CN110495963B - Digital periodontal pocket depth measuring device - Google Patents

Abstract

The invention relates to a digital periodontal pocket depth measuring device which comprises a shell, a detection needle, a traction wire, a movable loop bar, a spring and a displacement sensor, wherein the shell is provided with a plurality of measuring heads; when the detection needle is continuously subjected to downward force after being abutted against the bottom of the periodontal pocket, the detection needle can apply 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 detecting needle leaves the bottom of the periodontal pocket, the detecting 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 detecting needle moves downwards along the probe sleeve. Through the cooperation between probe, pull wire, movable loop bar and the spring, with the degree of depth conversion of periodontal pocket movable loop bar's displacement, can acquire the measurement data of periodontal pocket degree of depth through the displacement of displacement sensor measurement movable loop bar, not only can realize periodontal pocket degree of depth measurement function, can also directly record the data of measurement and acquire electronic measurement data.

Description

Digital periodontal pocket depth measuring device

Technical Field

The invention relates to the technical field of medical equipment, in particular to a digital periodontal pocket depth measuring device.

Background

Periodontal pockets are pathologically deepened gingival sulcus, and are one of the most important clinical manifestations of periodontitis. The depth of the periodontal pocket is an important criterion for measuring whether the gum is healthy or not, and thus, periodontal pocket depth measurement is an indispensable step in gum treatment.

In the prior art, the depth of the periodontal pocket is generally measured by a mechanical periodontal pocket probe. The structure of the mechanical periodontal pocket probe mainly comprises a handle and a probe, and the measuring process of the mechanical periodontal pocket probe is as follows: the doctor holds the handle, stretches into the probe and slowly stretches into to the bottom of periodontal pocket behind the periodontal pocket, and when the probe butt in the bottom of periodontal pocket, reading on the reading probe, alright measure the degree of depth that obtains the periodontal pocket according to the reading.

There may be many periodontal pockets in the mouth of the human body, and each pocket needs to be recorded during the treatment. In the prior art, after the measurement is carried out through a mechanical periodontal pocket probe, the data are recorded one by a paper pen so as to record the corresponding conditions of all periodontal pockets; when the examination report is required 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 end 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. The doctor needs to repeatedly count and input the PC end to obtain the electronic measurement data, and the defects that the recording of the measurement data is inconvenient and the acquisition of the electronic measurement data is inconvenient exist.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a digital periodontal pocket depth measuring device which not only can realize the periodontal pocket depth measuring function, but also has the advantages of being convenient for recording measuring data and directly acquiring electronic measuring data.

The technical scheme for solving the technical problems is as follows: a digital periodontal pocket depth measuring device comprises a shell, a detection needle, a traction 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 detection needle, the other end of the traction wire is fixedly arranged at the front end of the movable loop bar, and the traction wire is in a tight state;

The rear end of the movable loop bar 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 protruding ring at the rear end of the movable loop bar;

When the detection needle is continuously subjected to downward force after being abutted against the bottom of the periodontal pocket, the detection needle can apply 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 wire, the elastic force of the spring drives the movable loop bar to move backwards, and the detection needle moves downwards along the probe sleeve;

The displacement sensor is arranged on the movable loop bar and is used for measuring the depth of periodontal pockets by measuring the displacement of the movable loop bar.

Compared with the prior art, the beneficial effects of the technical scheme are as follows: through the cooperation between probe, pull wire, movable loop bar and the spring, with the degree of depth conversion of periodontal pocket movable loop bar's displacement, can acquire the measurement data of periodontal pocket degree of depth through the displacement of displacement sensor measurement movable loop bar, not only can realize periodontal pocket degree of depth measurement function, can also directly record the data of measurement and acquire electronic measurement data.

Further, a direction adjusting guide wheel is further arranged at the front end of the shell, and the traction wire is wound on the direction adjusting guide wheel.

The beneficial effects of adopting above-mentioned technical scheme are: the front end of the shell is provided with the direction adjusting guide wheel, 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 greatest extent through the direction adjusting guide wheel, so that the measurement accuracy is improved.

Further, the detection 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 external wire body and an internal wire body by taking a contact part with 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 and the detection needle are mutually parallel; one end of the inner wire body is fixedly arranged at the front end of the movable loop bar, and the inner wire body is parallel to the central axis of the movable loop bar.

