阅读说明：本技术 咀嚼肌训练仪 (Masticatory muscle training instrument ) 是由 黄秀根 窦祖林 黄星 于 2021-06-16 设计创作，主要内容包括：本发明提供了一种咀嚼肌训练仪,包括：一对用于支撑患者上、下颌骨的支撑件,由丝杆、螺母以及导向装置所组成的丝杆螺母机构,顶、底两侧分别连接一所述支撑件的开合机构,连接所述丝杆、并驱动丝杆正、反向交替旋转的动力总成；所述螺母旋接丝杆时被所述导向装置限制转动,在丝杆的转动下,螺母沿导向装置所限定的行进轨迹移动；所述开合机构与螺母活动连接,在丝杆正向或反向旋转时,螺母驱动开合机构使一对支撑件扩张或收拢,所述上、下颌骨随一对支撑件的扩张或收拢而开合。咀嚼肌训练仪的动力总成通过驱动丝杆螺母机构的螺母使得开合机构将一对支撑件扩张或收拢,进而使得上、下颌骨开合。(The invention provides a masticatory muscle training instrument, which comprises: the device comprises a pair of supporting pieces for supporting the upper jaw and the lower jaw of a patient, a screw rod and nut mechanism consisting of a screw rod, a nut and a guide device, an opening and closing mechanism with the top and the bottom connected with the supporting pieces respectively, and a power assembly connected with the screw rod and driving the screw rod to rotate forwards and reversely alternately; the nut is limited by the guide device to rotate when being screwed with the screw rod, and the nut moves along the travel track limited by the guide device under the rotation of the screw rod; the opening and closing mechanism is movably connected with the nut, when the screw rod rotates forwards or reversely, the nut drives the opening and closing mechanism to expand or furl the pair of supporting pieces, and the upper jaw bone and the lower jaw bone are opened and closed along with the expansion or furl of the pair of supporting pieces. The power assembly of the masticatory muscle training instrument enables the opening and closing mechanism to expand or furl the pair of supporting pieces through the nut of the driving screw rod nut mechanism, and then enables the upper jaw and the lower jaw to be opened and closed.)

1. A masticatory muscle training apparatus, comprising: a pair of supporting pieces (1) for supporting the upper and lower jaws of a patient, a screw rod and nut mechanism (3) consisting of a screw rod (31), a nut (32) and a guiding device (33), an opening and closing mechanism (4) respectively connected with the supporting pieces (1) at the top and the bottom, and a power assembly (8) connected with the screw rod (31) and driving the screw rod (31) to rotate forward and backward alternately;

the nut (32) is limited to rotate by the guide device (33) when being screwed on the screw rod (31), and the nut (32) moves along a travel track defined by the guide device (33) under the rotation of the screw rod (31);

the opening and closing mechanism (4) is movably connected with the nut (32), when the screw rod (31) rotates forwards or reversely, the nut (32) drives the opening and closing mechanism (4) to expand or furl the pair of supporting pieces (1), and the upper jaw and the lower jaw are opened and closed along with the expansion or furl of the pair of supporting pieces (1).

2. A masticatory muscle training apparatus according to claim 1 wherein the guide means (33) is a rectangular frame with a support hole (330) centrally located in each of the short sides; the rod body of the screw rod (31) is bounded by a point close to the middle point, screw teeth (311) are uniformly distributed on the surface of one side of the rod body, the surface of the other side of the rod body is smooth, two support columns (312) which are coaxial with the screw rod (31) and are used for being inserted into the support holes (330) are arranged at two tail ends of the screw rod (31), and a clamp spring groove (314) for placing a clamp spring is arranged at the smooth part of the screw rod (31); the opening and closing mechanism (4) comprises four supporting bars (41), two supporting bars (42) and a supporting point (34) which is internally penetrated by a through hole (303) for sleeving the smooth part of the screw rod (31), the four supporting bars (41) and the two supporting bars (42) are movably connected with each other to form a hexagon, wherein the two edge strips (42) are respectively used as the top edge and the bottom edge of the hexagon and are used for fixing the supporting piece (1), the supporting point (34) is movably connected with the tail ends of the two supporting bars (41) on the right side of the hexagon, the tail ends of the two supporting bars (41) on the left side of the hexagon are movably connected with the nut (32), a buffer spring (45) which is penetrated by the smooth part of the screw rod (31) is arranged between the supporting point (34) and the right short side of the guide device (33), and the left side of the supporting point (41) is tightly abutted against a clamp spring arranged on the clamp spring groove (314).

3. A masticatory muscle training apparatus according to claim 2, wherein the nut (32) and the fulcrum (34) each comprise a cylindrical body (301) internally penetrated by a through hole (303), two internally threaded cylinders (302) respectively provided on the side walls near to both sides of one end of the cylindrical body (301), the axes of the two internally threaded cylinders (302) being perpendicular to the axis of the cylindrical body (301); the inner side wall of the through hole (303) of the nut (32) is provided with an internal thread corresponding to the screw thread (311) of the screw rod (31), the inner side wall of the cylinder (301) of the fulcrum (34) is smooth, and a supporting part (340) used for abutting against the buffer spring (45) is arranged at the tail end of the cylinder (301) facing one side of the short side of the guide device (33).

