Shell assembly and electric toothbrush
By designing the mating structure between the assembly groove and the limit part in the housing assembly of the electric toothbrush, the problem of easy rotation of the end cap and the housing connection is solved, and a more stable connection is achieved to prevent the end cap from falling off.
Patent Information
- Application Number
- CN202421158470.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-05-24
AI Technical Summary
In the housing assembly of existing electric toothbrushes, the connection between the end cover and the housing is prone to relative rotation, resulting in loosening of the end cover.
A housing assembly is designed. By providing an assembly groove on the outer wall of the mounting part of the end cover, it cooperates with the limiting part of the inner wall of the housing. The assembly groove includes an introduction groove and a limiting groove. A locking structure is provided in the introduction groove, and the limiting part is snapped into the limiting groove, so that the housing assembly and the housing cannot rotate under the action of external force.
It effectively prevents the relative rotation of the end cap and the housing, enhances the stability of the connection, and avoids the risk of the end cap falling off.
Smart Images
Figure CN222566002U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric toothbrushes, in particular to a shell component and an electric toothbrush. Background Art
[0002] An electric toothbrush relies on electricity to make the brush head vibrate. The rapid rotation or vibration of the motor core causes the brush head to produce high-frequency vibrations, instantly breaking down the toothpaste into fine foam and deeply cleaning 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.
[0003] An electric toothbrush generally includes a brush head and a shell, inside of which a power assembly for driving the brush head to vibrate is installed. In the power supply system of the power assembly, some are charged by plugging in a wire, while others are charged by replacing batteries. In electric toothbrushes that are charged by replacing batteries, a detachable end cap is provided on the shell to replace the battery when the battery is out of power, and the end cap is reinstalled after the battery is replaced; however, in the prior art, the detachable end cap is usually fixed to the shell by providing mutually matching threads on the shell and the end cap and tightening them by rotation, but this connection method cannot limit the mutual rotation of the end cap and the shell, and the end cap is prone to loosening over time. Utility Model Content
[0004] The main purpose of the utility model is to provide a shell assembly and an electric toothbrush, aiming to solve the problem that relative rotation is easy to occur when the end cover and the shell are connected in the shell assembly.
[0005] To achieve the above-mentioned purpose, the utility model proposes a shell assembly, including: a shell and an end cover, the shell having a accommodating cavity, one end of the shell being provided with a mounting port connected to the accommodating cavity, the inner wall surface of the accommodating cavity close to the mounting port being provided with a limiting portion; the end cover is detachably covered on the mounting port, the end cover having a mounting portion inserted from the mounting port into the accommodating cavity, the outer peripheral surface of the mounting portion being provided with an assembly groove; the assembly groove comprising an introduction groove and a limiting groove connected to each other, the introduction groove having a slot for the limiting portion to enter and exit, the limiting groove being provided on one side of the introduction groove in the rotation direction of the end cover, the limiting groove being provided with a limiting protrusion on the side of the limiting groove close to the introduction groove, the limiting protrusion being used to limit the limiting portion within the limiting groove.
[0006] In one embodiment, at least two assembly grooves are provided along the circumference of the end cover, and at least two limiting portions are provided correspondingly. When the end cover is covered on the installation opening, the limiting portions are inserted into the assembly grooves one by one.
[0007] In one embodiment, buffer portions are provided on both sides of the limiting protrusion in the rotation direction of the end cover, and the buffer portions have a slope extending obliquely from the top of the limiting protrusion to the bottom of the limiting groove.
[0008] In one embodiment, the shell assembly also includes an electrical connection assembly installed on the end cover, the electrical connection assembly includes an electrical connection sheet and an elastic member fixedly installed on the electrical connection sheet; the electrical connection sheet includes a first sheet body arranged at the bottom of the mounting portion and a second sheet body bent from the first sheet body to the top of the mounting portion, and the second sheet body is provided with a snap-fitting portion at one end away from the first sheet body, and the snap-fitting portion is snap-fitted to the top edge of the mounting portion; the elastic member is fixedly installed on the first sheet body.
[0009] In one embodiment, a connector groove is provided on the inner side wall of the mounting portion, and the second sheet is disposed in the connector groove.
[0010] In one embodiment, a notch is further provided on the top of the mounting portion and matches the shape of the buckling portion. The position of the notch corresponds to the top of the connector groove, and the buckling portion buckles with the notch.
