Anti-suckback dental handpiece

Abstract

The present invention discloses an anti-backsuck dental handpiece, comprising a body and a handpiece, wherein the handpiece comprises a housing and a core rotor, the housing being provided with a cavity for accommodating the core rotor, the core rotor being rotatably mounted in the cavity, the housing being provided with an air inlet and an air return hole, the air inlet and the air return hole being respectively connected to the cavity, an air baffle being mounted in the air return hole, the air baffle being provided with an air baffle portion, the air baffle portion extending toward and close to the core rotor. The dental handpiece of the present invention blocks the driving gas that refluxes after the dental handpiece is shut down by providing an air baffle at the air return hole of the handpiece, thereby preventing excessive negative pressure from occurring inside the handpiece after the dental handpiece is shut down, preventing liquid in the patient's mouth from being sucked into the handpiece, and preventing cross infection between patients.

Description

Technical Field

[0001] The invention belongs to the technical field of dental mobile phones and relates to an anti-suckback dental mobile phone. Background Art

[0002] Currently, existing pneumatic high-speed dental handpieces often generate a significant negative pressure inside the handpiece after they stop working. This can easily cause oral fluids to be sucked back into the handpiece, potentially damaging the handpiece. Incomplete disinfection of the handpiece can also lead to cross-infection between patients. Therefore, it is imperative to design an anti-suckback dental handpiece to address these technical issues. Summary of the Invention

[0003] The purpose of the present invention is to provide an anti-suckback dental handpiece to solve the above technical problems.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an anti-backsuction dental mobile phone, including a body and a head, the head including a shell and a movement rotor, the shell is provided with a cavity for accommodating the movement rotor, the movement rotor can be rotatably installed in the cavity, the shell is provided with an air inlet hole and an air return hole, the air inlet hole and the air return hole are respectively connected to the cavity, an air baffle sleeve is installed in the air return hole, the air baffle sleeve is provided with an air baffle portion, the air baffle portion extends toward the movement rotor and is close to the movement rotor.

[0005] Furthermore, the air-blocking sleeve is provided with an air return passage, and both ends of the air return passage are connected to the air return hole and the cavity respectively.

[0006] Furthermore, the air blocking portion is located at one end of the air blocking sleeve.

[0007] Furthermore, a buffer surface is provided on one side of the air blocking portion of the air blocking sleeve.

[0008] Furthermore, the buffer surface is arc-shaped.

[0009] Furthermore, the outer shape of the air return hole is "D"-shaped, a fitting surface is provided in the air return hole, the air blocking sleeve is provided with a cutout, and a positioning surface is provided at the cutout on the air blocking sleeve. During assembly, the air blocking sleeve is fitted into the air return hole, the positioning surface fits with the fitting surface in the air return hole, and the air blocking sleeve is fixed in the air return hole by glue.

[0010] Furthermore, a positioning hook is provided on one end of the air blocking sleeve away from the air blocking portion.

[0011] Furthermore, a buffer groove is provided on one side of the air blocking portion on the shell.

[0012] The dental handpiece of the present invention has the following beneficial effects: By providing an air baffle at the air return port of the handpiece, the air baffle blocks the backflow of driving gas after the dental handpiece is shut down. This prevents excessive negative pressure from forming inside the handpiece after the handpiece is shut down, preventing oral fluid from being drawn into the handpiece and preventing cross-infection between patients. Furthermore, the dental handpiece of the present invention has a simple and practical structure, reducing production costs and offering a higher cost-effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the structure of a dental mobile phone according to an embodiment of the present invention.

[0014] Figure 2 It is a structural diagram of the movement rotor and the air-blocking sleeve.

[0015] Figure 3 yes Figure 2 Top view of .

[0016] Figure 4 It is a schematic diagram of the structure of a dental handpiece when the movement rotor is removed.

[0017] Figure 5 yes Figure 4 A magnified schematic diagram of I in the figure.

[0018] Figure 6 This is a first perspective view of the air baffle sleeve of Example 1.

[0019] Figure 7 This is a second perspective view of the air baffle sleeve of Example 1.

[0020] Figure 8 This is a front view of the air baffle sleeve of Example 1.

[0021] Figure 9 yes Figure 8 Top view of .

[0022] Figure 10 This is a first perspective view of the air baffle sleeve of Example 2.

[0023] Figure 11 This is a second perspective view of the air baffle sleeve of Example 2.

[0024] Figure 12 This is a front view of the air baffle sleeve of Example 2.

[0025] Figure 13 yes Figure 12 Top view of .

[0026] Description of reference numerals:

[0027] Fuselage 1, nose 2, air baffle 3;

[0028] Housing 21, movement rotor 22, air return hole 23, air inlet hole 24;

[0029] Cavity 211, buffer groove 212;

[0030] Air blocking portion 31 , buffer surface 32 , air return duct 33 , notch 34 , positioning hook 35 , cutout 36 , positioning surface 37 . DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] Example 1:

[0033] like Figure 1 As shown, the anti-backsuck dental handpiece of this embodiment includes a body 1 and a handpiece 2. The handpiece 2 includes a shell 21 and a core rotor 22. Figure 4 and Figure 5 The shell 21 is processed with a cavity 211 for accommodating the movement rotor 22. The movement rotor 22 is rotatably installed in the cavity 211. The shell 21 is processed with an air inlet 24 and an air return hole 23. The air inlet 24 and the air return hole 23 are respectively connected to the cavity 211. The air inlet 24 is connected to the external air source through the air pipe. The external air source inputs driving gas into the cavity 211 through the air inlet 24, thereby driving the movement rotor 22 to rotate. The air return hole 23 is installed with an air blocking sleeve 3, refer to Figure 6-9 One end of the air-blocking sleeve 3 is processed with an air-blocking portion 31, and the air-blocking portion 31 extends toward the movement rotor 22 and is close to the movement rotor 22. Figure 2 and 3 As shown, the air blocking portion 31 does not fit the movement rotor 22 .

