CN210811693U

CN210811693U - Digital periodontoclavia depth measuring device

Info

Publication number: CN210811693U
Application number: CN201921572737.5U
Authority: CN
Inventors: 陈晓端
Original assignee: Shenzhen Suogan Technology Co ltd
Current assignee: Shenzhen Suogan Technology Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-06-23
Anticipated expiration: 2029-09-20

Abstract

The utility model relates to a digital periodontal pocket depth measuring device, which comprises a shell, a probe, a traction wire, a movable loop bar, a spring and a displacement sensor; when the detection needle is abutted against the bottom of the periodontal pocket and then continuously receives a downward force, the detection needle applies a traction force to the traction wire, the detection needle moves upwards along the probe sleeve, the traction wire drives the movable loop bar to compress the spring, and the movable loop bar moves forwards; when the detection needle leaves the bottom of the periodontal pocket, the detection needle stops applying traction force to the traction line, the elastic force of the spring drives the movable sleeve rod to move backwards, and the detection needle moves downwards along the probe sleeve. Through the cooperation between probe, pull wire, activity loop bar and the spring, convert the degree of depth of periodontal pocket into the displacement volume of activity loop bar, the displacement volume of measuring movable loop bar through displacement sensor can acquire the measured data of periodontal pocket depth, not only can realize periodontal pocket depth measurement function, can also direct record measure the data that obtain and acquire electronic measurement data.

Description

Digital periodontoclavia depth measuring device

Technical Field

The utility model relates to the technical field of medical equipment, a dental equipment is related to, especially relate to a digital periodontal pocket depth measuring device.

Background

Periodontal pockets are pathologically deepened gingival sulcus, one of the most important clinical manifestations of periodontitis. The depth of the periodontal pocket is an important criterion for determining whether the gingiva is healthy, and therefore, the periodontal pocket depth measurement is an essential step in the treatment of gingiva.

In the prior art, the depth of the periodontal pocket is generally measured by a mechanical periodontal pocket probe. The mechanical periodontal pocket probe mainly comprises a handle and a probe, and the measurement process of the mechanical periodontal pocket probe is as follows: the doctor holds the handle, slowly probes into to the bottom of periodontal pocket after stretching into the periodontal pocket, when the probe butt in the bottom of periodontal pocket, reads the reading on the probe, according to the reading alright measurement obtain the depth of periodontal pocket.

There may be many pockets in the mouth of a human body, and the details of each pocket need to be recorded during treatment. In the prior art, after measurement is carried out by a mechanical periodontal pocket probe, data needs to be recorded one by a paper pen so as to record the corresponding condition of each periodontal pocket; when the examination report needs to be provided for the patient, the examination report can be formed by further inputting the data recorded by the paper pen into the PC terminal one by one. Therefore, the mechanical periodontal pocket probe in the prior art can satisfy the most basic measurement function, but cannot directly acquire electronic measurement data. Doctors need to repeatedly count and input the data into the PC terminal to obtain the electronic measurement data, and the defects that the measurement data are not convenient to record and the electronic measurement data are not convenient to obtain exist.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiencies of the prior art, the utility model provides a digital periodontal pocket depth measuring device not only can realize periodontal pocket depth measurement function, still has the advantage of being convenient for record measured data and being convenient for directly acquire electronic measurement data.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a digital periodontal pocket depth measuring device comprises a shell, a probe, a pull wire, a movable loop bar, a spring and a displacement sensor;

the front end of the shell is provided with a probe sleeve, and the probe is movably sleeved in the probe sleeve;

one end of the traction wire is fixedly arranged on the probe needle, the other end of the traction wire is fixedly arranged at the front end of the movable sleeve rod, and the traction wire is in a tight state;

the rear end of the movable sleeve rod is provided with a convex ring;

the spring is sleeved on the movable loop bar, one end of the spring is abutted to the inside of the shell, and the other end of the spring is abutted to the raised ring at the rear end of the movable loop bar;

when the detection needle is abutted against the bottom of the periodontal pocket and then continuously receives a downward force, the detection needle can apply a traction force to the traction wire, the detection needle moves upwards along the probe sleeve, the traction wire drives the movable loop bar to compress the spring, and the movable loop bar moves forwards; when the probe needle leaves the bottom of the periodontal pocket, the probe needle stops applying traction force to the traction wire, the elastic force of the spring drives the movable sleeve rod to move backwards, and the probe needle moves downwards along the probe sleeve;

the displacement sensor is arranged on the movable sleeve rod and used for measuring the depth of the periodontal pocket by measuring the displacement of the movable sleeve rod.

