Improved mouth gag for use in restrained oral treatment

Abstract

The utility model relates to a kind of applied to the improved mouth gag of restraint lower oral treatment, belong to oral medical instrument technical field, including two mouth gag handles are set up and cross and cross through first pivot are hinged to each other, the same end of two slide bars two mouth gag handles is respectively set up first counterbore along its length direction, slide bar is set in first counterbore and along its length direction and mouth gag handle sliding connection, two L type connecting rods are respectively set in two slide bars far from mouth gag handle one end, adjusting mechanism is set on two mouth gag handles, for driving slide bar to and fro movement, the utility model changes the distance of two L type connecting rod horizontal section by mouth gag control forceps, to adjust the opening amplitude of the upper and lower jaw of patient's oral cavity, again using slide bar and adjusting mechanism, change the distance of two L type connecting rod horizontal section, the opening amplitude of the upper and lower jaw of oral cavity is adjusted again, realize the accurate control of oral cavity expansion amplitude.

Description

Technical Field

[0001] This utility model belongs to the field of oral medical device technology, specifically relating to a modified mouth opener used in restraint oral treatment. Background Technology

[0002] Treatment of special patient groups, such as children, in the field of oral healthcare often presents significant challenges. This is especially true when children require oral treatment while restrained due to fear or lack of cooperation. Ensuring the smooth progress of treatment, maintaining a stable oral opening and closing position, and guaranteeing treatment safety become critical issues in clinical practice. A modified mouth opener for restrained oral treatment is a specialized instrument developed to address this clinical need. Through structural optimization and functional innovation, it provides a more reliable and efficient oral opening solution for these special treatment scenarios, helping medical staff to smoothly complete examinations and treatments.

[0003] In existing technologies, traditional mouth openers used in oral treatment mostly employ a simple lever-type structure, with two symmetrical opening arms connected to a handle. The opening and closing of the handle drives the opening arms to open the mouth. The technical principle is mainly based on the lever principle, utilizing the external force applied by the handle to make the opening arms overcome the resistance of the oral tissues, thereby opening the mouth to a certain extent.

[0004] However, in practical applications, traditional mouth openers in the existing technology have limitations due to their lever structure. The adjustment of the opening range is mostly controlled by the opening and closing of the handle, which makes it difficult to accurately control the opening range of the mouth. During oral treatment, it is difficult to accurately adjust the opening range of the mouth opener according to the treatment needs. When the opening range is insufficient, it can affect the operating field of vision. When the opening range is too large, it can cause unnecessary damage to the patient's oral tissues. Summary of the Invention

[0005] In view of this, the present invention provides an improved mouth opener for oral treatment under restraint, in order to overcome the shortcomings of the prior art. The present invention enables precise control of the mouth opening range, avoiding insufficient opening range affecting the operating field of vision and excessive opening range causing unnecessary damage to the patient's oral tissues.

[0006] The technical solution of this utility model is: a modified mouth opener for oral treatment under restraint, comprising two mouth opener handles arranged crosswise and hinged together at the intersection by a first pivot to form a mouth opener control clamp; two slide rods with first countersunk holes at the same end of the two mouth opener handles along their length; the slide rods are disposed in the first countersunk holes and slidably connected to the mouth opener handles along their length; two L-shaped connecting rods are respectively disposed at the ends of the two slide rods away from the mouth opener handles; the vertical sections of the L-shaped connecting rods are coaxially fixedly connected to the slide rods; the horizontal sections of the two L-shaped connecting rods are parallel to the first pivot of the mouth opener handles and point to the same side; the horizontal sections of the L-shaped connecting rods respectively abut against the teeth of the upper and lower jaws to adjust the mouth opening range of the upper and lower jaws through the mouth opener handles; an adjustment mechanism is disposed on the two mouth opener handles; the output end of the adjustment mechanism is connected to the slide rods to drive the slide rods back and forth to readjust the mouth opening range of the upper and lower jaws.

