Oral cavity opening device for laryngeal examination

Abstract

The invention relates to the technical field of oral cavity distraction, in particular to an oral cavity distraction device for laryngeal examination, which comprises two lower pressing plates, the tongue depressor is arranged between the two lower pressing plates, and a cavity is formed in the tongue depressor; the two upper pressing plates are respectively arranged on the two lower pressing plates; the telescopic structure is arranged between the two lower pressing plates and used for adjusting the distance between the two lower pressing plates; and the connecting frame is fixedly arranged on the top surface of the tongue depressor. Compared with the prior art, by arranging the pull rod and the illumination structure, the illumination structure is provided with the illumination lamp, and the angle of the illumination lamp can be flexibly adjusted through the transmission mechanism and the sliding groove, the design enables a doctor to adjust the illumination angle according to needs, so that the laryngeal condition of a patient is more clearly observed, and meanwhile, the operation is convenient. Due to efficient illumination, the accuracy and efficiency of examination are improved, the visual burden of doctors is relieved, and the overall examination quality can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of oral cavity opening, and in particular to an oral cavity opening device for laryngeal examination. Background Art

[0002] Laryngeal examination aims to evaluate the structure and function of the larynx and whether there are abnormal lesions, such as inflammation, tumors, vocal cord problems, etc. Through the examination, the doctor can formulate an appropriate treatment plan to ensure the health of the patient's larynx. The methods of laryngeal examination include direct observation, indirect laryngoscopy, fiberoptic laryngoscopy, electronic laryngoscopy, and imaging examination.

[0003] After searching, the Chinese patent with publication number CN215078252U discloses a psychiatric throat examination device, including a mounting tube, tooth pads are arranged at both ends of the mounting tube, a tongue depressor is hinged in the middle of the mounting tube, a through slot is provided on the tongue depressor, an extension plate is inserted in the through slot of the tongue depressor, and the extension plate can move forward and backward in the through slot; in summary, the utility model uses two tooth pads to support the patient's teeth, and then open the patient's mouth, without the need for medical staff to continuously use force to assist in opening the patient's mouth, and the overall height of the tooth pad can be adjusted, which is convenient for changing the degree of oral opening; the extension plate can extend the tongue depressor, which is convenient for pressing the patient's tongue to observe the deeper throat; the overall structural design of the utility model is reasonable and the adjustability is strong, which provides convenience for psychiatric medical staff to examine the patient's throat, but the scheme still has the following shortcomings when it is actually used:

[0004] When performing a detailed examination of the larynx, although a special opening device can be used to effectively open the patient's mouth to expose the area that needs to be examined, since the larynx is located deep in the back of the mouth, it is often difficult for natural light to directly illuminate these areas. Therefore, doctors usually need to use flashlights or other forms of external light sources for lighting to ensure that every detail of the larynx can be clearly observed. However, this handheld lighting method has obvious limitations. For example, the lighting angle is not easy to control stably, and the light may deviate from the target area due to slight movements of the doctor's hands, thus affecting the accuracy and efficiency of the examination.

[0005] Therefore, the present application provides an oral opening device for laryngeal examination. Summary of the invention

[0006] In view of this, an object of the present invention is to provide an oral opening device for laryngeal examination to solve the problem that manual lighting is difficult to adjust the angle and affects observation.

[0007] Based on the above purpose, the present invention provides an oral opening device for laryngeal examination, comprising:

[0008] Two lower pressure plates;

[0009] A tongue depressor is arranged between the two lower pressing plates, and a cavity is arranged inside the tongue depressor;

[0010] Two upper pressing plates, respectively arranged on the two lower pressing plates;

[0011] A telescopic structure, disposed between the two lower pressing plates, for adjusting the distance between the two lower pressing plates;

[0012] A connecting frame, fixedly mounted on the top surface of the tongue depressor, and the top end of the connecting frame is connected to the telescopic structure;

[0013] Two groups of adjustment structures are respectively arranged between the two lower pressing plates and the two upper pressing plates, and are used to adjust the angle between the lower pressing plates and the upper pressing plates;

[0014] A pull rod is provided through one end of the tongue depressor, and the pull rod is movably connected to the through-hole;

[0015] An illumination structure, disposed on the tongue depressor, for illuminating the throat at multiple angles;

[0016] A protective hemispherical cover is rotatably mounted on the top surface of the tongue depressor at the position of the lighting structure;

[0017] The flip structure is arranged on the inner side of the tongue depressor and is used to drive the protective hemispherical cover.

