阅读说明：本技术 牙胶充填机 (Gutta-percha filling machine ) 是由 陈泽荣 吴坤优 覃荣情 陆友 吴勋贤 林剑华 韦锋文 于 2021-09-14 设计创作，主要内容包括：本发明实施例提供了一种牙胶充填机,涉及口腔治疗器械技术领域,该牙胶充填机包括外壳、发热管、推杆、采集分析单元和显示器。发热管设置于外壳内。推杆部分穿设于发热管内,能够沿着发热管的轴向在第一位置和第二位置之间移动,其中,第一位置和第二位置之间的距离为牙胶剩余量的最大值。采集分析单元设置于外壳内,用于获取推杆的当前位置,并根据当前位置和第二位置之间的距离得到当前牙胶剩余量。显示器设置于外壳,并与采集分析单元电连接,用于将当前牙胶剩余量转化为可视图像。由此,方便医生明确牙胶剩余量,提前补充牙胶,提高患者医疗体验。(The embodiment of the invention provides a gutta-percha filling machine, which relates to the technical field of oral treatment instruments and comprises a shell, a heating tube, a push rod, an acquisition and analysis unit and a display. The heating tube is arranged in the shell. The push rod part penetrates through the heating tube and can move between a first position and a second position along the axial direction of the heating tube, wherein the distance between the first position and the second position is the maximum value of the residual quantity of the gutta percha. The acquisition and analysis unit is arranged in the shell and used for acquiring the current position of the push rod and obtaining the current gutta-percha surplus according to the distance between the current position and the second position. The display is arranged on the shell, is electrically connected with the acquisition and analysis unit and is used for converting the current gutta-percha residual amount into a visible image. Therefore, the toothpaste dispenser is convenient for doctors to clearly determine the residual quantity of the toothpaste, the toothpaste is supplemented in advance, and the medical experience of patients is improved.)

1. A gutta-percha filling machine, comprising:

a housing;

the heating tube is arranged in the shell;

the push rod is partially arranged in the heating tube in a penetrating mode and can move between a first position and a second position along the axial direction of the heating tube, wherein the distance between the first position and the second position is the maximum value of the residual quantity of the gutta-percha;

the acquisition and analysis unit is arranged in the shell and used for acquiring the current position of the push rod and obtaining the current gutta-percha residual amount according to the distance between the current position and the second position;

and the display is arranged on the shell, is electrically connected with the acquisition and analysis unit and is used for converting the current gutta-percha residual amount into a visible image.

2. The gutta-percha filling machine as in claim 1, further comprising a motor and a screw pair disposed within said housing, said screw pair comprising a screw and a nut in threaded engagement;

an output shaft of the motor is coaxially connected with the nut and is spaced from the lead screw;

one end of the screw rod, which is far away from the motor, is coaxially connected with the part of the push rod, which is positioned outside the heating tube, a slide rail which extends along the axial direction of the heating tube is arranged in the shell, and the screw rod is provided with a sliding part which is in sliding fit with the slide rail; the motor is used for driving the nut to rotate so that the lead screw drives the push rod to move between the first position and the second position;

the acquisition and analysis unit is used for acquiring the number of turns of the nut, obtaining the moving distance of the push rod according to the product of the number of turns of the nut and the thread pitch of the nut, and obtaining the current position according to the moving distance.

3. The gutta-percha filling machine as in claim 2, wherein said collecting and analyzing unit comprises a photoelectric sensor and a microprocessor electrically connected;

the photoelectric sensor comprises a transmitting end and a receiving end which are arranged on the inner side wall of the shell, and a connecting line of the transmitting end and the receiving end is intersected with the axis of the nut and forms a preset included angle;

a through hole penetrating through the inner hole of the nut is arranged on the nut and close to the output shaft of the motor, and the axis of the through hole is intersected with the axis of the nut and forms the preset included angle;

the photoelectric sensor is used for sending a first signal to the microprocessor when two ends of the through hole respectively correspond to the transmitting end and the receiving end, and otherwise, sending a second signal;

the microprocessor is used for calculating the number of turns of rotation according to the number of times of conversion between the first signal and the second signal.

