Dental handpiece
By designing a normally closed elastic element and a movable valve core in the dental handpiece, the problem of cross-infection caused by contaminant residue is solved, and aseptic operation and safe use of the device are achieved.
Patent Information
- Application Number
- CN202423064440.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2034-12-12
AI Technical Summary
After dental handpieces are used, contaminants can easily remain in the delivery tubes, leading to a risk of cross-infection. In particular, if the contaminants contain pathogenic microorganisms, they may pose a health threat to the next patient.
A dental handpiece structure was designed, including a handpiece body, an intermediate connector, a sealing gasket, and a locking cap. By setting an elastic element and a movable valve core in the lumen, a normally closed structure is formed to ensure that the channel is open when the medium flows in the forward direction and automatically closes when it flows in the reverse direction, preventing contaminants from being drawn back.
This effectively prevents contaminants from remaining in the pipes, avoids the risk of cross-infection, ensures patient safety, and achieves aseptic operation of the equipment.
Smart Images
Figure CN223914215U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a dental equipment field, concretely relates to a dental handpiece. BACKGROUND
[0002] The dental handpiece adopts compressed air to drive the wind wheel to rotate at high speed, drives the dental drill to rotate at high speed and carries out cutting work.When stopping air supply, the wind wheel will continue to rotate for a while due to inertia, and the delivery pipeline will be due to water hammer effect, at this time, negative pressure will be generated at the head of the dental handpiece, liquid such as saliva near the dental handpiece is sucked into the dental handpiece, and the back suction pollutants retained in the dental handpiece and the water gas pipeline will enter the oral cavity of the next patient along with the water gas flow, which may cause nosocomial cross infection.Especially when these pollutants contain pathogenic microorganisms, the next patient may be seriously threatened. SUMMARY
[0003] The utility model discloses a dental handpiece which is simple and compact in structure, can prevent back suction pollution pipeline and equipment, and can avoid cross infection.
[0004] The utility model discloses a dental handpiece which is simple and compact in structure, can prevent back suction pollution pipeline and equipment, and can avoid cross infection.
[0005] The tail end of the handpiece body has a front sealing end face and at least N plug-in pipes protruding from the front sealing end face, wherein N is greater than or equal to 2, and N is an integer;
[0006] The downstream end of the intermediate connector has a rear sealing end face, and the intermediate connector is internally provided with pipe cavities corresponding to the plug-in pipes, the downstream end of each pipe cavity is provided with a plug hole section for plugging the plug-in pipe, and the upstream end of each pipe cavity is sealingly connected with the external pipe, wherein N or N-1 pipe cavities are sequentially provided with elastic elements, movable valve cores and valve holes from the downstream end to the upstream end, the movable end of the elastic element abuts on the movable valve core to make the movable valve core and the valve hole cooperatively form a normally closed passage section;
[0007] The sealing gasket is located between the front sealing end face and the rear sealing end face, and is provided with through holes for the plug-in pipes to pass through;
[0008] The locking cap is sleeved on the outside of the intermediate connector, and is detachably connected with the tail end of the handpiece body and axially presses the intermediate connector to tightly seal the front sealing end face, the sealing gasket and the rear sealing end face of the intermediate connector.
[0009] The mobile phone body has four protruding plug-in pipes on the front sealing end face;
[0010] The elastic element, the movable valve core and the valve hole are arranged in the first, second and third cavities from the downstream end to the upstream end.
[0011] The inner hole of the locking cap has a second limiting protrusion, and the intermediate joint has a first limiting protrusion.
[0012] The first, second and third cavities each include a stepped hole section, and the small-diameter section of the stepped hole section forms a plug-in hole section.
[0013] The large-diameter section of the stepped hole is sealingly connected with the plug-in end of the external connecting pipe.
[0014] The movable valve core is spherical, and the valve hole is spherical.
[0015] The fourth cavity of the four cavities includes a straight hole section, and the front section of the straight hole section forms a plug-in hole section.
[0016] The downstream end of the external connecting pipe is inserted into the corresponding cavity and is in interference fit with the inner wall of the cavity.
[0017] The external connecting pipe is provided with an external taper joint, a pagoda joint or a quick joint.
[0018] The mobile phone body and the locking cap are connected by threads, buckles or clamps.
[0019] The intermediate joint has a first limiting protrusion, which is an annular shaft shoulder, and the inner hole of the locking cap has a second limiting protrusion, which is an annular hole shoulder.
