Split type manual toothbrush

Abstract

The utility model discloses a split type manual toothbrush which comprises a brush handle, a handheld handle, a connecting piece and a brush head. According to the toothbrush, the brush handle and the handheld handle are of a split structure through the arranged connecting piece so as to be convenient to disassemble and assemble, so that when the brush head is used for a period of time or bristles on the brush head are damaged or a user replaces the brush head according to specific use requirements, the brush handle can be conveniently replaced, the whole toothbrush structure does not need to be replaced, and the toothbrush is convenient to use. Different requirements of users are met; and when the brush handle is mounted or dismounted, the clamping inner cavity can be opened under the action of the groove, that is, after the second clamping convex ring crosses the first clamping convex ring, the clamping inner cavity can restore to the original shape again so as to facilitate the next insertion connection, the mounting and the dismounting are convenient, the firmness after the mounting can be ensured, and the brush handle is not easy to fall off.

Description

Technical Field

[0001] This utility model relates to a toothbrush, specifically a split-type manual toothbrush, belonging to the field of daily necessities technology. Background Technology

[0002] A toothbrush is a cleaning product with a handle. It is used to apply toothpaste to the brush and then repeatedly brush all parts of the teeth. Most mainstream toothbrushes currently adopt a one-piece structure design, with the brush head and handle fixedly connected by an injection molding process.

[0003] In the prior art, 1) a split-type toothbrush disclosed in CN210643030U utilizes a fixed frame, round hole, brush plate, and elastic protrusion to achieve a split structure for the soft bristles, thus facilitating the individual replacement of the brush plate containing the soft bristles, reducing replacement costs, and saving resources. However, existing split-type toothbrushes are assembled by using a snap-fit ​​between the elastic protrusion and the round hole. This method suffers from insufficient axial force, leading to brush head wobbling, reduced cleaning efficiency, and susceptibility to damage in humid environments. 1) The toothbrush is slippery and requires pressing the protruding head and aligning the position when connecting or disassembling, which is inconvenient to operate; 2) A split electric toothbrush disclosed in CN107693146A includes a handle, a brush head and a drive device for driving the brush head to move. The brush head is detachably mounted on the handle. The brush head includes a moving part located at the front end and a connecting part mounted on the handle. The connecting part is detachably mounted on the handle. The moving part is mounted on the power output shaft of the drive device. When the drive device is turned on, the moving part and the power output shaft move together. In this design, the connecting part contacts the brush handle, and the moving part closely engages with the power output shaft. The power output shaft directly acts on the moving part to ensure the power of the brush head. Existing electric toothbrushes also use a split design, but the split connection structure between the brush head and the handle (main unit) usually needs to meet two core and complex requirements: reliable transmission of motor torque. This requires a specific mechanical structure (such as a polygonal shaft, spline shaft, or specific clip on the motor output shaft) to precisely engage with the drive structure inside the brush head (such as bushings or gears) to achieve effective transmission of motor power to the bristles. As a result, the split connection structure of electric toothbrushes usually requires multiple precision parts, making the structure complex. Summary of the Invention

[0004] The purpose of this invention is to provide a split-type manual toothbrush in order to solve at least one of the above-mentioned technical problems.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a split manual toothbrush, including at least a brush handle, a hand grip, and a brush head; a connector is also installed between the brush handle and the hand grip, the brush head is connected to the front end of the brush handle, the connector includes a connecting rod and an inner insert rod formed coaxially, and a retaining ring is provided at the connection part of the connecting rod and the inner insert rod, wherein the connecting rod is used to insert into the brush handle, and the inner insert rod is used to insert into the hand grip.

[0006] As a further improvement of this utility model: a second locking protrusion is formed at the position of the docking rod near the retaining ring; a docking cavity for accommodating the docking rod is formed inside the brush handle, and a locking cavity is formed at the end of the brush handle near the hand grip, the connection between the docking cavity and the locking cavity is used to accommodate the second locking protrusion; a first locking protrusion is also formed on the inner wall of the locking cavity, and a groove is provided on the cavity wall of the locking cavity, and the second locking protrusion is misaligned and locked together with the first locking protrusion.