4. A masticatory muscle training apparatus according to claim 2 or 3 further comprising a housing (7), wherein the locomotion assembly (8) comprises a digital motor (81) arranged inside the housing (7), a variable speed gearbox (82) connected to the digital motor (81), and a transmission member (83) connected at one end to the variable speed gearbox (82) and extending outside the housing (7); the other end of the transmission piece (83) is provided with a square joint (831), the center of the surface of the tail end of the support column (312) on the side of the smooth part of the screw rod (31) is provided with a square groove (313) corresponding to the square joint (831), and the square groove (313) and the square joint (831) are in interference fit.

5. A mastic muscle training apparatus according to claim 4, wherein the transmission member (83) comprises a flexible wire rope (832), a protection spring (833) through which the flexible wire rope (832) passes, an inner hollow hose (834) which surrounds the spring, the square joint (831) is provided at one end of the flexible wire rope (832), and the other end of the flexible wire rope (832) is connected to the speed change gear box (82).

6. Masticatory muscle training apparatus according to claim 5, further comprising an automatic control system (9) arranged inside the casing (7) comprising:

a sensor module (92) including a distance sensor (922) for detecting an expansion stroke width of the pair of support members (1) and a pressure sensor (921) for detecting an occlusal force exerted by the patient;

the preset value input module inputs the upper limit value and the lower limit value of the allowable expansion stroke width and the upper limit value and the lower limit value of the allowable releasing bite force through a key (73) arranged on the surface of the machine shell (7);

the micro-control unit (94) receives the expansion stroke width and the occlusion force detected by the sensor module (92), and controls the power assembly (8) to rotate forwards or backwards according to whether the stroke width and the occlusion force reach an upper limit value or a lower limit value;

and the liquid crystal display screen (95) is embedded on the surface of the shell and is used for displaying the stroke width measured by the distance sensor (922), the current pressure of the pressure sensor (921), the upper limit value and the lower limit value of the allowed expansion stroke width and the upper limit value and the lower limit value of the allowed occlusal force.

7. Masticatory muscle training apparatus according to claim 6, wherein the micro control unit (94) is in wired communication with the sensor module (92), part of the signal wires connecting the micro control unit (94) and the sensor module (92) are wound around the outer surface of the inner hollow tube (834), the transmission member (83) further comprises an outer hollow tube (835) wrapping the signal wires, two data wire plugs (836) fixed to both ends of the outer hollow tube (835) for connecting with the signal wires; a pin of the data line plug (836) penetrates through the short side of the guide device (33) and is connected with the pressure sensor (921) and the pressure film resistor (924) through signal lines; the other data plug penetrates through the shell (7) and is connected with the micro control unit (94) through a signal line.

8. Masticatory muscle training aid according to claim 7, wherein the support element (1) has a bite (13) at its left end and a right end rotatably connected to the right edge of the edge strip (42) by the shaft (2), wherein the pressure sensor (921) is arranged between the support element (1) and the edge strip (42), and wherein the support element (1) presses against the edge strip (42) in use to press the pressure sensor (921).

9. A masticatory muscle training aid according to claim 7, wherein the distance sensor (922) comprises a pair of internally hollow tubular posts (923) disposed on opposite sides of the strips (42), the pair of tubular posts (923) on one strip (42) corresponding to the pair of tubular posts (923) on the other strip (42), a pressure film resistor (924) affixed to the inner bottom wall of the tubular posts (923), and a pair of test springs (925) having ends respectively embedded in the opposite tubular posts (923) on the two strips (42), the test springs (925) abutting against the pressure film resistor (924).

10. Masticatory muscle training apparatus according to claims 7-9, further comprising two nuts (10), each of which is penetrated by the transmission member (83) and covers the two data plugs, wherein the short sides of the guiding means (33) where the pins of the data plugs penetrate and the housing (7) where the pins of the data plugs penetrate are provided with external threaded pipes (20) corresponding to the nuts (10).

Technical Field

The invention relates to a rehabilitation medical instrument, in particular to a masticatory muscle training instrument.

Background

Nasopharyngeal carcinoma is one of the most common malignant tumors in China, and radiation therapy is mainly used. But mouth opening difficulty is one of the common complications of radiotherapy, the incidence rate can reach 58.5 percent, the incidence rate of severe mouth opening difficulty is 7.1 percent, especially after DT40Gy/4W, the incisor space begins to shrink, the dose is increased and aggravated along with the prolonging of radiotherapy time, and the bilateral temporomandibular joint is subjected to multi-dose radiation, so that joint hardening and chronic radioactive fibrosis of masticatory muscles are caused to block joint movement and malfunction of the masticatory muscles.