[0018] Preferably, the telescopic structure comprises:

[0019] A fixed sleeve, fixedly mounted on a side of the lower pressing plate;

[0020] An adjusting screw is arranged on the inner side of the fixing sleeve, and one end of the adjusting screw located on the outer side of the fixing sleeve is fixedly connected to the side surface of the other lower pressing plate;

[0021] Two guide grooves are symmetrically arranged on the inner wall of the fixed sleeve;

[0022] Two guide blocks are symmetrically fixedly mounted on one end of the adjusting screw located inside the fixed sleeve, and the guide blocks are slidably connected to the guide grooves;

[0023] A threaded sleeve is rotatably mounted on the end of the fixed sleeve, and the threaded sleeve is threadedly connected to the adjusting screw.

[0024] Preferably, the outer wall of the fixing sleeve is fixedly connected to the top end of the connecting frame.

[0025] Preferably, the regulating structure comprises:

[0026] A bracket, fixedly mounted on the top surface of the lower pressing plate;

[0027] a drive screw rotatably mounted between opposite sides of the bracket, with an end of the drive screw passing through the bracket;

[0028] An adjusting block, threadedly mounted on the driving screw;

[0029] A support plate is hinged on the top surface of the adjusting block, and one end of the support plate away from the adjusting block is hinged to the bottom surface of the upper pressing plate.

[0030] Preferably, a knob is fixedly mounted on one end of the driving screw located outside the bracket, and the bottom surface of the adjustment block is in contact with the top surface of the lower pressure plate.

[0031] Preferably, the lighting structure comprises:

[0032] A serpentine mouth is provided at one end of the top surface of the tongue depressor;

[0033] A slider, slidably mounted on the inner wall of the serpentine mouth;

[0034] A lighting lamp, fixedly mounted on the top surface of the sliding block;

[0035] A connecting plate, rotatably mounted on the bottom surface of the sliding block;

[0036] A transmission rod, fixedly mounted between the connecting plate and the end of the pull rod;

[0037] A guide sleeve is fixedly mounted on the inner wall of the cavity, and the pull rod is located on the inner side of the guide sleeve;

[0038] The limiting mechanism is arranged on the guide sleeve and the pull rod.

[0039] Preferably, the limiting mechanism comprises:

[0040] A slide groove is provided on the inner wall of the guide sleeve;

[0041] A limit block, fixedly mounted on the outer wall of the pull rod;

[0042] The limiting groove is arranged on the inner wall of the guide sleeve, the end of the limiting groove is communicated with the sliding groove, and the limiting block is slidably connected with the sliding groove and the limiting groove.

[0043] Preferably, the transmission rod is made of elastic plastic material.

[0044] Preferably, the flip structure comprises:

[0045] An arc-shaped opening is provided on the top surface of the tongue depressor;

[0046] A clearance opening is provided on the top surface of the tongue depressor at one end of the arc-shaped opening;

[0047] A flip gear is fixedly mounted on the inner wall of the protective hemispherical cover;

[0048] A through opening, which is provided on the inner wall of the yield opening;

[0049] A driving rack is slidably mounted on the inner wall of the yielding opening, and the driving rack is meshed with the flipping gear;

[0050] A pull rod is slidably mounted on the inner wall of the through opening, one end of the pull rod is fixedly connected to the driving rack, and the other end of the pull rod extends to the outside of the through opening.

[0051] Preferably, the protective hemispherical cover is located outside the serpentine mouth and the lighting lamp.

[0052] Beneficial effects of the present invention:

[0053] 1. This oral opening device for throat examination, by setting up a telescopic structure and an adjustment structure, allows the doctor to flexibly adjust the distance between the two lower pressure plates and the relative position between the lower pressure plate and the upper pressure plate according to the specific conditions of the patient's oral teeth. This design allows the lighting structure to adapt to the oral morphology of different patients, ensuring that the oral cavity is stably and comfortably opened, providing the doctor with a better operating field of view and inspection space. At the same time, the angle of the upper pressure plate can also be adjusted, further enhancing the adaptability and flexibility of the structure and meeting the doctor's needs for different angles during the examination.

