Abrasion resistance testing device for dental restoration material and operation process of abrasion resistance testing device

Abstract

The invention belongs to the technical field of detection devices, and particularly relates to a wear resistance testing device for a dental restoration material and an operation flow thereof.The wear resistance testing device comprises a transparent box, two testing structures which are distributed up and down and opposite in position are fixedly connected to the upper side of the interior of the transparent box, and humidifying structures are arranged on the left side and the right side of the transparent box; a transparent box door is movably connected to the right side of the front portion of the transparent box body, and a control panel is fixedly installed on the upper portion of the front side of the transparent box door. According to the device, the two testing structures which correspond to each other up and down are arranged in the transparent box body, when the device is used, the oral cavity repairing materials can be clamped and fixed in the fixing assemblies in the two testing structures respectively, after the device is started, the two fixing assemblies make contact with each other at a slight inclined included angle, the two repairing materials are rubbed, and the testing effect is good. Therefore, the normal oral chewing action is simulated, the maximum daily wear action of the user on the oral repair material can be restored, and accurate data recording is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of detection devices, in particular to a wear resistance testing device for oral restoration materials and an operation flow thereof. Background Art

[0002] Oral diseases are common, and dental diseases are the most common. Among them, oral and systemic diseases induced by caries seriously affect human health. The incidence of caries in my country is as high as 80%, and the prevalence rate among the elderly is as high as 98.4%. Dental care and treatment are urgent. According to the degree of caries, the main repair methods include fillings to repair caries (such as composite resins, silver-mercury alloys, etc.) and whole teeth to replace caries (such as ceramics, metal implants, etc.), and the key to repair is oral repair materials. Researching and developing feasible materials and improving product performance provide a direct and effective solution to meet clinical needs and solve dental problems.

[0003] After searching, in a simulated toothbrushing device for wear resistance testing of oral restoration materials with announcement number CN105547881B, the invention discloses a simulated toothbrushing device for wear resistance testing of oral restoration materials, including a shell, and the inner cavity of the shell is sequentially installed with a solvent storage device, a slide rail and a slide groove from top to bottom, the solvent storage device is fixedly connected to the top of the shell, a cover plate is installed on the top of the solvent storage device, and the cover plate is located on the upper side of the shell, the slide rail is sequentially installed with a left slider and a right slider from left to right, the left end of the left slider is connected to the left inner wall of the shell through a second telescopic rod, a grinding motor is installed inside the left slider, the shaft end of the grinding motor is a spline shaft and is installed in cooperation with a spline sleeve, the lower end of the spline sleeve is connected to the grinding wheel, and the spline sleeve is connected to the lower end surface of the left slider through a second telescopic bracket.

[0004] The above-mentioned wear resistance test device realizes a fully automatic unattended experimental process, and the equipment adopts a fully sealed experimental environment, which effectively avoids the influence of the external environment on the experimental results, and helps to improve the credibility of the experimental results. However, there are still some problems in the actual use of the equipment:

[0005] The above-mentioned device uses a grinding wheel to test the grinding of oral restoration materials. After the patient completes tooth restoration with oral restoration materials, the number of times the teeth are brushed during use can only be considered a small part. More wear and tear is caused by the mutual friction of the teeth when chewing, which will cause the detection data of the above-mentioned device to be inaccurate.

[0006] Therefore, in order to solve the above problems, a wear resistance testing device for oral restoration materials and an operation process thereof are proposed. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides a wear resistance testing device for oral restorative materials and its operating procedures, which solves the problem that the above-mentioned device only performs a brushing simulation test on the restorative material through a grinding wheel, which may deviate from the actual use of the restorative material and easily cause inaccurate data.