Compared with the prior art, the technical scheme has the beneficial effects that: through the cooperation between probe, pull wire, activity loop bar and the spring, convert the degree of depth of periodontal pocket into the displacement volume of activity loop bar, the displacement volume of measuring movable loop bar through displacement sensor can acquire the measured data of periodontal pocket depth, not only can realize periodontal pocket depth measurement function, can also direct record measure the data that obtain and acquire electronic measurement data.

Furthermore, the front end of the shell is also provided with a direction adjusting guide wheel, and the traction wire is wound on the direction adjusting guide wheel.

The beneficial effect of adopting above-mentioned technical scheme is: the direction adjusting guide wheel is arranged at the front end of the shell, the traction wire is wound on the direction adjusting guide wheel, and the friction force of the traction wire at the bending transition angle can be reduced to the maximum extent through the direction adjusting guide wheel, so that the measurement precision is improved.

Furthermore, the probe needle comprises a needle rod part and a circular ring part, the circular ring part is fixedly arranged at the upper end of the needle rod part, and the needle rod part is movably sleeved in the probe sleeve;

the traction wire is divided into an outer wire body and an inner wire body by taking a contact part of the traction wire and the direction adjusting guide wheel as a boundary;

one end of the external wire body is fixedly arranged on the circular ring part, and the external wire body is parallel to the probe needle; one end of the internal line body is fixedly arranged at the front end of the movable sleeve rod, and the internal line body is parallel to the central axis of the movable sleeve rod.

The beneficial effect of adopting above-mentioned technical scheme is: through being provided with the ring portion for the contained angle between the outside line body and the inside line body keeps unchangeable, and at the measuring in-process, be parallel to each other between the outside line body and the probe pin, thereby guarantee as far as possible that the power of exerting on the probe pin can be stabilized between 20-25g, thereby improve measurement accuracy.

Further, the needle rod part comprises a fine needle rod part and a thick needle rod part, the fine needle rod part and the thick needle rod part are coaxially arranged, the thick needle rod part is arranged at the upper end of the fine needle rod part, and the circular ring part is arranged at the upper end of the thick needle rod part;

the probe needle passes through thin needle pole portion movably cover is located in the probe sleeve, the telescopic internal diameter of probe is greater than the external diameter of thin needle pole portion, the telescopic internal diameter of probe is less than the external diameter of thick needle pole portion, thin needle pole portion with form spacing step between the thick needle pole portion.

The beneficial effect of adopting above-mentioned technical scheme is: be two parts of thin needle pole portion and thick needle pole portion with the needle pole portion, make the telescopic internal diameter of probe be greater than the external diameter of thin needle pole portion, the telescopic internal diameter of probe is less than the external diameter of thick needle pole portion moreover, locate the probe sleeve with the probe needle through thin needle pole portion movably cover in, through the spacing step that forms between thin needle pole portion and the thick needle pole portion, can prevent that the probe needle from inserting the probe sleeve deeply excessively.

Further, the shell is divided into a front shell and a rear shell, the movable loop bar is divided into a front loop bar and a rear loop bar, the front loop bar is movably sleeved in the front shell, and the rear loop bar is movably sleeved in the rear shell;

the rear end of the front shell is provided with a sleeving hole, the front end of the rear shell is provided with a sleeving column, and the rear shell is detachably arranged at the rear end of the front shell by being sleeved in the sleeving hole through the sleeving column; the front loop bar and the rear loop bar are detachably connected to each other.

The beneficial effect of adopting above-mentioned technical scheme is: the shell is formed by detachably and mutually connecting the front shell of the rear shell, and the movable loop bar is formed by detachably and mutually connecting the front loop bar and the rear loop bar, so that the whole measuring device forms two detachable structures, namely a front structure and a rear structure, and is convenient to disinfect.

Furthermore, a first connecting magnetic block is arranged at the rear end of the front sleeve rod, and a second connecting magnetic block is arranged at the front end of the rear sleeve rod; the rear loop bar is detachably arranged at the rear end of the front loop bar through magnetic connection between the first connecting magnetic block and the second connecting magnetic block.

The beneficial effect of adopting above-mentioned technical scheme is: the detachable connection between the front loop bar and the rear loop bar can be realized by a simple structure.

Furthermore, a first guide through hole is formed in the front shell, and the front loop bar is movably sleeved in the first guide through hole; a second guide through hole is formed in the rear shell, and the rear loop bar is movably sleeved in the second guide through hole.

The beneficial effect of adopting above-mentioned technical scheme is: carry out the direction through first direction through-hole and inject preceding loop bar, carry out the direction through second direction through-hole to back loop bar and inject, can make activity loop bar can move along the axis of shell, prevent to rock about measuring in-process activity loop bar to improve measurement accuracy.

Furthermore, a circuit board is arranged in the shell, and a main control chip is arranged on the circuit board;

the displacement sensor is a capacitive grid displacement sensor which comprises a fixed polar plate and a movable polar plate; the fixed polar plate is arranged on the bottom surface of the circuit board, the movable polar plate is arranged on the movable loop bar, and the fixed polar plate is positioned above the movable polar plate.

