Tooth protection corner with polishing cup capable of being replaced quickly

Abstract

The utility model relates to the technical field of dental treatment instruments, in particular to a tooth protection corner with a polishing cup capable of being replaced quickly, which comprises the polishing cup and a corner body. The first butt joint piece is arranged on the polishing cup; the second butt-joint piece corresponds to the first butt-joint piece and is arranged on the bending angle main body; wherein the polishing cup is provided with a front end portion and a rear end portion which are integrally arranged, and the first butt joint piece is arranged on the side, facing the corner bending body, of the rear end portion; at least part of the rear end part can move relative to the front end part; the tooth protection corner has an installation process and an installation state: in the installation process, the rear end part drives the first butt joint piece, and the first butt joint piece enters an assembly position corresponding to the second butt joint piece by moving in at least one direction; and the first butt joint piece and the second butt joint piece are assembled and positioned by resetting in the radial direction of the rear end part, so that the tooth protection bent angle enters a mounting state. According to the invention, resources and oral treatment cost can be saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dental treatment instrument technical field, concretely relates to a dental care elbow with polishing cup can be quickly replaced. BACKGROUND

[0002] In oral medical service, the dental care elbow as a common dental treatment nursing device is widely used in various oral treatment operations.

[0003] At present, the conventional dental care elbow on the market adopts integrated design, that is, the polishing cup is closely combined with the elbow main body and cannot be disassembled. This design exposes many problems in actual use. After each use, since the polishing cup is difficult to separate alone, the whole dental care elbow can only be discarded as medical waste. In a large number of oral treatment scenes, this not only causes considerable resource waste, but also greatly increases the treatment amount of medical waste.

[0004] Further analysis shows that the elbow main body contains relatively complex transmission structure inside, and in the production and manufacturing process, from the machining of parts to the final assembly, a high cost needs to be invested. Based on this, the operation of directly discarding the dental care elbow also increases the cost of oral treatment.

[0005] Therefore, how to solve the above-mentioned problems existing in the prior art has become the research subject of the utility model. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a dental care elbow with polishing cup can be quickly replaced.

[0007] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0008] A dental care elbow with polishing cup can be quickly replaced, comprising:

[0009] The polishing cup and the elbow main body;

[0010] The first connecting piece is arranged on the polishing cup;

[0011] The second connecting piece is arranged on the elbow main body and corresponds to the first connecting piece;

[0012] Wherein, the polishing cup has an integrated front end and rear end, and the first connecting piece is arranged on one side of the rear end towards the elbow main body;

[0013] At least part of the rear end can move relative to the front end;

[0014] The dental care elbow has an installation process and an installation state:

[0015] During the installation process, the rear end part drives the first adapter, and the first adapter enters the assembly position corresponding to the second adapter through movement in at least one direction.

[0016] The first adapter forms an assembly position with the second adapter through resetting in the radial direction of the rear end part, so that the dental guard corner enters the installation state.

[0017] The first adapter and the second adapter form an adapter structure, and in some embodiments, they form a quick plug structure.

[0018] In the above scheme, the quick assembly and disassembly of the polishing cup and the corner body can be realized through the adapter and separation of the first adapter and the second adapter, which has high convenience. Based on this, the polishing cup can be replaced while the corner body is recycled, which saves resources and oral treatment costs, and reduces the amount of medical waste treatment.

[0019] The first adapter is arranged on the side of the rear end part facing the corner body, which can avoid hindering the fit of the rear end part and the corner body, and also avoid increasing the occupied space of the dental guard corner in the length direction of the corner body.

[0020] During the installation process, the first adapter is driven by the rear end part, which avoids the inconvenience caused by the position setting of the first adapter, improves the convenience of operation, and also avoids the situation that the two cannot be separated due to the inability to directly contact the first adapter and the second adapter after the rear end part and the corner body are fitted and assembled.

[0021] It should be emphasized that the working principle of the dental guard corner is not changed in the present application, and the corner body can have a shaft seat, and the second adapter is arranged on the shaft seat.

[0022] In some embodiments, the rear end part is made of any one of medical silicone rubber (such as room temperature vulcanized silicone rubber), thermoplastic elastomer, and polyurethane.

[0023] Further technical solutions, the first adapter includes two insertion rods, and the two insertion rods are arranged on the side of the rear end part facing the corner body;

[0024] The two insertion rods are symmetrically arranged and symmetrically arranged about the axis of the rear end part;

[0025] During the installation process, the rear end part first drives the two insertion rods to move towards each other, and then drives the two insertion rods to move away from each other;

[0026] The corner body is provided with a groove corresponding to the two insertion rods, and the groove constitutes the second adapter.