[0007] Preferably, the adjusting mechanism includes: two adjusting threaded rings; a second countersunk hole is provided on one side of the first countersunk hole, the center lines of the second countersunk hole and the first countersunk hole are parallel to each other and connected; the adjusting threaded ring is disposed in the second countersunk hole and is parallel to its center line; the adjusting threaded ring is rotatably connected to the countersunk hole handle; a threaded groove is provided on the outer side of the slide rod along its length direction, the threaded groove engages with the adjusting threaded ring; the countersunk hole handle is disposed through the second countersunk hole on the side away from the slide rod; the edge of the adjusting threaded ring extends out of the second countersunk hole.

[0008] Preferably, a first elastic element is provided between the two mouth opener handles and is located on the side of the mouth opener handle away from the L-shaped connecting rod. The two ends of the first elastic element are respectively connected to the mouth opener handles so as to drive the two mouth opener handles to rotate in a direction away from each other.

[0009] Preferably, the two mouth opener handles are provided with limiting plates, which are perpendicular to the first rotating shaft. The limiting plates are located on the side of the mouth opener handles near the first elastic member. One end of the limiting plate is hinged to one of the mouth opener handles through a second rotating shaft, which is parallel to the first rotating shaft. A limiting groove is formed on the limiting plate along its length direction. Multiple limiting teeth are evenly spaced on one side of the limiting groove along its length direction. The limiting teeth are inclined towards the side near the second rotating shaft. A limiting rod is fixed on the side of the other mouth opener handle near the first elastic member and is parallel to the second rotating shaft. The limiting rod passes through the limiting groove.

[0010] Preferably, the limiting teeth are arc-shaped.

[0011] Preferably, the first elastic element is a plate, one end of which is fixedly connected to the side of one of the mouth opener handles away from the first rotating shaft, and the side of the other mouth opener handle close to the first rotating shaft abuts against the other end of the plate.

[0012] Preferably, groove retainers are fixed to the horizontal ends of the two L-shaped connecting rods on opposite sides, with the openings of the two groove retainers facing away from each other, and the center lines of the groove retainers being parallel to the first rotating shaft.

[0013] Preferably, one of the opening device handles is provided with an L-shaped fixing plate. The vertical section of the L-shaped fixing plate is parallel to the center line of the first rotating shaft and is fixedly connected to the opening device handle. The horizontal section of the L-shaped fixing plate is located between the two sliding rods and is parallel to them. The horizontal section of the L-shaped fixing plate has a through groove along its length. A locking block is provided in the groove and slides along its length. A second elastic element is connected between the side of the locking block near the first rotating shaft and the inner wall of the groove to drive the locking block to move away from the first rotating shaft.

[0014] Preferably, the end of the card block away from the second elastic element and the end of the slide groove away from the first rotating shaft are respectively provided with an arc shape, and the center lines of the two arc shapes are parallel to each other.

[0015] Preferably, an arc-shaped groove is provided on the side of the two mouth opener handles that are close to each other, and is located on the side of the mouth opener handles that are close to the slide rod. The arc-shaped groove is parallel to the center line of the first rotating shaft. When the two mouth opener handles are closed, the openings of the two arc-shaped grooves are aligned to form a saliva suction tube through hole. The center line of the saliva suction tube through hole is parallel to the through direction of the slide groove. Furthermore, the inner walls of the saliva suction tube through hole and the slide groove on the side away from the first rotating shaft are aligned.

[0016] Compared with existing technologies, this utility model provides an improved mouth opener for oral treatment under restraint. It consists of two mouth opener handles combined with a first rotating shaft to form a mouth opener control clamp. This clamp allows adjustment of the distance between the horizontal sections of two L-shaped connecting rods, thereby regulating the mouth opening width of the patient's upper and lower jaws. A sliding rod and adjustment mechanism allow the sliding rod to move within a first countersunk hole on the mouth opener handle, further adjusting the distance between the horizontal sections of the L-shaped connecting rods and the first rotating shaft. This again changes the distance between the horizontal sections of the two L-shaped connecting rods. Based on the initial adjustment of the mouth opening width using the mouth opener control clamp, this further adjustment allows for two-stage regulation of the mouth opening width. During oral treatment, the mouth opener's opening width can be precisely adjusted according to treatment needs, achieving accurate control of the mouth opening width. This avoids insufficient opening width affecting the operator's field of vision, and excessive opening width causing unnecessary damage to the patient's oral tissues. This mouth opener is convenient to use, has high adjustment precision, and is highly practical, making it worthy of widespread adoption. Attached Figure Description