4. The gutta-percha filling machine as in claim 1, further comprising a motor and a screw pair disposed within said housing, said screw pair comprising a screw and a nut in threaded engagement;

the output shaft of the motor is coaxially connected with the lead screw;

one end of the nut, which is far away from the motor, is coaxially connected with the part of the push rod, which is positioned outside the heating tube, a slide rail which extends along the axial direction of the heating tube is arranged in the shell, and the nut is provided with a sliding part which is in sliding fit with the slide rail; the motor is used for driving the lead screw to rotate so that the nut drives the push rod to move between the first position and the second position;

the acquisition and analysis unit is used for acquiring the number of turns of the lead screw, obtaining the moving distance of the push rod according to the product of the number of turns of the lead screw and the screw pitch of the lead screw, and obtaining the current position according to the moving distance.

5. The gutta-percha filling machine as in claim 4, wherein said collecting and analyzing unit comprises a photoelectric sensor and a microprocessor electrically connected;

the photoelectric sensor comprises a transmitting end and a receiving end which are arranged on the inner side wall of the shell, and a connecting line of the transmitting end and the receiving end is intersected with the axis of the lead screw and forms a preset included angle;

a through hole is formed in the position, close to the output shaft of the motor, of the lead screw, and the axis of the through hole is intersected with the axis of the lead screw and forms the preset included angle;

the photoelectric sensor is used for sending a first signal to the microprocessor when two ends of the through hole respectively correspond to the transmitting end and the receiving end, and otherwise, sending a second signal;

the microprocessor is used for calculating the number of turns of rotation according to the number of times of conversion between the first signal and the second signal.

6. The gutta-percha filling machine according to claim 3 or 5, wherein said preset included angle is 90 °; the number of the through holes is N, N is a positive integer greater than or equal to 1, and the microprocessor is used for counting the number of rotation turns which is divided by 4N into one turn each time the microprocessor acquires the conversion.

7. The gutta-percha filling machine as in claim 3 or 5, wherein said microprocessor is further electrically connected with said motor for calculating a current rotation speed of an output shaft of said motor according to said number of rotations within a preset time, and adjusting the rotation speed of the output shaft of said motor according to said current rotation speed to maintain said current rotation speed within a preset range.

8. The gutta-percha filling machine according to claim 7, wherein said microprocessor is configured to control the rotation speed of the output shaft of said motor to decrease when said current rotation speed is greater than the maximum value of said preset range, and to increase when said current rotation speed is less than the minimum value of said preset range; and/or the presence of a gas in the gas,

the microprocessor is used for adjusting the rotating speed of the output shaft of the motor by changing the voltage of the motor.

9. The gutta-percha filling machine according to claim 3, wherein a mounting sleeve is further disposed in said housing, said screw is at least partially disposed in said mounting sleeve, said nut is partially disposed in said mounting sleeve, said through hole is disposed in a portion of said nut located outside said mounting sleeve, an output shaft of said motor is coaxially connected to a portion of said nut located outside said mounting sleeve, said mounting sleeve is disposed with said slide rail, and said slide portion is disposed on said screw at a position close to said push rod.

10. The gutta-percha filling machine according to claim 9, wherein said display comprises a display module and a data conversion module, said collection and analysis unit, said data conversion module and said display module are electrically connected in turn, said data conversion module is disposed in said housing, said data conversion module is configured to convert said current gutta-percha remaining amount into visible image information, said display module is exposed to said housing and configured to output a display result of said visible image information in a digital form or a bar graph form.

Technical Field

The invention relates to the technical field of oral treatment instruments, in particular to a gutta-percha filling machine.

Background

Human teeth contain pulp cavities and 1-4 root canals, and blood vessels of dental nerves and trophic nerves are led out through the root canals, so that when infections occur in the pulp due to various conditions, functional damage of the teeth can be caused, and pains, jaw infection and other diseases can be caused. Root canal therapy is also called endodontic therapy, is a treatment method developed in recent years for protecting affected teeth, and has better treatment and protection effects on dental problems such as chronic pulpitis, chronic periapical periodontitis, periodontal pulp combined lesion, traumatic teeth and the like.

Root canal treatment includes several main treatment stages, including root canal preparation, disinfection, root canal filling, etc. after the root canal preparation and disinfection, the root canal filling is to fill the expanded root canal with medicine material to make the medicine material fit to the wall of the root canal. For root canal filling, gutta-percha filling machines are often used.

The inventor researches and discovers that the existing gutta-percha filling machine firstly puts gutta-percha in the filling machine, then heats and softens the gutta-percha and injects the softened gutta-percha into a root canal, so that the filling frequency is limited, if the residual gutta-percha amount is insufficient during treatment, doctors can influence the quality of treatment service, and the medical experience of patients is poor.