[0027] For the convenience of understanding, the rear end part can be regarded as a cylindrical structure.

[0028] Here, the two insertion rods are symmetrically arranged in the vertical direction when in use: the two insertion rods are arranged at the upper end and the lower end of the rear end portion, and by pressing the rear end portion, the upper end and the lower end are moved towards each other, thereby driving the two insertion rods to move towards each other, and then stopping pressing the rear end portion, and the rear end portion automatically resets to drive the two insertion rods to move away from each other.

[0029] The insertion rod is provided in two, which can improve the stability after docking, and can avoid high structure cost, and based on this, the two insertion rods are symmetrically arranged, which can further improve the convenience of operation, and is convenient for single-handed pressing.

[0030] In a further technical solution, the two opposite sides of the rear end portion in the radial direction are pressing deformation zones, and the pressing deformation zones correspond to the insertion rods, and the two insertion rods are driven to move towards each other by the stress deformation of the two pressing deformation zones, and the two insertion rods are driven to move away from each other by the reset of the two pressing deformation zones after the external force is removed.

[0031] This part limits the deformable part of the rear end portion, and improves the structural strength of the rear end portion.

[0032] In a further technical solution, the insertion rod comprises a rod body and a protruding block connected to each other, and the rod body is arranged on one side of the rear end portion facing the bend main body.

[0033] The groove body comprises:

[0034] A first sub-groove corresponding to the two rod bodies;

[0035] Two second sub-grooves in communication with the first sub-groove and corresponding to the two protruding blocks; when the protruding blocks are located in the second sub-grooves, the polishing cup and the bend main body are locked in the assembled state.

[0036] Here, the first sub-groove is a circular groove, and after the rod body is inserted into the first sub-groove, the deformability of the rear end portion is not considered, and the relative movement of the rear end portion and the bend main body in the circumferential direction of the first sub-groove is limited; after the protruding block is inserted into the second sub-groove, the rear end portion and the bend main body are completely limited to separate, so that the rear end portion cannot reset along the path during installation to separate from the bend main body, and the stability of the two during use is ensured.

[0037] The rear end portion first drives the two insertion rods to move towards each other, and then drives the two insertion rods to move away from each other, and in this process, the two protruding blocks first move towards each other to avoid the wall part of the first sub-groove, and then reset to be inserted into the second sub-groove.

[0038] Based on the embodiment, the quick insertion structure is composed of these structures, which is simple in structure, convenient to operate and low in cost.

[0039] In a further technical solution, the second sub-groove is adapted in size to the protruding block.

[0040] The embodiment does not further limit the size of the first sub-groove and the rod body, and through the size limitation of the second sub-groove and the protruding block, when the protruding block is inserted into the second sub-groove, the two are kept in synchronization, which can further ensure the stability of the polishing cup and the curved corner body during use.

[0041] The further technical solution further comprises a guide member arranged on the side of the rear end portion facing the curved corner body, and a insertion slot corresponding to the guide member is arranged on the curved corner body.

[0042] During the installation process, the guide member is first connected with the insertion slot before the first connecting member and the second connecting member are connected, and after the connection, the guide member can provide guidance assistance for the connection process of the first connecting member and the second connecting member, promote the rapid connection of the two, and further improve the operation convenience of the application.

[0043] The further technical solution further comprises a guide member arranged on the side of the rear end portion facing the curved corner body, and a insertion slot corresponding to the guide member is arranged on the curved corner body.

[0044] Or, the wall portion of the insertion slot is provided with a protruding member, and the guide member is provided with a clamping slot corresponding to the protruding member.

[0045] During the connection process of the guide member and the insertion slot, the protruding member is inserted into the clamping slot, and the relative rotation of the guide member and the insertion slot is limited, so that the guide assistance cannot be realized due to the relative rotation of the two during the connection process of the first connecting member and the second connecting member, and the operation convenience of the application is further improved.

[0046] The further technical solution further comprises a guide member arranged on the side of the rear end portion facing the curved corner body, and a insertion slot corresponding to the guide member is arranged on the curved corner body.