[0011] In one embodiment, a positioning portion is provided at the bottom of the mounting portion, a positioning hole corresponding to the positioning portion is provided on the first sheet, and the positioning portion is passed through the positioning hole.
[0012] In one embodiment, the limiting portion is provided with two limiting blocks spaced apart along the circumferential direction, and when the end cover is covered on the mounting opening, the outer side wall of the limiting block abuts against the inner side wall of the introduction groove.
[0013] In one embodiment, a sealing groove is further provided on the outer side of the mounting portion, a sealing member is provided in the sealing groove, and the sealing member is used to seal the mounting portion and the housing.
[0014] The utility model also proposes an electric toothbrush, comprising: a shell assembly, a brush head and a power assembly as described in any one of the above items; the brush head is arranged at one end of the shell away from the mounting port; the power assembly is installed in the accommodating cavity, and the power assembly passes through the shell and drives the brush head.
[0015] The utility model provides an end cover in the shell assembly so as to be detachably connected with the shell, and provides an assembly groove on the outer wall of the mounting portion of the end cover, which cooperates with a limiting portion provided on the inner wall of the shell, wherein the assembly groove includes an introduction groove and a limiting groove, and a locking structure is provided in the introduction groove, so that the limiting portion provided on the inner wall of the shell is inserted into the limiting groove along the assembly groove, so that the shell assembly and the shell cannot rotate relative to each other under the action of external forces within a certain range, and are locked in the assembly groove, so that the shell assembly is not easy to fall out of the shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0017] Figure 1 A schematic structural diagram of an embodiment of a housing assembly provided by the utility model;
[0018] Figure 2 A schematic structural diagram of an embodiment of an end cover provided by the utility model;
[0019] Figure 3 This is a schematic structural diagram of another embodiment of the end cover provided by the utility model.
[0020] Description of Figure Numbers:
[0021] 100. Shell assembly; 1. Shell; 11. Accommodating cavity; 111. Limiting portion; 2. End cover; 21. Mounting portion; 211. Connector slot; 212. Sealing slot; 22. Assembly slot; 221. Introducing slot; 222. Limiting slot; 223. Limiting protrusion; 23. Electrical connection assembly; 231. First sheet; 232. Second sheet.
[0022] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0026] The utility model provides a housing assembly 100 .
[0027] See also Figure 1-3 In one embodiment of the utility model, the shell assembly 100 includes a shell 1 and an end cover 2, the shell 1 has a accommodating cavity 11, one end of the shell 1 is provided with a mounting port communicating with the accommodating cavity 11, and the inner wall surface of the accommodating cavity 11 close to the mounting port is provided with a limiting portion 111; the end cover 2 is detachably covered on the mounting port, the end cover 2 has a mounting portion 21 inserted from the mounting port into the accommodating cavity 11, and the outer peripheral surface of the mounting portion 21 is provided with an assembly groove 22; the assembly groove 22 includes an introduction groove 221 and a limiting groove 222 that are connected to each other, the introduction groove 221 has a groove for the limiting portion to enter and exit, the limiting groove 222 is provided on one side of the introduction groove 221 in the rotation direction of the end cover, and the limiting groove 222 is provided with a limiting protrusion 223 on the side close to the introduction groove 221, and the limiting protrusion 223 is used to limit the limiting portion in the limiting groove 222.