Disclosure of Invention

The invention aims to provide a gutta-percha filling machine, which can be used for determining the current remaining amount of the gutta-percha in the gutta-percha filling machine through a display by a doctor so as to replenish the gutta-percha in advance before the next treatment of root canal filling, so that the situations that the treatment is interrupted and the gutta-percha is replenished temporarily due to the shortage of the gutta-percha in the treatment process of the root canal filling are avoided, the treatment service quality is high, and the medical experience of a patient is improved.

In a first aspect, the present invention provides a gutta-percha filling machine, comprising:

a housing;

the heating tube is arranged in the shell;

the push rod is partially arranged in the heating tube in a penetrating mode and can move between a first position and a second position along the axial direction of the heating tube, wherein the distance between the first position and the second position is the maximum value of the residual quantity of the gutta-percha;

the acquisition and analysis unit is arranged in the shell and used for acquiring the current position of the push rod and obtaining the current gutta-percha residual amount according to the distance between the current position and the second position;

and the display is arranged on the shell, is electrically connected with the acquisition and analysis unit and is used for converting the current gutta-percha residual amount into a visible image.

In an alternative embodiment, the gutta-percha filling machine further comprises a motor and a screw pair which are arranged in the shell, wherein the screw pair comprises a lead screw and a nut which are matched in a threaded manner;

an output shaft of the motor is coaxially connected with the nut and is spaced from the lead screw;

one end of the screw rod, which is far away from the motor, is coaxially connected with the part of the push rod, which is positioned outside the heating tube, a slide rail which extends along the axial direction of the heating tube is arranged in the shell, and the screw rod is provided with a sliding part which is in sliding fit with the slide rail; the motor is used for driving the nut to rotate so that the lead screw drives the push rod to move between the first position and the second position;

the acquisition and analysis unit is used for acquiring the number of turns of the nut, obtaining the moving distance according to the product of the number of turns of the nut and the thread pitch of the nut, and obtaining the current position according to the moving distance.

In an alternative embodiment, the acquisition and analysis unit comprises a photoelectric sensor and a microprocessor which are electrically connected;

the photoelectric sensor comprises a transmitting end and a receiving end which are arranged on the inner side wall of the shell, and a connecting line of the transmitting end and the receiving end is intersected with the axis of the nut and forms a preset included angle;

a through hole penetrating through the inner hole of the nut is arranged on the nut and close to the output shaft of the motor, and the axis of the through hole is intersected with the axis of the nut and forms the preset included angle;

the photoelectric sensor is used for sending a first signal to the microprocessor when two ends of the through hole respectively correspond to the transmitting end and the receiving end, and otherwise, sending a second signal;

the microprocessor is used for calculating the number of turns of rotation according to the number of times of conversion between the first signal and the second signal.

In an alternative embodiment, the gutta-percha filling machine further comprises a motor and a screw pair which are arranged in the shell, wherein the screw pair comprises a lead screw and a nut which are matched in a threaded manner;

the output shaft of the motor is coaxially connected with the lead screw;

one end of the nut, which is far away from the motor, is coaxially connected with the part of the push rod, which is positioned outside the heating tube, a slide rail which extends along the axial direction of the heating tube is arranged in the shell, and the nut is provided with a sliding part which is in sliding fit with the slide rail; the motor is used for driving the lead screw to rotate so that the nut drives the lead screw to move between the first position and the second position;

the acquisition and analysis unit is used for acquiring the number of turns of the lead screw, obtaining the moving distance of the push rod according to the product of the number of turns of the lead screw and the screw pitch of the nut, and obtaining the current position according to the moving distance.

In an alternative embodiment, the acquisition and analysis unit comprises a photoelectric sensor and a microprocessor which are electrically connected;

the photoelectric sensor comprises a transmitting end and a receiving end which are arranged on the inner side wall of the shell, and a connecting line of the transmitting end and the receiving end is intersected with the axis of the lead screw and forms a preset included angle;

a through hole is formed in the position, close to the output shaft of the motor, of the lead screw, and the axis of the through hole is intersected with the axis of the lead screw and forms the preset included angle;

the photoelectric sensor is used for sending a first signal to the microprocessor when two ends of the through hole respectively correspond to the transmitting end and the receiving end, and otherwise, sending a second signal;

the microprocessor is used for calculating the number of turns of rotation according to the number of times of conversion between the first signal and the second signal.

