Mouth opening auxiliary device for laryngoscopy

Abstract

The invention relates to the technical field of laryngoscopy assistance, in particular to a mouth opening assisting device for laryngoscopy. According to the mouth opening auxiliary device for laryngoscopy, the supporting width can be adjusted so that the mouth opening auxiliary device can be matched with mouths of different sizes, and the adaptability is improved. A mouth opening auxiliary device for laryngoscopy comprises a supporting frame and an arc-shaped block fixedly connected to the inner bottom of the supporting frame, and a clamping assembly is arranged on the supporting frame. The biteplate is moved into the oral cavity of a patient and corresponds to teeth, then the pull rod is pulled to drive the extension plate to move outwards to a position suitable for the patient to use through the connecting rod, then the driving rod is twisted to rotate, so that the biteplate and the extension plate move outwards to be in contact with the teeth of the patient, and the teeth of the patient are supported and assisted; then the lens of the laryngoscope extends into the throat of a patient for examination, in this way, the supporting width is adjusted according to requirements so that the laryngoscope can be matched with mouths of different sizes, and therefore the adaptability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of laryngoscope examination assistance, and in particular to a mouth opening assistance device for laryngoscope examination. Background Art

[0002] In the hospital, some patients need to check the condition of their throat, so they need to use a laryngoscope. When using a laryngoscope, the patient's mouth needs to be supported and limited to prevent the patient from closing his mouth and biting the laryngoscope, which would affect the movement of the laryngoscope.

[0003] A Chinese patent with publication number CN213787291U discloses an auxiliary mouth opening device for electronic laryngoscope examination, including an upper bite plate and a lower bite plate. The side of the upper bite plate is fixedly connected to an upper support plate, a pull rod is inserted into the upper surface of the upper support plate, a first tension spring is sleeved on the outside of the pull rod, and an upper arc plate is fixedly connected to the lower surface of the upper support plate. Although the above patent can support the patient's mouth, the width of the bite plate cannot be adjusted and the size of people's mouths is different, which makes it difficult to support mouths of different sizes and has low adaptability.

[0004] The present invention aims to solve the problems existing in the above patents. To this end, a mouth opening auxiliary device for laryngoscopy is proposed, which can adjust the support width to adapt to mouths of different sizes and improve the adaptability. Summary of the invention

[0005] In order to overcome the shortcomings of the above patent that although the width of the bite plate can support the patient's mouth, it is difficult to support mouths of different sizes because the width of the bite plate cannot be adjusted and the sizes of people's mouths are different, resulting in low adaptability, the present invention provides a mouth opening auxiliary device for laryngoscopy that can adjust the support width to adapt to mouths of different sizes and improve adaptability.

[0006] The present invention is achieved through the following technical approaches: A mouth opening auxiliary device for laryngoscopy examination comprises a support frame and an arc-shaped block fixed to the bottom inner side of the support frame, a clamping assembly is arranged on the support frame, a movable plate is slidably connected to the top and bottom of the support frame, a bite plate is fixed to the outer side of the movable plate, and also comprises a sleeve, an extension plate, a connecting rod, a pull rod, a driving assembly and a load-bearing assembly for limiting the support frame, the sleeve is symmetrically fixed to the inner side of the bite plate, the inner side of the sleeve is slidably connected to the extension plate, the corresponding outer side of the inner side of the extension plate is rotatably connected to the connecting rod, and the inner ends of the connecting rods on the same side are rotatably connected, the driving assembly is used to control the bite plate to move outward to open the patient's mouth, and at the same time, the pull rod is controlled to move to drive the connecting rod to move, and the connecting rod movement controls the extension plate to move, so that the extension plate increases the width of the bite plate to support mouths of different sizes.

[0007] Further explanation, the driving assembly includes a threaded rod rotatably connected to the inner side of the movable plate, the threaded rod rotatably penetrates the support frame, the right side of the support frame is symmetrically rotatably connected to an internal threaded tube, the inner side of the internal threaded tube is threadedly connected to the threaded rod to drive the threaded rod to move, and a driving rod is rotatably connected to the support frame, and the end of the driving rod and the inner end of the internal threaded tube are transmitted through a bevel gear assembly.

