An expander for oral care
The design of the rotating fitting mechanism and the detachable soft rubber sleeve solves the problem that existing oral dilators cannot adapt to different patients' anatomical structures, achieving precise adjustment and cushioning and anti-slip effects, thus improving the user experience and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GENERAL HOSPITAL OF SOUTHERN THEATRE COMMAND OF PLA
- Filing Date
- 2025-04-30
- Publication Date
- 2026-06-02
AI Technical Summary
Existing oral dilators mostly use gear-type single-axis adjustment mechanisms, which cannot adapt to the differences in oral anatomy among patients of different ages. In addition, the contact end of the traditional dilator arm is made of hard plastic, which can easily cause gingival indentation and makes operation complicated.
It adopts a rotary engagement mechanism, including an arc rack and adjusting gear, to achieve continuous angle adjustment from 0 to 90°. Combined with a detachable soft rubber sleeve, it provides a cushioning and anti-slip function. The flexible connection between the moving expansion arm and the fixed expansion arm is achieved through the bending guard arm and the rotating joint.
It achieves precise adjustment for different open bite requirements, provides stable support and is easy to operate. The soft rubber sleeve provides a cushioning and anti-slip effect, adapts to different patient anatomy, simplifies operation and reduces the risk of gingival indentation.
Smart Images
Figure CN224307446U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an expander for oral care, belonging to the field of oral care medical device technology. Background Technology
[0002] With the development of oral medicine, the demand for maxillofacial support and fixation during oral treatment is increasing. Existing oral expanders mostly use gear-type single-axis adjustment mechanisms, which have the drawback of fixed angle adjustment levels, making them unsuitable for adapting to the differences in oral anatomy among patients of different ages. The contact ends of traditional expander arms are mostly made of hard plastic, which can easily cause gingival indentation with prolonged use. While some multi-functional products come with additional modules, their complex structure leads to complicated operation. Utility Model Content
[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an expander for oral care.
[0004] According to an embodiment of this utility model, the first embodiment is provided as follows: an expander for oral care, comprising a fixed expander arm and a movable expander arm that can rotate relative to each other. The fixed expander arm and the movable expander arm each include a vertical rod, a bending member, a horizontal rod, and a soft rubber sleeve with the same structure. The soft rubber sleeve is detachably fitted onto the end of the horizontal rod. The horizontal rod is connected to the vertical rod through the bending member, and there is a first included angle between the horizontal rod and the vertical rod. The movable expander arm is connected to the fixed expander arm through a rotational engagement mechanism, and the rotational engagement mechanism controls a second included angle between the movable expander arm and the fixed expander arm.
[0005] Furthermore, the rotary engagement mechanism includes an arc-shaped rack disposed on the fixed expansion arm and an adjusting gear disposed on the movable expansion arm. The adjusting gear on the movable expansion arm is adapted to the inner teeth of the arc-shaped rack on the fixed expansion arm. Rotating the adjusting gear causes the adjusting gear to move along the inner teeth of the arc-shaped rack and drives the movable expansion arm to rotate relative to the fixed expansion arm.
[0006] Furthermore, the rotary mating mechanism also includes a bent guard arm, a rotary joint, and a mating groove on the moving expansion arm, as well as a mating seat and a fixed rotating shaft on the fixed expansion arm;
[0007] The arc-shaped rack is fixed on the mating seat. The bending arm, arc-shaped rack, and mating seat of the rotating mating mechanism are basically located on the same assembly surface. One end of the bending arm can be rotatably assembled on the mating seat through a rotating joint and a fixed rotating shaft.
[0008] The bending guard arm is provided with a mating groove for one end of the arc-shaped rack to pass through. The adjusting gear is set at the mating groove of the bending guard arm through the adjusting cap and the adjusting shaft. Rotating the adjusting cap drives the adjusting gear to move along the inner teeth of the arc-shaped rack and drives the bending guard arm to rotate relative to the moving expansion arm around the fixed shaft.
[0009] Furthermore, the bending guard arm includes a first arm, a second arm, and a third arm. The first arm is connected to the vertical rod, the second arm is disposed between the first arm and the third arm, and the third arm is rotatably connected to the mating seat through a rotating joint and a fixed rotating shaft.
[0010] Furthermore, the mating groove is provided on the third arm.
[0011] Furthermore, the bending direction of the transverse rod is perpendicular or nearly perpendicular to the mounting surface of the arc-shaped rack.