Masticatory muscle dysfunction includes the clinical symptom of restricted mouth opening, as shown in figure 1, which shows a schematic view of the anatomy of the masticatory muscle. As can be seen, the masseter has four pairs of masseter muscle 101, temporalis muscle 102, lateral pterygoid muscle 103 and medial pterygoid muscle 104, and contraction of the masseter muscle 101, temporalis muscle 102 and medial pterygoid muscle 104 can lift the mandible to realize the occlusion, so that the masseter muscle 101, temporalis muscle 102 and medial pterygoid muscle 104 are the occlusion muscles; the lateral pterygoid muscles 103 contract simultaneously, advancing the mandible and participating in the mouth opening, so that the lateral pterygoid muscles 103 are mouth opening muscles; contraction of lateral external pterygoid muscle 103, which turns the mandible to the opposite side; the posterior fibers of the temporal muscle 102 contract, pulling the mandible posteriorly. Since the strength of the obturator muscle is greater than that of the tensor muscle, the natural posture of the mandibular joint is closed. In the case of the radioactive masticatory muscle injury, contraction is difficult due to fibrosis of the pterygoid externus muscle 103, and it is difficult for the patient to open the mouth on the premise that the amount of the force of the obturator muscle is larger than that of the mouth opening muscle.

Currently, with the development of social economy and the improvement of living standard of people, people pursue the change of concept to the rehabilitation living quality, nearly all three hospitals are provided with a rehabilitation department outpatient service and a treatment room at present, but the rehabilitation treatment is different from other departments, the patients need to be treated by means of rehabilitation medical devices, at present, aiming at the symptom of restricted mouth opening caused by masticatory muscle dysfunction, the rehabilitation treatment is mainly carried out by the way of manual stretching, and no proper rehabilitation medical device is used for the rehabilitation treatment of the patients.

Disclosure of Invention

The invention aims to provide a masticatory muscle training instrument, which aims to provide rehabilitation training for patients with masticatory muscle dysfunction with limited mouth opening.

In order to achieve the above object, the present invention adopts the following technical solutions.

A masticatory muscle training apparatus, comprising: the device comprises a pair of supporting pieces for supporting the upper jaw and the lower jaw of a patient, a screw rod and nut mechanism consisting of a screw rod, a nut and a guide device, an opening and closing mechanism with the top and the bottom connected with the supporting pieces respectively, and a power assembly connected with the screw rod and driving the screw rod to rotate forwards and reversely alternately;

the nut is limited by the guide device to rotate when being screwed with the screw rod, and the nut moves along the travel track limited by the guide device under the rotation of the screw rod;

the opening and closing mechanism is movably connected with the nut, when the screw rod rotates forwards or reversely, the nut drives the opening and closing mechanism to expand or furl the pair of supporting pieces, and the upper jaw bone and the lower jaw bone are opened and closed along with the expansion or furl of the pair of supporting pieces.

The power assembly of the masticatory muscle training instrument enables the opening and closing mechanism to expand or furl the pair of supporting pieces through the nut of the driving screw rod nut mechanism, and then enables the upper jaw and the lower jaw to be opened and closed.

The technical scheme can be further improved as follows.

As a further improvement, the guide device is a rectangular frame body, and the centers of two short sides of the rectangular frame body are provided with a supporting hole; the rod body of the screw rod is bounded by a point close to the middle point, screw teeth are uniformly distributed on the surface of one side of the rod body, the surface of the other side of the rod body is smooth, and two supporting columns which are coaxial with the screw rod and are used for being inserted into the supporting holes are arranged at the two tail ends of the screw rod; mechanism includes four strakes, two strakes and an inside fulcrum that is run through by a through-hole that is used for cup jointing the smooth portion of lead screw, four the strake is with two strakes swing joint each other and be the hexagon, and wherein two strakes are all used for fixing as hexagonal topside and base respectively support piece, the terminal swing joint of two strakes on fulcrum and hexagon right side, two left strakes of hexagon end then with nut swing joint, in set up a buffer spring who is passed by the smooth portion of lead screw between fulcrum and guider's the right side minor face.

According to the improvement, when the screw rod rotates reversely, the nut translates leftwards along the guide device to pull the two edge strips connected with the nut to be folded, the two edge strips positioned on the top side and the lower side are respectively folded under the support of the buffer spring to the fulcrum by utilizing the instability of the hexagon, so that the two supporting pieces are folded, and similarly, when the screw rod rotates forwards, the two supporting pieces are expanded.

As a further improvement, the power assembly comprises a digital motor arranged in the casing, a speed change gear box connected with the digital motor, and a transmission member, the tail end of the transmission member is connected with the speed change gear box and extends out of the casing; the other end of the transmission piece is provided with a square joint, the center of the surface of the tail end of the support column on the side of the smooth part of the screw rod is provided with a square groove corresponding to the square joint, and the square groove and the square joint are in interference fit.