[0008] Further explanation, the limiting assembly includes a load-bearing belt fixed between the two sides of the outside of the support frame, and Velcro is fixed to the two ends of the inner side of the load-bearing belt. The Velcro on both sides are in contact and cooperate to limit the load-bearing belt, and sponge pads are fixed on both sides of the load-bearing belt to protect the patient's head.

[0009] To further explain, the clamping assembly consists of an n-type frame, an arc-shaped clamping block and a return spring, wherein the n-type frame slides through the top of the support frame, the arc-shaped clamping block is fixed to the end of the n-type frame and contacts the arc-shaped block to clamp the throat and limit the position, and the return spring is symmetrically connected between the inner top of the n-type frame and the outer top of the support frame.

[0010] Further description, it also includes a locking assembly, which includes a rack embedded and fixed to the inner side of the extension plate, a fixing cylinder fixed to the bite plate, a locking rod rotatably connected to the inner side of the fixing cylinder, a guide gear rotatably mounted on the end of the locking rod, the guide gear is engaged with the rack to lock the extension plate, and a fixing assembly is provided on the support frame to fix the locking rod.

[0011] To further explain, the fixing assembly includes an air cushion fixed to the inner circumference of the fixing cylinder, the inner side of the air cushion contacts the locking rod to fix the locking rod, a single-rod piston cylinder is symmetrically fixed on the support frame, the piston rod of the single-rod piston cylinder is fixedly connected to the upper movable plate, the upper part of the single-rod piston cylinder is connected to an air guide pipe, the tail end of the air guide pipe is fixedly connected and communicated with the air cushion.

[0012] Further description, it also includes a tongue depressor assembly, which includes positioning blocks symmetrically fixed to the outer side of the upper bite plate, a rotating shaft rotatably connected between the positioning blocks, a tongue depressor frame for pressing the patient's tongue is symmetrically fixed on the rotating shaft, a slotted hole is opened on the front side of the tongue depressor frame, and a trigger assembly is arranged on the lower bite plate to drive the bite plate to swing.

[0013] To further explain, the trigger assembly includes a sliding rod slidably connected to the slotted hole of the tongue depressor, a buffer spring is symmetrically connected between the sliding rod and the inner side of the tongue depressor, a hinge rod is symmetrically fixed to the outer side of the lower bite plate, and the top end of the hinge rod is rotatably connected to the inner end of the sliding rod.

[0014] According to a further description, a rubber pad is also provided which is fixed to the inner side of the bite plate to protect the patient's teeth.

[0015] According to a further description, there is also an anti-pressure block symmetrically fixed to the inner side of the load-bearing belt to fill the gap between the load-bearing belt and the face.

[0016] The present invention has significant improvements in that: 1. Move the bite plate into the patient's mouth and make the bite plate correspond to the teeth. Then pull the pull rod through the connecting rod to drive the extension plate to move outward to a position suitable for the patient. Then twist the drive rod to rotate so that the bite plate and the extension plate move outward and contact the patient's teeth, thereby supporting and assisting the patient's teeth. Then extend the laryngoscope lens into the patient's throat for inspection. In this way, the support width can be adjusted according to needs to adapt to mouths of different sizes, thereby improving adaptability.

[0017] 2. Under the action of the air cushion, whenever the occlusal plate moves outward to support the patient's teeth, the air cushion expands to lock the locking rod, thereby locking the guide gear. The guide gear locks the extension plate through the rack, which can prevent the extension plate from moving during use and affecting the support and assistance to the patient's mouth, thereby improving the use effect of the extension plate.

[0018] 3. Under the action of the tongue depressor, whenever the bite plate moves outward to contact the patient's teeth, the tongue depressor can swing downward to contact the patient's tongue, thereby pressing the patient's tongue tightly, preventing the patient's tongue from lifting up and affecting the insertion of the laryngoscope lens, thereby ensuring that the laryngoscope lens is smoothly inserted into the patient's throat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a partial structural schematic diagram of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the sleeve and the extension plate of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the driving assembly of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the load-bearing belt and the Velcro tape of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the air guide tube and the single-rod piston cylinder of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the rack and the guide gear of the present invention.