[0054] 2. This oral opening device for laryngeal examination is provided with a pull rod and a lighting structure. The lighting structure is equipped with a lighting lamp, and the angle of the lighting lamp can be flexibly adjusted through a transmission mechanism and a slide groove. This design enables the doctor to adjust the lighting angle as needed, so as to observe the patient's laryngeal condition more clearly. At the same time, efficient lighting not only improves the accuracy and efficiency of the examination, but also reduces the doctor's visual burden, which helps to improve the overall examination quality.

[0055] 3. This oral opening device for throat examination is provided with a protective hemispherical cover and a flip structure. The design of the protective hemispherical cover can not only provide additional protection for the lighting lamp during use to prevent it from being damaged, but also avoid the accumulation of dust and dirt when it is stored. In addition, through the driving mechanism of the pull rod and the flip gear, the doctor can easily open and close the protective hemispherical cover. The operation is simple, safe and reliable, which effectively extends the service life of the lighting equipment and reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0058] Figure 2 It is a schematic diagram of the partial cutaway structure of the fixing sleeve of the present invention;

[0059] Figure 3 It is a schematic diagram of the structure of the lower pressing plate and the upper pressing plate of the present invention;

[0060] Figure 4 This is a schematic diagram of the structure of the tongue depressor of the present invention;

[0061] Figure 5 This is a schematic diagram of the internal structure of the tongue depressor of the present invention;

[0062] Figure 6 for Figure 5 The enlarged structural diagram at A in the middle;

[0063] Figure 7 It is a schematic diagram of the partial cross-section structure of the pull rod and the guide sleeve of the present invention;

[0064] Figure 8 The schematic diagram of the end structure of the tongue depressor of the present invention is

[0065] Fig. 9 for Figure 8 Enlarged structural diagram at B in the middle.

[0066] The markings in the figure are:

[0067] 1. Lower pressure plate; 2. Tongue depressor; 3. Upper pressure plate; 41. Fixed sleeve; 42. Adjusting screw; 43. Guide groove; 44. Guide block; 45. Threaded sleeve; 5. Connecting frame; 61. Bracket; 62. Drive screw; 63. Adjusting block; 64. Support plate; 65. Knob; 7. Pull rod; 81. Serpentine mouth; 82. Slider; 83. Connecting plate; 84. Transmission rod; 85. Guide sleeve; 86. Slide groove; 87. Limit block; 88. Limit groove; 89. Illuminating lamp; 9. Protective hemispherical cover; 101. Arc mouth; 102. Give way mouth; 103. Flip gear; 104. Through mouth; 105. Drive rack; 106. Pull rod. DETAILED DESCRIPTION

[0068] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0069] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0070] like Figures 1 to 9 As shown, an oral opening device for throat inspection includes two lower pressing plates 1; a tongue depressor 2, which is arranged between the two lower pressing plates 1, and a cavity is arranged inside the tongue depressor 2; two upper pressing plates 3, which are respectively arranged on the two lower pressing plates 1; a telescopic structure, which is arranged between the two lower pressing plates 1, and is used to adjust the distance between the two lower pressing plates 1; a connecting frame 5, which is fixedly installed on the top surface of the tongue depressor 2, and the top of the connecting frame 5 is connected to the telescopic structure; two groups of adjustment structures, which are respectively arranged between the two lower pressing plates 1 and the two upper pressing plates 3, and are used to adjust the angle between the lower pressing plates 1 and the upper pressing plates 3; a pull rod 7, which is arranged through one end of the tongue depressor 2, and the pull rod 7 is movably connected to the penetration point; an illumination structure, which is arranged on the tongue depressor 2, and is used to illuminate the throat at multiple angles; a protective hemispherical cover 9, which is rotatably installed on the top surface of the tongue depressor 2 and is located at the position of the illumination structure; a flip structure, which is arranged on the inner side of the tongue depressor 2, and is used to drive the protective hemispherical cover 9;