The beneficial effects of adopting above-mentioned technical scheme are: through being provided with ring portion for the contained angle between outside line body and the inside line body remains unchanged, at the in-process of measuring, is parallel to each other between outside line body and the probe, thereby guarantees as far as possible that the power of exerting on the probe can stabilize between 20-25g, thereby improves measurement accuracy.

Further, the needle bar portion comprises a thin needle bar portion and a thick needle bar portion, the thin needle bar portion and the thick needle bar portion are coaxially arranged, the thick needle bar portion is arranged at the upper end of the thin needle bar portion, and the circular ring portion is arranged at the upper end of the thick needle bar portion;

The probe needle is movably sleeved in the probe sleeve through the thin needle rod part, the inner diameter of the probe sleeve is larger than the outer diameter of the thin needle rod part, the inner diameter of the probe sleeve is smaller than the outer diameter of the thick needle rod part, and a limiting step is formed between the thin needle rod part and the thick needle rod part.

The beneficial effects of adopting above-mentioned technical scheme are: the needle rod part is divided into a thin needle rod part and a thick needle rod part, the inner diameter of the probe sleeve is larger than the outer diameter of the thin needle rod part, the inner diameter of the probe sleeve is smaller than the outer diameter of the thick needle rod part, the probe needle is movably sleeved in the probe sleeve through the thin needle rod part, and the probe needle can be prevented from being inserted into the probe sleeve too deeply through a limiting step formed between the thin needle rod part and the thick needle rod part.

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 sleeving the sleeving column in the sleeving hole; the front loop bar and the rear loop bar are detachably connected to each other.

The beneficial effects of adopting above-mentioned technical scheme are: the front shell of the rear shell is detachably connected with each other to form a shell, and the front loop bar and the rear loop bar are detachably connected with each other to form a movable loop bar, so that the whole measuring device forms a detachable front structure and a detachable rear structure, and is convenient to sterilize.

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

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

Further, 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; the inside of back casing is provided with the second direction through-hole, back loop bar activity cover is located in the second direction through-hole.

The beneficial effects of adopting above-mentioned technical scheme are: the front loop bar is limited in direction through the first guide through hole, the rear loop bar is limited in direction through the second guide through hole, the movable loop bar can move along the central axis of the shell, the movable loop bar is prevented from shaking left and right in the measuring process, and accordingly measuring accuracy is improved.

Further, 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 grating displacement sensor, and the capacitive grating displacement sensor 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 sleeve rod, and the fixed polar plate is positioned above the movable polar plate.

The beneficial effects of adopting above-mentioned technical scheme are: the displacement of the movable loop bar can be obtained by monitoring the capacitance value of the capacitive grating displacement sensor through the main control chip, so that the periodontal pocket depth is obtained.

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

The beneficial effects of adopting above-mentioned technical scheme are: the measured value is convenient to directly read.

Further, the included angle between the central axis of the movable loop bar and the central axis of the probe sleeve is 60-80 degrees.

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

Drawings

FIG. 1 is an overall schematic view of a digital periodontal pocket depth measuring device according to the present invention;

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

FIG. 3 is a schematic view of a casing and a direction adjusting guide wheel in a digital periodontal pocket depth measuring device according to the present invention;

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

FIG. 5 is a schematic view of a probe, a pull wire and a movable loop bar in a digital periodontal pocket depth measuring device according to the present invention;

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

FIG. 7 is a schematic view of a movable loop bar in a digital periodontal pocket depth measuring device according to the present invention;

FIG. 8 is a schematic view of a first guide through hole and a second guide through hole in a digital periodontal pocket depth measuring device according to the present invention;

FIG. 9 is a schematic diagram showing the relative positions of a stationary plate and a movable plate in a digital periodontal pocket depth measuring device according to the present invention;

FIG. 10 is a schematic circuit diagram of a main control chip and a capacitive grating displacement sensor in a digital periodontal pocket depth measuring device according to the present invention;

FIG. 11 is a schematic circuit diagram of a main control chip and a touch sensing electrode in a digital periodontal pocket depth measuring device according to the present invention;

fig. 12 is a schematic circuit diagram of a display screen in a digital periodontal pocket depth measuring device according to the present invention.

In the drawings, the list of components represented by the respective reference numerals is as follows:

The device comprises a shell 1, a detection needle 2, a traction wire 3, a movable sleeve rod 4, a spring 5, a fixed polar plate 6 and a movable polar plate 7;

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

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

A fine needle bar portion 211 and a coarse needle bar portion 212;

An outer wire body 31 and an inner wire body 32;

the device comprises a protruding ring 41, a front loop bar 42, a rear loop bar 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 more clear and clear, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or component to be 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," "second," and the like, 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 should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of the two components. When an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element 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. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present invention.