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the tongue depressor of the present invention.

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the positioning short rod and the buffer spring of the present invention.

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the rubber pad and the anti-pressure block of the present invention.

[0029] Among them: 1-support frame, 2-arc block, 21-n-type frame, 22-arc clamping block, 23-reset spring, 3-movable plate, 4-bite plate, 5-sleeve, 6-extension plate, 7-connecting rod, 8-pull rod, 9-inner threaded tube, 91-threaded rod, 92-driving rod, 10-load-bearing belt, 101-sponge pad, 102-velcro, 11-single-rod piston cylinder, 111-air guide tube, 112-air cushion, 113-fixed cylinder, 114-locking rod, 115-guide gear, 116-rack, 12-tongue depressor, 121-positioning block, 122-rotating shaft, 123-hinge rod, 124-slide rod, 125-buffer spring, 13-rubber pad, 14-anti-pressure block. DETAILED DESCRIPTION

[0030] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0031] Embodiment: A mouth opening assisting device for laryngoscopy, see Figure 1-Figure 5As shown, it includes a support frame 1 and an arc block 2 fixed to the middle of the bottom of the support frame 1, a clamping assembly is arranged on the top of the support frame 1, and the clamping assembly consists of an n-shaped frame 21, an arc clamping block 22 and a reset spring 23, wherein the n-shaped frame 21 slides through the middle of the top of the support frame 1, the arc clamping block 22 is fixed to the bottom of the n-shaped frame 21 and contacts the arc block 2, the arc clamping block 22 can clamp the throat to limit the position, the reset spring 23 is symmetrically connected between the top of the n-shaped frame 21 and the top of the support frame 1, the top and bottom of the support frame 1 are slidably connected with a movable plate 3, the outer side surfaces of the movable plates 3 on the upper and lower sides are fixed with bite plates 4, and also include a sleeve 5 and an extension plate 6, connecting rod 7, pulling rod 8, driving assembly and load-bearing assembly for limiting the support frame 1, the sleeve 5 is symmetrically fixed to the inner side surfaces of the upper and lower bite plates 4, the inner sides of the four sleeves 5 are slidably connected with extension plates 6, the outer sides of the inner sides of each two extension plates 6 corresponding to the upper and lower sides are rotatably connected with connecting rods 7, and the inner ends of the two connecting rods 7 on the same side are rotatably connected with pulling rods 8. The driving assembly is used to control the bite plate 4 to move outward to open the patient's mouth. At the same time, the pulling rod 8 is controlled to move to drive the connecting rod 7 to move, and the connecting rod 7 moves to control the extension plate 6 to move, so that the extension plate 6 increases the width of the bite plate 4 to support mouths of different sizes.

[0032] See also Figure 4 As shown, the driving assembly includes an internal threaded tube 9, a threaded rod 91 and a driving rod 92. The right sides of the inner sides of the upper and lower movable plates 3 are rotatably connected with the threaded rods 91. The upper and lower threaded rods 91 rotatably penetrate the support frame 1. The right side of the support frame 1 is symmetrically rotatably connected with the internal threaded tube 9. The inner sides of the upper and lower internal threaded tubes 9 are respectively threadedly connected with the upper and lower threaded rods 91. When the internal threaded tube 9 rotates, the internal threaded tube 9 can drive the threaded rod 91 to move. The middle part of the right side of the support frame 1 is rotatably connected with the driving rod 92, and the left end of the driving rod 92 and the inner ends of the upper and lower internal threaded tubes 9 are driven by a bevel gear assembly.

[0033] See also Figure 5 As shown, the limiting component includes a load-bearing belt 10, a sponge pad 101 and a Velcro 102. The load-bearing belt 10 is fixed between the left and right outer side surfaces of the support frame 1, and the Velcro 102 is fixed at both ends of the inner side of the load-bearing belt 10. The Velcro 102 on the left and right sides are in contact and cooperate to limit the load-bearing belt 10. The sponge pads 101 are fixed to the lower parts of the left and right inner side surfaces of the load-bearing belt 10, and the sponge pads 101 can protect the patient's head.