[0009] (II) Technical solution

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wear resistance testing device for oral restoration materials, comprising a transparent box, wherein two test structures distributed up and down and positioned oppositely are fixedly connected to the upper side of the transparent box, a humidification structure is arranged on the left and right sides of the transparent box, a transparent box door is movably connected to the right side of the front of the transparent box, a control panel is fixedly installed on the upper part of the front side of the transparent box door, a handle is fixedly connected to the left side of the front of the transparent box door, supporting feet are fixedly connected to the four corners of the lower part of the transparent box, and a plurality of air holes distributed in an equidistant array are opened on the upper part of the transparent box;

[0011] The test structure includes a fixed beam, a fixed seat is fixedly connected to the middle part of the rear side of the fixed beam, a motor is fixedly connected to the upper side or the lower side of the fixed seat, a turntable is fixedly connected to the output end of the motor, a groove is provided in the middle part of a side of the fixed beam close to the turntable, a guide hole slightly inclined to one side is provided in the groove on the side away from the turntable, a connecting rod is movably connected to a connecting rod on the side of the connecting rod away from the turntable, a first threaded hole is provided on the side of the fixed rod away from the connecting rod, a fixing component is threadedly connected to the first threaded hole, the fixing rod is slidably connected to the guide hole, and the fixing component is located on the side of the fixed beam away from the turntable.

[0012] Preferably, the fixing assembly includes a C-shaped fixing buckle, a connecting head is fixedly connected to one side of the C-shaped fixing buckle close to the fixing rod, a second threaded hole is opened on the left and right sides of the C-shaped fixing buckle, adjustment bolts are threadedly connected inside the two second threaded holes, the two adjusting bolts are movably connected to a splint on one side close to each other, and the two splints are fixedly connected to a soft rubber pad on one side close to each other, the two splints and the two soft rubber pads are located inside the C-shaped fixing buckle, and the connecting head is threadedly connected to the first threaded hole.

[0013] Preferably, a protrusion is fixedly connected to the lower wall of the transparent box and a circular groove is provided, the circular groove is located outside the protrusion, and the left wall and the right part of the circular groove are fixedly connected to two support blocks distributed front and back.

[0014] Preferably, a grid is supported inside the zigzag groove by four support blocks, filter cotton is laid on the upper part of the grid, a first connecting hole communicating with the zigzag groove is opened on the lower left and right parts of the transparent box body, and the two first connecting holes are located at the lower part of the four support blocks, and a second connecting hole is opened on the upper left and right parts of the transparent box body.

[0015] Preferably, the humidification structure includes a liquid tank, which is fixedly connected to the transparent box body, a first connecting pipe is fixedly connected to the lower part of the liquid tank, a one-way valve is provided on the first connecting pipe, the first connecting pipe is fixedly connected to the first connecting hole through insertion, and the one-way valve is located outside the transparent box body, and a discharge pipe is fixedly connected to the lower part of the side of the liquid tank away from the transparent box body.

[0016] Preferably, a filling port is provided on the front side of the upper part of the liquid tank, a circulating pump is fixedly connected to the middle part of the upper side of the liquid tank, a second connecting pipe is fixedly connected to the output end of the circulating pump, a side of the second connecting pipe away from the liquid tank is fixedly connected to the nozzle, and the second connecting pipe is fixedly connected to the second connecting hole through which the nozzle extends to one side of the fixed component.

[0017] An operating procedure of a wear resistance testing device for oral restoration materials comprises the following steps:

[0018] Step 1: Device debugging: First, according to the requirements of the test conditions, the fixed components in the test structure are replaced so that the fixed components can clamp the test materials and test tools;

[0019] Step 2: Installation of oral restoration materials: loosen the adjustment bolt in the fixing assembly, place the test material between the two soft rubber pads, and then tighten the two adjustment bolts so that the two splints can clamp the irregular test material through the soft rubber pads;

[0020] Step 3, material testing: start the two test structures, make the motor drive the turntable to rotate, and push the fixed rod and the fixed assembly to make reciprocating motion through the turntable, so that the test materials fixed in the two test structures rub against each other. At the same time, the humidification structures set on both sides of the transparent box spray water to the test materials in the two tests at the same time to simulate the internal environment of the oral cavity;