[0017] Figure 1 This is a first perspective view of the opening device of this utility model; Figure 2 This is a second perspective view of the opening device of this utility model; Figure 3 This is a schematic diagram showing the separation of the L-shaped connecting rod and the sliding rod of this utility model; Figure 4 This is a utility model Figure 3 Enlarged diagram of point A in the diagram; Figure 5 This utility model presents an installation diagram of an L-shaped fixing plate. Detailed Implementation

[0018] This utility model provides a modified mouth opener for use in restrained oral treatment, which is described below in conjunction with... Figures 1 to 5 The present invention will be described in the structural schematic diagram.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Reference Figure 1 , Figure 3 , Figure 1 This is a first perspective view of the opening device in this embodiment. Figure 3 This is a schematic diagram showing the separation of the L-shaped connecting rod and the sliding rod in this embodiment. A modified mouth opener for use in restraint oral treatment includes two mouth opener handles 1 arranged crosswise and hinged together at the intersection via a first pivot to form a mouth opener control clamp. Two sliding rods 9 have first countersunk holes at the same end of each of the two mouth opener handles 1 along their length. The sliding rods 9 are disposed in the first countersunk holes and slidably connected to the mouth opener handles 1 along their length. Two L-shaped connecting rods 5 are respectively disposed at the ends of the two sliding rods 9 away from the mouth opener handles 1. The vertical section of the L-shaped connecting rod 5 is coaxially and fixedly connected to the sliding rod 9. The horizontal sections of the two L-shaped connecting rods 5 are parallel to the first pivot of the mouth opener handles 1 and point to the same side. The horizontal sections of the L-shaped connecting rods 5 abut against the teeth of the upper and lower jaws to adjust the mouth opening width of the upper and lower jaws via the mouth opener handles 1. An adjustment mechanism is disposed on the two mouth opener handles 1, and the output end of the adjustment mechanism is connected to the sliding rods 9 to drive the sliding rods 9 back and forth to readjust the mouth opening width of the upper and lower jaws.

[0021] In this embodiment, the mouth opener consists of two mouth opener handles 1 that are cross-connected and hinged together at the cross-section by a first pivot, forming a mouth opener control clamp. The mouth opener control clamp can be used to adjust the distance between the horizontal sections of the two L-shaped connecting rods 5. When the horizontal sections of the two L-shaped connecting rods 5 are in contact with the teeth of the patient's upper and lower jaws, the mouth opener control clamp can be used to adjust the mouth opener's opening width. Then, the adjustment mechanism drives the two sliding rods 9 to move in the first countersunk hole on the mouth opener handle 1, thereby adjusting the distance between the horizontal sections of the L-shaped connecting rods 5 and the first pivot, and then changing the distance between the horizontal sections of the two L-shaped connecting rods 5 again, thereby adjusting the mouth opener's opening width again. This two-stage adjustment of the opening width achieves precise control of the mouth opening width.

[0022] In this embodiment, the two mouth opener handles 1 are connected by crossing and the first rotating shaft to form a mouth opener control clamp structure. The slide bar 9 is then used to connect with the L-shaped connecting rod to form a stable oral cavity opening system. The slide bar and the adjustment mechanism are used to achieve precise control of the oral cavity opening range and ensure the stability of instrument positioning during treatment.

[0023] Reference Figure 4 , Figure 4 This is an enlarged schematic diagram of point A where the L-shaped connecting rod and the slide rod are separated in this embodiment. As a further optimization, this embodiment provides a specific composition of an adjustment mechanism, which includes: two adjusting threaded rings 8; a second countersunk hole 3 is provided on one side of the first countersunk hole for the opening tool handle 1; the center lines of the second countersunk hole 3 are parallel to and connected to the center lines of the first countersunk hole; the adjusting threaded ring 8 is disposed in the second countersunk hole 3 and is parallel to its center line; the adjusting threaded ring 8 is rotatably connected to the opening tool handle 1; a threaded groove 10 is provided on the outer side of the slide rod 9 along its length direction; the threaded groove 10 engages with the adjusting threaded ring 8; the opening tool handle 1 is disposed through the second countersunk hole 3 on the side away from the slide rod 9; and the edge of the adjusting threaded ring 8 extends out of the second countersunk hole 3.