As shown in fig. 1 and 2, a digital periodontal pocket depth measuring device mainly includes: 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 parts, and the detecting needle 2, the traction wire 3, the movable loop bar 4, the spring 5, the displacement sensor and other parts are directly or indirectly arranged on the shell 1; in addition, the casing 1 also plays a role of facilitating hand holding and holding when a doctor operates.

The front end of the shell 1 is provided with a probe sleeve 11, 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 detection 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 tightening 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 sleeve rod 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 the protruding ring 41 at the rear end of the movable sleeve rod 4.

The digital periodontal pocket depth measuring device realizes the periodontal pocket depth measuring function through the mutual cooperation among the probe 2, the traction wire 3, the movable loop bar 4 and the spring 5. When the detection needle 2 is continuously subjected to downward force after being abutted against the bottom of the periodontal pocket, the detection needle 2 applies 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 sleeve rod 4 to compress the spring 5, and the movable sleeve rod 4 moves forwards; when the detecting needle 2 leaves the bottom of the periodontal pocket, the detecting 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 detecting needle 2 moves downwards along the probe sleeve 11. Based on the above structure, the periodontal pocket depth measuring function 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 periodontal pocket depth 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 backward movement trend, the movable sleeve rod 4 can tension the traction wire 3, the traction wire 3 is in a tight state, the traction wire 3 drives the detection needle 2, and the detection needle 2 is inserted into the probe sleeve 11 downwards. At the beginning of the measurement, the doctor holds the housing 1 and slowly inserts the probe 2 into the periodontal pocket after inserting the probe into the periodontal pocket. When the probe needle 2 is abutted 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 is abutted 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 in the direction of the probe sleeve 11; at this time, the probe needle 2 drives the movable sleeve rod 4 to move against the elastic force of the spring 5 through the traction rope, the spring 5 is further compressed, and the movable sleeve rod 4 moves forwards. When the probe sleeve 11 descends to a certain extent and then is abutted against the gum, the length of the probe needle 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 needle 2 is the depth of the periodontal pocket; the detection needle 2 sequentially drives the traction wire 3 and the movable loop bar 4 to move, 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 the displacement sensor, so that the depth of the periodontal pocket can be measured. After the measurement is completed, the doctor slowly takes out the detection needle 2 from the periodontal pocket, and the spring 5 which is compressed further before can be restored to the initial state at the moment because no abutting force exists between the bottom of the periodontal pocket and the detection needle 2, so that an expansion force is provided to drive the movable sleeve rod 4 to move backwards; further, the probe 2 is driven by the traction wire 3 to be inserted into the probe sleeve 11 again. In the present invention, for convenience of description and understanding, the main body of the digital periodontal pocket depth measuring device is the front side of the probe needle 2 and the rear side of the distal end of the housing 1.

The innovation point of the invention is that: the measuring device has the advantages that the measuring device is not provided with scales for reading on the detecting needle 2, but the depth of periodontal pockets is converted into the displacement of the movable sleeve rod 4 through the cooperation among the components such as the detecting needle 2, the traction wire 3, the movable sleeve rod 4 and the spring 5, the displacement of the movable sleeve rod 4 is measured by the displacement sensor, the measuring data of the periodontal pocket depth can be obtained, the periodontal pocket depth measuring function can be realized, the digital measuring data can be obtained directly, and the subsequent direct application is facilitated.

In order to adapt to the physiological structure of the oral cavity of the human body, in the invention, the central axis of the shell 1 and the movement direction of the probe needle 2 are not on the same straight line, namely, an included angle exists between the central axis of the movable sleeve rod 4 and the central axis of the probe sleeve 11, specifically, 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. Because the fixed setting of one end of pull wire 3 is on probe 2, and the other end is fixed to be set up in the front end of movable sleeve rod 4, and the direction of motion of movable sleeve rod 4 coincides with the axis of shell 1, consequently, at the in-process of measurement, pull wire 3 is not along rectilinear motion, but has certain bending transition angle, and pull wire 3 has great frictional force in this bending transition angle department, leads to the motion of parts such as probe 2 and movable sleeve rod 4 to be unsmooth easily, and then causes the influence to measurement accuracy.