[0034] Optimal design scheme, refer to Figure 6-9 The air-blocking sleeve 3 is processed with an air return channel 33, and the two ends of the air return channel 33 are connected to the air return hole 23 and the cavity 211 respectively. A notch 34 is also processed on the air-blocking sleeve 3 to facilitate air return. A buffer surface 32 with an arc shape is processed on one side of the air-blocking portion 31 of the air-blocking sleeve 3. Figure 5 A buffer groove 212 is processed on one side of the air baffle portion 31 on the shell 21. The buffer groove 212 and the buffer surface 32 of the air baffle sleeve 3 form a buffer space. When the dental handpiece stops working, the buffer space buffers the backflow of driving gas to prevent the dental handpiece from stopping suddenly, so as to avoid damage to parts or excessive vibration of the dental handpiece due to sudden stop.

[0035] The preferred design scheme is that the outer shape of the air return hole 23 is "D" shaped, and a fitting surface is processed inside the air return hole 23. Figure 8 and Figure 9 The air deflector sleeve 3 is processed with a notch 36, and a positioning surface 37 is processed at the notch 36 of the air deflector sleeve 3. During assembly, the air deflector sleeve 3 is inserted into the air return hole 23, and the positioning surface 37 is aligned with the fitting surface in the air return hole 23, thereby achieving the positioning of the air deflector sleeve 3. Finally, the air deflector sleeve 3 is fixed to the air return hole 23 by glue, thereby completing the installation of the air deflector sleeve 3.

[0036] Example 2:

[0037] The structure of the air baffle 3 of the dental handpiece of this embodiment is as follows Figure 10-13 shown.

[0038] The difference between the dental mobile phone of this embodiment and the dental mobile phone of embodiment 1 is that a positioning hook 35 is also processed on the end of the air baffle sleeve 3 of the dental mobile phone of this embodiment away from the air baffle part 31, and the positioning hook 35 cooperates with the positioning groove of the dental mobile phone (not shown in the drawings). During assembly, the air baffle sleeve 3 is transitionally matched with the return air hole 23, and the positioning hook 35 cooperates with the positioning groove. Finally, the air baffle sleeve 3 is fixed in the return air hole 23 by glue, thereby realizing the installation of the air baffle sleeve 3.

[0039] The working principle of the dental handpiece of the present invention is: when the dental handpiece stops working, the air blocking portion 31 of the air blocking sleeve 3 blocks the backflow of driving gas to prevent a large negative pressure from occurring inside the handpiece. Due to the gap between the air blocking portion 31 and the movement rotor 22, the driving gas will slowly flow back, thereby causing the movement rotor 22 to slowly stop.

[0040] The dental handpiece of the present invention utilizes an air baffle at the air return port of the handpiece to block the backflow of driving gas after the handpiece is shut down. This prevents a significant negative pressure from developing inside the handpiece after the handpiece is shut down, preventing oral fluid from being drawn into the handpiece and preventing cross-infection between patients. Furthermore, the structure employed by the dental handpiece of the present invention to address the backflow problem is simple and practical, reducing production costs and offering a more cost-effective dental handpiece.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-backsuck dental handpiece, comprising a body (1) and a handpiece (2), wherein the handpiece (2) comprises a shell (21) and a core rotor (22), wherein the shell (21) is provided with a cavity (211) for accommodating the core rotor (22), and the core rotor (22) is rotatably mounted in the cavity (211), and wherein the shell (21) is provided with an air inlet (24) and an air return hole (23), wherein the air inlet hole (24) and the air return hole (23) are respectively connected to the cavity (211), and wherein: An air blocking sleeve (3) is installed in the air return hole (23), and an air blocking portion (31) is provided on the air blocking sleeve (3). The air blocking portion (31) extends toward the movement rotor (22) and is close to the movement rotor (22), and a gap exists between the air blocking portion (31) and the movement rotor (22); An air return duct (33) is provided on the air blocking sleeve (3), and two ends of the air return duct (33) are respectively connected to the air return hole (23) and the cavity (211).

2. The anti-suckback dental handpiece according to claim 1, characterized in that: The air blocking portion (31) is located at one end of the air blocking sleeve (3).

3. An anti-suckback dental handpiece according to claim 1 or 2, characterized in that: A buffer surface (32) is provided on one side of the air blocking portion (31) on the air blocking sleeve (3).

4. The anti-suckback dental handpiece according to claim 3, characterized in that: The buffer surface (32) is arc-shaped.

5. The anti-suckback dental handpiece according to claim 1, characterized in that: The outer shape of the air return hole (23) is "D"-shaped. A fitting surface is provided in the air return hole (23). The air blocking sleeve (3) is provided with a cutout (36). A positioning surface (37) is provided at the cutout (36) on the air blocking sleeve (3). During assembly, the air blocking sleeve (3) is sleeved on the air return hole (23), and the positioning surface (37) fits with the fitting surface in the air return hole (23). The air blocking sleeve (3) is fixed in the air return hole (23) by glue.

6. The anti-suckback dental handpiece according to claim 1, characterized in that: A positioning hook (35) is provided on one end of the air blocking sleeve (3) away from the air blocking portion (31).

7. The anti-suckback dental handpiece according to claim 1, characterized in that: A buffer groove (212) is provided on one side of the air blocking portion (31) on the housing (21).

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