[0024] In this embodiment, the adjustment mechanism uses two adjusting threaded rings 8 in conjunction with the threaded grooves 10 of the slide rod 9. This allows the operator to rotate the adjusting threaded rings 8 around their circumference, thereby driving the slide rod 9 to move back and forth in the first countersunk hole on the handle 1 of the mouth opener. This adjusts the length of the slide rod 9 extending out of the first countersunk hole and adjusts the distance between the horizontal section of the L-shaped connecting rod 5 and the first rotating shaft, thus achieving two-fold control of the mouth opener's opening amplitude.

[0025] Specifically, when using the mouth opener in this embodiment, precise opening and closing control is achieved by means of the cooperation between the threaded groove 10 on the slide rod 9 and the adjusting threaded ring 8. Rotating the adjusting threaded ring 8 can drive the slide rod 9 to slide in the first countersunk hole of the mouth opener handle 1, thereby driving the L-shaped connecting rod to move synchronously, thereby adjusting the mouth opening range. Furthermore, the adjustment mechanism of this structure can be self-locking, so that the distance between the horizontal sections of the two L-shaped connecting rods remains stable after adjustment, improving the stability of the mouth opener.

[0026] As a further optimization, in this embodiment, a first elastic element 15 is provided between the two mouth opener handles 1 and is located on the side of the mouth opener handle 1 away from the L-shaped connecting rod 5. The two ends of the first elastic element 15 are respectively connected to the mouth opener handle 1 so as to drive the two mouth opener handles 1 to rotate in a direction away from each other.

[0027] In this embodiment, a first elastic element 15 is provided between the two mouth opener handles 1. The first elastic element 15 is used to make the two mouth opener handles 1 rotate in a direction away from each other, so that the operator can control the opening range of the mouth opener control pliers by holding the two mouth opener handles 1 with one hand.

[0028] In this embodiment, the first elastic element 15 also has a buffering function during adjustment, further ensuring the stability of the treatment process, and is especially suitable for pediatric dental treatment scenarios.

[0029] As a further optimization, in this embodiment, two mouth opener handles 1 are provided with limiting plates 12, which are perpendicular to the first rotating shaft. The limiting plates 12 are located on the side of the mouth opener handle 1 near the first elastic member 15. One end of the limiting plate 12 is hinged to one of the mouth opener handles 1 through the second rotating shaft 11, which is parallel to the first rotating shaft. A limiting groove 13 is provided on the limiting plate 12 along its length direction. A plurality of limiting teeth 2 are provided at equal intervals on one side of the limiting groove 13 along its length direction. The limiting teeth 2 are inclined towards the side near the second rotating shaft 11. A limiting rod 14 is fixed on the side of the other mouth opener handle 1 near the first elastic member 15 and is parallel to the second rotating shaft 11. The limiting rod 14 passes through the limiting groove 13.

[0030] In this embodiment, the second rotating shaft 11, the limiting plate 12, and the limiting rod 14 are used in conjunction. When the operator holds the two mouth opener handles 1 with one hand and uses the first elastic element 15 to control and adjust the opening width of the mouth opener control clamp, the limiting rod 14 moves synchronously in the limiting slot 13 on the limiting plate 12. After the opening width of the mouth opener control clamp is adjusted, the limiting tooth 2 in the limiting slot 13 locks the limiting rod 14, thereby locking the opening width of the mouth opener control clamp.

[0031] In this embodiment, the opening and closing size of the two mouth opener handles 1 is locked by the limiting rod 14 and the limiting teeth 2 in the limiting slot 13, effectively preventing accidental closure of the mouth opener due to the child's struggle. The elastic force of the first elastic element 15 also assists in resetting the mouth opener handles 1, significantly improving safety during oral treatment. Simultaneously, the single-handed operation and adjustment feature, along with the self-locking of the limiting plate 12 and the limiting rod 14, greatly enhances ease of use.