[0047] The guide member and the insertion slot are matched in size, and after the two are connected, due to the action of friction, the two are not easy to rotate relatively, so as to limit the relative rotation of the polishing cup and the part of the curved corner body driving the polishing cup, ensure the guide assistance function of the guide member and the insertion slot, and further improve the operation convenience of the application.

[0048] The further technical solution further comprises a guide member arranged on the side of the rear end portion facing the curved corner body, and a insertion slot corresponding to the guide member is arranged on the curved corner body.

[0049] The first connecting member is arranged on the side of the rear end portion facing the curved corner body, which promotes the placement of the first connecting member in the accommodating cavity.

[0050] The accommodating cavity is a built-in cavity of the dental corner, which protects the first connecting member and the second connecting member.

[0051] The first connecting piece and the second connecting piece cannot be contacted after assembly, and the first connecting piece is driven by the rear end part, so that the separation of the first connecting piece and the second connecting piece can be realized without contacting the first connecting piece and the second connecting piece, and the operation convenience of the application is further improved.

[0052] As for the "first", "second" and the like used herein, they do not particularly mean the order or the sequence, nor are used to limit the application, but are only used to distinguish the components or operations described by the same technical terms.

[0053] As for the "connection" or "positioning" used herein, it can mean that two or more components or devices are in direct physical contact with each other or indirectly in physical contact with each other, or can mean that two or more components or devices are in operation or action with each other.

[0054] As for the "contain", "include", "have" and the like used herein, they are all open terms, that is, they mean containing but not limited to.

[0055] As for the words (terms) used herein, except for special notes, they generally have the usual meaning of each word used in this field, in the content of the application and in the special content. Some words used to describe the application will be discussed below or elsewhere in the specification to provide additional guidance for those skilled in the art on the description of the application.

[0056] As for the "front", "rear", "upper", "lower", "left", "right" and the like used herein, they are all directional words, which are only used to illustrate the positional relationship between the structures in the application, and are not used to limit the protection scheme and the specific direction in actual implementation.

[0057] The working principle and advantages of the utility model are as follows:

[0058] During installation, the rear end part drives the first connecting piece, and the first connecting piece enters the assembly position corresponding to the second connecting piece through movement in at least one direction; the first connecting piece forms assembly positioning with the second connecting piece through resetting in the radial direction of the rear end part, so that the dental guard corner enters the installation state.

[0059] Through the connection and separation of the first connecting piece and the second connecting piece, the quick assembly and quick disassembly of the polishing cup and the corner body can be realized, which has high convenience. Therefore, the polishing cup can be replaced to maintain the recycling of the corner body, which has the effects of saving resources and oral treatment cost, and reducing the amount of medical waste treatment.

[0060] The first connecting piece is arranged on the side of the rear end part facing the corner body, which can avoid hindering the fit of the rear end part and the corner body, and also avoid increasing the occupied space of the dental guard corner in the length direction of the corner body.

[0061] During installation, the rear end drives the first mating part, avoiding the inconvenience of operation due to the position of the first mating part, thus improving the convenience of operation; after the rear end is assembled with the corner body, it can also avoid the situation where the first and second mating parts cannot be separated because they cannot be directly contacted. Attached Figure Description

[0062] Figure 1 This is a schematic diagram of the structure of the polishing cup and the curved body in an embodiment of the present invention before they are assembled.

[0063] Figure 2 for Figure 1 A structural diagram from another perspective;

[0064] Figure 3 This is a schematic diagram of the structure of the polishing cup and the curved body after assembly according to an embodiment of the present invention;

[0065] Figure 4 for Figure 3 A structural diagram from another perspective;

[0066] Figure 5 for Figure 1 A sectional view;

[0067] Figure 6 for Figure 3 A sectional view;

[0068] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0069] In the above attached figures: 1. Polishing cup; 11. Front end; 12. Rear end; 2. Bent corner body; 21. Slot; 3. First docking part; 31. Insert rod; 311. Rod body; 312. Protrusion block; 4. Second docking part; 41. Groove body; 411. First sub-groove; 412. Second sub-groove; 5. Guide part; 6. Protrusion part; 7. Slot; 8. Receiving cavity. Detailed Implementation

[0070] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0071] Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0072] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0073] Referring to Figures 1-7 A dental care angle with a quick-change polishing cup, comprising:

[0074] The polishing cup 1 and the angle body 2;

[0075] The first docking part 3 is arranged on the polishing cup 1;

[0076] The second docking part 4 is arranged on the angle body 2 and corresponds to the first docking part 3;

[0077] The polishing cup 1 has an integrated front end 11 and a rear end 12, and the first docking part 3 is arranged on the side of the rear end 12 facing the angle body 2;

[0078] At least part of the rear end 12 can move relative to the front end 11;

[0079] The dental care angle has an installation process and an installed state:

[0080] During the installation process, the rear end 12 drives the first docking part 3, and the first docking part 3 enters the assembly position corresponding to the second docking part 4 through movement in at least one direction;

[0081] The first docking part 3 forms assembly positioning with the second docking part 4 through resetting in the radial direction of the rear end 12, so that the dental care angle enters the installed state.