The beneficial effect of adopting above-mentioned technical scheme is: the capacitance value of the capacitive grid displacement sensor is monitored through the main control chip, so that the displacement of the movable sleeve rod can be obtained, and the depth of the periodontal pocket can be obtained.

Furthermore, a display screen for displaying data is arranged outside the shell.

The beneficial effect of adopting above-mentioned technical scheme is: it is convenient to directly read the measured values.

Furthermore, the included angle between the central axis of the movable sleeve rod and the central axis of the probe sleeve is 60-80 degrees.

The beneficial effect of adopting above-mentioned technical scheme is: can better adapt to the physiological structure of the oral cavity of the human body.

Drawings

Fig. 1 is an overall schematic view of a digital periodontal pocket depth measurement device of the present invention;

FIG. 2 is an exploded view of the digital periodontal pocket depth measurement device of the present invention;

FIG. 3 is a schematic view of the housing and the direction-adjusting guide wheel of the digital periodontal pocket depth measurement device of the present invention;

FIG. 4 is a schematic view of a probe of the digital periodontal pocket depth measurement device of the present invention;

FIG. 5 is a schematic view of a probe, a pull wire and a movable sleeve rod in the digital periodontal pocket depth measurement device of the present invention;

FIG. 6 is a schematic view of a housing of the digital periodontal pocket depth measurement device of the present invention;

FIG. 7 is a schematic view of a movable sleeve rod in the digital periodontal pocket depth measurement device of the present invention;

fig. 8 is a schematic view of a first guiding through hole and a second guiding through hole in the digital periodontal pocket depth measurement device of the present invention;

FIG. 9 is a schematic diagram of the relative positions of the fixed pole plate and the movable pole plate in the digital periodontal pocket depth measurement device of the present invention;

fig. 10 is a schematic circuit diagram of a main control chip and a capacitance grid displacement sensor in the digital periodontal pocket depth measuring device of the present invention;

fig. 11 is a schematic circuit diagram of a display screen in the digital periodontal pocket depth measurement device of the present invention.

In the figures, the list of components represented by the various reference numbers is as follows:

the device comprises a shell 1, a probe 2, a pull wire 3, a movable loop bar 4, a spring 5, a fixed polar plate 6 and a movable polar plate 7;

the probe comprises a probe sleeve 11, a direction adjusting guide wheel 12, a front shell 13, a rear shell 14, a first guide through hole 15, a second guide through hole 16 and a circuit board 17;

a needle shaft portion 21, a circular ring portion 22;

a fine needle shaft portion 211, a thick needle shaft portion 212;

an outer wire body 31, an inner wire body 32;

a convex ring 41, a front sleeve rod 42, a rear sleeve rod 43, a first connecting magnetic block 44 and a second connecting magnetic block 45.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or assembly referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "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; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. When an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

As shown in fig. 1 and 2, a digital periodontal pocket depth measuring device mainly comprises: the device comprises a shell 1, a detection needle 2, a traction wire 3, a movable loop bar 4, a spring 5 and a displacement sensor.

The shell 1 is a main body structure of the digital periodontal pocket depth measuring device and mainly plays a role in supporting other components, and the detection needle 2, the pull wire 3, the movable loop bar 4, the spring 5, the displacement sensor and other components are directly or indirectly arranged on the shell 1; in addition, the shell 1 also plays a role of being convenient for holding by hands when being operated by a doctor.

The front end of shell 1 is provided with probe sleeve 11, probe 2 movably cover is located in the probe sleeve 11. One end of the traction wire 3 is fixedly arranged on the probe needle 2, the other end of the traction wire 3 is fixedly arranged at the front end of the movable loop bar 4, and the traction wire 3 is in a tight state.

The rear end of the movable loop bar 4 is provided with a convex ring 41; the spring 5 is sleeved on the movable loop bar 4, one end of the spring 5 abuts against the inside of the shell 1, and the other end of the spring 5 abuts against a raised ring 41 at the rear end of the movable loop bar 4.

The digital periodontium bag depth measuring device realizes the periodontium bag depth measuring function through the mutual matching of the probe 2, the pull wire 3, the movable sleeve rod 4 and the spring 5. When the detection needle 2 is abutted to the bottom of the periodontal pocket and then continuously receives a downward force, the detection needle 2 applies a traction force to the traction wire 3, the detection needle 2 moves upwards along the probe sleeve 11, the traction wire 3 drives the movable loop bar 4 to compress the spring 5, and the movable loop bar 4 moves forwards; when the probe needle 2 leaves the bottom of the periodontal pocket, the probe needle 2 stops applying traction force to the traction wire 3, the elastic force of the spring 5 drives the movable sleeve rod 4 to move backwards, and the probe needle 2 moves downwards along the probe sleeve 11. On the basis of the structure, the function of measuring the depth of the periodontal pocket can be realized by matching with a displacement sensor arranged on the movable sleeve rod 4, wherein the displacement sensor is used for measuring the depth of the periodontal pocket by measuring the displacement of the movable sleeve rod 4.