[0032] Specifically, in this embodiment, when the operator pinches the two mouth opener handles 1, the limiting teeth 2 tilt towards the side closer to the second rotating shaft 11, causing the limiting rod 14 to move synchronously in the limiting slot 13 and move closer to the side of the second rotating shaft 11. After the mouth opener control clamp has been adjusted, the limiting rod 14 enters between one of the limiting teeth and the inner wall of the limiting slot 13 to lock the position of the limiting rod 14.

[0033] As a further optimization, the limiting tooth 2 in this embodiment is arc-shaped.

[0034] In this embodiment, the arc-shaped limiting teeth 2 ensure that the limiting rod 14 can smoothly pass through the limiting teeth 2 when it moves closer to the second rotating shaft 11, thus avoiding jamming.

[0035] As a further optimization, in this embodiment, the first elastic element 15 is a plate. One end of the plate is fixedly connected to the side of one of the mouth opener handles 1 away from the first rotating shaft, and the side of the other mouth opener handle 1 close to the first rotating shaft abuts against the other end of the plate.

[0036] In this embodiment, the first elastic element 15 is a plate, which is inclined between the two opening handles 1, further improving the stability of the first elastic element 15 rotating in a direction away from each other.

[0037] As a further optimization, in this embodiment, groove retainers 6 are fixed on the sides of the horizontal ends of the two L-shaped connecting rods 5 that are far apart from each other. The openings of the two groove retainers 6 are arranged back to back, and the center line of the groove retainer 6 is parallel to the first rotating shaft.

[0038] In this embodiment, a grooved retainer 6 is provided on the horizontal end of the L-shaped connecting rod 5. The mouths arranged back to back can stably bite the teeth of the patient's upper and lower jaws and provide stable support.

[0039] Reference Figure 5 , Figure 5This is a schematic diagram of the L-shaped fixing plate installation in this embodiment. As a further optimization, one of the opening tool handles 1 in this embodiment is provided with an L-shaped fixing plate 16. The vertical section of the L-shaped fixing plate 16 is parallel to the center line of the first rotating shaft and is fixedly connected to the opening tool handle 1. The horizontal section of the L-shaped fixing plate 16 is located between the two sliding rods 9 and is parallel to them. The horizontal section of the L-shaped fixing plate 16 has a through groove 17 along its length. A locking block 18 is provided in the groove 17 and slides along its length. A second elastic element 19 is connected between the side of the locking block 18 near the first rotating shaft and the inner wall of the groove 17 to drive the locking block 18 to move away from the first rotating shaft.

[0040] In this embodiment, an L-shaped fixing plate 16 is provided on one of the mouth opener handles 1. The second elastic element 19 drives the locking block 18 to move away from the first rotating shaft. When performing mouth open treatment on the patient, the suction tube is passed through the slide groove 17. The locking block 18 and the inner wall of the slide groove 17 away from the first rotating shaft clamp and fix the suction tube, thereby achieving continuous cleaning of saliva in the patient's mouth during the treatment process, effectively maintaining the cleanliness of the treatment environment, greatly reducing the risk of aspiration pneumonia caused by oral effusion, and freeing up the nurse's hands so that she can focus more on cooperating with the doctor's operation, significantly improving the efficiency of diagnosis and treatment.

[0041] Specifically, the second elastic element 19 can be a spring.

[0042] As a further optimization, in this embodiment, the end of the card block 18 away from the second elastic element 19 and the end of the slide groove 17 away from the first rotating shaft are respectively provided with arcs, and the center lines of the two arcs are parallel to each other.

[0043] In this embodiment, the end of the locking block 18 away from the second elastic member 19 and the end of the sliding groove 17 away from the first rotating shaft are arc-shaped, which can improve the stability of clamping the saliva suction tube and can clamp saliva suction tubes with different outer diameters.

[0044] As a further optimization, in this embodiment, an arc-shaped groove 7 is provided on the side of the two mouth opener handles 1 that are close to each other, and is located on the side of the mouth opener handle 1 that is close to the slide rod 9. The arc-shaped groove 7 is parallel to the center line of the first rotating shaft. When the two mouth opener handles 1 are closed, the openings of the two arc-shaped grooves 7 are aligned to form a saliva suction tube through hole. The center line of the saliva suction tube through hole is parallel to the through direction of the slide groove 17. Furthermore, the inner walls of the saliva suction tube through hole and the slide groove 17 on the side away from the first rotating shaft are aligned.