[0082] The first docking part 3 and the second docking part 4 form a docking structure, and in some embodiments, they form a quick plug structure.

[0083] Through the docking and separation of the first docking part 3 and the second docking part 4, the polishing cup 1 and the angle body 2 can be quickly assembled and quickly disassembled, which has high convenience. Based on this, the polishing cup 1 can be replaced while the angle body 2 is recycled, which has the effects of saving resources and oral treatment costs, and reducing the amount of medical waste treatment.

[0084] The first docking part 3 is arranged on the side of the rear end 12 facing the angle body 2, which can avoid hindering the fit of the rear end 12 and the angle body 2, and also avoid increasing the occupied space of the dental care angle in the length direction of the angle body 2.

[0085] During the installation process, the first docking part 3 is driven by the rear end 12, which avoids the inconvenience caused by the position setting of the first docking part 3, improves the convenience of operation, and also avoids the situation that the first docking part 3 and the second docking part 4 cannot be separated due to the inability to directly contact them after the rear end 12 and the angle body 2 are fitted and assembled.

[0086] During the installation process, initially, the rear end portion 12 drives the first connecting piece 3 to move along the length direction of the insertion rod 31 (which can also be a guide piece 5).

[0087] It is emphasized that the application does not change the working principle of the dental bend, and the bend body 2 can have a shaft seat, and the second connecting piece 4 is arranged on the shaft seat.

[0088] In some embodiments, the rear end portion 12 is made of any one of medical silicone rubber (such as room temperature vulcanized silicone rubber), thermoplastic elastomer, and polyurethane.

[0089] Referring to Figures 5-6 In this embodiment, the first connecting piece 3 includes two insertion rods 31 arranged on one side of the rear end portion 12 towards the bend body 2.

[0090] The two insertion rods 31 are symmetrically arranged with the axis of the rear end portion 12 as the line of symmetry.

[0091] The bend body 2 is provided with a groove 41 corresponding to the two insertion rods 31, and the groove 41 constitutes the second connecting piece 4.

[0092] During the installation process, the rear end portion 12 first drives the two insertion rods 31 to move towards each other, so that the end of the insertion rod 31 is aligned with the mouth of the groove 41, so that the polishing cup 1 and the bend body 2 are assembled; after the polishing cup 1 and the bend body 2 are assembled, the two insertion rods 31 are driven to move away from each other, so that the insertion rod 31 is locked in the groove 41, thereby ensuring the stability of the combination of the polishing cup 1 and the bend body 2.

[0093] For the convenience of understanding, the rear end portion 12 can be regarded as a cylindrical structure.

[0094] Here, the two insertion rods 31 are symmetrically arranged in the vertical direction during use: the two insertion rods 31 are arranged at the upper end and the lower end of the rear end portion 12, respectively, and the two insertion rods 31 are driven to move towards each other by pressing the upper end and the lower end of the rear end portion 12 to move towards each other, and then stopping pressing the rear end portion 12, and the rear end portion 12 is automatically reset to drive the two insertion rods 31 to move away from each other.

[0095] The automatic resetting of the rear end portion 12 can be achieved by the material thereof, and the material is not the innovation point of the application, and examples are given for understanding of resetting, such as carbon fiber composite material and thermoplastic elastomer.

[0096] The two insertion rods 31 are arranged, which can improve the stability after connection, and can also avoid high structure cost, based on which, the symmetrical arrangement of the two insertion rods 31 can further improve the convenience of operation, and facilitate single-handed pressing.

[0097] In some embodiments, the two insertion rods 31 are not symmetrical about the axis of the rear end portion 12, but are symmetrical about a predetermined axis parallel to the axis of the rear end portion 12.

[0098] In the present embodiment, the two opposite sides of the rear end portion 12 in the radial direction are pressing deformation zones corresponding to the two insertion rods 31, and the pressing deformation zones are deformed by an external force to drive the two insertion rods 31 to move towards each other, and the two pressing deformation zones are reset after the external force is removed to drive the two insertion rods 31 to move away from each other.