As shown in fig. 3, in order to make the measurement more accurate, the innovation of the present invention is that: 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 front end of the shell 1 is provided with the direction adjusting guide wheel 12, the traction wire 3 is wound on the direction adjusting guide wheel 12, and the friction force born by the traction wire 3 at the bending transition angle can be reduced to the greatest 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 during the measurement of 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 gingiva 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 able to bottom out due to the blockage of other tissue. Whether the force is too large or too small, it 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 of the present invention is that: the probe needle 2 comprises a needle rod portion 21 and a circular ring portion 22, the circular ring portion 22 is fixedly arranged at the upper end of the needle rod portion 21, and the needle rod portion 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 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 outer wire 31 is fixedly disposed on the annular portion 22, and the outer wire 31 and the probe needle 2 are parallel to each other. One end of the inner wire body 32 is fixedly arranged at the front end of the movable sleeve rod 4, and the inner wire body 32 is parallel to the central axis of the movable sleeve rod 4

The purpose of the annular portion 22 is to enable the outer wire body 31 and the probe needle 2 to be parallel to each other. If the outer wire body 31 and the probe needle 2 are not parallel to each other by providing the circular ring portion 22, it is conceivable that the angle between the outer wire body 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 body 31 and the probe needle 2 gradually decreases. As the measurement proceeds, even if the force applied to the housing by the doctor is not changed, the force applied to the probe needle 2 on the pull wire 3 is changed nonlinearly due to the decomposition of the force in different directions, and the force applied to the probe needle 2 is increased more and more, so that it is difficult to ensure that the force applied to the probe needle 2 is maintained in the range of 20-25g, and the measurement accuracy is affected.

In the above preferred embodiment, the annular portion 22 is provided to maintain the angle between the outer wire 31 and the inner wire 32 constant, so that the outer wire 31 and the probe needle 2 are parallel to each other during the measurement process, thereby ensuring that the force applied to the probe needle 2 is as much as 20-25g, and improving the measurement accuracy.

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

The needle shaft portion 21 is divided into a thin needle shaft portion 211 and a thick needle shaft portion 212, the inner diameter of the probe sleeve 11 is larger than the outer diameter of the thin needle shaft portion 211, the inner diameter of the probe sleeve 11 is smaller than the outer diameter of the thick needle shaft portion 212, the probe 2 is movably sleeved in the probe sleeve 11 through the thin needle shaft portion 211, and a limit step formed between the thin needle shaft portion 211 and the thick needle shaft portion 212 can prevent the probe 2 from being inserted into the probe sleeve 11 too deeply. Otherwise, when the measuring device is in a natural state, the expansion force of the spring 5 can enable the movable sleeve rod 4 to have a backward movement trend, the movable sleeve rod 4 further tightens the traction wire 3, so that the traction wire 3 is in a tight state, and the traction wire 3 drives the probe 2 to be inserted into the probe sleeve 11 too deeply downwards, so that the lower end of the probe 2 is exposed too much and is easy to damage. By the arrangement, the step formed between the thin needle bar 211 and the thick needle bar can be clamped outside the probe sleeve 11, so that the limiting effect is achieved, the lower end of the probe 2 is prevented from being exposed too much, and the probe 2 is prevented from being damaged.

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 rod 4 is divided into a front rod 42 and a rear rod 43, and the front rod 42 and the rear rod 43 are detachably connected to each other. Wherein, 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 sleeve joint hole, the front end of the rear shell 14 is provided with a sleeve joint column, and the rear shell 14 is detachably arranged at the rear end of the front shell 13 by being sleeved in the sleeve joint hole through the sleeve joint column.

When the measuring device is used, the probe needle 2 is required to be placed in the oral cavity of a patient, and the front half part of the probe needle 2, the front half part of the movable sleeve rod 4 and the traction wire 3 inevitably enter the oral cavity of the patient. Since the oral cavity is rich in bacteria, it is highly necessary to sterilize the present measuring device 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 sterilizing the measuring device, and therefore, the measuring device is inconvenient to sterilize.