[0007] As a further improvement of this utility model: a limiting rod is formed on the side of the connecting rod facing the brush head, and a limiting cavity for accommodating the limiting rod is also provided inside the brush handle, which is connected to the connecting cavity. The cross-sections of the limiting rod and the limiting cavity are both arched.

[0008] As a further improvement of this utility model, a threaded rod is formed on the side of the inner insert rod away from the retaining ring.

[0009] As a further embodiment of this utility model: a front cover is embedded in one end of the handle near the brush handle, the inner insert rod of the connector is inserted into the front cover, and a rear cover is embedded in the other end of the handle.

[0010] As a further improvement of this utility model: a front limiting groove is provided at one end of the handle near the brush handle, a front cover protrusion is fixedly connected to the cover body of the front cover, and the front cover protrusion is inserted into the front limiting groove. The cover body of the front cover is also provided with a front cover recessed groove, and a front waterproof ring is fitted inside the front cover recessed groove.

[0011] As a further improvement of this utility model: a rear limiting groove is provided at the end of the handle away from the brush handle, a rear cover protrusion is fixedly connected to the cover body of the rear cover, and the rear cover protrusion is inserted into the rear limiting groove. The cover body of the rear cover also has a rear cover recessed groove, and a rear waterproof ring is fitted inside the rear cover recessed groove.

[0012] As a further improvement of this utility model: several elongated limiting reinforcing ribs are connected inside the hollow cavity of the handle; the front cover has an axial groove; and when the front cover is inserted into the front end of the handle, the axial groove of the front cover is engaged with the end of the limiting reinforcing rib; the rear cover has a positioning groove; and when the rear cover is inserted into the rear end of the handle, the positioning groove is engaged with the end of any limiting reinforcing rib.

[0013] As a further improvement of this utility model: the front cover has multiple radial grooves, and the rear cover has multiple radial grooves, so that the front cover is connected to the handle.

[0014] As a further improvement of this utility model: a front cover inner insertion cavity is provided at one end of the front cover near the brush handle, and the inner insertion rod is inserted into the front cover inner insertion cavity.

[0015] As a further improvement of this utility model: the cavity wall of the inner cavity of the front cover is provided with a front cover threaded ring, and the threaded rod is threadedly engaged with the front cover threaded ring.

[0016] As a further improvement of this utility model: the opening end of the inner cavity of the front cover is provided with a stepped groove of the front cover, and the stepped groove of the front cover is connected to the inner cavity of the front cover, and the retaining ring is placed in the stepped groove of the front cover.

[0017] The beneficial effects of this utility model are:

[0018] 1) This utility model is provided with a brush handle, a hand grip, and a brush head. The brush handle and the hand grip are movably connected, and a connector is inserted between the brush handle and the hand grip. The connector makes the brush handle and the hand grip have a separate structure for easy disassembly and assembly. Thus, when the brush head is used for a period of time, or when the bristles on the brush head are damaged, or when the user replaces the brush head according to specific usage needs, the brush handle can be easily replaced without replacing the entire toothbrush structure, so as to meet the different needs of users.

[0019] 2) The brush handle of this invention has a locking cavity at one end near the hand grip. A first locking protrusion is connected to the inner wall of the locking cavity, and a groove is formed in the cavity wall. The connector includes a connecting rod, with a second locking protrusion integrally connected to its body. The portion of the connecting rod with the second locking protrusion is inserted into the locking cavity, and the second locking protrusion is misaligned with the first locking protrusion. When the brush handle is connected and fixed using the connector, the connecting rod is inserted into the locking cavity. As the connecting rod continues to extend, the second locking protrusion abuts against one side of the first locking protrusion. Further extension will cause the locking cavity to... The groove opens to allow the second locking protrusion to pass over the first locking protrusion and be positioned on the other side of the first locking protrusion. At this time, the inner cavity of the locking mechanism returns to its original state, allowing the second locking protrusion to form a misaligned locking connection with the first locking protrusion, thus completing the connection between the brush handle and the connector. When the brush handle needs to be disassembled, the groove can also open the inner cavity of the locking mechanism, allowing the second locking protrusion to pass over the first locking protrusion again and be pulled out of the inner cavity of the locking mechanism. The inner cavity of the locking mechanism can return to its original state for the next insertion connection. This facilitates installation and disassembly while ensuring the firmness of the installation and preventing it from falling off.