[0045] In this embodiment, the arc-shaped grooves 7 on the two mouth opener handles 1 are used to form a saliva suction tube through hole, which enables the saliva suction tube to pass through the saliva suction tube through hole and then enter the slide groove 17 for clamping and fixing. Thus, the saliva suction tube is installed when the two mouth opener handles 1 are closed before opening the mouth for the patient.

[0046] Specifically, such as Figure 1 As shown, when the two mouth opener handles 1 are opened to open the mouth of the patient, the L-shaped fixing plate 16 rotates to the left along with the mouth opener handle 1 it is fixed to, and the suction tube always abuts against the inner wall of the arc groove 7 on the mouth opener handle 1.

[0047] As a further optimization, in this embodiment, a rubber sleeve is fitted on the side of the opening tool handle 1 away from the L-shaped connecting rod 5.

[0048] In this embodiment, a rubber sleeve is provided on the gripping section of the mouth opener handle 1 to further improve the anti-slip performance of the mouth opener during gripping.

[0049] The mouth opener of this invention is constructed by two intersecting mouth opener handles 1, hinged together at the intersection by a first pivot. A sliding rod in the first countersunk hole on each handle 1 connects to an L-shaped connecting rod 5, forming the main structure of the mouth opener. The overall structure of this mouth opener is rationally designed. The grooved retainer 6 stabilizes the patient's oral cavity and provides instrument support. The mouth opener's opening width is first adjusted using a mouth opener control clamp composed of the two handles 1. The operator then rotates an adjusting threaded ring 8, utilizing the engagement between the adjusting threaded ring 8 and the threaded groove 10 on the sliding rod 9 to precisely adjust the length of the sliding rod 9 extending beyond the first countersunk hole, thus achieving secondary adjustment of the oral cavity opening width.

[0050] Furthermore, the opening and closing of the mouth opener control clamp, composed of the two mouth opener handles 1, can be locked by the limiting plates 12 and limiting rods 14 on the two mouth opener handles 1. This design prevents the instrument from accidentally closing due to the child's struggle, while also allowing for single-handed operation and adjustment. The buffering effect of the limiting plates 12 and limiting rods 14, together with the spring push plate 15, ensures the stability and safety of the treatment.

[0051] The above-disclosed embodiments are merely preferred embodiments of the present utility model. However, the embodiments of the present utility model are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A modified mouth opener for use in restrained oral treatment, comprising: Two mouth opener handles (1), arranged crosswise and hinged together at the intersection via a first pivot, constitute a mouth opener control clamp, characterized in that it further includes: Two sliding rods (9), and the same end of the two mouth opener handles (1) are respectively provided with a first countersunk hole along their length direction. The sliding rods (9) are set in the first countersunk hole and are slidably connected to the mouth opener handles (1) along their length direction. Two L-shaped connecting rods (5) are respectively set at the ends of the two slide rods (9) away from the mouth opener handle (1). The vertical section of the L-shaped connecting rod (5) is coaxially fixedly connected to the slide rod (9). The horizontal section of the two L-shaped connecting rods (5) is parallel to the first axis of rotation of the mouth opener handle (1) and the horizontal section points to the same side. The horizontal section of the L-shaped connecting rod (5) abuts against the teeth of the upper and lower jaws of the oral cavity, so as to adjust the opening range of the upper and lower jaws of the oral cavity through the mouth opener handle (1). An adjustment mechanism is provided on the two mouth opener handles (1). The output end of the adjustment mechanism is connected to the slide bar (9) to drive the slide bar (9) to move back and forth, so as to readjust the opening range of the upper and lower jaws.