[0028] In the present embodiment, when the end cover 2 is in use, in addition to the mounting portion 21 disposed in the shell 1, a portion of the end cover 2 is exposed on the outside of the electric toothbrush shell 1 for providing a force point for disassembly, and the mounting portion 21 is disposed in the electric toothbrush shell 1, and is fixed with the limiting portion 111 on the inner wall of the shell 1, and a mounting cavity is provided on the inner side of the mounting portion 21 of the end cover 2 for installing the electrical connection component 23, and an assembly groove 22 is provided on the outer side for fixing with the shell 1 of the electric toothbrush, and one or more assembly grooves 22 may be provided, and the assembly groove 22 is provided with a limiting protrusion 223, which can limit and lock the shell component 100 and the shell 1 after the shell component 100 is assembled with the shell 1, thereby limiting the rotation between the shell component 100 and the electric toothbrush shell 1, and preventing the end cover 2 from falling off due to gravity or continuous shaking during use during daily use. In this embodiment, an electrical connection assembly 23 is installed in the mounting cavity of the end cap 2. The electrical connection assembly 23 is used to electrically connect to the power assembly installed inside the housing 1, and together with the power assembly, form a current loop to drive the electric toothbrush head to vibrate. The introduction groove 221 extends axially from the top of the mounting portion 21 to the base by a first preset distance, and the limiting groove 222 extends circumferentially from the end of the introduction groove 221 by a second preset distance. When installing the shell assembly 100 and the electric toothbrush shell 1, the introduction groove 221 is used to introduce the limiting portion 111 provided on the inner wall of the electric toothbrush shell 1 into the groove 221, so that it enters the assembly groove 22 from the opening of the assembly groove 22. The introduction groove 221 is connected with the end of the limiting groove 222. The limiting portion 111 slides from the entrance of the introduction groove 221 to its end and then enters the limiting groove 222. The limiting groove 222 is provided on the outer wall of the mounting portion 21 and extends axially. At this time, the relative movement of the shell 1 and the end cover 2 is converted from relative sliding to relative rotation. The limiting portion 111 slides along the trajectory of the limiting groove 222 until it slides to the end of the limiting groove 222.
[0029] The technical solution of the utility model adopts a shell assembly 100 including a shell 1 and an end cover 2, wherein the shell 1 has a housing cavity 11, a mounting port connected to the housing cavity 11 is arranged at one end of the shell 1, and a limiting portion 111 is arranged on the inner wall surface of the housing cavity 11 near the mounting port, so that the end cover 2 can be detachably covered on the mounting port. The technical solution of the utility model also provides a mounting portion 21 inserted from the mounting port into the housing cavity 11 on the end cover 2, and an assembly groove 22 is arranged on the outer peripheral surface of the mounting portion 21, the assembly groove 22 cooperates with the limiting portion 111 inside the shell 1, and an introduction groove 221 and a limiting groove 222 are arranged in the assembly groove 22, and the limiting portion 111 arranged on the inner wall of the shell 1 is inserted into the limiting groove 222 along the introduction groove 221, so that the shell assembly 100 and the shell 1 cannot rotate relative to each other under the action of a certain range of external force, and are locked in the assembly groove 22, so that the shell assembly 100 is not easy to escape from the shell 1.
[0030] In one embodiment, at least two assembly grooves 22 are provided along the circumference of the end cover 2, and at least two limiting portions 111 are provided correspondingly. When the end cover 2 covers the installation opening, the limiting portions 111 are inserted into the assembly grooves 22 one by one. The more the number of assembly grooves 22, the higher the stability between the end cover 2 and the shell 1, and the more uniform the force on the end cover 2 and the shell 1. When the outer wall space of the installation portion 21 allows, the number of assembly grooves 22 can be increased according to actual use conditions to increase the stability of the end cover 2 and the shell 1.
[0031] In one embodiment, the two sides of the limiting protrusion 223 in the rotation direction of the end cover 2 have buffer parts, and the buffer parts have a slope extending obliquely from the top of the limiting protrusion 223 to the bottom of the limiting groove 222. The height of the protrusion is slightly higher than the height of the bottom of the groove, so that after the limiting part 111 arranged on the inner wall of the housing 1 reaches the end of the limiting groove 222, due to the existence of the protrusion, the depth of the limiting groove 222 at this place becomes shallower. When the limiting part 111 moves toward the protrusion, the height of the protrusion will limit the passing of the limiting part 111. Under the action of less than a certain external force, the limiting part 111 will be limited by the protrusion and cannot pass. The two sides of the protrusion extend from the top of the protrusion to the bottom of the limiting groove 222 to form a buffer part, and the buffer part has a certain slope. When the battery needs to be replaced, the slope can facilitate the assembly and disassembly of the housing assembly 100. When the electric toothbrush end head is rotated and force is applied, the limiting part 111 can be more easily assembled and disassembled through the locking structure.