[0012] Furthermore, the first included angle ranges from 45° to 125°, the second included angle ranges from 0° to 90°, and the third included angle between the third arm and the mating seat ranges from 90° to 180°.
[0013] Furthermore, a tightening device is provided on one side of the adjustable cap head, which can fix or loosen the adjustable cap head at any rotation angle.
[0014] Furthermore, the bending guard arm is also provided with a tightening nut and a fixing pawl on one side of the adjusting cap. The adjusting cap is provided with adjusting teeth on the outside. The tightening nut rotates to drive the fixing pawl to swing and engage or disengage from the adjusting teeth of the adjusting cap to fix or release the adjusting cap.
[0015] Furthermore, the horizontal bar can rotate relative to the vertical bar via a bending member. The rotation action causes the horizontal bar to have at least two working positions relative to the vertical bar: an open position and a closed position. The closed position is a position where the angle between the horizontal bar and the vertical bar is less than 20°, and the open position is a position where the angle between the horizontal bar and the vertical bar is greater than or equal to 20°.
[0016] Compared with the prior art, the unique advantages of the technical solution provided in this application are as follows: The expander provided in this solution can achieve continuous angle adjustment from 0 to 90° to adapt to different jaw opening requirements through a rotational engagement mechanism. The end is equipped with a detachable disposable soft rubber sleeve to simultaneously achieve the functions of buffering, anti-slip, disinfection, and maintenance. The independent rotational engagement mechanism has the advantages of simple control, stable support, and precise adjustment. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] in:
[0019] Figure 1 This is a schematic diagram of the structure of an expander used for oral care in one embodiment;
[0020] Figure 2 This is a schematic diagram showing the included angles between components of an expander used for oral care in one embodiment;
[0021] Figure 3 This is a schematic diagram of the pawl engagement of an oral dilator used for oral care in one embodiment.
[0022] Figure label:
[0023] 10. Moving expansion arm; 11. Horizontal rod; 12. Vertical rod; 13. Bending component; 14. Soft rubber sleeve; 15. Bending guard arm; 151. First arm; 152. Second arm; 153. Third arm; 16. Rotary joint; 17. Mating groove; 20. Fixed expansion arm; 21. Mating seat; 22. Fixed rotating shaft; 30. Arc-shaped rack; 31. Internal gear; 40. Adjusting cap; 41. Adjusting gear; 50. Tightening nut; 51. Fixed pawl. Detailed Implementation
[0024] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0025] The technical problem addressed in this embodiment is that existing oral expanders mostly use gear-type single-axis adjustment mechanisms, which have the disadvantage of fixed angle adjustment levels and cannot adapt to the differences in oral anatomy among patients of different ages. The contact ends of traditional expander arms are mostly made of hard plastic, which can easily cause gingival indentations after prolonged use. Although some multifunctional products are equipped with additional modules, the structural stacking leads to complicated operation.
[0026] To address the aforementioned technical problems, this embodiment provides an expander for oral care, such as... Figure 1As shown, it includes a fixed expansion arm 20 and a movable expansion arm 10 that can rotate relative to each other. Both the fixed expansion arm 20 and the movable expansion arm 10 include a vertical rod 12, a bending member 13, a horizontal rod 11, and a soft rubber sleeve 14 with the same structure. The soft rubber sleeve 14 is detachably sleeved on the end of the horizontal rod 11. The horizontal rod 11 is connected to the vertical rod 12 through the bending member 13, and there is a first included angle between the horizontal rod 11 and the vertical rod 12. The movable expansion arm 10 is connected to the fixed expansion arm 20 through a rotational engagement mechanism, and the rotational engagement mechanism controls the second included angle between the movable expansion arm 10 and the fixed expansion arm 20.
[0027] Specifically, the rotating engagement mechanism includes an arc-shaped rack 30 disposed on the fixed expansion arm 20 and an adjusting gear 41 disposed on the movable expansion arm 10. The adjusting gear 41 on the movable expansion arm 10 is adapted to the inner teeth 31 on the inner side of the arc-shaped rack 30 on the fixed expansion arm 20. Rotating the adjusting gear 41 causes the adjusting gear 41 to move along the inner teeth 31 of the arc-shaped rack 30 and drives the movable expansion arm 10 to rotate relative to the fixed expansion arm 20.