In an alternative embodiment, the preset included angle is 90 °; the number of the through holes is N, N is a positive integer greater than or equal to 1, and the microprocessor is used for counting the number of rotation turns which is divided into 4N turns when the microprocessor acquires the conversion every time.

In an optional embodiment, the microprocessor is further electrically connected to the motor, and is configured to calculate a current rotation speed of the output shaft of the motor according to the number of turns in a preset time, and adjust the rotation speed of the output shaft of the motor according to the current rotation speed, so that the current rotation speed is maintained within a preset range.

In an optional embodiment, the microprocessor is configured to control the rotation speed of the output shaft of the motor to decrease when the current rotation speed is greater than a maximum value of the preset range, and control the rotation speed of the output shaft of the motor to increase when the current rotation speed is less than a minimum value of the preset range; and/or the presence of a gas in the gas,

the microprocessor is used for adjusting the rotating speed of the output shaft of the motor by changing the voltage of the motor.

In an optional implementation manner, an installation sleeve is further disposed in the housing, the lead screw is at least partially located in the installation sleeve, the nut is partially located in the installation sleeve, the through hole is disposed in a portion of the nut located outside the installation sleeve, an output shaft of the motor is coaxially connected with a portion of the nut located outside the installation sleeve, the installation sleeve is provided with the slide rail, and the sliding portion is disposed on the lead screw at a position close to the push rod.

In an optional implementation manner, the display includes a display module and a data conversion module, the acquisition and analysis unit, the data conversion module and the display module are electrically connected in sequence, the data conversion module is disposed in the housing, the data conversion module is configured to convert the current gutta percha residual amount into visible image information, and the display module is exposed to the housing and configured to output a display result of the visible image information in a digital form or a column diagram form.

According to the gutta-percha filling machine provided by the embodiment of the invention, after new gutta-percha is filled in the heating pipe, the push rod is located at the first position at the moment, the moving distance acquired by the acquisition and analysis unit is zero, and therefore, a doctor can determine that the residual amount of the gutta-percha is the maximum value at the moment from a visual image displayed by the display. When gutta-percha needs to be filled, the heating tube heats and softens the gutta-percha, the push rod moves from the first position to the second position, so the push rod can extrude the gutta-percha, and the gutta-percha is injected into the root canal of the tooth, wherein when the push rod moves from the first position to the second position, the distance between the current position and the second position of the push rod is gradually reduced, so the residual amount of the gutta-percha is reduced, therefore, the acquisition and analysis unit can obtain the current residual amount of the gutta-percha according to the first position and the current position of the push rod, and the display can display the current residual amount of the gutta-percha in a form of a visible image, so that a doctor can directly confirm the current residual amount of the gutta-percha in real time according to the visible image displayed by the display, so as to supplement the gutta-percha in advance before the next root canal treatment of filling, thereby avoiding the occurrence of gutta shortage and the need of the treatment in the root canal filling process, the condition of temporarily supplementing the gutta-percha occurs, the treatment service quality is high, and the medical experience of the patient is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic sectional view of a gutta-percha filling machine according to an embodiment of the present invention;

FIG. 2 is a functional block diagram according to an embodiment of the present invention;

FIG. 3 is a schematic view of a combination of a screw pair and a mounting sleeve according to an embodiment of the present invention;

FIG. 4 is a schematic view of a nut and photosensor combination according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view A-A of FIG. 4;

fig. 6 is a combination schematic diagram of a housing and a display module according to an embodiment of the present invention.

Icon: 10-a housing; 12-glue injection needle; 14-a heating tube; 16-a push rod; 20-a motor; 22-a lead screw; 221-a sliding part; 24-a nut; 241-a through hole; 26-mounting a sleeve; 261-a slide rail; 28-pin; 30-a photosensor; 301-a transmitting end; 302-a receiving end; 34-a microprocessor; 36-a bearing; 38-a display; 381-data conversion module; 383-display module.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Root canal treatment includes several main treatment stages, root canal preparation, disinfection, root canal filling, etc. the root canal preparation is to perform mechanical cutting and file expanding on the root canal to achieve the required shaping, so as to create better space conditions for subsequent root canal filling. Disinfection is the removal of organic matter in the root canal and infected tissue (bacteria) of the root canal by irrigation after the root canal preparation is completed. In root canal filling, after the root canal preparation and sterilization are completed, a medicinal material is filled into the enlarged root canal so that the filled medicinal material is attached to the wall of the root canal. For root canal filling, gutta-percha filling machines are often used.