2. The modified mouth opener for oral treatment under restraint as described in claim 1, characterized in that, The adjustment mechanism includes: two adjusting threaded rings (8), the opening tool handle (1) is located on one side of the first countersunk hole and has a second countersunk hole (3), the second countersunk hole (3) is parallel to and connected to the center line of the first countersunk hole, the adjusting threaded ring (8) is set in the second countersunk hole (3) and is parallel to its center line, the adjusting threaded ring (8) is rotatably connected to the opening tool handle (1), the outer side of the slide rod (9) is provided with a threaded groove (10) along its length direction, the threaded groove (10) engages with the adjusting threaded ring (8), the opening tool handle (1) is located on the side of the second countersunk hole (3) away from the slide rod (9) and the edge of the adjusting threaded ring (8) extends out of the second countersunk hole (3).

3. The modified mouth opener for oral treatment under restraint as described in claim 1, characterized in that, A first elastic element (15) is provided between the two mouth opener handles (1) and is located on the side of the mouth opener handle (1) away from the L-shaped connecting rod (5). The two ends of the first elastic element (15) are respectively connected to the mouth opener handle (1) so as to drive the two mouth opener handles (1) to rotate in a direction away from each other.

4. A modified mouth opener for use in restrained oral treatment according to claim 3, characterized in that, The two mouth opener handles (1) are provided with limiting plates (12) and are perpendicular to the first rotating shaft. The limiting plates (12) are located on the side of the mouth opener handle (1) near the first elastic member (15). One end of the limiting plate (12) is hinged to one of the mouth opener handles (1) through the second rotating shaft (11). The second rotating shaft (11) is parallel to the first rotating shaft. The limiting plate (12) has a limiting groove (13) along its length direction. A plurality of limiting teeth (2) are provided at equal intervals along the length direction on one side of the limiting groove (13). The limiting teeth (2) are inclined to the side near the second rotating shaft (11). The other mouth opener handle (1) is fixed with a limiting rod (14) on the side near the first elastic member (15) and is parallel to the second rotating shaft (11). The limiting rod (14) passes through the limiting groove (13).

5. A modified mouth opener for use in restrained oral treatment according to claim 4, characterized in that, The limiting tooth (2) is arc-shaped.

6. A modified mouth opener for use in restrained oral treatment according to claim 3, characterized in that, The first elastic element (15) is a plate. One end of the plate is fixedly connected to the side of one of the mouth opener handles (1) away from the first rotating shaft, and the other mouth opener handle (1) is close to the first rotating shaft and abuts against the other end of the plate.

7. A modified mouth opener for use in restrained oral treatment according to claim 1, characterized in that, The horizontal ends of the two L-shaped connecting rods (5) are respectively fixed with groove retainers (6) on opposite sides. The openings of the two groove retainers (6) are arranged back to back, and the center line of the groove retainer (6) is parallel to the first rotating shaft.

8. A modified mouth opener for use in restrained oral treatment according to claim 1, characterized in that, One of the opening device handles (1) is provided with an L-shaped fixing plate (16). The vertical section of the L-shaped fixing plate (16) is parallel to the center line of the first rotating shaft and is fixedly connected to the opening device handle (1). The horizontal section of the L-shaped fixing plate (16) is located between the two sliding rods (9) and is parallel to them. The horizontal section of the L-shaped fixing plate (16) has a through groove (17) along its length. The groove (17) is provided with a locking block (18) and slides along its length. The side of the locking block (18) near the first rotating shaft is connected to the inner wall of the groove (17) with a second elastic element (19) to drive the locking block (18) to move away from the first rotating shaft.

9. A modified mouth opener for use in restrained oral treatment according to claim 8, characterized in that, The end of the card block (18) away from the second elastic element (19) and the end of the slide groove (17) away from the first rotating shaft are respectively provided with arcs, and the center lines of the two arcs are parallel to each other.

10. A modified mouth opener for oral treatment under restraint as described in claim 8, characterized in that, An arc-shaped groove (7) is provided on one side of the two mouth opener handles (1) that are close to each other, and is located on the side of the mouth opener handle (1) that is close to the slide rod (9). The arc-shaped groove (7) is parallel to the center line of the first rotating shaft. When the two mouth opener handles (1) are closed, the openings of the two arc-shaped grooves (7) are aligned to form a saliva suction tube through hole. The center line of the saliva suction tube through hole is parallel to the through direction of the slide groove (17). The inner walls of the saliva suction tube through hole and the slide groove (17) on the side away from the first rotating shaft are aligned.

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