[0034] First, the patient opens his mouth, and then the medical staff pulls the left and right Velcro 102 to separate and puts the load-bearing belt 10 on the patient's head, and then pulls the left and right Velcro 102 to cooperate to limit the load-bearing belt 10, and the sponge pad 101 contacts the patient's ears, thus protecting the patient's ears. Then move the support frame 1 so that the upper and lower bite plates 4 move into the patient's oral cavity, and the bite plates 4 correspond to the patient's teeth. Then, according to the size of the patient's oral cavity, pull the pull rod 8 outward to drive the connecting rod 7 to move outward, and the connecting rod 7 moves outward to drive the extension plate 6 to slide outward in the length direction of the bite plate 4. When the extension plate 6 slides outward to a position suitable for the patient, stop pulling the pull rod 8 to move outward, and the extension plate 6 also stops sliding outward. Then twist the driving rod 92 to rotate, and the driving rod 92 rotates through the bevel gear assembly to drive the internal threaded tube 9 to rotate, and the internal threaded tube 9 rotates to drive the threaded rod 91 to move outward, and the threaded rod 91 moves outward to drive the movable plate 3 to move outward. The movable plate 3 moves outwards to drive the bite plate 4 to move outwards, and the bite plate 4 moves outwards through the sleeve 5 to drive the extension plate 6 to move outwards toward the patient's teeth. When the extension plate 6 and the bite plate 4 move outwards and contact the teeth, the extension plate 6 and the bite plate 4 limit the patient's teeth, which also assists the laryngoscope examination. At this time, the patient's mouth is limited, the twisting of the driving rod 92 is stopped, and the n-shaped frame 21 is pulled upward to move, the reset spring 23 is stretched, and the n-shaped frame 21 moves upward to drive the arc The clamp block 22 moves upward and disengages from the arc block 2, and then the laryngoscope is passed between the arc clamp block 22 and the arc block 2, so that the lens of the laryngoscope extends into the patient's throat, and then the n-type frame 21 is released. Due to the action of the reset spring 23, the n-type frame 21 moves downward and resets, driving the arc clamp block 22 to move inward. The arc clamp block 22 moves inward and contacts the throat tube of the laryngoscope. The arc clamp block 22 cooperates with the arc block 2 to clamp and fix the throat, and then the laryngoscope can be used to examine the patient's throat. After the examination of the patient's throat is completed, the Velcro tapes 102 on the left and right sides are pulled apart to stop limiting the load-bearing belt 10, and the n-shaped frame 21 can be pulled to drive the arc-shaped clamping block 22 to loosen the throat tube, and the lens of the laryngoscope can be taken out, and then the n-shaped frame 21 is loosened to reset the arc-shaped clamping block 22, and then the driving rod 92 is twisted to rotate in the opposite direction, so that the threaded rod 91 drives the movable plate 3 to move inward and reset, and the movable plate 3 drives the bite plate 4 to move inward and reset, and the bite plate 4 drives the extension plate 6 to move inward and reset through the sleeve 5, and then the support frame 1 is moved to move the bite plate 4 outside the oral cavity, and the load-bearing belt 10 is removed from the head, and then the pull rod 8 is pulled to drive the extension plate 6 to slide inward and reset through the connecting rod 7. In this way, the support width can be adjusted according to needs to adapt to different sizes of mouths, thereby improving adaptability.

[0035] See also Figure 6 and Figure 7As shown, it also includes a locking component installed between the support frame 1 and the bite plate 4, the locking component includes a fixing component, a fixing cylinder 113, a locking rod 114, a guide gear 115 and a rack 116, the rear sides of the inner sides of the upper and lower extension plates 6 are embedded and fixed with racks 116, the outer sides of the front sides of the upper and lower bite plates 4 are fixed with fixing cylinders 113, the inner sides of the left and right fixing cylinders 113 are rotatably connected with locking rods 114, the rear ends of the left and right locking rods 114 are rotatably covered with guide gears 115, the left and right guide gears 115 are respectively meshed with the left and right racks 116, the cooperation of the guide gears 115 and the racks 116 can realize the locking of the extension plate, and the fixing component is provided on the support frame 1 When the fixing assembly is in operation, the fixing assembly can fix the locking rod 114; the fixing assembly includes a single-rod piston cylinder 11, an air guide tube 111 and an air cushion 112. The air cushion 112 is fixedly connected to the inner front side of the fixing cylinder 113 along the circumferential direction. The inner side of the air cushion 112 contacts the front side of the locking rod 114. When the air cushion 112 expands, the air cushion 112 can fix the locking rod 114. The single-rod piston cylinder 11 is symmetrically fixedly connected to the upper part of the support frame 1. The piston rods of the single-rod piston cylinders 11 on the left and right sides are respectively fixedly connected to the left and right sides of the upper movable plate 3. The upper rear sides of the single-rod piston cylinders 11 on the left and right sides are connected with two air guide tubes 111. The tail ends of the four air guide tubes 111 are respectively fixedly connected and communicated with the four air cushions 112.