The step of filling the root canal is usually to stick a proper gutta-percha point with paste and then to extend into the enlarged root canal, then to soften and cut the gutta-percha point by using a working tip heated by a heat carrier, then to compact the gutta-percha in the root canal by a vertical pressurizer, and finally to fill the root canal by injecting the gutta-percha by using a gutta-percha filling machine. The working process of the gutta-percha filling machine is that the gutta-percha rod is arranged in the instrument, the filling machine heats and softens the gutta-percha rod, and the softened gutta-percha is pushed out from the glue injection needle through the internal push rod.

However, in the existing gutta-percha filling machine, gutta-percha is firstly put in the filling machine and then heated and softened to be injected into the root canal, so that the filling frequency is limited, if the residual gutta-percha amount is insufficient during treatment, a doctor can influence the quality of treatment service, and the medical experience of a patient is poor.

The inventors have studied and provided the following examples to improve the above-mentioned drawbacks of the prior art. Some embodiments of the invention are described in detail below with reference to the accompanying drawings. It should be noted that the features of the following embodiments and examples may be combined with each other without conflict.

Referring to fig. 1 and 2, an embodiment of the present invention provides a gutta-percha filling machine, which includes a housing 10, a heating tube 14, a push rod 16, a collecting and analyzing unit, and a display 38. The heat generating tube 14 is disposed inside the case 10. The push rod 16 is partially inserted into the heat tube 14 and can move between a first position and a second position along the axial direction of the heat tube 14, wherein the distance between the first position and the second position is the maximum value of the residual quantity of the gutta-percha. The acquisition and analysis unit is arranged in the housing 10 and is used for acquiring the moving distance of the push rod 16 in the process that the push rod 16 moves from the first position to the second position, and acquiring the current gutta-percha residual quantity according to the difference between the distance between the first position and the second position and the moving distance. The display 38 is disposed on the housing 10 and electrically connected to the collecting and analyzing unit for converting the current gutta-percha residual amount into a visible image.

As described above, after the heating tube 14 is filled with new gutta-percha, the push rod 16 is located at the first position at this time, and the movement distance acquired by the acquisition and analysis unit is zero, so that the doctor can determine that the remaining amount of the gutta-percha is the maximum value at this time from the visual image displayed on the display 38. When gutta-percha needs to be filled, the heating tube 14 heats and softens the gutta-percha, the push rod 16 moves from the first position to the second position, so that the push rod 16 can extrude the gutta-percha, so that the gutta-percha is injected into the root canal of the tooth, wherein when the push rod 16 moves from the first position to the second position, the distance between the current position and the second position of the push rod 16 is gradually reduced, so that the residual amount of the gutta-percha is reduced, therefore, the acquisition and analysis unit can obtain the current residual amount of the gutta-percha according to the first position and the current position of the push rod 16, and the display 38 displays the current residual amount of the gutta-percha in a form of a visual image, so that a doctor can directly confirm the current residual amount of the gutta-percha in real time according to the visual image displayed by the display 38, so as to supplement the gutta-percha in advance before next root canal filling treatment, and avoid the occurrence of gutta shortage in the treatment process of the root canal filling, the treatment is interrupted, the gutta-percha is temporarily supplemented, the treatment service quality is high, and the medical experience of the patient is improved.

With reference to fig. 1, the housing 10 is substantially cylindrical, a glue injection needle 12 is disposed through a first axial end of the housing 10, and a second axial end of the housing 10 is used for connecting a tail. Heating tube 14 includes coaxial being connected and holds section and linkage segment, the length of linkage segment is less than the length that holds the section, the internal diameter size of linkage segment is greater than the internal diameter size that holds the section, the one end of injecting glue needle 12 is connected in the linkage segment from this, the hole that holds the section is for being used for filling the gutta-percha chamber of gutta-percha, the movable part of push rod 16 wears to locate in this hole that holds the section, thereby under the condition that has the gutta-percha in heating tube 14, the distance between the first end of push rod 16 (being the one end that push rod 16 is close to injecting glue needle 12) and injecting glue needle 12 is present surplus gutta-percha volume promptly, when push rod 16 moved to the direction that is close to injecting glue needle 12, when push rod 16 moved towards the direction of first position to second position, push rod 16 extrudes the soft gutta-percha in injecting glue needle 12 in heating tube 14, thereby soft gutta-percha is injected into the tooth by injecting glue needle 12.