[0071] When in use, in the initial state, the protective hemispherical cover 9 is located outside the entire lighting structure. The distance between the two lower pressing plates 1 can be adjusted by the telescopic structure according to the condition of the patient's oral teeth. Then the lower pressing plate 1 and the upper pressing plate 3 can be directly placed in the patient's mouth, so that the lower pressing plate 1 fits with the lower teeth on both sides. The doctor then adjusts the distance between the lower pressing plates 1 and the upper pressing plates 3 on both sides by adjusting the structure, and can push the patient's mouth open by the upper pressing plate 3, so that the patient's mouth is in an open state. The doctor can open the protective hemispherical cover 9 by flipping the structure, and illuminate the patient's throat through the lighting structure for observation. After the examination is completed, the protective hemispherical cover 9 is reset, and the lower pressing plate 1 and the upper pressing plate 3 are taken out of the patient's mouth.

[0072] like Figure 1 , Figure 2As shown, the telescopic structure includes: a fixed sleeve 41, which is fixedly mounted on the side of a lower pressing plate 1, and the outer wall of the fixed sleeve 41 is fixedly connected to the top of the connecting frame 5; an adjusting screw 42 is arranged on the inner side of the fixed sleeve 41, and one end of the adjusting screw 42 located on the outer side of the fixed sleeve 41 is fixedly connected to the side of the other lower pressing plate 1; two guide grooves 43 are symmetrically arranged on the inner wall of the fixed sleeve 41; two guide blocks 44 are symmetrically fixedly mounted on one end of the adjusting screw 42 located on the inner side of the fixed sleeve 41, and the guide blocks 44 are slidably connected to the guide grooves 43; a threaded sleeve 45 is rotatably mounted on the end of the fixed sleeve 41, and the threaded sleeve 45 is threadedly connected to the adjusting screw 42;

[0073] When adjusting the spacing between the two lower pressure plates 1, the threaded sleeve 45 can be rotated. Since the threaded sleeve 45 is threadedly connected to the adjusting screw 42, and the adjusting screw 42 is slidingly connected to the fixed sleeve 41 through the guide groove 43 and the guide block 44, the threaded sleeve 45 can drive the adjusting screw 42 to slide along the fixed sleeve 41 when it rotates, thereby adjusting the overall length of the fixed sleeve 41 and the adjusting screw 42, thereby realizing the adjustment of the spacing between the two lower pressure plates 1.

[0074] like Figure 3 As shown, the adjustment structure includes: a bracket 61, fixedly mounted on the top surface of the lower pressing plate 1; a driving screw 62, rotatably mounted between the opposite sides of the bracket 61, and the end of the driving screw 62 passes through the bracket 61, and a knob 65 is fixedly mounted on one end of the driving screw 62 located outside the bracket 61; an adjustment block 63, threadedly mounted on the driving screw 62, and the bottom surface of the adjustment block 63 is in contact with the top surface of the lower pressing plate 1; a support plate 64, hinged on the top surface of the adjustment block 63, and one end of the support plate 64 away from the adjustment block 63 is hinged to the bottom surface of the upper pressing plate 3;

[0075] When adjusting the angle of the upper pressure plate 3, the doctor can rotate the knob 65 to drive the driving screw 62 to rotate. Since the adjustment block 63 is screwed to the driving screw 62, and the bottom surface of the adjustment block 63 is in contact with the top surface of the tongue depressor 2, the rotation of the driving screw 62 can drive the adjustment block 63 to slide, thereby driving the support plate 64 to rotate and lift the upper pressure plate 3, thereby realizing the adjustment of the angle of the upper pressure plate 3.