The improvement is that the transmission part drives the screw rod to rotate forwards or backwards by the forward rotation or reverse rotation of the digital motor and the control of the rotating speed output by the gearbox.

As a further improvement, the transmission part comprises a flexible steel wire rope, a protection spring penetrated by the flexible steel wire rope and an inner layer hollow hose wrapping the spring, the square joint is arranged at one end of the flexible steel wire rope, and the other end of the flexible steel wire rope is connected with the speed change gear box.

The improvement, through speed change gear case output steering power for flexible wire rope, and make the lead screw rotate through flexible wire rope, the patient of being convenient for places digital motor and speed change gear case in the power assembly on the desk when using this masticatory muscle training appearance, alleviate patient's mandibular burden, the head also can freely move about simultaneously and can not pass digital motor and the speed change gear case in the power assembly on the desktop, in addition because protection spring is wrapping up flexible wire rope, even crooked flexible wire rope that can not influence its inside rotates.

As a further improvement, the automatic control system is arranged in the casing and comprises:

a sensor module including a distance sensor for detecting an expansion stroke width of the pair of support members and a pressure sensor for detecting an occlusal force exerted by the patient;

the preset value input module inputs the upper limit value and the lower limit value of the allowable expansion stroke width and the upper limit value and the lower limit value of the allowable applied occlusal force through a key arranged on the surface of the shell;

the micro control unit is used for receiving the expansion stroke width and the occlusal force detected by the sensor module and controlling the power assembly to rotate forwards or backwards according to whether the stroke width and the occlusal force reach an upper limit value or a lower limit value;

and the liquid crystal display screen is embedded on the surface of the shell and is used for displaying the stroke width measured by the distance sensor, the current pressure of the pressure sensor, the upper limit value and the lower limit value of the allowed expansion stroke width and the upper limit value and the lower limit value of the allowed occlusal force.

In the above improvement, the control logic of the micro control unit to the powertrain is as follows:

the micro control unit controls the power assembly to rotate forward to expand the pair of supporting pieces, receives the expansion stroke width detected by the distance sensor and judges whether the expansion stroke width reaches an upper limit value, if so, the micro control unit controls the power assembly to rotate reversely, and otherwise, the micro control unit continues to control the power assembly to rotate forward;

the micro control unit controls the power assembly to rotate reversely to fold the pair of supporting pieces, receives the expansion stroke width detected by the distance sensor, judges whether the expansion stroke width reaches a lower limit value, controls the power assembly to rotate forwardly if the expansion stroke width reaches the lower limit value, and continues to control the power assembly to rotate reversely if the expansion stroke width does not reach the lower limit value

In the process that the micro control unit controls the power assembly to rotate in the forward direction, a patient can apply an occlusal force to the support piece to exercise the masseter, meanwhile, the micro control unit receives the occlusal force detected by the pressure sensor and judges whether the occlusal force reaches an upper limit value, if so, the micro control unit controls the power assembly to rotate in the reverse direction, otherwise, the micro control unit continues to control the power assembly to rotate in the forward direction;

and in the process that the micro control unit controls the power assembly to rotate reversely, the micro control unit receives the occlusal force detected by the pressure sensor and judges whether the occlusal force reaches a lower limit value, if so, the micro control unit controls the power assembly to rotate forwardly, and otherwise, the micro control unit continues to control the power assembly to rotate reversely.

As a further improvement, the micro control unit and the sensor module are in wired communication, part of signal wires for communicating the micro control unit and the sensor module are wound on the outer surface of the inner layer hollow hose, the transmission part further comprises an outer layer hollow hose for wrapping the signal wires, and two data wire plugs which are respectively fixed at two ends of the outer layer hollow hose and are used for being connected with the signal wires; a pin of the data line plug penetrates through the short side of the guide device and is connected with the pressure sensor and the pressure film resistor through signal lines; and the other data plug penetrates through the shell and is connected with the micro control unit through a signal wire.

Above-mentioned improvement adopts wired communication can reduce the manufacturing cost of this masticatory muscle training appearance, through wrapping up the signal line between inner hollow hose and outer hollow hose, can effectively protect the signal line, and flexible wire rope's rotation also can not cause the damage to the signal line simultaneously.

As a further improvement, the left end of the supporting piece is an occlusion part, the right end of the supporting piece is rotatably connected with the right edge of the edge strip through the shaft rod, the pressure sensor is arranged between the supporting piece and the edge strip, and the supporting piece is tightly attached to the edge strip to extrude the pressure sensor in a use state.

According to the improvement, when the upper jaw and the lower jaw of a patient are opened or closed, the supporting piece can extrude the pressure sensor, and then the current occlusal force can be measured.