With continued reference to fig. 1, in the present embodiment, the gutta-percha filling machine further includes a motor 20 and a screw pair disposed in the housing 10, and the screw pair includes a screw 22 and a nut 24 which are in threaded engagement. The output shaft of motor 20 is coaxially connected to nut 24 and spaced from lead screw 22. One end of the screw rod 22, which is away from the output shaft of the motor 20, is coaxially connected with the part of the push rod 16, which is positioned outside the heating tube 14, a slide rail 261 which extends along the axial direction of the heating tube 14 is arranged in the casing 10, and the screw rod 22 is provided with a sliding part 221 which is in sliding fit with the slide rail 261; the motor 20 is configured to rotate the nut 24 to move the lead screw 22 with the push rod 16 between the first position and the second position. Wherein, the output shaft of motor 20 and nut 24's connected mode can wear to establish a pin 28 jointly, and the length extending direction of this pin 28 all is the contained angle, for example the right angle with the axis of nut 24 and the axis of the output shaft of motor 20 to the output shaft of motor 20 can drive nut 24 through this pin 28 and rotate.

Therefore, when the motor 20 is started, the output shaft drives the nut 24 to rotate, because the lead screw 22 is provided with the sliding part 221 in sliding fit with the sliding rail 261, the lead screw 22 can only translate but cannot rotate, the lead screw 22 and the nut 24 generate relative threaded motion, the rotary motion of the output shaft of the motor 20 is converted into the linear motion of the lead screw 22, the lead screw 22 can move along the axial direction of the heating tube 14, and the push rod 16 is further driven to move between the first position and the second position along the axial direction of the heating tube 14. For example, when the output shaft of the motor 20 rotates forward, the nut 24 is driven to rotate clockwise, and the lead screw 22 drives the push rod 16 to move toward the glue injection needle 12 (i.e., the push rod 16 moves toward the first position to the second position), so that the push rod 16 pushes against gutta-percha in the heating tube 14, thereby filling the root canal. If the doctor can clearly determine that the residual quantity of the existing gutta-percha cannot meet the requirement of the next root canal filling from the visual image shown by the display 38, the output shaft of the motor 20 is reversed to drive the nut 24 to rotate anticlockwise, and then the lead screw 22 drives the push rod 16 to move towards the direction far away from the glue injection needle 12 (namely the push rod 16 moves towards the direction from the second position to the first position), and then the push rod 16 gives up the space in the heating tube 14, so that the residual gutta-percha in the heating tube 14 is removed and then new gutta-percha is put in, and the root canal filling is carried out again.

Referring to fig. 1 and 3, a mounting sleeve 26 is further disposed in the housing 10, the lead screw 22 is at least partially disposed in the mounting sleeve 26, the nut 24 is partially disposed in the mounting sleeve 26, a through hole 241 is disposed on a portion of the nut 24 outside the mounting sleeve 26, an output shaft of the motor 20 is coaxially connected to a portion of the nut 24 outside the mounting sleeve 26, the mounting sleeve 26 is provided with a slide rail 261, and a sliding portion 221 is disposed on the lead screw 22 near the push rod 16.

Specifically, the slide rail 261 is a slide groove provided on the mounting sleeve 26, and the slide groove extends in the axial direction of the heating tube 14; the sliding portion 221 is a protrusion provided on the screw rod 22, the protrusion extends outward from the outer peripheral surface of the screw rod 22 along the radial direction of the screw rod 22, and is inserted into the sliding groove, and the outer diameter of the sliding portion 221 is smaller than the diameter of the slide rail 261. The sliding portions 221 and the sliding rails 261 are in one-to-one correspondence, each sliding portion 221 and the corresponding sliding rail 261 form a set of sliding pairs, the specific number of the sliding pairs in the present embodiment is not specifically limited, and may be a set, or two or more sets, when the number of the sliding pairs is two or more sets, the sliding rails 261 are distributed at equal intervals around the circumferential direction of the mounting sleeve 26, and the sliding portions 221 are distributed at equal intervals around the circumferential direction of the lead screw 22.

It should be noted that, in other embodiments, the slide rail 261 may be a slide groove directly provided on the inner side wall of the housing 10.

In the present embodiment, at least one bearing 36 is further disposed in the housing 10, specifically, the bearing 36 is disposed in the mounting sleeve 26, and the nut 24 is partially disposed in the bearing 36, so as to reduce the rotation friction of the nut 24 and stabilize the rotation precision of the nut 24. The specific number of the bearings 36 is not particularly limited, and may be one, two, or the like, and the kind of the bearings 36 is not particularly limited, and may be, for example, an angular contact ball bearing 36 or the like.