[0020] 3) This utility model uses only a single connector. The connector only needs to realize the pure mechanical connection function to transmit the manual pressure and slight bending when brushing teeth. It does not need to transmit high-speed torque or realize circuit connection. It eliminates the additional components such as drive shaft sleeve and complex waterproof seals required in the split structure of electric toothbrushes. It does not require complex waterproofing, and has better drainage. The groove of the inner cavity has gap drainage characteristics, which can effectively guide the liquid to flow out naturally and avoid water accumulation and bacterial growth. Compared with the design of electric toothbrushes that rely on sealing rings, it is simpler, more reliable and easier to maintain in the scenario of manual toothbrushes. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the brush handle of this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of the connector of this utility model;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the toothbrush of this utility model;

[0025] Figure 5 This is a three-dimensional structural diagram of the toothbrush of this utility model in disassembled state;

[0026] Figure 6 This is a schematic diagram of the cross-sectional structure of the toothbrush of this utility model in disassembled state;

[0027] Figure 7 This is a schematic diagram of the cross-sectional structure of the hand grip of this utility model;

[0028] Figure 8 This is a three-dimensional structural diagram of the front cover of this utility model;

[0029] Figure 9 This is a schematic diagram of the cross-sectional structure of the front cover of this utility model;

[0030] Figure 10 This is a three-dimensional structural diagram of the back cover of this utility model;

[0031] In the diagram: 1. Brush handle; 11. Connecting inner cavity; 12. Limiting inner cavity; 13. Locking inner cavity; 14. First locking protrusion ring; 15. Groove; 2. Connector; 21. Connecting rod; 22. Limiting rod; 23. Second locking protrusion ring; 24. Inner insertion rod; 25. Snap ring; 26. Threaded rod; 3. Hand grip; 34. Front limiting slot; 35. Rear limiting slot; 36. Limiting reinforcing rib; 4. Brush head; 5. Brush bristles; 6. Front cover; 61. Front cover recessed groove; 62. Front cover radial groove; 63. Front cover protrusion; 64. Front cover inner cavity; 65. Front cover threaded ring; 66. Front cover axial groove; 67. Front cover stepped groove; 7. Rear cover; 71. Positioning groove; 72. Rear cover recessed groove; 73. Rear cover radial groove; 74. Rear cover protrusion; 8. Front waterproof ring; 9. Rear waterproof ring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Combination Figure 1 , Figure 3 and Figure 4 As shown, a split-type manual toothbrush includes a handle 1, a grip 3, a brush head 4, and bristles 5. A connector 2 is inserted between the handle 1 and the grip 3. The brush head 4 is connected to the front end of the handle 1, and a plurality of bristles 5 are connected to the brush head 4. The connector 2 includes a connecting rod 21 and an inner insert rod 24 formed coaxially. A retaining ring 25 is provided at the connection part between the connecting rod 21 and the inner insert rod 24. The connecting rod 21 is used to insert into the handle 1, and the inner insert rod 24 is used to insert into the grip 3.

[0034] The connecting piece 2 allows the brush handle 1 and the hand grip 3 to be separated for easy assembly and disassembly. This makes it easy to replace the brush handle 1 after the brush head 4 has been used for a period of time, or when the bristles 5 on the brush head 4 are damaged, or when the user needs to replace the brush head 4 according to specific usage needs. This eliminates the need to replace the entire toothbrush structure and meets different user needs. Only a single connecting piece 2 is used. The connecting piece 2 only needs to perform a purely mechanical connection function to transmit manual pressure and slight bending during brushing. It does not need to transmit high-speed torque or realize circuit connection, eliminating the need for additional components such as drive shaft sleeves and complex waterproof seals required in the separate structure of electric toothbrushes, and eliminating the need for complex waterproofing.