[0032] In one embodiment, the housing assembly 100 further comprises an electrical connection assembly 23 mounted on the end cap 2, the electrical connection assembly 23 comprising an electrical connection sheet and an elastic member fixedly mounted on the electrical connection sheet; the electrical connection sheet comprises a first sheet 231 disposed at the bottom of the mounting portion 21 and a second sheet 232 bent from the first sheet 231 to the top of the mounting portion 21, a buckling portion is provided at one end of the second sheet 232 away from the first sheet 231, the buckling portion buckles with the top edge of the mounting portion 21; the elastic member is fixedly mounted on the first sheet 231. The electrical connection assembly 23 is used to connect with the circuit assembly in the housing 1 to form a current path so that the electric toothbrush works under the action of electricity. The elastic member is a spring, and a plurality of clips are provided on the first sheet 231. The end of the spring is buckled into the clip, and the spring can be fixed on the first sheet 231. When the housing assembly 100 is assembled to the housing 1, the spring abuts against the power assembly in the housing 1. At this time, the spring is in a compressed state. The compression force of the spring can keep the elastic member in continuous contact with the power assembly to avoid disconnection and thus causing the electric toothbrush to fail to work. The second sheet 232 can be formed integrally with the first sheet 231 by bending, or can be connected and fixed by welding. The top of the second sheet 232 is bent outward and downward to form a buckle. Since the second sheet 232 also needs to be electrically connected to the power assembly, the setting of the buckle can always fix the second sheet 232 to the top of the installation cavity, thus avoiding the electric toothbrush failing to work properly due to the axial displacement of the second sheet 232 during use.
[0033] In one embodiment, the inner side wall of the mounting portion 21 is provided with a connector groove 211, and the second sheet 232 is disposed in the connector groove 211. The connector groove 211 can further limit the second sheet 232, so that the second sheet 232 can fit the side wall of the mounting groove without occupying too much space in the mounting groove, and can limit the second sheet 232 to avoid poor contact with the power assembly.
[0034] In one embodiment, the top of the mounting portion 21 is also provided with a notch that matches the shape of the snap-fitting portion, and the position of the notch corresponds to the top of the connector groove 211, and the snap-fitting portion snaps into the notch. The connector groove 211 includes groove walls that are spaced apart along the circumference, and the groove walls are used to limit the displacement of the second sheet 232 along the circumference and radial directions. The notch is used to limit the axial displacement of the snap-fitting portion, so that the snap-fitting portion is limited in the notch. The connector groove 211 cooperates with the notch to enable the second sheet 232 to be completely fixed in the mounting groove, thereby ensuring the electrical connection between the electrical connection piece and other circuit components. In other embodiments, in order to save the production cost of the end cover 2, the notch may not be dug, and the snap-fitting portion may be limited by using a colloid to adhere the snap-fitting portion to the outer wall of the mounting groove, or no limiter is provided, and the displacement of the snap-fitting portion may be limited to a certain extent by relying on the strength of the connecting piece groove and the electrical connection piece itself.
[0035] In one embodiment, a positioning portion is provided at the bottom of the mounting portion 21, and a positioning hole corresponding to the positioning portion is provided on the first sheet 231, and the positioning portion is inserted into the positioning hole. A plurality of positioning portions are provided, and when the positioning holes are inserted into the plurality of positioning portions, the displacement of the first sheet 231 can be limited, and the rotation of the first sheet 231 can also be limited. The electrical connection component 23 can be limited in the end cover 2 by cooperating with the connector groove 211 and the notch without using adhesive.
[0036] In one embodiment, the limiting portion 111 is provided with two limiting blocks at intervals along the circumferential direction. When the end cover 2 is covered on the installation opening, the outer wall of the limiting block abuts against the inner wall of the introduction groove 221. The limiting protrusions are arranged at intervals so that the width of the limiting portion 111 can be slightly adjusted within a certain distance. When the electric toothbrush works at different temperatures, the limiting portion 111 may expand or contract slightly due to thermal expansion and contraction, which may cause the limiting portion 111 to be unable to be inserted into the assembly groove 22. In this case, the intervals between the limiting protrusions reserve space for the limiting portion 111 to be adjusted. The limiting protrusions can be relatively close or far away to adapt to different temperature conditions, so that the limiting portion 111 can be inserted into the assembly groove 22.
[0037] In one embodiment, the outer side of the mounting portion 21 further has a sealing groove 212, and a sealing member is provided in the sealing groove 212, and the sealing member is used to seal the mounting portion with the housing. The sealing groove 212 can fill the gap between the end cover 2 and the housing 1 when the housing assembly 100 is matched with the electric toothbrush housing 1, thereby preventing water vapor from entering and causing internal circuit failure, and playing the role of isolating water vapor.