[0036] See also Figure 8 and Fig. 9 As shown, it also includes a tongue depressor assembly installed between the upper and lower bite plates 4, the tongue depressor assembly includes a tongue depressor frame 12, a positioning block 121, a rotating shaft 122 and a trigger assembly, the positioning block 121 is symmetrically fixed to the outer rear side of the upper bite plate 4, the rotating shaft 122 is rotatably connected between the positioning blocks 121 on the left and right sides, and the tongue depressor frame 12 is symmetrically fixed to the rear side of the rotating shaft 122. When the tongue depressor frame 12 swings downward, the tongue depressor frame 12 can press the patient's tongue. The bottom of the tongue depressor frame 12 is evenly spaced with grooves, and the front sides of the left and right tongue depressor frames 12 are opened with a straight hole, and the lower bite plate 4 is opened. A trigger assembly is provided on the closing plate 4. When the trigger assembly is in operation, the trigger assembly can drive the bite plate 4 to swing. The trigger assembly includes a hinge rod 123, a slide rod 124 and a buffer spring 125. The slide rod 124 is slidably connected in the slotted holes of the left and right tongue depressor frames 12. The buffer springs 125 are symmetrically connected between the rear sides of the left and right slide rods 124 and the inner sides of the left and right tongue depressor frames 12. The hinge rods 123 are symmetrically fixed to the outer rear sides of the left and right bite plates 4 below. The top ends of the left and right hinge rods 123 are rotatably connected to the inner ends of the left and right slide rods 124 respectively.

[0037] When the medical staff pulls the pull rod 8 through the connecting rod 7 to drive the extension plate 6 to slide outward, the extension plate 6 slides outward to drive the rack 116 to slide outward, the rack 116 slides outward to drive the guide gear 115 to rotate, and the guide gear 115 rotates to drive the locking rod 114 to rotate. When the extension plate 6 is adjusted to a position suitable for the patient, the pull rod 8 is stopped from moving outward, the extension plate 6 stops driving the rack 116 to move outward, and then the drive rod 92 is twisted to rotate, so that the movable plate 3 drives the bite plate 4 to move outward to limit the patient's teeth, thereby supporting the patient's mouth. The outward movement of the movable plate 3 also drives the piston rod of the single-rod piston cylinder 11 to move outward, which also moves the single-rod piston cylinder 11 The air in the air guide tube 111 is pushed into the air guide tube 111, and the air in the air guide tube 111 is discharged into the air cushion 112. As the air is discharged, the air cushion 112 continuously expands to lock the locking rod 114, and the guide gear 115 is locked. The guide gear 115 is locked and cooperates with the rack 116 to lock the extension plate 6. When the movable plate 3 moves inward to reset, the movable plate 3 drives the piston rod of the single-rod piston cylinder 11 to move inward to reset, and the single-rod piston cylinder 11 also extracts the air in the air cushion 112 through the air guide tube 111, and the air is drawn back into the single-rod piston cylinder 11. As the air is drawn away, the air cushion 112 continuously shrinks and resets to loosen the locking rod 114, and the extension plate 6 stops being limited. In this way, the movement of the extension plate 6 during use can be prevented to affect the support and assistance to the patient's mouth, thereby improving the use effect of the extension plate 6.