[0035] In some embodiments, the connector 2 is a single integral component, which achieves a detachable connection between the brush handle 1 and the hand grip 3 by engaging the connecting rod 21 with the locking cavity 13 of the brush handle 1.

[0036] It should be noted that the brush handle 1, connector 2, and hand grip 3 are all made of food-grade polypropylene (PP) or polyethylene terephthalate (PET) material through mold pressing to improve the safety performance of the toothbrush.

[0037] In some embodiments, combined with Figure 2 and Figure 3 As shown, a split-type manual toothbrush further includes: a second locking protrusion 23 is formed on the connecting rod 21 near the retaining ring 25; a connecting cavity 11 for accommodating the connecting rod 21 is formed inside the brush handle 1; a retaining cavity 13 is formed at the end of the brush handle 1 near the hand grip 3; the connection between the connecting cavity 11 and the retaining cavity 13 is used to accommodate the second locking protrusion 23; a first locking protrusion 14 is formed on the inner wall of the retaining cavity 13; and a groove 15 is provided on the cavity wall of the retaining cavity 13; the second locking protrusion 23 and the first locking protrusion 14 are misaligned and locked together.

[0038] When the brush handle 1 is connected and fixed via the connector 2, the docking rod 21 is inserted into the locking cavity 13. As the docking rod 21 continues to extend, the second locking protrusion 23 can abut against one side of the first locking protrusion 14. Further extension will cause the locking cavity 13 to open under the action of the groove 15, allowing the second locking protrusion 23 to pass over the first locking protrusion 14 and be positioned on the other side of the first locking protrusion 14. At this time, the locking cavity 13 will return to its original state, allowing the second locking protrusion 23 and the first locking protrusion 14 to form a misaligned locking connection, thus completing the connection between the brush handle 1 and the connector 2. When the brush handle 1 needs to be disassembled, the inner cavity 13 of the locking position can be opened by the groove 15, so that the second locking protrusion 23 can pass over the first locking protrusion 14 and be pulled out from the inner cavity 13. The inner cavity 13 can be restored to its original state for the next insertion and connection. This facilitates installation and disassembly while ensuring the firmness of the installation and preventing it from falling off. The groove of the inner cavity has gap drainage characteristics, which can effectively guide the liquid to flow out naturally, resulting in better drainage and preventing water accumulation and bacterial growth. Compared with the design of electric toothbrushes that rely on sealing rings, it is simpler, more reliable and easier to maintain in the case of manual toothbrushes.

[0039] The brush handle 1 also has a mating cavity 11 that communicates with the locking cavity 13. The inner diameter of the mating cavity 11 matches the diameter of the mating rod 21. The inner diameter of the locking cavity 13 is larger than the inner diameter of the mating cavity 11. The other end of the mating rod 21 is integrally connected to an inner insertion rod 24. The front end of the inner insertion rod 24 is integrally connected to a threaded rod 26. A retaining ring 25 is provided at the connection between the mating rod 21 and the inner insertion rod 24. The mating cavity 11 provides space for the mating rod 21 to be inserted, ensuring that the part of the mating rod 21 connected to the second locking protrusion ring 23 can be inserted into the locking cavity 13. Furthermore, the design that the inner diameter of the locking cavity 13 is larger than the inner diameter of the mating cavity 11 also provides locking space for the two locking protrusion rings, preventing protrusions from forming on the outer surface of the mating part, thus providing a better aesthetic effect.

[0040] A limiting rod 22 is formed on the side of the connecting rod 21 facing the brush head 4. A limiting cavity 12 for accommodating the limiting rod 22 is also provided inside the brush handle 1, which is connected to the connecting cavity 11. The cross-sections of the limiting rod 22 and the limiting cavity 12 are both arched. When the limiting rod 22 is inserted into the limiting cavity 12, the limiting rod 22 cannot rotate inside the limiting cavity 12 because the cross-sections of both are arched. With the limiting and clamping action of the second locking protrusion 23 and the first locking protrusion 14, the firmness of the connection between the brush handle 1 and the connector 2 can be ensured.