When the measurement is not started, the spring 5 provides an expansion force, so that the movable sleeve rod 4 has a tendency of moving backwards, the movable sleeve rod 4 can pull the traction wire 3 tightly, the traction wire 3 is in a tight state, and the traction wire 3 drives the probe needle 2 and enables the probe needle 2 to be inserted into the probe sleeve 11 downwards. To start the measurement, the doctor holds the housing 1 and extends the probe 2 into the periodontal pocket and then slowly advances it toward the bottom of the periodontal pocket. When the probe needle 2 abuts against the bottom of the periodontal pocket, the probe needle 2, the pull wire 3, the movable loop bar 4, the spring 5, and the like are all in an initial state. At this time, the doctor applies downward pressure to the probe needle 2, and since the lower end of the probe needle 2 abuts against the bottom of the periodontal pocket, the probe needle 2 is stationary with respect to the oral cavity during this process, but the probe sleeve 11 gradually descends, which corresponds to the probe needle 2 moving upward along the direction of the probe sleeve 11; at this time, the probe needle 2 drives the movable loop bar 4 to move against the elastic force of the spring 5 through the traction rope, the spring 5 is further compressed, and the movable loop bar 4 moves forwards. When the probe sleeve 11 descends to a certain degree, the probe sleeve will be abutted against the gum, and at this time, the length of the probe 2 exposed out of the lower end of the probe sleeve 11 is the depth of the periodontal pocket; correspondingly, the rising height of the probe 2 is the depth of the periodontal pocket; and the probe needle 2 drives the pull wire 3 and the movable loop bar 4 to move in turn, the displacement of the movable loop bar 4 is the depth of the periodontal pocket, and the displacement of the movable loop bar 4 is measured by a displacement sensor, so that the depth of the periodontal pocket can be measured. After the measurement is finished, the doctor slowly takes out the probe needle 2 from the periodontal pocket, and because the abutting force between the bottom of the periodontal pocket and the probe needle 2 does not exist any more, the spring 5 which is further compressed before is restored to the initial state, so that an expansion force is provided to drive the movable sleeve rod 4 to move backwards; furthermore, the pull wire 3 drives the probe 2 to be inserted into the probe sleeve 11 again. It should be noted that, in the present invention, for convenience of description and understanding, the body of the digital periodontal pocket depth measurement device is forward with the direction of the probe 2 and backward with the direction of the distal end of the housing 1.

The utility model discloses an innovation point lies in: not set up the scale that is used for the reading on probe 2, but through probe 2, pull wire 3, the cooperation between components such as activity loop bar 4 and spring 5, convert the degree of depth of periodontal pocket into the displacement volume of activity loop bar 4, the measurement data of periodontal pocket depth can be acquireed to the displacement volume of measuring activity loop bar 4 through displacement sensor, not only can realize periodontal pocket depth measurement function, can also directly obtain the measurement data who acquires the digital formula, be convenient for follow-up direct application that carries on.

In order to adapt to the physiological structure of the oral cavity of the human body, the movement direction of the central axis of the shell 1 and the movement direction of the probe 2 are not on the same straight line, i.e. an included angle exists between the central axis of the movable loop bar 4 and the central axis of the probe sleeve 11, specifically, the included angle between the central axis of the movable loop bar 4 and the central axis of the probe sleeve 11 is 60-80 degrees. Because the one end of pull wire 3 is fixed to be set up on probe 2, the other end is fixed to be set up in the front end of activity loop bar 4, and the direction of motion of activity loop bar 4 and the axis coincidence of shell 1, consequently, at the measuring in-process, pull wire 3 is not along linear motion, but has certain transition angle of buckling, pull wire 3 has great frictional force in this transition angle department of buckling, it is not smooth and easy to lead to the motion of parts such as probe 2 and activity loop bar 4, and then cause the influence to measurement accuracy.

As shown in fig. 3, in order to make the measurement more accurate, the utility model discloses an innovation point lies in: the front end of the shell 1 is also provided with a direction adjusting guide wheel 12, and the traction wire 3 is wound on the direction adjusting guide wheel 12. The direction adjusting guide wheel 12 is arranged at the front end of the shell 1, the traction wire 3 is wound on the direction adjusting guide wheel 12, and the friction force of the traction wire 3 at the bending transition angle can be reduced to the maximum extent through the direction adjusting guide wheel 12, so that the measurement accuracy is improved.