[0021] Step 4, liquid recovery: The liquid sprayed by the humidification structure can wash away the debris generated by the friction of the test material. At the same time, the liquid containing the debris falls to the bottom of the box and is filtered by the filter cotton. The filtered liquid enters the serpentine groove at the bottom of the transparent box and can be pumped back to the liquid tank through the circulation pump in the humidification structure for continued use.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides a wear resistance testing device for oral restoration materials and its operation process, which has the following beneficial effects:

[0024] 1. The invention provides two corresponding test structures in the upper and lower parts inside the transparent box. When the device is in use, the oral restoration materials can be clamped and fixed in the fixing components in the two test structures respectively. After starting the device, the two fixing components will contact each other at a slight inclined angle, and cause the two restoration materials to rub, thereby simulating the normal oral chewing action, which can better restore the user's daily maximum wear action on the oral restoration materials and facilitate the recording of accurate data.

[0025] 2. The invention sets the fixing components in the test structure as a threaded connection structure. When the device is in use, the fixing parts of different structures can be replaced according to the use requirements, and the two test structures in the device can be controlled separately, so that the device can realize a variety of different wear test operations, which can improve the practicality of the device.

[0026] 3. The invention provides humidification structures on both sides of the transparent box. When the device is in use, the two humidification structures can moisten the space between the fixed components in the two test structures, so that the oral restoration materials fixed in the fixed components can simulate the moist environment of the real oral cavity for testing, which can further improve the accuracy of the test.

[0027] 4. The invention provides a zigzag groove on the lower side of the transparent box, and provides a mesh frame and filter cotton in the zigzag groove. When the device is in use, the liquid sprayed from the humidification structure can filter the internal particles through the filter cotton when flowing to the bottom of the box. The filtered liquid can be pumped back into the liquid tank through the circulation pump in the humidification structure for continued use, which can reduce the cost of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0031] Figure 3 It is a schematic cross-sectional view of the transparent identical three-dimensional structure of the present invention;

[0032] Figure 4 is a schematic diagram of the three-dimensional structure of the test structure of the present invention;

[0033] Figure 5 It is a three-dimensional structural schematic diagram of the fixing assembly of the present invention;

[0034] Figure 6 It is a three-dimensional structural schematic diagram of the humidification structure of the present invention.

[0035] In the figure: 1, transparent box; 2, test structure; 3, humidification structure; 4, transparent box door; 5, control panel; 6, handle; 7, support foot; 8, air vent; 11, bump; 12, round groove; 13, support block; 14, grid; 15, filter cotton; 16, first connecting hole; 17, second connecting hole; 21, fixed beam; 22, fixed seat; 23, groove; 24, guide hole; 25, motor; 26, rotating Plate; 27, connecting rod; 28, fixing rod; 29, fixing assembly; 281, first threaded hole; 291, C-type fixing buckle; 292, connecting head; 293, second threaded hole; 294, adjusting bolt; 295, clamping plate; 296, soft rubber pad; 31, liquid tank; 32, first connecting pipe; 33, discharge pipe; 34, filling port; 35, circulation pump; 36, second connecting pipe; 37, nozzle; 38, one-way valve. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Specific examples are given below.

[0038] See also Figure 1-Figure 6 The present invention provides a wear resistance testing device for oral restoration materials, comprising a transparent box 1, two test structures 2 which are distributed up and down and relatively positioned are fixedly connected to the upper side of the transparent box 1, a humidification structure 3 is arranged on the left and right sides of the transparent box 1, a transparent box door 4 is movably connected to the right side of the front of the transparent box 1, a control panel 5 is fixedly installed on the upper front side of the transparent box door 4, a handle 6 is fixedly connected to the left side of the front of the transparent box door 4, supporting feet 7 are fixedly connected to the four corners of the lower part of the transparent box 1, and a plurality of air holes 8 distributed in an equidistant array are opened on the upper part of the transparent box 1.