[0099] The present part limits the deformable part of the rear end portion 12, and improves the structural strength of the rear end portion 12.

[0100] Referring to Figure 2 , Figure 5 and Figure 6 In the present embodiment, the insertion rod 31 comprises a rod body 311 and a protruding block 312 connected to each other, and the rod body 311 is arranged on the side of the rear end portion 12 facing the elbow body 2.

[0101] The groove 41 comprises:

[0102] A first sub-groove 411 corresponding to the two rod bodies 311;

[0103] Two second sub-grooves 412 in communication with the first sub-groove 411 and corresponding to the two protruding blocks 312.

[0104] Here, the first sub-groove 411 is a circular groove, and after the rod body 311 is inserted into the first sub-groove 411, the deformability of the rear end portion 12 is not considered, and the relative movement of the rear end portion 12 and the elbow body 2 in the circumferential direction of the first sub-groove 411 is limited; after the protruding block 312 is inserted into the second sub-groove 412, the separation of the rear end portion 12 and the elbow body 2 is completely limited, so that the rear end portion 12 cannot be reset along the path during installation to separate from the elbow body 2, and the stability of the two during use is ensured.

[0105] The rear end portion 12 first drives the two insertion rods 31 to move towards each other, and then drives the two insertion rods 31 to move away from each other, and in this process, the two protruding blocks 312 first move towards each other to avoid the wall part of the first sub-groove 411, and then reset to be inserted into the second sub-groove 412.

[0106] Based on the present embodiment, the quick insertion structure is composed of these structures, which is simple in structure, convenient to operate and low in cost.

[0107] In the present embodiment, the second sub-groove 412 is sized to fit the protruding block 312.

[0108] The embodiment does not make further restrictions on the size of the first sub-groove 411 and the rod body 311, and through the size restriction of the second sub-groove 412 and the protruding block 312, when the protruding block 312 is inserted into the second sub-groove 412, the two are kept in synchronization, which can further ensure the stability of the polishing cup 1 and the elbow body 2 during use.

[0109] Referring to Figures 1-2 In the embodiment, a guide piece 5 is arranged on the rear end portion 12 towards the elbow body 2, and a slot 21 is arranged on the elbow body 2 corresponding to the guide piece 5.

[0110] During installation, the guide piece 5 is first connected with the slot 21 before the first connecting piece 3 and the second connecting piece 4 are connected, which can provide guidance assistance for the connection process of the first connecting piece 3 and the second connecting piece 4 after the connection, promote the rapid connection of the two, and further improve the operation convenience of the application.

[0111] Referring to Figures 1-2 In the embodiment, a protruding piece 6 is arranged on the guide piece 5, and a clamping groove 7 is arranged on the wall portion of the slot 21 corresponding to the protruding piece 6.

[0112] Alternatively, a protruding piece 6 is arranged on the wall portion of the slot 21, and a clamping groove 7 is arranged on the guide piece 5 corresponding to the protruding piece 6.

[0113] During the connection process of the guide piece 5 and the slot 21, the protruding piece 6 is inserted into the clamping groove 7, which limits the relative rotation of the guide piece 5 and the slot 21, avoids the failure to achieve guidance assistance due to the relative rotation of the two during the connection process of the first connecting piece 3 and the second connecting piece 4, and further improves the operation convenience of the application.

[0114] In the embodiment, the guide piece 5 and the slot 21 are size-fitted.

[0115] The size-fitted guide piece 5 and slot 21 are not easy to rotate relative to each other due to the friction after being connected, thereby limiting the relative rotation of the polishing cup 1 and the part of the elbow body 2 driving the polishing cup 1, ensuring the guidance assistance function of the guide piece 5 and the slot 21, and further improving the operation convenience of the application.

[0116] Referring to Figures 3-4 In the embodiment, in the installed state, the rear end portion 12 is attached to the elbow body 2, the rear end portion 12 and the elbow body 2 form an accommodation cavity 8, the accommodation cavity 8 is isolated from the outside space of the dental elbow, and the first connecting piece 3 and the second connecting piece 4 are both arranged in the accommodation cavity 8.

[0117] The first connecting piece 3 is arranged on the side of the rear end portion 12 towards the elbow body 2, which facilitates the arrangement of the first connecting piece 3 in the accommodation cavity 8.