The acquisition and analysis unit is used for acquiring the number of turns of the nut 24, obtaining the moving distance of the push rod 16 according to the product of the number of turns and the thread pitch of the nut 24, and obtaining the current position of the push rod 16 according to the moving distance, so as to obtain the current gutta-percha residual quantity, namely, the lead screw 22 moves for a distance equal to the thread pitch of the nut 24 every time the nut 24 rotates, and the push rod 16 is the moving distance of the push rod 16 from the first position, wherein the product of the total number of turns of the nut 24 and the thread pitch of the nut 24 is the moving distance of the push rod 16, so that the current position of the push rod 16 can be obtained, and the current gutta-percha residual quantity is displayed in a visual image form by the display 38.

Referring to fig. 2, 4 and 5, in particular, the collecting and analyzing unit includes a photoelectric sensor 30 and a microprocessor 34 electrically connected to each other. The photoelectric sensor 30 comprises a transmitting end 301 and a receiving end 302 which are arranged on the inner side wall of the shell 10, and the connecting line of the transmitting end 301 and the receiving end 302 is intersected with the axis of the nut 24 and forms a preset included angle. A through hole 241 penetrating the inner hole of the nut 24 is arranged on the nut 24 at a position close to the output shaft of the motor 20, and the axis of the through hole 241 intersects with the axis of the nut 24 and forms a preset included angle.

The photo sensor 30 is configured to send a first signal to the microprocessor 34 when two ends of the through hole 241 respectively correspond to the transmitting end 301 and the receiving end 302, and otherwise, send a second signal. The microprocessor 34 is adapted to calculate the number of turns based on the number of transitions between the first signal and the second signal. The preset included angle is 90 degrees. The number of the through holes 241 is N, where N is a positive integer greater than or equal to 1, and the microprocessor 34 is configured to count one-fourth of 4N turns each time a transformation is acquired. It should be noted that, in the case that N is a positive integer greater than or equal to 2, the through holes 241 are distributed at equal intervals along the circumferential direction of the nut 24, in this embodiment, the number of the through holes 241 is 4, so that the microprocessor 34 counts one eighth of the rotation number every time a change is acquired within a preset time, and the rotation number is accumulated by superposition. In addition, the photoelectric sensor 30 can avoid enlarging the diameter of the housing 10, and can satisfy the demand for the compactness of the entire structure of the gutta percha filling machine.

The microprocessor 34 is also electrically connected to the motor 20 for calculating the current rotation speed of the nut 24 according to the number of turns in the preset time, the current rotation speed of the nut 24 is the current rotation speed of the output shaft of the motor 20 because the nut 24 is connected to the output shaft of the motor 20, and the rotation speed of the output shaft of the motor 20 is adjusted according to the current rotation speed so as to maintain the current rotation speed within the preset range. And the current rotating speed is the ratio of the number of rotating turns in the preset rotating time to the preset rotating time.

Further, the microprocessor 34 is configured to control the rotation speed of the output shaft of the motor 20 to decrease when the current rotation speed is greater than the maximum value of the preset range, and to control the rotation speed of the output shaft of the motor 20 to increase when the current rotation speed is less than the minimum value of the preset range.

The microprocessor 34 is configured to adjust the rotation speed of the output shaft of the motor 20 by changing the voltage of the motor 20, so as to change the rotation speed of the nut 24, further change the moving speed of the push rod 16, and finally change the pushing speed of the gutta percha (i.e., the glue injection speed), so that the glue injection is more stable and accurate, for example, when the current rotation speed of the microprocessor 34 is greater than the maximum value of the preset range, the voltage of the motor 20 is reduced, so as to control the rotation speed of the output shaft of the motor 20 to be reduced; and when the current rotating speed is less than the minimum value of the preset range, increasing the voltage of the motor 20, thereby controlling the rotating speed of the output shaft of the motor 20 to increase.