[0039] Further Figure 2 , Figure 4 and Figure 5As shown, the test structure 2 includes a fixed beam 21, a fixed seat 22 is fixedly connected to the middle of the rear side of the fixed beam 21, a motor 25 is fixedly connected to the upper side or the lower side of the fixed seat 22, a turntable 26 is fixedly connected to the output end of the motor 25, a groove 23 is opened in the middle of one side of the fixed beam 21 close to the turntable 26, a guide hole 24 slightly inclined to one side is opened in the groove 23 on the side away from the turntable 26, a connecting rod 27 is movably connected to one side of the front of the turntable 26, a fixing rod 28 is movably connected to the side of the connecting rod 27 away from the turntable 26, a first threaded hole 281 is opened on the side of the fixing rod 28 away from the connecting rod 27, a fixing assembly 29 is threadedly connected to the first threaded hole 281, and the fixing rod 28 and the guide hole 24 are connected. The fixing assembly 29 is slidably connected, and the fixing assembly 29 is located at the side of the fixing beam 21 away from the rotating disk 26. The fixing assembly 29 includes a C-shaped fixing buckle 291. A connecting head 292 is fixedly connected to the side of the C-shaped fixing buckle 291 close to the fixing rod 28. Second threaded holes 293 are provided on the left and right sides of the C-shaped fixing buckle 291. Adjusting bolts 294 are threadedly connected inside the two second threaded holes 293. Clamps 295 are movably connected to the sides of the two adjusting bolts 294 close to each other. Soft rubber pads 296 are fixedly connected to the sides of the two clamps 295 close to each other. The two clamps 295 and the two soft rubber pads 296 are located inside the C-shaped fixing buckle 291, and the connecting head 292 is threadedly connected to the first threaded hole 281.

[0040] Through the above scheme: the invention sets two upper and lower corresponding test structures 2 inside the transparent box 1. When the device is in use, the oral restoration materials can be clamped and fixed in the fixing components 29 in the two test structures 2 respectively. After starting the equipment, the two fixing components 29 will contact each other at a slightly inclined angle, and make the two restoration materials rub against each other, thereby simulating the normal oral chewing action, which can better restore the user's daily maximum wear action on the oral restoration materials, and facilitate the recording of accurate data.

[0041] Further Figure 2 , Figure 3 As shown, a protrusion 11 is fixedly connected to the lower inner wall of the transparent box 1 and a return groove 12 is provided, the return groove 12 is located outside the protrusion 11, and two support blocks 13 distributed front and back are fixedly connected to the left and right inner walls of the return groove 12, a grid 14 is supported inside the return groove 12 by four support blocks 13, and filter cotton 15 is laid on the upper part of the grid 14, a first connecting hole 16 communicating with the return groove 12 is provided on the lower left and right sides of the transparent box 1, and the two first connecting holes 16 are located at the lower parts of the four support blocks 13, and a second connecting hole 17 is provided on the upper left and right sides of the transparent box 1.

[0042] Through the above scheme: by arranging a meandering groove 12 on the lower side of the inside of the transparent box body 1, and arranging a grid 14 and filter cotton 15 in the meandering groove 12, when the device is in use, the liquid sprayed by the humidification structure 3 can filter the internal particulate matter through the filter cotton 15 when flowing to the bottom of the box, and the filtered liquid can be pumped back into the liquid tank 31 through the circulation pump 35 in the humidification structure 3 for continued use, which can reduce the cost of using the device.

[0043] Further Figure 1 , Figure 2 and Figure 6 As shown, the humidification structure 3 includes a liquid tank 31, which is fixedly connected to the transparent box body 1, a first connecting pipe 32 is fixedly connected to the lower part of the liquid tank 31, a one-way valve 38 is arranged on the first connecting pipe 32, the first connecting pipe 32 is fixedly connected to the first connecting hole 16 through insertion, and the one-way valve 38 is located outside the transparent box body 1, a discharge pipe 33 is fixedly connected to the lower part of the side of the liquid tank 31 away from the transparent box body 1, a filling port 34 is arranged on the upper front side of the liquid tank 31, a circulation pump 35 is fixedly connected to the middle part of the upper side of the liquid tank 31, a second connecting pipe 36 is fixedly connected to the output end of the circulation pump 35, the second connecting pipe 36 is fixedly connected to the nozzle 37 on the side away from the liquid tank 31, and the second connecting pipe 36 is fixedly connected to the second connecting hole 17 through insertion, and the nozzle 37 extends to one side of the fixed component 29.