[0118] The accommodating cavity 8 is a built-in cavity of the tooth guard elbow, and the first connecting piece 3 and the second connecting piece 4 are protected.

[0119] After assembly, the first connecting piece 3 and the second connecting piece 4 cannot be contacted, and the first connecting piece 3 is driven by the rear end 12, so that the separation of the first connecting piece 3 and the second connecting piece 4 can be realized without contacting the first connecting piece 3 and the second connecting piece 4, and the operation convenience of the application is further improved.

[0120] In the installed state, the rear end 12 and the elbow body 2 can have a small gap, such as a few millimeters.

[0121] The above embodiments are only for illustrating the technical concept and characteristics of the utility model, the purpose is to enable the person skilled in the art to understand the content of the utility model and to implement it, and it cannot limit the protection scope of the utility model. Any equivalent change or modification according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A tooth-protecting bend with a quick-change polishing cup, characterized in that: include: Polishing cup (1) and curved body (2); The first docking part (3) is disposed on the polishing cup (1); The second docking piece (4) corresponds to the first docking piece (3) and is disposed on the corner body (2); The polishing cup (1) has an integrally formed front end (11) and rear end (12), and the first docking member (3) is located on the side of the rear end (12) facing the curved body (2); At least a portion of the rear end portion (12) is movable relative to the front end portion (11); The installation process and installation status of the toothbrush bend are as follows: During installation, the rear end (12) drives the first docking member (3), and the first docking member (3) moves into the assembly position corresponding to the second docking member (4) by moving in at least one direction; The first docking member (3) is assembled and positioned with the second docking member (4) by resetting radially at the rear end (12), so that the tooth-guarding bend enters the installation state.

2. The tooth-protecting bend with a quick-change polishing cup according to claim 1, characterized in that: The first docking member (3) includes two inserts (31), which are located on the side of the rear end (12) facing the bend body (2); The two insertion rods (31) are symmetrically arranged with the axis of the rear end (12) as the line of symmetry; During installation, the rear end (12) first drives the two insertion rods (31) to move towards each other, and then drives the two insertion rods (31) to move away from each other; The curved body (2) is provided with a groove (41) corresponding to the two inserts (31), and the groove (41) constitutes the second docking member (4).

3. The tooth-protecting bend with a quick-change polishing cup according to claim 2, characterized in that: The two opposite sides of the rear end (12) are pressing deformation areas, which are set in relation to the insert rod (31). The two insert rods (31) move towards each other through the deformation caused by the force on the two pressing deformation areas, and the two insert rods (31) move away from each other through the reset of the two pressing deformation areas after the external force is removed.

4. The tooth-protecting bend with a quick-change polishing cup according to claim 2, characterized in that: The insertion rod (31) includes a rod body (311) and a protrusion (312) connected together. The rod body (311) is located on the side of the rear end (12) facing the bend body (2). The tank (41) includes: The first sub-slot (411) corresponds to the two rods (311). Two second sub-slots (412) are connected to the first sub-slot (411) and correspond to the two protrusions (312); when the protrusions (312) are located in the second sub-slots (412), the polishing cup (1) and the corner body (2) are locked in an assembled state.

5. The tooth-protecting bend with a quick-change polishing cup according to claim 4, characterized in that: The second sub-groove (412) is sized to match the protrusion (312).

6. The tooth-protecting bend with a quick-change polishing cup according to claim 1, characterized in that: It also includes a guide (5) located on the side of the rear end (12) facing the bend body (2), and the bend body (2) has a slot (21) corresponding to the guide (5).

7. The tooth-protecting bend with a quick-change polishing cup according to claim 6, characterized in that: The guide (5) is provided with a protrusion (6), and the wall of the slot (21) is provided with a slot (7) corresponding to the protrusion (6). Alternatively, the wall of the slot (21) is provided with a protrusion (6), and the guide (5) is provided with a slot (7) corresponding to the protrusion (6).

8. A tooth-protecting bend with a quick-change polishing cup according to claim 6, characterized in that: The guide (5) is sized to fit the slot (21).

9. A tooth-protecting bend with a quick-change polishing cup according to any one of claims 1-8, characterized in that: In the installed state, the rear end (12) and the bend body (2) form a receiving cavity (8), the receiving cavity (8) is isolated from the outer space of the tooth-protecting bend, and the first docking piece (3) and the second docking piece (4) are both placed in the receiving cavity (8).

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