[0038] The utility model also proposes an electric toothbrush, comprising: a shell assembly 100, a brush head and a power assembly as described in any one of the above; the brush head is arranged at one end of the shell away from the mounting port; the power assembly is installed in the accommodating cavity, the power assembly passes through the shell and drives the brush head; the specific structure of the shell assembly 100 refers to the above embodiment. Since the electric toothbrush adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the brush head is arranged at one end of the shell 1; the power assembly is fixedly installed in the shell 1, and the power assembly passes through the shell 1 to drive the brush head; the end cover 2 is detachably installed at the end of the shell 1 away from the brush head, and the shell 1 is sleeved on the outside of the mounting portion 21. The power component is connected to the brush head outside the shell 1 through a preset hole on the shell 1 through its own output shaft, driving the brush head to rotate or vibrate. The shell component 100 is detachably arranged at the other end to facilitate replacement of the battery of the electric toothbrush; the shell 1 is connected with the end cover 2 to ensure that when water flows down the outer wall of the shell 1, since the top surface of the end cover 2 is higher than the horizontal plane of the gap at the connection, water will not enter the shell 1 through the gap at the connection, but will continue to flow naturally along the outer wall of the end cover 2, thereby better protecting the electronic components in the electric toothbrush.
[0039] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A housing assembly for an electric toothbrush, characterized in that: include: A shell body having a receiving cavity, one end of the shell body being provided with a mounting opening communicating with the receiving cavity, and an inner wall surface of the receiving cavity close to the mounting opening being provided with a limiting portion; An end cover is detachably covered on the mounting opening, the end cover has a mounting portion which is inserted from the mounting opening into the accommodating cavity, and an outer peripheral surface of the mounting portion is provided with a mounting groove; The assembly groove includes an introduction groove and a limiting groove which are interconnected, the introduction groove has a groove opening for the limiting portion to enter and exit, the limiting groove is arranged on one side of the introduction groove in the rotation direction of the end cover, and a limiting protrusion is provided on the side of the limiting groove close to the introduction groove, and the limiting protrusion is used to limit the limiting portion within the limiting groove.
2. The housing assembly according to claim 1, wherein: At least two assembly grooves are arranged along the circumference of the end cover, and at least two limiting portions are arranged correspondingly. When the end cover is covered on the installation opening, the limiting portions are inserted into the assembly grooves one by one.
3. The housing assembly according to claim 1, wherein: Buffer portions are provided on both sides of the limiting protrusion in the rotation direction of the end cover, and the buffer portions have a slope extending obliquely from the top of the limiting protrusion to the bottom of the limiting groove.
4. The housing assembly according to claim 1, wherein: The shell assembly also includes an electrical connection assembly installed on the end cover, the electrical connection assembly includes an electrical connection sheet and an elastic member fixedly installed on the electrical connection sheet; the electrical connection sheet includes a first sheet body arranged at the bottom of the mounting portion and a second sheet body bent from the first sheet body to the top of the mounting portion, and a snap-fitting portion is provided at one end of the second sheet body away from the first sheet body, and the snap-fitting portion is snapped on the top edge of the mounting portion; the elastic member is fixedly installed on the first sheet body.
5. The housing assembly according to claim 4, characterized in that: The inner side wall of the mounting portion is provided with a connecting piece groove, and the second sheet body is arranged in the connecting piece groove.
6. The housing assembly according to claim 5, characterized in that: A notch is also provided on the top of the mounting portion and matches the shape of the buckling portion. The position of the notch corresponds to the top of the connector groove, and the buckling portion buckles with the notch.
7. The housing assembly according to claim 5, characterized in that: A positioning portion is provided at the bottom of the mounting portion, and a positioning hole corresponding to the positioning portion is provided on the first sheet body, and the positioning portion passes through the positioning hole.
8. The housing assembly according to claim 1, wherein: The limiting portion is provided with two limiting blocks spaced apart along the circumferential direction. When the end cover is covered on the mounting opening, the outer side wall of the limiting block abuts against the inner side wall of the introduction groove.
9. The housing assembly according to claim 1, wherein: A sealing groove is also provided on the outside of the mounting portion, and a sealing member is provided in the sealing groove. The sealing member is used to seal the mounting portion and the housing.
10. An electric toothbrush, characterized in that: include: The housing assembly according to any one of claims 1 to 9; A brush head, arranged at an end of the housing away from the mounting opening; A power assembly is installed in the accommodating cavity, and the power assembly passes through the shell and drives the brush head.