In order for the probe needle 2 to smoothly enter the periodontal pocket and reach the bottom thereof in the process of measuring the depth of the periodontal pocket, the force applied to the probe needle 2 should be between 20 and 25 g. If the force applied to the probe needle 2 is too large, the probe needle 2 is directly inserted into the gum at the bottom of the periodontal pocket, causing damage; if the force applied to the probe needle 2 is too small, the probe needle 2 may not be inserted to the bottom due to the blockage of other tissues. Whether the force is too large or too small, this causes a problem that the measurement accuracy is lowered.

As shown in fig. 4 and 5, in order to further make the measurement more accurate, the innovation point of the present invention lies in: the probe needle 2 comprises a needle rod part 21 and a circular ring part 22, the circular ring part 22 is fixedly arranged at the upper end of the needle rod part 21, and the needle rod part 21 is movably sleeved in the probe sleeve 11. As shown in fig. 5, the traction wire 3 is divided into an outer wire body 31 and an inner wire body 32 by a contact portion with the direction-adjusting guide pulley 12.

The external wire body 31 and the external wire body 31 are connected end to form a traction wire 3; one end of the external wire 31 is fixedly disposed on the circular portion 22, and the external wire 31 is parallel to the probe 2. One end of the internal line body 32 is fixedly arranged at the front end of the movable sleeve rod 4, and the internal line body 32 and the central axis of the movable sleeve rod 4 are parallel to each other

The circular ring portion 22 is provided to enable the outer wire body 31 and the probe pin 2 to be parallel to each other. If the outer wire 31 and the probe needle 2 are not parallel to each other by providing the annular portion 22, it is conceivable that the angle between the outer wire 31 and the probe needle 2 is large at the beginning of measurement, but after the probe needle 2 abuts against the bottom of the periodontal pocket, the probe needle 2 gradually moves upward along the probe sleeve 11 as the doctor continues to apply pressure, and the angle between the outer wire 31 and the probe needle 2 gradually decreases. As the measurement is carried out, even if the force applied to the shell by the doctor is constant, the force applied to the pull wire 3 by the probe needle 2 changes nonlinearly due to the decomposition of the force in different directions, the force applied to the probe needle 2 becomes larger, and the force applied to the probe needle 2 is difficult to be kept within the range of 20-25g, thereby affecting the measurement accuracy.

In the preferred embodiment, the annular part 22 is provided to keep the included angle between the outer wire 31 and the inner wire 32 constant, and during the measurement, the outer wire 31 and the probe 2 are parallel to each other, so as to ensure the force applied to the probe 2 to be between 20 and 25g as much as possible, thereby improving the measurement accuracy.

As shown in fig. 4, preferably, the needle bar portion 21 includes a thin needle bar portion 211 and a thick needle bar portion 212, the thin needle bar portion 211 and the thick needle bar portion 212 are coaxially disposed, the thick needle bar portion 212 is disposed at an upper end of the thin needle bar portion 211, and the circular ring portion 22 is disposed at an upper end of the thick needle bar portion 212; the detection needle 2 is movably sleeved in the probe sleeve 11 through the thin needle rod part 211, the inner diameter of the probe sleeve 11 is larger than the outer diameter of the thin needle rod part 211, the inner diameter of the probe sleeve 11 is smaller than the outer diameter of the thick needle rod part 212, and a limiting step is formed between the thin needle rod part 211 and the thick needle rod part 212.

The probe rod part 21 is divided into two parts, namely a thin probe rod part 211 and a thick probe rod part 212, the inner diameter of the probe sleeve 11 is larger than the outer diameter of the thin probe rod part 211, the inner diameter of the probe sleeve 11 is smaller than the outer diameter of the thick probe rod part 212, the probe needle 2 is movably sleeved in the probe sleeve 11 through the thin probe rod part 211, and a limit step is formed between the thin probe rod part 211 and the thick probe rod part 212 to prevent the probe needle 2 from being inserted into the probe sleeve 11 too deeply. If not, when this measuring device is in the natural state, the expansion force of spring 5 can make activity loop bar 4 have the trend of backward motion, and activity loop bar 4 and then taut pull wire 3 for pull wire 3 is in the tight state, and pull wire 3 drives in the probe needle 2 inserts probe sleeve 11 downwards too deeply, makes the lower extreme of probe needle 2 expose too much, receives the damage easily. And adopt as above setting, the step meeting joint that forms between thin needle pole portion 211 and the thick needle pole plays limiting displacement outside probe sleeve 11, prevents that the lower extreme of probe needle 2 from exposing too much, avoids probe needle 2 to receive the damage.