As a further improvement, the distance sensor comprises a pair of hollow tubular columns arranged on the opposite sides of the two edge strips, a pair of tubular columns on one edge strip corresponds to a pair of tubular columns on the other edge strip, the distance sensor further comprises a pressure film resistor attached to the inner bottom wall of the tubular columns, and a pair of test springs with two tail ends respectively embedded into the two opposite tubular columns on the two edge strips, and the test springs tightly support the pressure film resistor.

According to the improvement, the test spring can repeatedly extrude the pressure film resistor in the opening and closing processes of the two supporting pieces, and the expansion stroke width between the two supporting pieces can be measured through the resistance value change of the pressure film resistor.

As a further improvement, the device also comprises two screw caps which are penetrated by the transmission part and respectively cover the two data plugs, and the short sides of the guiding devices are penetrated by the pins of the data plugs and the parts of the shell penetrated by the pins of the data plugs are provided with external threaded pipes corresponding to the screw caps.

Above-mentioned improvement, through directly screwing two nuts respectively on two external screw thread pipes that correspond, can realize the installation of driving medium and the fixed of signal line, the patient's dismouting of being convenient for is carried with the dress package.

The masticatory muscle training instrument provided by the invention has the following beneficial effects:

(1) the upper jaw and the lower jaw are opened and closed along with the expansion or the furling of the pair of supporting pieces through the continuous positive and reverse alternate rotation of the power assembly and the matching of the screw rod nut mechanism and the opening and closing mechanism, so that the lateral pterygoid muscle connecting the upper jaw and the lower jaw continuously contracts under the action of external force, and the strength of the lateral pterygoid muscle is trained.

(2) Through the automatic control system, the patient can set proper training intensity, and meanwhile, if the patient exerts force improperly so that the current training exceeds the preset training intensity, the automatic control system judges by using data fed back by the sensor module and prevents the muscle from being pulled due to the fact that the patient exerts force excessively through reversing the motor, so that the patient can be ensured to train safely;

(3) the opening and closing mechanism is controlled to expand or close the two support rods through the nuts of the feed screw nut mechanism, the structure is simple, and stable support under different expansion stroke widths can be guaranteed.

Drawings

In order to more clearly explain the technical solution of the present invention, the drawings used in the embodiments will be briefly described below.

FIG. 1 is a schematic view of the anatomy of a masticatory muscle;

FIG. 2 is a perspective view showing the overall structure of the masticatory muscle training apparatus;

FIG. 3 is an exploded view of the structure of the feed screw nut mechanism;

FIG. 4 is a schematic structural view of the movable connection between the feed screw and nut mechanism and the opening and closing mechanism;

FIG. 5 is an exploded view of the structure of the opening and closing mechanism;

FIG. 6 is a schematic view of a nut and a fulcrum;

FIG. 7 is an exploded view of a portion of the structure of the support member and edge strip;

FIG. 8 is a schematic structural view of the combination of the feed screw nut mechanism and the opening and closing mechanism with the two support members in the closed state;

FIG. 9 is a schematic structural view of the combination of the feed screw nut mechanism and the opening and closing mechanism with the two support members in an expanded state;

FIG. 10 is an external view of a housing containing an automatic control system;

FIG. 11 is a schematic view of the interior of the housing;

FIG. 12 is a circuit configuration diagram of the automatic control system;

FIG. 13 is a schematic view of a specific installation position of the pressure sensor;

FIG. 14 is a schematic view of the inner side of the straight piece of the edge strip;

FIG. 15 is a schematic view of the internal structure of the transmission member;

FIG. 16 is an overall view of the transmission member.

To facilitate an understanding of the invention, the corresponding numbering of the components and/or features found in the drawings is provided as follows:

101. a masseter muscle; 102. the temporal muscle; 103. the lateral pterygoid muscle; 104. the internal pterygoid muscle; 1. a support member; 11. a side plate; 12. a straight plate; 13. an engaging portion; 14. a rotating shaft hole; 2. a shaft lever; 3. a feed screw nut mechanism; 31. a screw rod; 311. thread teeth; 312. a support column; 313. a square groove; 314. a clamp spring groove; 32. a nut; 33. a guide device; 330. a support hole; 34. a fulcrum; 340. a support portion; 301. a barrel; 302. an internal threaded barrel; 303. a through hole; 4. an opening and closing mechanism; 41. branch; 411. a side surface; 412. a straight surface; 42. edging; 421. a side panel; 422. straightening; 43. a keyhole; 44. a pin hole; 45. a buffer spring; 5. a latch rod; 6. a screw; 7. a housing; 71. an upper cover; 72. a lower cover; 73. pressing a key; 74. a DC power supply hole; 8. a power assembly; 81. a digital motor; 82. a change speed gear box; 83. a transmission member; 831. a square joint; 832. a flexible wire rope; 833. a protection spring; 834. an inner layer hollow hose; 835. an outer layer hollow hose; 836. a data line plug; 9. an automatic control system; 91. a printed circuit board; 92. a sensor module; 921. a pressure sensor; 922. a distance sensor; 923. a pipe string; 924. a pressure film resistor; 925. testing the spring; 93. a preset value input module; 94. a micro control unit; 95. a liquid crystal display screen; 10. a nut; 20. an externally threaded tube.