[0028] Furthermore, the rotary fitting mechanism also includes a bent guard arm 15, a rotary joint 16, and a fitting groove 17 on the movable expansion arm 10, and a fitting seat 21 and a fixed rotating shaft 22 on the fixed expansion arm 20; the arc-shaped rack 30 is fixed on the fitting seat 21, and the bent guard arm 15, the arc-shaped rack 30, and the fitting seat 21 of the rotary fitting mechanism are basically located on the same assembly surface. One end of the bent guard arm 15 can be rotatably mounted on the fitting seat 21 through the rotary joint 16 and the fixed rotating shaft 22; the bent guard arm 15 is provided with a fitting groove 17 for one end of the arc-shaped rack 30 to pass through, and the adjusting gear 41 is set at the fitting groove 17 of the bent guard arm 15 through the adjusting cap 40 and the adjusting shaft. Rotating the adjusting cap 40 drives the adjusting gear 41 to move along the inner teeth 31 of the arc-shaped rack 30 and drives the bent guard arm 15 to rotate relative to the movable expansion arm 10 around the fixed rotating shaft 22.
[0029] Among them, such as Figure 2 As shown, the bending guard arm 15 includes a first arm 151, a second arm 152, and a third arm 153. The first arm 151 is connected to the vertical rod 12. The second arm 152 is disposed between the first arm 151 and the third arm 153. The third arm 153 is rotatably connected to the mating seat 21 via a rotating joint 16 and a fixed rotating shaft 22. The mating groove 17 is disposed on the third arm 153. The range of the first included angle is 45°-125°, the range of the second included angle is 0°-90°, and the range of the third included angle between the third arm 153 and the mating seat 21 is 90°-180°.
[0030] The expander provided by this solution can achieve continuous angle adjustment from 0 to 90° through a rotational engagement mechanism to adapt to different jaw opening requirements. The end is equipped with a removable disposable soft rubber sleeve 14 to simultaneously achieve the functions of buffering, anti-slip, disinfection and maintenance. The independent rotational engagement mechanism has the advantages of simple control, stable support and precise adjustment.
[0031] Furthermore, to prevent the user's bite from dislodging, such as Figure 3 As shown, the bending guard arm 15 is also provided with a tightening nut 50 and a fixing pawl 51 on one side of the adjusting cap 40. The adjusting cap 40 is provided with adjusting teeth on the outside. The tightening nut 50 rotates to drive the fixing pawl 51 to swing and engage or disengage from the adjusting teeth of the adjusting cap 40 to fix or release the adjusting cap 40.
[0032] The specific working process of this expander is as follows:
[0033] Initial preparation stage
[0034] The disinfected soft rubber sleeve 14 is fitted into the annular groove at the end of the transverse rod 11, ensuring that the anti-slip protrusions of the soft rubber sleeve are exposed.
[0035] When the horizontal bar 11 is opened from the receiving position to the extended position, the angle between the horizontal bar 11 and the vertical bar 12 is the first included angle (A);
[0036] By tightening the nut 50 to loosen the fixing pawl 51, and by rotating the adjusting cap 40, the moving expansion arm 10 is pushed away from the fixed expansion arm 20 through the rotation engagement mechanism.
[0037] Angle adjustment stage
[0038] The operator holds the mating seat 21 of the fixed expansion arm 20 and uses his thumb to turn the adjusting cap 40 to drive the adjusting gear 41 to rotate. The adjusting gear 41 meshes with the internal teeth 31 of the arc rack 30 to drive the bending guard arm 15 of the expansion arm 10 (composed of the first arm 151, the second arm 152, and the third arm 153) to rotate around the fixed rotating shaft 22, so that the second included angle (C) between the moving expansion arm 10 and the fixed expansion arm 20 gradually expands from 0 degrees to the target angle (maximum 90 degrees). At this time, the mating seat 21 and the third arm 153 are at the third included angle (B).
[0039] Fixing and Operation Phase
[0040] Tighten the nut 50 to engage the fixed pawl 51 with the adjusting teeth of the adjusting cap 40. By adjusting the nut 40 and the adjusting gear 41, the second included angle (C) between the moving expansion arm 10 and the fixed expansion arm 20 is fixed through the meshing relationship between the adjusting cap 40 and the adjusting gear 41 and the arc rack 30.
[0041] Oral care should begin at this time.
[0042] Post-processing stage
[0043] Rotate the adjusting cap 40 in the opposite direction to bring the second included angle (C) to zero, and lock the adjusting gear 41 by fixing the ratchet 51;
[0044] Remove the soft rubber sleeve 14 and place it in the ultraviolet disinfection chamber for irradiation sterilization;
[0045] The horizontal bar 11 is accommodated.