[0041] In addition, the central angle corresponding to the arched cross section of the limiting rod 22 and the limiting inner cavity 12 can be 120°, the groove 15 extends axially along the locking inner cavity 13, and its width can be 0.8mm; the height of the first locking protrusion 14 and the second locking protrusion 23 can both be 0.3mm.

[0042] The inner insert 24 also has a threaded rod 26 on the side away from the retaining ring 25, which ensures the firmness of the mating part when the split brush handle 1 and the hand grip 3 are connected.

[0043] In some embodiments, combined with Figure 3 , Figure 4 and Figure 5 As shown, a front cover 6 is embedded in one end of the handle 3 near the brush handle 1, the inner rod 24 of the connector 2 is inserted into the front cover 6, and a rear cover 7 is embedded in the other end of the handle 3.

[0044] The handle 3 has a front limiting groove 34 near the brush handle 1. A front cover protrusion 63 is fixedly connected to the cover body of the front cover 6, and the front cover protrusion 63 is engaged in the front limiting groove 34. The cover body of the front cover 6 also has a front cover recess 61, and a front waterproof ring 8 is fitted inside the front cover recess 61. When the front cover 6 is connected to the handle 3, the engagement of the front cover protrusion 63 and the front limiting groove 34 ensures that the front cover 6 is not easy to fall off the handle 3, and the front waterproof ring 8 provides a good waterproof effect at the connection point.

[0045] In some embodiments, combined with Figure 6 , Figure 7 and Figure 10 As shown, the end of the handle 3 furthest from the brush handle 1 has a rear limiting groove 35. A rear cover protrusion 74 is fixedly connected to the body of the rear cover 7, and the rear cover protrusion 74 is engaged in the rear limiting groove 35. The body of the rear cover 7 also has a rear cover recess 72, and a rear waterproof ring 9 is fitted inside the rear cover recess 72. When the rear cover 7 is connected to the handle 3, the engagement of the rear cover protrusion 74 and the rear limiting groove 35 ensures that the rear cover 7 is not easily dropped off the handle 3, and the rear waterproof ring 9 provides a good waterproof effect at the connection point.

[0046] In some embodiments, combined with Figure 6 , Figure 7 , Figure 8 and Figure 10 As shown, the hollow cavity of the handle 3 is connected to several elongated reinforcing ribs 36. The front cover 6 has an axial groove 66, and when the front cover 6 is inserted into the front end of the handle 3, the axial groove 66 engages with the end of the reinforcing rib 36. The rear cover 7 has a positioning groove 71, and when the rear cover 7 is inserted into the rear end of the handle 3, the positioning groove 71 engages with the end of any reinforcing rib 36. The engagement of the axial groove 66 and the reinforcing rib 36 prevents the front cover 6 from rotating circumferentially relative to the handle 3, thus ensuring a secure connection between the front cover 6 and the handle 3. Similarly, the engagement of the positioning groove 71 and the reinforcing rib 36 prevents the rear cover 7 from rotating circumferentially relative to the handle 3, ensuring a secure connection between the rear cover 7 and the handle 3.

[0047] The front cover 6 has multiple radial grooves 62, and the rear cover 7 has multiple radial grooves 73, which connect the front cover 6 to the handle 3. The radial groove 62 on the front cover allows the cover body of the front cover 6 to be tapered inward, thus ensuring that the protruding front cover buckle 63 can enter the inner cavity of the handle 3. When the front cover buckle 63 is engaged in the front limiting groove 34, the cover body of the front cover 6 returns to its original shape, ensuring the secure engagement of the front cover buckle 63 and the front limiting groove 34. When the rear cover 7 is connected to the handle 3, the radial groove 73 on the rear cover allows the cover body of the rear cover 7 to be tapered inward, thus ensuring that the protruding rear cover buckle 74 can enter the inner cavity of the handle 3. When the rear cover buckle 74 is engaged in the rear limiting groove 35, the cover body of the rear cover 7 returns to its original shape, ensuring the secure engagement of the rear cover buckle 74 and the rear limiting groove 35.

