper lifting block (51) and a lower tightening block (52). The upper lifting block (51) abuts against the through-port (2), and the lower tightening block (52) abuts against the insertion port (1). By limiting the upper lifting block (51) and the lower tightening block (52), it is ensured that the tapered head (21) of the through-port (2) passes through the toothbrush housing while the waterproof sleeve (11) of the insertion port (1) is tightly fitted with the motor.

5. The shaft sealing waterproof ring for a high-frequency electric toothbrush motor according to claim 4, characterized in that: A compression spring (53) is provided between the upper lifting block (51) and the lower pressing block (52).

6. The shaft sealing waterproof ring for a high-frequency electric toothbrush motor according to claim 4, characterized in that: The upper lifting block (51) is provided with a guide circular block (511), and the lower pressing block (52) is provided with a guide circular groove (521). The guide circular block (511) is inserted into the guide circular groove (521). Through the mutual restriction between the guide circular block (511) and the guide circular groove (521), the upper lifting block (51) and the lower pressing block (52) move along the axial direction of the motor shaft.

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