[0046] Furthermore, the horizontal bar 11 can rotate relative to the vertical bar 12 via the bending member 13. The rotation action causes the horizontal bar 11 to have at least two working positions relative to the vertical bar 12: an open position and a closed position. The closed position is the position where the angle between the horizontal bar 11 and the vertical bar 12 is less than 20°, and the open position is the position where the angle between the horizontal bar 11 and the vertical bar 12 is greater than or equal to 20°.
[0047] The folding structure between the horizontal bar 11 and the vertical bar 12 can reduce the product's storage volume and further optimize the product structure.
[0048] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application's patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application.
[0049] It should be noted that when an element is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.
[0051] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.
Claims
1. An expander for oral care, characterized in that, The device includes a fixed expansion arm and a movable expansion arm that can rotate relative to each other. Both the fixed and movable expansion arms include a vertical rod, a bending member, a horizontal rod, and a soft rubber sleeve with identical structures. The soft rubber sleeve is detachably fitted onto the end of the horizontal rod. The horizontal rod is connected to the vertical rod through the bending member, and there is a first included angle between the horizontal rod and the vertical rod. The movable expansion arm is connected to the fixed expansion arm through a rotational engagement mechanism, and the rotational engagement mechanism controls a second included angle between the movable and fixed expansion arms.
2. The expander for oral care according to claim 1, characterized in that, The rotary engagement mechanism includes an arc-shaped rack on the fixed expansion arm and an adjusting gear on the movable expansion arm. The adjusting gear on the movable expansion arm is adapted to the inner teeth of the arc-shaped rack on the fixed expansion arm. Rotating the adjusting gear causes the adjusting gear to move along the inner teeth of the arc-shaped rack and drives the movable expansion arm to rotate relative to the fixed expansion arm.
3. The expander for oral care according to claim 2, characterized in that, The rotary fitting mechanism also includes a bent guard arm, a rotary joint, and a fitting groove on the moving expansion arm, as well as a fitting seat and a fixed rotating shaft on the fixed expansion arm; The arc-shaped rack is fixed on the mating seat. The bending arm, arc-shaped rack, and mating seat of the rotating mating mechanism are basically located on the same assembly surface. One end of the bending arm can be rotatably assembled on the mating seat through a rotating joint and a fixed rotating shaft. The bending guard arm is provided with a mating groove for one end of the arc-shaped rack to pass through. The adjusting gear is set at the mating groove of the bending guard arm through the adjusting cap and the adjusting shaft. Rotating the adjusting cap drives the adjusting gear to move along the inner teeth of the arc-shaped rack and drives the bending guard arm to rotate relative to the moving expansion arm around the fixed shaft.
4. The expander for oral care according to claim 3, characterized in that, The bending guard arm includes a first arm, a second arm, and a third arm. The first arm is connected to a vertical rod, the second arm is disposed between the first arm and the third arm, and the third arm is rotatably connected to a mating seat through a rotating joint and a fixed rotating shaft.
5. The expander for oral care according to claim 4, characterized in that, The mating groove is located on the third arm.
6. The expander for oral care according to claim 3, characterized in that, The bending direction of the transverse rod is perpendicular or nearly perpendicular to the mounting surface of the arc-shaped rack.
7. The expander for oral care according to claim 4, characterized in that, The first included angle ranges from 45° to 125°, the second included angle ranges from 0° to 90°, and the third included angle between the third arm and the mating seat ranges from 90° to 180°.
8. The expander for oral care according to claim 3, characterized in that, A tightening device is also provided on one side of the adjustable cap, which can fix or loosen the adjustable cap at any rotation angle.
9. The expander for oral care according to claim 3, characterized in that, The bending guard arm is also provided with a tightening nut and a fixing pawl on one side of the adjusting cap. The adjusting cap is provided with adjusting teeth on the outside. The tightening nut rotates to drive the fixing pawl to swing and engage or disengage from the adjusting teeth of the adjusting cap to fix or release the adjusting cap.
10. The expander for oral care according to claim 1, characterized in that, The horizontal bar can rotate relative to the vertical bar via a bending member. The rotation action causes the horizontal bar to have at least two working positions relative to the vertical bar: an open position and a closed position. The closed position is the position where the angle between the horizontal bar and the vertical bar is less than 20°, and the open position is the position where the angle between the horizontal bar and the vertical bar is greater than or equal to 20°.