[0076] like Figures 4 to 7As shown, the lighting structure includes: a serpentine mouth 81, which is opened at one end of the top surface of the tongue depressor 2; a slider 82, which is slidably mounted on the inner wall of the serpentine mouth 81; an illuminating lamp 89, which is fixedly mounted on the top surface of the slider 82, and a protective hemispherical cover 9 is located outside the serpentine mouth 81 and the illuminating lamp 89; a connecting plate 83, which is rotatably mounted on the bottom surface of the slider 82; a transmission rod 84, which is fixedly mounted between the connecting plate 83 and the end of the pull rod 7, and the transmission rod 84 is made of elastic plastic material; a guide sleeve 85, which is fixedly mounted on the inner wall of the cavity, and the pull rod 7 is located on the inner side of the guide sleeve 85; a limiting mechanism, which is arranged on the guide sleeve 85 and the pull rod 7;

[0077] like Figure 7 As shown, the limiting mechanism includes: a slide groove 86, which is provided on the inner wall of the guide sleeve 85; a limiting block 87, which is fixedly mounted on the outer wall of the pull rod 7; a limiting groove 88, which is provided on the inner wall of the guide sleeve 85, the end of the limiting groove 88 is connected to the slide groove 86, and the limiting block 87 is slidably connected with the slide groove 86 and the limiting groove 88;

[0078] After propping up the patient's mouth and letting out the lighting lamp 89, the staff can rotate the pull rod 7 so that the limit block 87 on the outer wall of the pull rod 7 slides along the limit groove 88 into the slide groove 86, and then the pull rod 7 can be pulled. When the pull rod 7 is pulled, the connecting plate 83 and the slider 82 can be driven to slide along the serpentine mouth 81 through the transmission rod 84. When the slider 82 slides in the serpentine mouth 81 and is in different positions, it can be at different angles, thereby realizing the adjustment of the angle of the lighting lamp 89, so that the doctor can perform multi-angle examinations on the patient's throat.

[0079] like Figure 8 , Fig. 9 As shown, the flip structure includes: an arc-shaped opening 101, which is opened on the top surface of the tongue depressor 2; a clearance opening 102, which is opened on the top surface of the tongue depressor 2 and is located at one end of the arc-shaped opening 101; a flip gear 103, which is fixedly installed on the inner wall of the protective hemispherical cover 9; a through opening 104, which is opened on the inner wall of the clearance opening 102; a driving rack 105, which is slidably installed on the inner wall of the clearance opening 102, and the driving rack 105 is meshed with the flip gear 103; a pull rod 106, which is slidably installed on the inner wall of the through opening 104, one end of the pull rod 106 is fixedly connected to the driving rack 105, and the other end of the pull rod 106 extends to the outside of the through opening 104;

[0080] When the protective hemispherical cover 9 is driven, the pull bar 106 can be pulled to drive the driving rack 105 to slide, and the driving rack 105 can engage with the flip gear 103, thereby driving the flip gear 103 to rotate, so that the protective hemispherical cover 9 rotates and enters the cavity in the tongue depressor 2 through the arc-shaped opening 101, so as to achieve the storage of the protective hemispherical cover 9. After use, the protective hemispherical cover 9 can be reset by pushing the pull bar 106 back to protect the lighting lamp 89, so as to avoid damage when it is not in use.

[0081] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0082] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oral opening device for laryngeal examination, characterized in that: include: Two lower pressing plates (1); A tongue depressor (2) is arranged between the two lower pressing plates (1), and a cavity is arranged inside the tongue depressor (2); Two upper pressing plates (3) are respectively arranged on the two lower pressing plates (1); A telescopic structure, arranged between the two lower pressing plates (1) and used for adjusting the distance between the two lower pressing plates (1); A connecting frame (5) is fixedly mounted on the top surface of the tongue depressor (2), and the top end of the connecting frame (5) is connected to the telescopic structure; Two groups of adjustment structures are respectively arranged between the two lower pressing plates (1) and the two upper pressing plates (3), and are used to adjust the angle between the lower pressing plates (1) and the upper pressing plates (3); A pull rod (7) is arranged through one end of the tongue depressor (2), and the pull rod (7) is movably connected to the penetration point; An illumination structure, arranged on the tongue depressor (2) and used for illuminating the throat at multiple angles; A protective hemispherical cover (9) is rotatably mounted on the top surface of the tongue depressor (2) at the position of the lighting structure; The flip structure is arranged on the inner side of the tongue depressor (2) and is used to drive the protective hemispherical cover (9).