[0048] The front cover 6 has an inner cavity 64 at one end near the brush handle 1, and the inner rod 24 is inserted into the inner cavity 64. By inserting and connecting the inner rod 24 into the inner cavity 64, the connector 2 can be assembled and connected to the front cover 6. This means that the connection between the front cover 6 and the brush handle 1 can be achieved through a single connector 2, which greatly simplifies the components of the toothbrush.

[0049] like Figure 9 As shown, the cavity wall of the inner cavity 64 of the front cover is provided with a front cover threaded ring 65, and the threaded rod 26 is threadedly engaged with the front cover threaded ring 65, so that the connecting piece 2 and the front cover 6 can be fixedly assembled by threading the threaded rod 26 with the front cover threaded ring 65, thereby ensuring the firmness of the docking part when the split-type brush handle 1 and the front cover 6 are docked.

[0050] The front cover inner cavity 64 has an opening end with a front cover stepped groove 67, which is connected to the front cover inner cavity 64. The retaining ring 25 is engaged in the front cover stepped groove 67. This serves two purposes: firstly, it seals the opening end of the front cover inner cavity 64, preventing water from seeping into the front cover inner cavity 64 when using a toothbrush; secondly, it utilizes the friction between the retaining ring 25 and the front cover stepped groove 67 to prevent the connection between the connector 2 and the front cover 6 from loosening.

[0051] Compared to electric toothbrushes, the detachable manual toothbrush of this invention has the following advantages, specifically including:

[0052] 1. The structure is extremely simplified and the number of parts is minimized, using only a single connector 2. Connector 2 only needs to perform a purely mechanical connection function, without transmitting high-speed torque or realizing circuit connection. Its connection with the brush handle 1 relies entirely on the elastic misalignment and engagement of the locking cavity 13, groove 15, first locking protrusion 14 and second locking protrusion 23. The connection with the handgrip 3 adopts a simple plug-in. The entire split connection mechanism only involves the core component connector 2 and the simple cavity and protrusion structure on the brush handle and handgrip that mate with it, eliminating the additional components such as drive shaft sleeve and complex waterproof seals required in the split structure of electric toothbrushes.

[0053] 2. Although the working environment of a manual toothbrush is humid, there is no risk of high-pressure water flow impact or short circuit of electronic components. This manual detachable toothbrush does not require or include the complex rotating dynamic seal or static seal structure of electric toothbrushes. Through the groove 15 design of the inner cavity 13, it has the gap drainage characteristics, which can effectively guide the liquid to flow out naturally and avoid water accumulation and bacterial growth. Compared with the design of electric toothbrushes that rely on sealing rings, it is simpler, more reliable and easier to maintain in the case of manual toothbrushes. It does not require complicated waterproofing and has better drainage.

[0054] The split-type connection structure of electric toothbrushes, especially the parts involving power transmission and rotary seals, places extremely stringent requirements on the dimensional accuracy of components such as the inner diameter of the bushing, the outer diameter of the drive shaft, the size of the sealing groove, geometric tolerances (concentricity, perpendicularity), and assembly precision. This directly leads to high mold costs and challenges in product yield. The snap-fit ​​structure and plug / threaded connection of this split-type manual toothbrush are mature mechanical connection methods. Their functional implementation has a much higher tolerance for dimensional and assembly precision requirements than the power transmission and dynamic sealing requirements of electric toothbrushes, all within the range easily controlled by conventional injection molding or machining processes, significantly reducing manufacturing difficulty and cost.

[0055] 4. Connector 2 and handle 3 are fixed together by a threaded connection. When connector 2 becomes loose due to wear or deformation caused by long-term use such as repeated insertion and removal or material aging, the user can easily unscrew the handle 3 and connector 2 to replace the connector 2 separately, without having to replace the entire handle 3 or brush handle 1. The replaceable design of connector 2 as an independent consumable part further improves the product's lifespan and economy. In electric toothbrushes, core connecting components such as the drive shaft sleeve are usually integrated with the main unit or are difficult for users to replace.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A split type manual toothbrush comprising at least a brush handle (1), a handgrip (3) and a brush head (4); characterized in that: A connector (2) is also installed between the brush handle (1) and the hand grip (3). The brush head (4) is connected to the front end of the brush handle (1). The connector (2) includes a docking rod (21) and an inner insertion rod (24) formed on the same axis. A retaining ring (25) is provided at the connection part of the docking rod (21) and the inner insertion rod (24). The docking rod (21) is used to insert into the brush handle (1), and the inner insertion rod (24) is used to insert into the hand grip (3).