[0044] Through the above scheme: by arranging humidifying structures 3 on both sides of the transparent box 1, when the device is used, the two humidifying structures 3 can moisten the space between the fixed components 29 in the two test structures 2, so that the oral restoration materials fixed in the fixed components 29 can simulate the real oral moist environment for testing, which can further improve the accuracy of the test.

[0045] An operating procedure for a wear resistance testing device for oral restoration materials, and instructions for use of the wear resistance testing device for oral restoration materials, characterized in that it includes at least the following steps:

[0046] Step 1, device debugging: First, according to the requirements of the test conditions, the fixing component 29 in the test structure 2 is replaced so that the fixing component 29 can clamp the test material and the test tool;

[0047] Step 2, installation of oral restoration materials: loosen the adjustment bolt 294 in the fixing assembly 29, place the test material between the two soft rubber pads 296, and subsequently tighten the two adjustment bolts 294 so that the two clamps 295 clamp the irregular test material through the soft rubber pads 296;

[0048] Step 3, material testing: start the two test structures 2, so that the motor 25 drives the turntable 26 to rotate, and the turntable 26 pushes the fixing rod 28 and the fixing assembly 29 to make reciprocating motion, so that the test materials fixed in the two test structures 2 rub against each other, and at the same time, the humidification structures 3 arranged on both sides of the transparent box 1 spray water to the test materials in the two tests at the same time, so as to simulate the internal environment of the oral cavity;

[0049] Step 4, liquid recovery: The liquid sprayed by the humidification structure 3 can wash away the debris generated by the friction of the test material. At the same time, the liquid containing the debris falls to the bottom of the box and is filtered by the filter cotton 15. The filtered liquid enters the zigzag groove 12 at the bottom of the transparent box 1, and can be subsequently pumped back to the liquid tank 31 through the circulation pump 35 in the humidification structure 3 for continued use.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A wear resistance testing device for oral restoration materials, comprising a transparent box (1), characterized in that: Two test structures (2) are fixedly connected to the upper side of the interior of the transparent box (1) and are distributed up and down and positioned opposite to each other; a humidification structure (3) is arranged on the left and right sides of the transparent box (1); a transparent box door (4) is movably connected to the right side of the front of the transparent box (1); a control panel (5) is fixedly installed on the upper part of the front side of the transparent box door (4); a handle (6) is fixedly connected to the left side of the front of the transparent box door (4); supporting feet (7) are fixedly connected to the four corners of the lower part of the transparent box (1); and a plurality of air holes (8) distributed in an array at equal distances are opened on the upper part of the transparent box (1); The test structure (2) comprises a fixed beam (21), a fixed seat (22) is fixedly connected to the middle of the rear side of the fixed beam (21), a motor (25) is fixedly connected to the upper side or the lower side of the fixed seat (22), a turntable (26) is fixedly connected to the output end of the motor (25), a groove (23) is provided in the middle of one side of the fixed beam (21) close to the turntable (26), a guide hole (24) slightly inclined to one side is provided in the inside of the groove (23) on the side away from the turntable (26), and the turntable (26) is provided with a plurality of guide holes (24) extending from the middle of the fixed beam (21) on the rear side. A connecting rod (27) is movably connected to one side of the front of the disk (26); a fixing rod (28) is movably connected to the side of the connecting rod (27) away from the turntable (26); a first threaded hole (281) is provided on the side of the fixing rod (28) away from the connecting rod (27); a fixing component (29) is threadedly connected inside the first threaded hole (281); the fixing rod (28) is slidably connected to the guide hole (24), and the fixing component (29) is located on the side of the fixed beam (21) away from the turntable (26).