2. The oral cavity opening device for laryngeal examination according to claim 1, characterized in that: The telescopic structure comprises: A fixed sleeve (41) fixedly mounted on a side surface of the lower pressing plate (1); An adjusting screw (42) is arranged on the inner side of the fixing sleeve (41), and one end of the adjusting screw (42) located on the outer side of the fixing sleeve (41) is fixedly connected to the side surface of the other lower pressing plate (1); Two guide grooves (43) are symmetrically arranged on the inner wall of the fixing sleeve (41); Two guide blocks (44) are symmetrically fixedly mounted on one end of the adjusting screw (42) located inside the fixed sleeve (41), and the guide blocks (44) are slidably connected to the guide groove (43); A threaded sleeve (45) is rotatably mounted on the end of the fixed sleeve (41), and the threaded sleeve (45) is threadedly connected to the adjusting screw (42).

3. The oral cavity opening device for laryngeal examination according to claim 2, characterized in that: The outer wall of the fixed sleeve (41) is fixedly connected to the top end of the connecting frame (5).

4. The oral cavity opening device for laryngeal examination according to claim 1, characterized in that: The regulatory structure comprises: A bracket (61) is fixedly mounted on the top surface of the lower pressing plate (1); A driving screw rod (62) is rotatably mounted between opposite sides of the bracket (61), and an end of the driving screw rod (62) passes through the bracket (61); An adjusting block (63) threadably mounted on the driving screw (62); The support plate (64) is hinged on the top surface of the adjusting block (63), and one end of the support plate (64) away from the adjusting block (63) is hinged to the bottom surface of the upper pressing plate (3).

5. The oral cavity opening device for laryngeal examination according to claim 4, characterized in that: A knob (65) is fixedly mounted on one end of the driving screw rod (62) located outside the bracket (61), and the bottom surface of the adjustment block (63) is in contact with the top surface of the lower pressing plate (1).

6. The oral cavity opening device for laryngeal examination according to claim 1, characterized in that: The lighting structure comprises: A serpentine opening (81) is provided at one end of the top surface of the tongue depressor (2); A slider (82) is slidably mounted on the inner wall of the serpentine opening (81); An illumination lamp (89) is fixedly mounted on the top surface of the sliding block (82); A connecting plate (83) rotatably mounted on the bottom surface of the sliding block (82); A transmission rod (84) is fixedly mounted between the connecting plate (83) and the end of the pull rod (7); A guide sleeve (85) is fixedly mounted on the inner wall of the cavity, and the pull rod (7) is located on the inner side of the guide sleeve (85); The limiting mechanism is arranged on the guide sleeve (85) and the pull rod (7).

7. The oral cavity opening device for laryngeal examination according to claim 6, characterized in that: The limiting mechanism comprises: A slide groove (86) is provided on the inner wall of the guide sleeve (85); A limit block (87) is fixedly mounted on the outer wall of the pull rod (7); A limiting groove (88) is provided on the inner wall of the guide sleeve (85), an end of the limiting groove (88) is communicated with the slide groove (86), and the limiting block (87) is slidably connected with the slide groove (86) and the limiting groove (88).

8. The oral cavity opening device for laryngeal examination according to claim 7, characterized in that: The transmission rod (84) is made of elastic plastic material.

9. The oral cavity opening device for laryngeal examination according to claim 6, characterized in that: The flip structure comprises: An arc-shaped opening (101) is provided on the top surface of the tongue depressor (2); A clearance opening (102) is provided on the top surface of the tongue depressor (2) at one end of the arc-shaped opening (101); A flip gear (103) is fixedly mounted on the inner wall of the protective hemispherical cover (9); A through opening (104) is provided on the inner wall of the clearance opening (102); A driving rack (105) is slidably mounted on the inner wall of the clearance opening (102), and the driving rack (105) is meshed with the flip gear (103); A pull rod (106) is slidably mounted on the inner wall of the through opening (104), one end of the pull rod (106) is fixedly connected to the driving rack (105), and the other end of the pull rod (106) extends to the outside of the through opening (104).

10. The oral cavity opening device for laryngeal examination according to claim 9, characterized in that: The protective hemispherical cover (9) is located outside the serpentine opening (81) and the illuminating lamp (89).

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