[0020] The utility model discloses a simple and compact structure, can prevent the pollution pipeline, can avoid the bacterium and virus residual in drive gas, water and atomization gas etc.
[0021] The utility model will be further described below in combination with the drawings and specific embodiments. DRAWINGS
[0022] Fig. 1 The utility model discloses a structure schematic view;
[0023] Fig. 2 Fig. 1 is a schematic view of the installation structure of the movable valve core;
[0024] Fig. 3 Fig. 4 is a schematic view of the structure of the fourth lumen.
[0025] In the drawings, 100 is a mobile phone body, 102 is a rear sealing end face, 110 is a plug-in pipe, 200 is an intermediate joint, 201 is a front sealing end face, 202 is a first limiting protrusion, 210 is a lumen, 211 is a plug-in hole section, 212 is an external connecting pipe, 213 is an elastic element, 214 is a movable valve core, 215 is a valve hole, 218 is a large diameter section, 219 is a hole shoulder, 220 is a straight hole section, 300 is a sealing gasket, 310 is a through hole, 400 is a locking cap, 410 is a second limiting protrusion, and 2121 is a tapered joint. DETAILED DESCRIPTION
[0026] With reference to the drawings, the specific implementation of the present application will be described in detail.
[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0028] In the description of the present application, it should be understood that the terms center, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the terms first, second, etc. are for the purpose of description only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features with first and second limitations can be used to explicitly or implicitly include one or more features. In the description of the present application, unless otherwise stated, the meaning of multiple is two or more. It should be noted that in actual application, due to the limitation of equipment precision or installation error, it is difficult to achieve absolute parallelism or perpendicularity. In the present application, the description of perpendicularity, parallelism or co-directionality is not an absolute limiting condition, but indicates that the structure can be arranged vertically or horizontally within a predetermined error range and achieve the corresponding predetermined effect, so that the technical effect of the limited features can be maximized, and the corresponding technical solution is easy to implement and has high feasibility.
[0029] In the description of the present specification, the description of the terms one embodiment, some embodiments, examples, specific examples, or some examples, etc. means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.
[0030] Referring to Figs. 1-3 An embodiment of a dental handpiece, the dental handpiece comprising: a handpiece body 100, an intermediate connector 200, a sealing gasket 300 and a locking cap 400,
[0031] The handpiece body 100 has a front sealing end face 201 and at least N insertion tubes 110 protruding from the front sealing end face 201, wherein N is greater than or equal to 2, N is an integer, the handpiece body 100 is usually two-hole, three-hole, four-hole or six-hole type, N is 2, 3, 4 or 6, for example, two holes are used for driving air and return air; four-hole type, for driving air, atomizing air, water inlet and return air, when the return air pipeline is provided, the outlet air pipeline can not be provided with a valve core to close the pipeline.
[0032] The intermediate connector 200 has a rear sealing end face 102 at the downstream end, and the intermediate connector 200 is provided with a lumen 210 corresponding to the insertion tube 110 inside, each lumen 210 is provided with an insertion hole section 211 at the downstream end for the insertion tube 110 to insert, and each lumen 210 is sealingly connected to an external tube 212 at the upstream end, wherein N or N-1 lumens 210 are sequentially provided with an elastic element 213, a movable valve core 214 and a valve hole 215 from the downstream end to the upstream end, the movable end of the elastic element 213 abuts on the movable valve core to make the movable valve core and the valve hole 215 cooperate to form a normally closed passage section;
[0033] The sealing gasket 300 is located between the front sealing end face 201 and the rear sealing end face 102, and the sealing gasket 300 is provided with a through hole 310 for the insertion tube 110 to pass through;
[0034] The locking cap 400 is sleeved on the intermediate connector 200, and the locking cap 400 is detachably connected to the tail end of the handpiece body 100 and axially compresses the intermediate connector 200, so that the front sealing end face, the sealing gasket 300 and the rear sealing end face 102 of the intermediate connector 200 are tightly sealed.
[0035] In this embodiment, referring to Figs. 1-3, the mobile phone body 100 has a front sealing end face 201 at the tail end and four extended plug-in pipes 110 protruding from the front sealing end face 201; three of the four plug-in pipes 110 can be used as channels for aerosol gas, water inlet and air inlet respectively, and the other plug-in pipe 110 can be used as an exhaust channel,
[0036] The intermediate joint 200 can be made of plastic or metal, preferably made of 304 stainless steel, and has a rear sealing end face 102 at the downstream end, and a plurality of sealing grooves or sealing protrusions can be arranged on the sealing surface to embed the sealing gasket 300, so as to improve the sealing performance.