2. The wear resistance testing device for oral restoration materials according to claim 1, characterized in that: The fixing assembly (29) comprises a C-shaped fixing buckle (291), a connecting head (292) being fixedly connected to a side of the C-shaped fixing buckle (291) close to the fixing rod (28), a second threaded hole (293) being provided on the left and right sides of the C-shaped fixing buckle (291), an adjusting bolt (294) being threadedly connected inside the two second threaded holes (293), a clamping plate (295) being movably connected to a side of the two adjusting bolts (294) close to each other, a soft rubber pad (296) being fixedly connected to a side of the two clamping plates (295) close to each other, the two clamping plates (295) and the two soft rubber pads (296) being located inside the C-shaped fixing buckle (291), and the connecting head (292) being threadedly connected to the first threaded hole (281).

3. The wear resistance testing device for oral restoration materials according to claim 1, characterized in that: The lower inner wall of the transparent box (1) is fixedly connected with a protrusion (11) and is provided with a circular groove (12), wherein the circular groove (12) is located outside the protrusion (11), and the left inner wall and the right inner part of the circular groove (12) are fixedly connected with two support blocks (13) distributed front and back.

4. The wear resistance testing device for oral restoration materials according to claim 3, characterized in that: A grid frame (14) is supported inside the circular groove (12) by four support blocks (13), and filter cotton (15) is laid on the upper part of the grid frame (14). The lower left and right parts of the transparent box body (1) are both provided with first connection holes (16) communicating with the circular groove (12), and the two first connection holes (16) are both located at the lower parts of the four support blocks (13). The upper left and right parts of the transparent box body (1) are both provided with second connection holes (17).

5. The wear resistance testing device for oral restoration materials according to claim 1, characterized in that: The humidifying structure (3) comprises a liquid tank (31), the liquid tank (31) being fixedly connected to the transparent box body (1), a first connecting pipe (32) being fixedly connected to the lower part of the liquid tank (31), a one-way valve (38) being provided on the first connecting pipe (32), the first connecting pipe (32) being inserted and fixedly connected to the first connecting hole (16), and the one-way valve (38) being located outside the transparent box body (1), and a discharge pipe (33) being fixedly connected to the lower part of a side of the liquid tank (31) away from the transparent box body (1).

6. The wear resistance testing device for oral restoration materials according to claim 5, characterized in that: A filling port (34) is provided on the front side of the upper part of the liquid tank (31); a circulating pump (35) is fixedly connected to the middle part of the upper side of the liquid tank (31); a second connecting pipe (36) is fixedly connected to the output end of the circulating pump (35); a side of the second connecting pipe (36) away from the liquid tank (31) is fixedly connected to a nozzle (37); the second connecting pipe (36) is fixedly connected to the second connecting hole (17) by insertion; and the nozzle (37) extends to one side of the fixed component (29).

7. The operating procedure of the wear resistance testing device for oral restoration materials according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1, device debugging: First, according to the requirements of the test conditions, the fixing component (29) in the test structure (2) is replaced so that the fixing component (29) can clamp the test material and the test tool; Step 2, installation of oral restoration materials: loosen the adjustment bolt (294) in the fixing assembly (29), place the test material between the two soft rubber pads (296), and subsequently tighten the two adjustment bolts (294) so ​​that the two clamps (295) clamp the irregular test material through the soft rubber pads (296); Step 3, material testing: start the two test structures (2), so that the motor (25) drives the turntable (26) to rotate, and the turntable (26) pushes the fixing rod (28) and the fixing assembly (29) to make reciprocating motion, so that the test materials fixed in the two test structures (2) rub against each other, and at the same time, the humidification structures (3) arranged on both sides of the transparent box (1) spray water to the test materials in the two tests at the same time, so as to simulate the internal environment of the oral cavity; Step 4, liquid recovery: The liquid sprayed by the humidifying structure (3) can wash away the debris generated by the friction of the test material. At the same time, the liquid containing the debris falls to the bottom of the box and is filtered by the filter cotton (15). The filtered liquid enters the inner part of the zigzag groove (12) at the bottom of the transparent box (1), and can be subsequently pumped back to the liquid tank (31) through the circulation pump (35) in the humidifying structure (3) for continued use.

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