[0038] When the upper and lower bite plates 4 move outward, the upper bite plate 4 drives the rotating shaft 122 to move outward through the positioning block 121, and the rotating shaft 122 moves outward to drive the tongue depressor 12 to move outward. At the same time, the lower bite plate 4 drives the hinge rod 123 to move outward, and the hinge rod 123 moves outward to drive the slide bar 124 to slide downward. The buffer spring 125 is compressed, and the slide bar 124 slides downward to drive the tongue depressor 12 to swing downward. The tongue depressor 12 swings downward and contacts the patient's tongue, and the tongue depressor 12 presses the patient's tongue tightly, and then subsequent operations are performed to allow the lens of the laryngoscope to extend into the patient's throat. When the upper and lower bite plates 4 move inwards to reset, the upper bite plate 4 drives the shaft 122 to move inwards through the positioning block 121, and the shaft 122 moves inwards to drive the tongue depressor 12 to move inwards to reset. At the same time, the lower bite plate 4 drives the hinge rod 123 to move inwards to reset, and the hinge rod 123 moves inwards to drive the slide bar 124 to move inwards to reset. The slide bar 124 stretches the buffer spring 125 to reset, and then the slide bar 124 drives the tongue depressor 12 to swing outwards to reset. In this way, the patient's tongue can be prevented from tilting up to affect the insertion of the laryngoscope lens, thereby ensuring that the laryngoscope lens can be smoothly inserted into the patient's throat.

[0039] See also Fig.10As shown, a rubber pad 13 is also included. The inner sides of the upper and lower bite plates 4 are fixed with rubber pads 13. When the patient's teeth are in contact with the rubber pads 13, the rubber pads 13 can protect the patient's teeth.

[0040] See also Fig.10 As shown, an anti-pressure block 14 is also included. The anti-pressure block 14 is symmetrically fixed to the inner front side of the load-bearing belt 10. The anti-pressure block 14 can fill the gap between the load-bearing belt 10 and the face.

[0041] When the bite plate 4 moves outward, the bite plate 4 drives the rubber pad 13 to move outward, and the rubber pad 13 moves outward to contact the patient's teeth. The bite plate 4 supports and assists the patient's teeth through the rubber pad 13, and the rubber pad 13 provides buffering protection for the teeth. When the bite plate 4 moves inward to reset, the bite plate 4 drives the rubber pad 13 to move outward to reset. In this way, it can prevent the teeth from directly contacting the bite plate 4 and causing pain, thereby ensuring the patient's comfort of being supported and assisted.

[0042] When the load-bearing belt 10 is put on the patient's head, the anti-pressure block 14 contacts the patient's face, and the anti-pressure block 14 fills the gap between the load-bearing belt 10 and the face. In this way, the gap between the load-bearing belt 10 and the patient's face can be prevented from affecting the stability of the load-bearing belt 10, thereby ensuring the stability of the device.

[0043] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in the field of technology based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A mouth opening auxiliary device for laryngoscope examination, comprising a support frame (1) and an arc block (2) fixed to the inner bottom of the support frame (1), a clamping assembly is arranged on the support frame (1), a movable plate (3) is slidably connected to the top and bottom of the support frame (1), and a bite plate (4) is fixed to the outer side of the movable plate (3), characterized in that: The invention also comprises a sleeve (5), an extension plate (6), a connecting rod (7), a pull rod (8), a driving assembly and a load-bearing assembly for limiting the position of the support frame (1), wherein the sleeve (5) is symmetrically fixed to the inner side of the bite plate (4), the inner side of the sleeve (5) is slidably connected to the extension plate (6), the outer side of the inner side of the corresponding extension plate (6) is rotatably connected to the connecting rod (7), and the inner ends of the connecting rods (7) on the same side are rotatably connected to the pull rods (8), and the driving assembly is used to control the bite plate (4) to move outward to open the patient's mouth, and at the same time, control the pull rod (8) to move to drive the connecting rod (7), and the movement of the connecting rod (7) controls the movement of the extension plate (6), so that the extension plate (6) increases the width of the bite plate (4) to support mouths of different sizes.