The above preferred embodiment solves the problem of inconvenient sterilization. The rear housing 14 and the front housing 13 are detachably connected to each other to form the housing 1, and the front loop bar 42 and the rear loop bar 43 are detachably connected to each other to form the movable loop bar 4, so that the entire measuring apparatus forms two structures of detachable front and rear. Because in this measuring device, electronic component sets up in the rear entirely, when needs disinfect, directly with back casing 14 and preceding casing 13, preceding loop bar 42 and back loop bar 43 dismantle each other, only need with preceding casing 13, preceding loop bar 42 together with the pull wire 3 disinfect can, and then parts such as casing 14 and back loop bar 43 do not contact the inside of patient's oral cavity then need not disinfect, so, just can not influence the electronic component in the measuring device, have convenient sterile advantage.

As shown in fig. 7, in order to achieve the detachable connection between the front loop bar 42 and the rear loop bar 43, a first connecting magnetic block 44 is provided at the rear end of the front loop bar 42, and a second connecting magnetic block 45 is provided at the front end of the rear loop bar 43; the rear loop bar 43 is detachably disposed at the rear end of the front loop bar 42 through magnetic connection between the first connection magnetic block 44 and the second connection magnetic block 45. In the above manner, the detachable connection between the front loop bar 42 and the rear loop bar 43 can be achieved with a simple structure.

As shown in fig. 8, a first guiding through hole 15 is provided in the front movable loop bar 4, and the front loop bar 42 is movably sleeved in the first guiding through hole 15; the rear housing 14 is provided with a second guiding through hole 16 inside, and the rear loop bar 43 is movably sleeved in the second guiding through hole 16. The front loop bar 42 is limited in direction through the first guide through hole 15, the rear loop bar 43 is limited in direction through the second guide through hole 16, so that the movable loop bar 4 can move along the central axis of the shell 1, the movable loop bar 4 is prevented from shaking left and right in the measuring process, and the measuring precision is improved.

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

The working principle of the capacitive grating displacement sensor is as follows: in the measuring process, the movable loop bar 4 moves with the movable pole plate 7, 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 changed relative area 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 is changed, the capacitance value is changed along with the change, and the displacement of the movable loop bar 4 can be obtained by monitoring the capacitance value of the capacitance displacement sensor through the main control chip, so that the periodontal pocket depth is obtained.

Specifically, the spacing between the fixed plate 6 and the movable plate 7 is 0.2mm. 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 parallel, and each group of transmitting electrodes is provided with 8 transmitting electrodes. The movable electrode plate 7 is provided with reflective electrodes and shielding electrodes which are mutually insulated in turn. One pole pitch on the movable plate 7 corresponds to a set of emitter electrodes. An excitation signal with the same amplitude, frequency and phase is added to each group of emission electrodes with the same position, and the phase difference between the excitation signals on 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 at the receiving electrode varies with the position between the transmitting electrode and the reflecting electrode, due to capacitive coupling and charge transfer effects of the reflecting 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 optimized wireless MCU for low power consumption and proprietary 2.4GHz application, and has a high-performance and low-power 8051 microcontroller core with a code prefetching 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, an 8-channel and a configurable resolution; the CC2541F256 chip has 2 powerful universal asynchronous receiver/transmitter (UART) supporting several serial protocols, 23 universal I/O pins and I2C interface, and the Bluetooth 4.0 communication protocol is integrated internally.

The CW5680 chip has four frequency choices, a built-in RC oscillator, a normal measurement range of 0-9999.99mm and a measurement accuracy of 0.01mm. The pins PA1-PA8 of CW5680 chip are connected to the transmitting electric plate of fixed polar plate 6 in sequence, the CSI pin of CW5680 chip is connected to the receiving electrode, SCK, D0-D3 are connected to P1_0-P1_4 of main control chip CC2541F256 respectively. The main control chip can obtain the relative displacement 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, and the displacement of the movable sleeve rod 4 can be obtained, thereby obtaining the periodontal pocket depth. Meanwhile, the main control chip transmits data to the PC end through Bluetooth to save records.

In the prior art, it is generally determined by subjective experience of a doctor whether the probe 2 is in place. The doctor applies downward force to the probe 2 through the shell 1, and when the reaction force applied to the probe 2 is not large, the doctor judges that the probe 2 is not in place; when the reaction force received by the probe needle 2 is large, the doctor judges that the probe needle 2 is already in place. This way there is a large error, which is liable to cause a situation where the displacement amount of the movable socket lever 4 is regarded as the periodontal pocket depth when the probe needle 2 is not in place, resulting in a very large measurement error.

Preferably, a touch sensing electrode is disposed on the lower end surface of the probe sleeve 11, and the touch sensing electrode is used for judging whether the probe needle 2 is in place, so as to determine the displacement of the movable sleeve rod 4 at the corresponding moment, namely the periodontal pocket depth.