In other embodiments, the screw 22 in the screw pair may be coaxially connected to an output shaft of the motor 20, one end of the nut 24 away from the motor 20 is coaxially connected to a portion of the push rod 16 located outside the heating tube 14, a slide rail 261 extending in the axial direction of the heating tube 14 is disposed in the housing 10, and the nut 24 is provided with a sliding portion 221 in sliding fit with the slide rail 261; the motor 20 is used for driving the lead screw 22 to rotate, so that the nut 24 drives the push rod 16 to move between the first position and the second position; the acquisition and analysis unit is used for acquiring the number of turns of the lead screw 22, obtaining the moving distance of the push rod 16 according to the product of the number of turns and the thread pitch of the lead screw 22, and obtaining the current position of the push rod 16 according to the moving distance. The lead screw 22 is now partially disposed through the bearing 36 and partially within the mounting sleeve 26, and the nut 24 is at least partially disposed within the mounting sleeve 26. The screw 22 is located outside the mounting sleeve 26, and a through hole 241 is provided at a position close to the output shaft of the motor 20, and the axis of the through hole 241 intersects with the axis of the screw 22 and forms a preset included angle. The photoelectric sensor is used for sending a first signal to the microprocessor 34 when two ends of the through hole 241 respectively correspond to the transmitting end 301 and the receiving end 302, otherwise, sending a second signal. The microprocessor 34 is adapted to calculate the number of turns based on the number of transitions between the first signal and the second signal. Similarly, the number of the through holes 241 is not limited specifically, when the number of the through holes 241 is two or more, the through holes 241 are distributed at equal intervals around the circumference of the screw 22, and the transformation of the first signal and the second signal caused by the rotation of the screw 22 by the motor 20 is the same as the principle of the embodiment, and is not described herein again. It should be noted that, since the output shaft of the motor 20 is connected to the lead screw 22, the current rotation speed of the lead screw 22 determined by the microprocessor 34 through the number of rotation turns within the preset time is also the current rotation speed of the output shaft of the motor 20.

It should be understood that the lead screw 22 and the output shaft of the motor 20 may be integrally connected, that is, the lead screw 22 and the output shaft of the motor 20 are integrally formed. Of course, the screw 22 and the output shaft of the motor 20 may be connected in a split manner, and the specific connection manner is not limited in this application as long as the nut 24 can be translated.

Referring to fig. 2 and fig. 6, in the present embodiment, the display 38 includes a display module 383 and a data conversion module 381, the acquisition and analysis unit, the data conversion module 381, and the display module 383 are electrically connected in sequence, specifically, the microprocessor 34, the data conversion module 381, and the display module 383 are electrically connected in sequence, the data conversion module 381 is disposed in the housing 10, the data conversion module 381 is configured to convert the current residual quantity of gutta percha into visible image information, and the display module 383 is exposed on the housing 10 and configured to output a display result in a digital form or a bar graph form, for example, in a percentage form or a progress bar form, to the visible image information. When the push rod 16 is located at the first position, the display result is 100% or full progress bar, and when the push rod 16 is located at the second position, the display result is 0% or empty progress bar.

It should be noted that the microprocessor 34 may be a central processing unit composed of one or a few large scale integrated circuits. These circuits perform the functions of the control unit and the arithmetic logic unit. The microprocessor 34, which is an arithmetic and control section of the microcomputer, performs operations of fetching an instruction, executing the instruction, and exchanging information with an external memory and a logic section. It can be combined with memory and peripheral circuit chip to form microcomputer.

In addition, in other embodiments, the acquisition and analysis unit includes a position sensor and a microprocessor 34 electrically connected, the position sensor being capable of directly acquiring the current position of the pushrod 16 and sending the current position to the microprocessor 34.

In summary, after the heating tube 14 is filled with new gutta-percha, the push rod 16 is located at the first position, the movement distance acquired by the acquisition and analysis unit is zero, and therefore, the doctor can determine that the remaining amount of the gutta-percha is the maximum value at this time from the visual image displayed on the display 38. When gutta-percha filling is needed, the distance between the current position of the push rod 16 and the second position is gradually reduced, so that the remaining amount of the gutta-percha is reduced, the acquisition and analysis unit can obtain the current remaining amount of the gutta-percha according to the first position and the current position of the push rod 16, and the display 38 displays the current remaining amount of the gutta-percha in a form of a visible image, so that a doctor directly determines the current remaining amount of the gutta-percha in real time according to the visible image displayed by the display 38, so that the gutta-percha is supplemented in advance before the next treatment of root canal filling, the problem that the gutta-percha is insufficient and needs to be interrupted in the treatment process of the root canal filling is avoided, the condition of supplementing the gutta-percha temporarily occurs, the treatment service quality is high, and the medical experience of a patient is improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.