2. The split-handled toothbrush of claim 1, wherein: A second locking protrusion (23) is formed near the retaining ring (25) on the docking rod (21); a docking cavity (11) for accommodating the docking rod (21) is formed inside the brush handle (1); a locking cavity (13) is formed at one end of the brush handle (1) near the hand grip (3); the connection between the docking cavity (11) and the locking cavity (13) is used to accommodate the second locking protrusion (23); a first locking protrusion (14) is formed on the inner wall of the locking cavity (13); and a groove (15) is provided on the cavity wall of the locking cavity (13); the second locking protrusion (23) and the first locking protrusion (14) are misaligned and locked together.

3. The split-handled toothbrush of claim 2, wherein: The docking rod (21) also forms a limiting rod (22) on the side facing the brush head (4). The brush handle (1) also has a limiting cavity (12) connected to the docking cavity (11) for accommodating the limiting rod (22). The cross-sections of the limiting rod (22) and the limiting cavity (12) are both arched.

4. The split-handled toothbrush of claim 1, wherein: The inner insert (24) also has a threaded rod (26) on the side away from the retaining ring (25).

5. The split-handled toothbrush of claim 4, wherein: The handle (3) has a front cover (6) embedded at one end near the brush handle (1), the inner rod (24) of the connector (2) is inserted into the front cover (6), and the other end of the handle (3) has a rear cover (7).

6. A split-handled toothbrush according to claim 5, wherein: The handle (3) near the brush handle (1) has a front limiting groove (34). The front cover (6) has a front cover buckle (63) fixedly connected to the cover body, and the front cover buckle (63) is inserted into the front limiting groove (34). The front cover (6) also has a front cover recess (61), and a front waterproof ring (8) is fitted inside the front cover recess (61).

7. The split-handled toothbrush of claim 5, wherein: The handle (3) has a rear limiting groove (35) at the end away from the brush handle (1). The back cover (7) has a back cover buckle (74) fixedly connected to the cover body, and the back cover buckle (74) is inserted into the rear limiting groove (35). The back cover (7) also has a back cover recess (72), and a rear waterproof ring (9) is fitted inside the back cover recess (72).

8. The split-handled toothbrush of claim 5, wherein: The hollow cavity of the handle (3) is connected with several long strip-shaped limiting reinforcing ribs (36). The cover body of the front cover (6) is provided with a front cover axial groove (66). When the front cover (6) is inserted into the front end of the handle (3), the front cover axial groove (66) is connected with the end of the limiting reinforcing rib (36) by a limiting snap. The cover body of the rear cover (7) is provided with a positioning groove (71). When the rear cover (7) is inserted into the rear end of the handle (3), the positioning groove (71) is connected with the end of any limiting reinforcing rib (36) by a limiting snap.

9. The split-handled toothbrush of claim 5, wherein: The front cover (6) has multiple radial grooves (62) on its body, and the rear cover (7) has multiple radial grooves (73) on its body, so that the front cover (6) is connected to the handle (3).

10. The split-handled toothbrush of claim 5, wherein: The front cover (6) has an inner cavity (64) at one end near the brush handle (1), and the inner rod (24) is inserted into the inner cavity (64).

11. The split-handled toothbrush of claim 10, wherein: The cavity wall of the inner cavity (64) of the front cover is provided with a front cover threaded ring (65), and the threaded rod (26) is threadedly engaged with the front cover threaded ring (65).

12. The split-handled toothbrush of claim 10, wherein: The front cover inner cavity (64) has an opening end with a front cover stepped groove (67), and the front cover stepped groove (67) is connected to the front cover inner cavity (64). The retaining ring (25) is inserted into the front cover stepped groove (67).

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