As shown in fig. 11, specifically, the touch sensing electrode is connected to a touch sensor through a wire, and the touch sensor is connected to the main control chip. Specifically, the touch sensor is a TTP223 chip, the touch sensing electrode is connected to the CIN pin of the TTP223 chip through a wire, and meanwhile, the output pin OUT of the TTP223 chip is connected to the p1_5 pin of the master control chip. When the touch sensing electrode touches the gum, the touch sensor detects that the capacitance is transformed, and outputs a high level, otherwise, the high level is kept, and the main control chip judges whether the probe 2 is in place or not by detecting the output state of the touch sensor, so that the measurement error is greatly reduced.

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

As shown in fig. 12, a DSS1306G chip is employed as the display screen. The screen resolution of the DSS1306G chip is 128 x 60, and the DSS1306G chip performs data interaction with the main control chip through the 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 by the main control chip, so that the data display function can be realized.

Preferably, the casing 1 is further provided with four gum index buttons, and the four gum index buttons are respectively connected with the main control chip. The gum index reflects the gum condition, reflects changes in the color and texture of the gum, and bleeding tendency. Typically on a scale of from 0 to 3, where 0 represents gingival health; 1 represents low inflammation of gums, slight change of the color of gums and slight edema, no bleeding in probing; 2 represents inflammation in the gums, red gums, bright edema and bleeding detection; 3 represents serious inflammation of gums, obvious redness and swelling of gums or ulcers, and tendency to automatic bleeding.

The specific operation process is as follows: when a doctor measures a certain periodontal pocket, the doctor performs visual inspection on the gums around the periodontal pocket, for example, when the doctor considers that the gum index at the position is 0, the doctor presses a corresponding gum index button, the gum index button sends a level signal to a main control chip, and the main control chip records the gum index in a correlated manner when recording periodontal pocket information.

In the process of measuring the periodontal pocket depth, a doctor observes the gum state through visual inspection, so that the gum index is obtained, and the actual gum index is recorded through four gum index buttons, so that the corresponding gum index can be recorded while the periodontal pocket depth is measured, and the operation is more convenient.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (7)

1. A digital periodontal pocket depth measurement device, characterized in that: 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 front end of the shell (1) is provided with a probe sleeve (11), 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 detection 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 sleeve rod (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 sleeve rod (4);

when the detection needle (2) is continuously subjected to downward force after being abutted against the bottom of the periodontal pocket, the detection needle (2) can apply 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 sleeve rod (4) to compress the spring (5), and the movable sleeve rod (4) moves forwards; when the detection needle (2) leaves the bottom of the 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 loop bar (4) and is used for measuring the depth of the periodontal pocket by measuring the displacement of the movable loop bar (4);

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 detection 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 with 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) and the detection needle (2) are mutually parallel; one end of the inner wire body (32) is fixedly arranged at the front end of the movable loop bar (4), and the inner wire body (32) is parallel to the central axis of the movable loop bar (4);

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) through sleeving the sleeving column in the sleeving hole; the front loop bar (42) and the rear loop bar (43) are detachably connected with each other.

2. The digital periodontal pocket depth measurement device of claim 1, wherein: the needle bar (21) comprises a thin needle bar (211) and a thick needle bar (212), the thin needle bar (211) and the thick needle bar (212) are coaxially arranged, the thick needle bar (212) is arranged at the upper end of the thin needle bar (211), and the circular ring (22) is arranged at the upper end of the thick needle bar (212);

The probe 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).

3. The digital periodontal pocket depth measurement device of claim 1, wherein: the rear end of the front loop bar (42) is provided with a first connecting magnetic block (44), and the front end of the rear loop bar (43) is provided with a second connecting magnetic block (45); the rear loop bar (43) is detachably arranged at the rear end of the front loop bar (42) through magnetic force connection between the first connecting magnetic block (44) and the second connecting magnetic block (45).

4. The digital periodontal pocket depth measurement device of claim 1, wherein: a first guide through hole (15) is formed in the front shell (13), and the front sleeve rod (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) activity cover is located in second direction through-hole (16).

5. 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 grating displacement sensor, and the capacitive grating 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).

6. The digital periodontal pocket depth measurement device of claim 1, wherein: the shell (1) is also provided with a display screen for displaying data.

7. 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.