As shown in fig. 6, the housing 1 is divided into a front case 13 and a rear case 14; as shown in fig. 2, 5 and 7, the movable bar 4 is divided into a front bar 42 and a rear bar 43, and the front bar 42 and the rear bar 43 are detachably connected to each other. Wherein, the front sleeve rod 42 is movably sleeved in the front shell 13, and the rear sleeve rod 43 is movably sleeved in the rear shell 14; the rear end of procapsid 13 is provided with the cup joint hole, the front end of back casing 14 is provided with the cover post, back casing 14 is located in the cup joint hole and detachably set up in the rear end of procapsid 13 through the cover post cover.

When the measuring device is used, the probe needle 2 needs to be placed in the oral cavity of a patient, and inevitably, the front half part of the probe needle 2, the front half part of the movable loop bar 4 and the pull wire 3 can enter the oral cavity of the patient. Since bacteria are present in the oral cavity in many cases, it is very necessary to sterilize the measuring instrument before and after use. Because the electronic element is arranged in the measuring device, the normal operation of the electronic element can be influenced by directly disinfecting the measuring device, and therefore, the measuring device is inconvenient to directly disinfect.

The preferred embodiment described above solves the problem of inconvenience in sterilization. The rear case 14 and the front case 13 are detachably connected to each other to constitute the housing 1, and the front stem 42 and the rear stem 43 are detachably connected to each other to constitute the movable stem 4, so that the entire measuring apparatus forms a detachable front and rear structure. Because in this measuring device, electronic component all sets up in the rear, when needs disinfect, directly dismantle back casing 14 and procapsid 13, preceding loop bar 42 and back loop bar 43 each other and come, only need with procapsid 13, preceding loop bar 42 with pull wire 3 disinfect can, then parts that back casing 14 and back loop bar 43 etc. do not contact patient's oral cavity inside then need not disinfect, so, just can not influence the electronic component in the measuring device, have the advantage of convenient disinfection.

As shown in fig. 7, in order to realize the detachable connection between the front sleeve rod 42 and the rear sleeve rod 43, a first connecting magnetic block 44 is arranged at the rear end of the front sleeve rod 42, and a second connecting magnetic block 45 is arranged at the front end of the rear sleeve rod 43; the rear sleeve bar 43 is detachably disposed at the rear end of the front sleeve bar 42 by magnetic coupling between the first and second coupling

magnetic blocks

44 and 45. In this way, the detachable connection between the front pocket bar 42 and the rear pocket bar 43 can be achieved with a simple structure.

As shown in fig. 8, a first guiding through hole 15 is formed inside the front movable sleeve rod 4, and the front sleeve rod 42 is movably sleeved in the first guiding through hole 15; a second guide through hole 16 is formed in the rear housing 14, and the rear loop bar 43 is movably sleeved in the second guide through hole 16. Carry out the direction through first direction through-hole 15 and prescribe a limit to preceding loop bar 42, carry out the direction through second direction through-hole 16 and prescribe a limit to back loop bar 43, can make activity loop bar 4 can move along the axis of shell 1, prevent to rock about measuring in-process activity loop bar 4 to improve measurement accuracy.

In order to acquire the displacement of the movable sleeve rod 4 and further acquire digital measurement data of the depth of the periodontal pocket, a circuit board 17 is further arranged in the shell 1, and a main control chip is arranged on the circuit board 17; the displacement sensor is a capacitive grid displacement sensor, as shown in fig. 9, the capacitive grid displacement sensor comprises a fixed polar plate 6 and a movable polar plate 7, the fixed polar plate 6 is arranged on the bottom surface of the circuit board 17, the movable polar plate 7 is arranged on the movable loop bar 4, and the fixed polar plate 6 is positioned above the movable polar plate 7.

The working principle of the capacitive displacement sensor is as follows: in the measuring process, the movable sleeve rod 4 can drive the movable pole plate 7 to move, the fixed pole plate 6 keeps static relative to the shell 1, relative displacement exists between the movable pole plate 7 and the fixed pole plate 6, at the moment, a capacitor with a relative area change is formed between the fixed pole plate 6 and the movable pole plate 7, when the relative area between the fixed pole plate 6 and the movable pole plate 7 changes, the capacitance value changes accordingly, the capacitance value of the capacitive grid displacement sensor is monitored through the main control chip, the displacement of the movable sleeve rod 4 can be obtained, and therefore the depth of the pocket around the tooth is obtained.