[0037] Referring to Figs. 2-3 In the embodiment, the intermediate joint 200 is provided with a first limiting protrusion 202 on the outer periphery, and four pipe cavities 210 corresponding to the four plug-in pipes 110 are arranged inside the intermediate joint 200, each pipe cavity 210 is provided with a plug-in hole section 211 for plug-in of the plug-in pipe 110 at the downstream end, and an external pipe 212 is sealingly connected to the upstream end of each pipe cavity 210, Fig. 1 The first and second pipe cavities 210 are shown in the middle, Fig. 2 The third and fourth pipe cavities 210 are shown in the middle, wherein the first, second and third pipe cavities 210 are sequentially provided with an elastic element 213, a movable valve core 214 and a valve hole 215 from the downstream end to the upstream end, the movable end of the elastic element 213 abuts against the movable valve core to make the movable valve core and the valve hole 215 cooperatively form a normally closed passage cross section; the elastic element 213 can be a spiral compression spring.
[0038] The sealing gasket 300 is located between the front sealing end face 201 and the rear sealing end face 102, and the sealing gasket 300 is provided with through holes 310 for the plug-in pipes 110 to pass through;
[0039] The inner hole of the locking cap 400 has a second limiting protrusion 410, which can axially interfere with the first limiting protrusion 202 to press the front sealing end face 201, the sealing gasket 300 and the rear sealing end face 102 of the intermediate joint 200, and the locking cap 400 is detachably connected to the tail end of the mobile phone body 100. The first limiting protrusion 202 can be an annular shaft shoulder, and the second limiting protrusion 410 is an annular hole shoulder 219, which can realize limiting, pressure transmission and pressing of the intermediate joint 200 through cooperation of the shaft shoulder and the hole shoulder 219.
[0040] It can be understood that the rear end of the mobile phone body 100 is sealed and connected with the intermediate joint 200 through the front sealing surface, the rear sealing surface and the sealing gasket 300, and each channel is independent, four pipe cavities 210 are provided for four plug-in pipes 110 to be inserted and connected, the transmission of four working media of the mobile phone in dental operation is met, the water inlet, air inlet, atomizing gas inlet and gas outlet are realized, and the active valve core 214 is arranged in three pipe cavities 210 due to the back suction phenomenon of the water inlet, air inlet and atomizing gas inlet pipeline, the active valve core 214 forms a normally closed structure under the action of the elastic element 213, when the pressure of the water inlet, air inlet and atomizing gas inlet at the upstream end makes the active valve core 214 overcome the elastic force, the valve core and the valve hole 215 are in conduction with the passage end surface, and the water inlet, air inlet or atomizing gas inlet can be continuously carried out, when the back suction phenomenon occurs, the working medium needs to move reversely, the pressure of back suction acts on the valve core and the elastic pressure of the elastic element 213 is superimposed, the valve core and the valve hole 215 are more tightly closed, the working medium of back suction cannot reversely enter the pipeline or the rear end of the joint, and the pipeline is prevented from being polluted. The locking cap 400 is detachably connected with the tail end of the mobile phone body 100, the second limiting protrusion 410 can be axially interfered with the first limiting protrusion 202 to press the front sealing end surface 201, the sealing gasket 300 and the rear sealing end surface 102 of the intermediate joint 200, the independence and closure of each flow channel are realized, and air leakage or water leakage is prevented. The sealing gasket 300 can be made of rubber and can play a good sealing effect.
[0041] In some embodiments, each of the first, second and third pipe cavities 210 includes a stepped hole section, a small diameter section in the stepped hole section forms a plug-in hole section 211, an elastic element 213 and an active valve core 214 are arranged in a large diameter section 218 of the stepped hole section, a first end of the elastic element 213 abuts on a hole shoulder 219 of the stepped hole section, and a second end of the elastic element 213 abuts on the active valve core 214. Through the structure of the stepped hole, the installation of the elastic element 213 and the active valve core 214 is facilitated, the processing cost is low, the structure is simple and compact, and the weight is reduced. The fourth pipe cavity 210 of the four pipe cavities 210 includes a straight hole section 220, a front section of the straight hole section 220 forms a plug-in hole section 211, and a rear section of the straight hole section 220 forms a rear connecting hole, the pipe cavity 210 is used for gas exhaust, the straight hole section 220 is convenient for processing, can have a larger flow cross section as much as possible, and is convenient for gas exhaust.