It should be understood that the drawings are not necessarily drawn to scale. It is obvious that the above-mentioned figures are only some embodiments of the invention, and that for a person skilled in the art, without inventive effort, further figures can be obtained with reference to these figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and the technical solutions in the embodiments may be combined with each other, but it is necessary to be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

It should be noted that if directional indications (such as … …, which is up, down, left, right, front, back, top, bottom, inner, outer, vertical, transverse, longitudinal, counterclockwise, clockwise, circumferential, radial, axial) are provided in the embodiments of the present invention, the directional indications are only used for explaining the relative position relationship, motion condition, etc. of the components at a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are changed accordingly.

Referring to fig. 2, a perspective view of an overall structure of a masticatory muscle training device according to an exemplary embodiment of the invention is shown. As can be seen from the figure, the masticatory muscle training instrument comprises a pair of supporting members 1 for supporting the upper and lower jaws of a patient, a screw-nut mechanism 3 consisting of a screw 31, a nut 32 and a guiding device 33, an opening-closing mechanism 4 connected with one of the supporting members 1 at the top and bottom sides respectively, and a power assembly 8 connected with the screw 31 and driving the screw 31 to rotate forward and backward alternately, wherein the power assembly 8 is positioned in a casing 7, a transmission member 83 of the power assembly 8 extends out of the casing 7 and is connected with the screw-nut mechanism 3 to drive the screw 31 to rotate forward or backward; the nut 32 is limited to rotate by the guide device 33 when being screwed on the screw rod 31, and under the rotation of the screw rod 31, the nut 32 moves along the travel track defined by the guide device 33; the opening and closing mechanism 4 is movably connected with the nut 32, when the screw rod 31 rotates forwards or reversely, the nut 32 drives the opening and closing mechanism 4 to expand or furl the pair of supporting pieces 1, and the upper jaw and the lower jaw are opened and closed along with the expansion or furl of the pair of supporting pieces 1.

As an alternative embodiment, referring to fig. 3, there is shown an exploded view of the structure of the feed screw-nut mechanism 3. As shown in the figure, the guiding device 33 is a rectangular frame, and a supporting hole 330 is formed at the center of each of the two short sides; the shaft of the screw rod 31 is bounded by the approximate midpoint, the screw teeth 311 are uniformly distributed on one side surface, the other side surface is smooth, and the two tail ends of the screw rod 31 are respectively provided with a supporting column 312 which is coaxial with the screw rod 31 and is used for being inserted into the supporting hole 330.

Referring to fig. 4, a schematic structural view of the movable connection between the opening and closing mechanism 4 and the nut 32 is shown. As can be seen from the figure, the opening and closing mechanism 4 includes four supporting bars 41, two side bars 42 and a supporting point 34, the inside of which is penetrated by a through hole 303 for sleeving the smooth part of the screw rod 31, the four supporting bars 41 and the two side bars 42 are movably connected with each other to form a hexagon, wherein the two side bars 42 are respectively used as the top edge and the bottom edge of the hexagon to fix the supporting member 1, the supporting point 34 is movably connected with the ends of the two supporting bars 41 on the right side of the hexagon, the ends of the two supporting bars 41 on the left side of the hexagon are movably connected with the nut 32, and a buffer spring 45 penetrated by the smooth part of the screw rod 31 is arranged between the supporting point 34 and the right short side of the guiding device 33.

As shown in fig. 3, the smooth portion of the screw rod 31 is provided with a snap spring groove 314 for placing a snap spring. As shown in fig. 4, the node 34 is restrained from moving toward the nut by placing a circlip in the circlip groove 314 (the circlip is not shown in the figure to better illustrate the specific location of the circlip groove 314).

As an alternative embodiment, please refer to fig. 5, which shows an exploded view of the structure of the opening and closing mechanism 4. As can be seen, the four support bars 41 are formed by connecting the long sides of the two side surfaces 411 with the two long sides of a straight surface 412 respectively, and the two edge bars 42 are formed by connecting the long sides of the two side plates 421 with the two long sides of a straight plate 422 respectively; the straight surface 412 of the support bar 41 at the upper part of the hexagon is narrower than the straight surface 412 of the support bar 41 at the lower part of the hexagon, the support bar 41 at the upper part of the hexagon is used as a narrow support bar, the support bar 41 at the lower part of the hexagon is used as a wide support bar, the edge bar 42 at the top edge of the hexagon is used as a top edge bar, and the edge bar 42 at the bottom edge of the hexagon is used as a bottom edge bar; the straight piece 422 of the top edge strip is narrower than the straight piece 422 of the bottom edge strip; bolt holes 43 for screws 6 to pass through are formed in the side 411, close to the bottom end, of the narrow supporting strip and the side 411, close to the top end, of the wide supporting strip, and bolt holes 44 for the bolt rods 5 to pass through are formed in the side 411, close to the top end, of the narrow supporting strip, the side 411, close to the bottom end, of the wide supporting strip and the side plates 421, close to the two tail ends, of the two side strips 42.