Specifically, the fixed pole plate 6 and the movable pole plate 7 are spaced by 0.2 mm. The fixed polar plate 6 is provided with a row of comb-shaped transmitting electric plates and a receiving electrode, the transmitting electrodes are arranged in a plurality of groups side by side, and each group of transmitting electrodes is provided with 8 transmitting electrodes. The movable polar plate 7 is provided with a reflecting electrode and a shielding electrode which are sequentially and alternately insulated from each other. One pole pitch on the moving plate 7 corresponds to one set of emitter electrodes. And adding an excitation signal with the same amplitude, frequency and phase to each group of emission electrodes with the same position, wherein the phase difference between the excitation signals on the adjacent electrodes is 2 pi/N (N is the number of the electrodes in one group of emission electrodes). When an excitation signal is applied, an electric field is coupled between the reflective electrode and the receiving electrode, and between the transmitting electrode and the reflective electrode. The resulting output signal on the receive electrode varies with the position between the transmit and the reflective electrodes, due to the capacitive coupling and charge transfer effects of the reflective electrode.

As shown in fig. 10, the main control chip is a CC2541F256 chip, and a CW5680 chip is disposed in the capacitive grating displacement sensor. The CC2541F256 chip is a power consumption optimization type wireless MCU aiming at low power consumption and special 2.4GHz application, a high-performance and low-power 8051 microcontroller core with a code pre-fetching function, a programmable flash memory in a 256KB system, and a 12-bit analog-to-digital converter (ADC) comprising a battery monitor, a temperature sensor, 8 channels and configurable resolution; the CC2541F256 chip is provided with 2 powerful universal asynchronous receiver/transmitters (UARTs) supporting a plurality of serial protocols, 23 universal I/O pins and an I2C interface, and a Bluetooth 4.0 communication protocol is integrated inside.

The CW5680 chip has four frequency options, a built-in RC oscillator, a normal measurement range of 0-9999.99mm and measurement precision of 0.01 mm. The pins PA1-PA8 of the CW5680 chip are sequentially connected to the transmitting electrode of the fixed plate 6, the CSI pins of the CW5680 chip are connected to the receiving electrode, and SCK, D0-D3 are respectively connected to P1_0-P1_4 of the main control chip CC2541F 256. The main control chip can obtain the relative displacement of the polar plates of the movable polar plate 7 and the fixed polar plate 6 by demodulating and calibrating the data output by the capacitive grating sensor, so that the capacitance value of the capacitive grating displacement sensor can be monitored, the displacement of the movable loop bar 4 can be obtained, and the depth of the periodontal pocket can be obtained. Meanwhile, the master control chip transmits the data to the PC end through the Bluetooth to store the record.

Preferably, a display screen for displaying data is further arranged outside the housing 1, so that the measured numerical value can be directly read conveniently. The display screen is arranged outside the shell 1, so that a doctor can read the depth of the periodontal pocket directly through the display screen after measurement, and does not need to read through a PC (personal computer) end, and the operation is more convenient.

As shown in fig. 11, a DSS1306G chip was used as a display screen. The screen resolution of the DSS1306G chip is 128 × 60, and the DSS1306G chip performs data interaction with the master control chip through an I2C bus. Specifically, the OLED _ SCK is a clock line connected to the SCK pin of the main control chip; the OLED _ SDI is a data pin connected to the SDI pin of the main control chip. The display screen is controlled through the main control chip, and then the data display function can be achieved.

Preferably, the housing 1 is further provided with four gum index buttons, and the four gum index buttons are respectively connected with the main control chip. The gingival index represents the gingival condition, reflecting changes in gingival color and quality, and bleeding tendency. Generally, the number of the grades is from 0 to 3, wherein 0 represents the healthy gum; 1 represents the slight inflammation of the gingiva, the color of the gingiva is slightly changed, the gingiva is slightly edematous, and bleeding is not caused by probing; 2, gingival inflammation, red gum, edema and bleeding during probing; 3 represents severe inflammation of the gums, marked redness or ulceration of the gums, and a tendency to auto-bleed.

The specific operation process is as follows: when a doctor measures a certain periodontal pocket, the doctor visually inspects the gingiva around the periodontal pocket, for example, when the doctor determines that the gingival index at the position is 0, the doctor presses a corresponding gingival index button, the gingival index button sends a level signal to a main control chip, and the main control chip records the gingival index in a correlated manner when recording the information of the periodontal pocket.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a digital periodontal pocket depth measuring device which characterized in that: comprises a shell (1), a detecting needle (2), a traction wire (3), a movable loop bar (4), a spring (5) and a displacement sensor;

a probe sleeve (11) is arranged at the front end of the shell (1), and the probe needle (2) is movably sleeved in the probe sleeve (11);

one end of the traction wire (3) is fixedly arranged on the probe needle (2), the other end of the traction wire (3) is fixedly arranged at the front end of the movable loop bar (4), and the traction wire (3) is in a tight state;

a raised ring (41) is arranged at the rear end of the movable loop bar (4);

the spring (5) is sleeved on the movable loop bar (4), one end of the spring (5) is abutted to the inside of the shell (1), and the other end of the spring (5) is abutted to a raised ring (41) at the rear end of the movable loop bar (4);