[0042] The large diameter section 218 of the stepped hole is sealingly matched with the insertion end of the external pipe 212, the external pipe 212 can be interference-fitted with the large diameter section 218 of the stepped hole section, a valve hole 215 is arranged at the front end of the external pipe 212, and through the structure, the processing of the valve hole 215 is facilitated, the valve hole 215 is located at the outer end of the external pipe 212, processing is convenient, and the production cost is reduced.
[0043] In some embodiments, the movable valve core is spherical, and the valve hole 215 is spherical. The spherical valve core has very good sealing performance by sealing between the ball and the valve hole, which can effectively prevent medium leakage; the spherical valve core realizes opening and closing control by ball movement, runs smoothly, and is not easy to produce noise and vibration; the spherical valve core has simple structure, easy to manufacture and process, long service life, flexible opening and closing of the spherical valve core, not easy to appear jamming phenomenon, and small friction in the use process, which ensures the stability and accuracy of the flow. Of course, the movable valve core can also be a conical valve core or other shapes, and the valve hole is matched with the shape of the movable valve core.
[0044] In some embodiments, the downstream end of the external pipe 212 is inserted into the corresponding pipe cavity and is in interference fit with the inner wall of the pipe cavity. This connection structure is simple, has good centering accuracy, can bear torque, axial force or both combined loads, and has high bearing capacity, and can work reliably under impact and vibration loads. At the same time, this connection structure can achieve excellent sealing, and is particularly suitable for small size pipe connection, which can make the overall size and weight of the mobile phone smaller. Of course, the external pipe 212 can also be connected by bonding and the like; it can also be an integral structure with the main body of the intermediate connector 200.
[0045] The external pipe 212 can be inserted with a conventional dental pipe connector, and the external pipe 212 can be connected with a dental pipe through another intermediate connector. In some embodiments, the external pipe 212 is provided with an external conical connector 2121 or a pagoda head, which can be connected with a flexible pipe and can be inserted with a conventional dental pipe connector. The external pipe 212 can also be provided with a quick connector, which can be quickly combined or separated with the quick connector matched on the pipe of the dental equipment.
[0046] In some embodiments, the mobile phone body 100 and the locking cap 400 are connected by threads, buckles or clamps. This kind of connection can fix the mobile phone body and the locking cap 400, and can also be easily disassembled. After use, the main body can be separated for disinfection, which is more thorough. Of course, it is also convenient for disassembly of the intermediate connector 200.
[0047] With the above scheme, before dental treatment, the sterilized handset body 100 can be locked into an integral structure with the intermediate connector 200 through the locking cap 400, the rear end of the handset body 100 can be sealed and connected with the intermediate connector 200 through the front sealing surface, the rear sealing surface and the sealing gasket 300, and the channels are independent of each other, the four tube cavities 210 can be inserted and connected with the four plug-in pipes 110, the transmission of four working media of the handset in dental operation can be met, and the water inlet, air inlet, atomizing gas inlet and gas outlet can be realized. Of course, before sterilization, the exposed end of the intermediate connector 200 can be sterilized by a sterilizing liquid, the sterile preparation of the whole device can be realized, after treatment, the handset body 100 can be separately disassembled and sterilized, the sterilization mode can be the common high-temperature sterilization mode, and the intermediate connector 200 can be left in the pipe end and sterilized by spraying before use, and the reverse suction pollution phenomenon can be avoided in the pipe, and the virus temporary storage and pollution phenomenon of the pipe can be avoided.
[0048] In another use mode, the locking cap 400 forms a handset integral structure with the intermediate connector 200 and the like and the handset body 100, the integral structure is sterilized by high-temperature sterilization before use, the outer pipe connector is separated from the conveying pipe of the dental equipment, due to the normally closed form of the valve core and the valve hole 215, the tail end of the handset as a whole cannot be polluted by bacteria and viruses, after the integral structure is separated from the pipe, the medium in the handset body 100 cannot run, leak and drip from the upstream end of the intermediate connector 200, and the working environment is polluted, during sterilization, the integral structure can be sterilized as a whole or the intermediate connector 200 can be separately sterilized after being separated from the handset body 100, and the sterilization mode is better. In the whole process, the pipe can be prevented from being polluted by bacteria and viruses, and cross infection can be avoided. When used, the sterilized handset is connected with the pipe end, and treatment can be performed.