Referring to fig. 6, a schematic diagram of the nut 32 and the fulcrum 34 is shown. As can be seen, the nut 32 and the fulcrum 34 each include a cylinder 301 having a through hole 303 passing through the inside thereof, two internally threaded cylinders 302 respectively disposed on the sidewalls near to both sides of a distal end of the cylinder 301, and the axes of the two internally threaded cylinders 302 are perpendicular to the axis of the cylinder 301; the inner side wall of the through hole 303 of the nut 32 is provided with an internal thread corresponding to the thread 311 of the screw rod 31, the inner side wall of the cylinder 301 of the fulcrum 34 is smooth, and the tail end of the cylinder 301 facing to one side of the short side of the guide device 33 is provided with a supporting part 340 for abutting against the buffer spring 45.

Referring to fig. 4 to 6, the bottom end of the narrow branch is inserted between the two side surfaces 411 of the wide branch, the fulcrum 34 and the nut 32 are both inserted between the two side surfaces 411 of the narrow branch, and the screw 6 passes through the bolt hole 43 and is screwed on the nut 32 and the internal thread barrel 302 of the fulcrum 34; the top end of the narrow supporting bar is embedded between the two side pieces 421 of the top edge bar, and the two bolt rods 5 respectively penetrate through the bolt holes 44; the bottom end of the wide supporting bar is inserted between the two side pieces 421 of the bottom bar, and the two latch rods 5 similarly penetrate through the latch holes 44 respectively.

As an alternative embodiment, please refer to fig. 7, which shows an exploded view of a part of the structure of the supporting member 1 and the edge strip 42. As can be seen from the figure, the supporting member 1 is formed by connecting the long sides of the two side plates 11 with the two long sides of a straight plate 12 respectively, the left end is provided with an engagement part 13 for the supporting member 1, the engagement part 13 is an obtuse angle bending sheet, one side of the engagement part is connected with the left end of the straight plate 12, and the other side of the engagement part is parallel to the straight plate 12; two side plates 11 of the supporting piece 1 are provided with a rotating shaft hole 14 at the upper right corner and two side faces 411 of the edge strip 42 are provided with an upper right corner, the two edge strips 42 are embedded between the two side plates of the supporting piece 1, and the shaft rod 2 penetrates through the rotating shaft hole 14 to enable the supporting piece 1 to rotate relative to the edge strips 42.

Referring to fig. 8 and 9, a schematic structural diagram of the combination of the feed screw-nut mechanism 3 and the opening-closing mechanism 4 when the two support members 1 are in the closed state, and a schematic structural diagram of the combination of the feed screw-nut mechanism 3 and the opening-closing mechanism 4 when the two support members 1 are in the expanded state are sequentially shown. When the screw rod 31 is rotated reversely, the nut 32 translates leftwards along the guide device 33 to pull the two edge strips 42 connected with the nut to be folded, and under the support of the buffer spring 45 to the fulcrum 34, the two edge strips 42 respectively positioned at the top and the lower sides are folded by utilizing the instability of the hexagon, so that the two supporting pieces 1 are folded, and similarly, when the screw rod 31 is rotated forwardly, the two supporting pieces 1 are expanded.

Referring to fig. 10, as an alternative embodiment, there is shown an external view of the cabinet 7 housing the automatic control system 9. As can be seen from the figure, the housing 7 includes an upper cover 71 and a lower cover 72, the lcd 95 is embedded in the upper cover 71, the button 73 is embedded in the surface of the upper cover 71, and a DC power supply hole 74 for supplying power to the automatic control system 9 is disposed at a side 411 of the lower cover 72.

Referring to fig. 11, which shows a schematic structural diagram of the inside of the housing 7, referring to fig. 10, it can be seen that the power assembly 8 and the printed circuit board 91 carrying the automatic control system 9 are both installed in the lower cover 72, and the power assembly 8 specifically includes a digital motor 81, a speed change gear box 82 connected to the digital motor 81, and a transmission member 83 having a terminal connected to the speed change gear box 82 and extending out of the housing 7. The other end of the transmission member 83 is provided with a square joint 831, as shown in fig. 3, a square groove 313 corresponding to the square joint 831 is formed in the center of the end surface of the support column 312 on the side of the smooth portion of the screw rod 31, and the square groove 313 and the square joint 831 are in interference fit.