when the detection needle (2) is abutted to the bottom of a periodontal pocket and then continuously receives a downward force, the detection needle (2) applies a traction force to the traction wire (3), the detection needle (2) moves upwards along the probe sleeve (11), the traction wire (3) drives the movable loop bar (4) to compress the spring (5), and the movable loop bar (4) moves forwards; when the detection needle (2) leaves the bottom of a periodontal pocket, the detection needle (2) stops applying traction force to the traction wire (3), the elastic force of the spring (5) drives the movable sleeve rod (4) to move backwards, and the detection needle (2) moves downwards along the probe sleeve (11);

the displacement sensor is arranged on the movable sleeve rod (4) and is used for measuring the depth of the periodontal pocket by measuring the displacement of the movable sleeve rod (4).

2. The digital periodontal pocket depth measurement device of claim 1, wherein: the front end of the shell (1) is further provided with a direction adjusting guide wheel (12), and the traction wire (3) is wound on the direction adjusting guide wheel (12).

3. The digital periodontal pocket depth measurement device of claim 2, wherein: the probe needle (2) comprises a needle rod part (21) and a circular ring part (22), the circular ring part (22) is fixedly arranged at the upper end of the needle rod part (21), and the needle rod part (21) is movably sleeved in the probe sleeve (11);

the traction wire (3) is divided into an outer wire body (31) and an inner wire body (32) by taking a contact part of the traction wire and the direction adjusting guide wheel (12) as a boundary;

one end of the external wire body (31) is fixedly arranged on the circular ring part (22), and the external wire body (31) is parallel to the probe needle (2); one end of the internal line body (32) is fixedly arranged at the front end of the movable sleeve rod (4), and the internal line body (32) is parallel to the central axis of the movable sleeve rod (4).

4. A digital periodontal pocket depth measuring device according to claim 3, wherein: the needle rod part (21) comprises a thin needle rod part (211) and a thick needle rod part (212), the thin needle rod part (211) and the thick needle rod part (212) are coaxially arranged, the thick needle rod part (212) is arranged at the upper end of the thin needle rod part (211), and the circular ring part (22) is arranged at the upper end of the thick needle rod part (212);

the probe needle (2) passes through thin needle pole portion (211) movably overlaps are located in the probe sleeve (11), the internal diameter of probe sleeve (11) is greater than the external diameter of thin needle pole portion (211), the internal diameter of probe sleeve (11) is less than the external diameter of thick needle pole portion (212), thin needle pole portion (211) with form spacing step between thick needle pole portion (212).

5. The digital periodontal pocket depth measurement device of claim 1, wherein: the shell (1) is divided into a front shell (13) and a rear shell (14), the movable loop bar (4) is divided into a front loop bar (42) and a rear loop bar (43), the front loop bar (42) is movably sleeved in the front shell (13), and the rear loop bar (43) is movably sleeved in the rear shell (14);

the rear end of the front shell (13) is provided with a sleeving hole, the front end of the rear shell (14) is provided with a sleeving column, and the rear shell (14) is detachably arranged at the rear end of the front shell (13) by being sleeved in the sleeving hole through the sleeving column; the front loop bar (42) and the rear loop bar (43) are detachably connected to each other.

6. The digital periodontal pocket depth measurement device of claim 5, wherein: a first connecting magnetic block (44) is arranged at the rear end of the front sleeve rod (42), and a second connecting magnetic block (45) is arranged at the front end of the rear sleeve rod (43); the rear loop bar (43) is detachably arranged at the rear end of the front loop bar (42) through the magnetic connection between the first connecting magnetic block (44) and the second connecting magnetic block (45).

7. The digital periodontal pocket depth measurement device of claim 5, wherein: a first guide through hole (15) is formed in the front shell (13), and the front loop bar (42) is movably sleeved in the first guide through hole (15); the inside of back casing (14) is provided with second direction through-hole (16), back loop bar (43) movable sleeve is located in second direction through-hole (16).

8. The digital periodontal pocket depth measurement device of claim 1, wherein: a circuit board (17) is further arranged in the shell (1), and a main control chip is arranged on the circuit board (17);

the displacement sensor is a capacitive grid displacement sensor, and the capacitive grid displacement sensor comprises a fixed polar plate (6) and a movable polar plate (7); the fixed pole plate (6) is arranged on the bottom surface of the circuit board (17), the movable pole plate (7) is arranged on the movable loop bar (4), and the fixed pole plate (6) is positioned above the movable pole plate (7).

9. The digital periodontal pocket depth measurement device of claim 1, wherein: and a display screen for displaying data is arranged outside the shell (1).

10. The digital periodontal pocket depth measurement device of claim 1, wherein: the included angle between the central axis of the movable sleeve rod (4) and the central axis of the probe sleeve (11) is 60-80 degrees.