[0049] With the utility model, the movable valve core 214 is arranged in the three tube cavities 210, the movable valve core 214 forms a normally closed structure under the action of the elastic element 213, when the pressure of the water inlet, air inlet and atomizing gas inlet at the upstream end makes the movable valve core 214 overcome the elastic force, the valve core and the valve hole 215 are in conduction through the passage end surface, water inlet, air inlet or atomizing gas inlet can be continuously performed, when the reverse suction phenomenon occurs, the medium needs to move reversely, the pressure of the reverse suction acts on the valve core and the elastic pressure of the elastic element 213 is superimposed, the valve core and the valve hole 215 are more tightly closed, the working medium of the reverse suction cannot reversely enter the pipe or the rear end of the connector, the pipe is prevented from being polluted, bacteria and viruses can be prevented from remaining in the pipe, and the risk of cross infection is caused.
[0050] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application claims and their equivalent technologies, the present application also intends to include these modifications and variations.
Claims
1. A dental handpiece, characterized in that, include: The mobile phone body (100) has a front sealing end face (201) at its tail end and at least N insertion pipes (110) protruding from the front sealing end face (201), wherein N is greater than or equal to 2 and N is an integer; An intermediate connector (200) has a rear sealing end face (102) at its downstream end. The intermediate connector (200) is provided with a cavity (210) corresponding to the insertion tube (110). Each cavity (210) is provided with a insertion hole section (211) for insertion of the insertion tube (110) at its downstream end. Each cavity (210) is sealed to an outer tube (212) at its upstream end. In N or N-1 cavities (210), an elastic element (213), a movable valve core (214), and a valve hole (215) are arranged sequentially from the downstream end to the upstream end. The movable end of the elastic element (213) abuts against the movable valve core so that the passage section formed by the movable valve core and the valve hole (215) is normally closed. A sealing gasket (300) is located between the front sealing end face (201) and the rear sealing end face (102), and a through hole (310) is provided on the sealing gasket (300) for the insertion tube (110) to pass through. A locking cap (400) is fitted over the intermediate connector (200). The locking cap (400) is detachably connected to the tail end of the mobile phone body (100) and axially presses the intermediate connector (200) so that the front sealing end face, the sealing gasket (300) and the rear sealing end face (102) of the intermediate connector (200) are pressed and sealed.
2. The dental handpiece according to claim 1, characterized in that, The mobile phone body (100) has four protruding insertion tubes (110) protruding from the front sealing end face (201). In the first, second and third described cavities (210), elastic elements (213), movable valve cores (214) and valve holes (215) are sequentially arranged from the downstream end to the upstream end. The inner hole of the locking cap (400) has a second limiting protrusion (410), and the outer periphery of the intermediate connector (200) is provided with a first limiting protrusion (202). The second limiting protrusion (410) can axially interfere with the first limiting protrusion (202).
3. The dental handpiece according to claim 1, characterized in that, Each of the first, second, and third lumens (210) includes a stepped bore section, wherein the small-diameter section of the stepped bore section forms an insertion section (211), and an elastic element (213) and a movable valve core (214) are provided in the large-diameter section (218) of the stepped bore section, wherein the elastic element (213) abuts against the shoulder (219) of the stepped bore section.
4. The dental handpiece according to claim 3, characterized in that, The large-diameter section (218) of the stepped hole seals the insertion end of the outer tube (212), and a valve hole (215) is provided at the front end of the outer tube (212).
5. The dental handpiece according to claim 1, characterized in that, The movable valve core is spherical, and the valve hole (215) is spherical.
6. The dental handpiece according to claim 2, characterized in that, The fourth of the four lumens (210) includes a straight hole section (220), the front section of which forms an insertion hole section (211), and the rear section of which forms a rear connection hole.
7. The dental handpiece according to claim 1 or 4, characterized in that, The downstream end of the external tube (212) is inserted into the corresponding lumen and is press-fitted with the inner wall of the lumen.
8. The dental handpiece according to claim 1, characterized in that, The external pipe (212) is equipped with an external tapered connector (2121), pagoda connector or quick connector.
9. The dental handpiece according to claim 1, characterized in that, The mobile phone body (100) and the locking cap (400) are connected by threads, buckles or clamps.
10. The dental handpiece according to claim 1, characterized in that, The intermediate joint (200) is provided with a first limiting protrusion (202) on its outer periphery. The first limiting protrusion (202) is an annular shoulder. The locking cap (400) has a second limiting protrusion (410) in its inner hole. The second limiting protrusion (410) is an annular shoulder (219). The second limiting protrusion (410) can axially interfere with the first limiting protrusion (202). The elastic element (213) is a helical compression spring. The sealing gasket (300) is made of rubber. The intermediate joint (200) is made of 304 stainless steel.