Referring to fig. 12, a circuit configuration diagram of the automatic control system 9 is shown. As can be seen from the figure, the automatic control system 9 specifically includes:

a sensor module 92 including a distance sensor 922 for detecting an expansion stroke width of the pair of support members 1 and a pressure sensor 921 for detecting an occlusal force applied by the patient;

a preset value input module 93 for inputting the upper and lower limit values of the allowable expansion stroke width and the upper and lower limit values of the allowable applied occlusal force;

the micro-control unit 94 is used for receiving the expansion stroke width and the occlusion force detected by the sensor module 92 and controlling the power assembly 8 to rotate forwards or backwards according to whether the stroke width and the occlusion force reach an upper limit value or a lower limit value;

and a liquid crystal display 95 for displaying the stroke width measured by the distance sensor 922, the current pressure of the pressure sensor 921, the upper and lower limit values of the allowable expansion stroke width, and the upper and lower limit values of the allowable application biting force.

As an alternative embodiment, please refer to fig. 13, which shows a schematic diagram of a specific installation position of the pressure sensor 921. As can be seen from the figure, the left end of the supporting member 1 is the engagement portion 13, the right end thereof is rotatably connected to the right edge of the edge strip 42 via the shaft 2, the pressure sensor 921 is disposed between the supporting member 1 and the edge strip 42, and the supporting member 1 is pressed against the edge strip 42 to press the pressure sensor 921 in a use state.

As an alternative embodiment, please refer to fig. 14, which shows a schematic structural view of the inner side of the straight piece 422 of the edge strip 42. Referring to fig. 8, it can be seen that the distance sensor 922 includes a pair of hollow tubular columns 923 disposed on opposite sides of the two edge strips 42, the pair of tubular columns 923 on one edge strip 42 correspond to the pair of tubular columns 923 on the other edge strip 42, a pressure membrane resistor 924 attached to the inner bottom wall of the tubular columns 923, and a pair of test springs 925 having ends respectively embedded in the two tubular columns 923 on the two edge strips 42, the test springs 925 tightly support the pressure membrane resistor 924.

Referring to fig. 15 together with an alternative embodiment, an internal structure of the transmission member 83 is schematically shown. As can be seen, the transmission member 83 includes a flexible steel cable 832, a protection spring 833 penetrated by the flexible steel cable 832, an inner hollow hose 834 wrapping the spring, and a square joint 831 disposed at one end of the flexible steel cable 832, and the other end of the flexible steel cable 832 is connected to the transmission gear box 82.

As an alternative embodiment, referring to FIG. 16, an overall schematic view of the transmission member 83 is shown. The micro control unit 94 and the sensor module 92 adopt wired communication, part of signal lines for communicating the micro control unit 94 and the sensor module 92 are wound on the outer surface of the inner hollow hose 834, the transmission member 83 further comprises an outer hollow hose 835 for wrapping the signal lines, and two data line plugs 836 which are respectively fixed at two ends of the outer hollow hose 835 and are used for being connected with the signal lines; a pin of a data line plug 836 penetrates the short side of the guide device 33 and is connected with the pressure sensor 921 and the pressure film resistor 924 through signal lines; the other data plug extends through the housing 7 and is connected to the micro-control unit 94 by a signal line, which is not shown in the figure, since it is surrounded by an outer hose.

The speed change gear box 82 outputs steering power to the flexible steel wire rope 832, the lead screw 31 is driven to rotate through the flexible steel wire rope 832, so that even if the automatic control system 9 is placed on a table top when a patient uses the masticatory muscle training instrument, the head can move freely without pushing the automatic control system 9 on the table top, and in addition, the flexible steel wire rope 832 is wrapped by the protection spring 833, the rotation of the flexible steel wire rope 832 in the transmission piece 83 cannot be influenced even if the transmission piece 83 is bent.

The manufacturing cost of the masticatory muscle training instrument can be reduced by adopting wired communication, the signal wire can be effectively protected by wrapping the signal wire between the inner hollow hose 834 and the outer hollow hose 835, and meanwhile, the signal wire cannot be damaged by the rotation of the flexible steel wire rope 832.

As an alternative embodiment, referring to fig. 3 to 4, 11, and 15 to 16, the masticatory muscle training apparatus further includes two nuts 10, which are penetrated by the transmission member 83 and respectively cover the two data plugs, and the outer threaded pipes 20 corresponding to the nuts 10 are respectively disposed at the positions where the pins of the data plugs penetrate the short sides of the guiding device 33 and the pins of the data plugs penetrate the case 7.

The invention is not only suitable for the mouth opening limitation of patients with nasopharyngeal carcinoma after chronic radioactive fibrosis of masticatory muscles caused by radiotherapy, but also suitable for the occlusal force training of patients with hemilateral amyotrophy after stroke, brain operation and the like, and is also suitable for the elderly normal people for preventing the decrease of the amyotrophy of the masseter to improve the life quality.

The present invention has been described in detail, and the principle and the embodiments of the present invention are explained in detail by using specific examples, and the descriptions of the above examples are only used to help understand the method of the present application and the core idea thereof, and the content of the present specification should not be construed as limiting the present invention.