2. A mouth opening auxiliary device for laryngoscopy according to claim 1, characterized in that: The driving assembly comprises a threaded rod (91) rotatably connected to the inner side of the movable plate (3), the threaded rod (91) rotatably penetrates the support frame (1), the right side of the support frame (1) is symmetrically rotatably connected to an internal threaded tube (9), the inner side of the internal threaded tube (9) is threadedly connected to the threaded rod (91) to drive the threaded rod (91) to move, and a driving rod (92) is rotatably connected to the support frame (1), and a bevel gear assembly is used to transmit power between the end of the driving rod (92) and the inner end of the internal threaded tube (9).

3. A mouth opening auxiliary device for laryngoscopy according to claim 2, characterized in that: The limiting component comprises a load-bearing belt (10) fixed between two outer sides of the support frame (1), and hook and loop fasteners (102) are fixedly connected to the two inner ends of the load-bearing belt (10), and the hook and loop fasteners (102) on both sides are in contact and cooperate with each other to limit the load-bearing belt (10), and sponge pads (101) are fixedly connected to the inner sides of the load-bearing belt (10) to protect the patient's head.

4. A mouth opening auxiliary device for laryngoscopy according to claim 1, characterized in that: The clamping assembly consists of an n-shaped frame (21), an arc-shaped clamping block (22) and a return spring (23), wherein the n-shaped frame (21) slides through the top of the support frame (1), the arc-shaped clamping block (22) is fixed to the end of the n-shaped frame (21) and contacts the arc-shaped block (2) to clamp the throat and limit the position, and the return spring (23) is symmetrically connected between the inner top of the n-shaped frame (21) and the outer top of the support frame (1).

5. The mouth opening auxiliary device for laryngoscopy according to claim 3, characterized in that: The invention also comprises a locking assembly, the locking assembly comprising a rack (116) embedded and fixedly connected to the inner side of the extension plate (6), a fixing cylinder (113) fixedly connected to the bite plate (4), a locking rod (114) rotatably connected to the inner side of the fixing cylinder (113), a guide gear (115) rotatably mounted on the end of the locking rod (114), the guide gear (115) meshing with the rack (116) to lock the extension plate, and a fixing assembly is arranged on the support frame (1) to fix the locking rod (114).

6. A mouth opening auxiliary device for laryngoscopy according to claim 5, characterized in that: The fixing assembly comprises an air cushion (112) fixedly connected to the inner circumference of the fixing cylinder (113), the inner side of the air cushion (112) contacts the locking rod (114) to fix the locking rod (114), a single-rod piston cylinder (11) is symmetrically fixedly connected to the support frame (1), the piston rod of the single-rod piston cylinder (11) is fixedly connected to the upper movable plate (3), the upper part of the single-rod piston cylinder (11) is connected to the air guide pipe (111), and the tail end of the air guide pipe (111) is fixedly connected and connected to the air cushion (112).

7. A mouth opening auxiliary device for laryngoscopy according to claim 6, characterized in that: The device also comprises a tongue depressor assembly, which comprises positioning blocks (121) symmetrically fixed to the outer sides of the upper bite plate (4), a rotating shaft (122) rotatably passing through the positioning blocks (121), a tongue depressor frame (12) for pressing the patient's tongue symmetrically fixed to the rotating shaft (122), a slotted hole being formed on the front side of the tongue depressor frame (12), and a trigger assembly being arranged on the lower bite plate (4) to drive the bite plate (4) to swing.

8. A mouth opening auxiliary device for laryngoscope examination according to claim 7, characterized in that: The trigger assembly comprises a slide bar (124) slidably connected to a slotted hole of a tongue depressor frame (12); a buffer spring (125) is symmetrically connected between the slide bar (124) and the inner side of the tongue depressor frame (12); a hinge rod (123) is symmetrically fixed to the outer side of the lower bite plate (4); and the top end of the hinge rod (123) is rotatably connected to the inner end of the slide bar (124).

9. A mouth opening auxiliary device for laryngoscopy according to claim 8, characterized in that: It also includes a rubber pad (13) fixed to the inner side of the bite plate (4) to protect the patient's teeth.

10. The mouth opening auxiliary device for laryngoscopy according to claim 9, characterized in that: It also includes an anti-pressure block (14) symmetrically fixed to the inner side of the load-bearing belt (10) to fill the gap between the load-bearing belt (10) and the face.

Images