Turnover device

Abstract

The utility model provides a turning-over device. The turning-over device comprises a main body, two first supporting plates, two first hollow-out handles and two second hollow-out handles, the main body comprises a bearing plate and a wrapping sheet; the first supporting plate is provided with a first plane part and a first cambered surface part; the first hollowed-out handle and the second hollowed-out handle are arranged on the two sides of the bearing plate respectively. During use, the wrapping piece close to the first cambered surface part is turned over towards the back of the bearing plate, so that the side edge, connected with the wrapping piece, of the bearing plate forms a stuffed side edge, a patient is turned over by a certain angle, the stuffed side edge is stuffed below the body of the patient, then the patient is turned over back and lies on the bearing plate, and the patient is wrapped by the two wrapping pieces; the first hollow handle and the second hollow handle are used for lifting the bearing plate and moving the bearing plate to a target position, and the first hollow handle is used for lifting the bearing plate, so that the patient turns over. When the turnover device is used, a patient with heavy weight can be turned over only by matching of two persons, assistance of multiple persons is not needed, and pulling injury to the skin of the patient cannot be caused.

Description

Technical Field

[0001] The utility model relates to the technical field of medical nursing equipment, in particular to a turning device. Background Art

[0002] Pressure ulcers, also known as pressure sores or bedsores, are localized tissue damage and necrosis caused by prolonged pressure on localized tissue, resulting in impaired blood circulation, persistent ischemia, hypoxia, and nutrient deficiency, leading to loss of normal skin function. Pressure ulcers can damage the skin, cause pain, and even lead to life-threatening sepsis, severely impacting patients' quality of life.

[0003] The occurrence of pressure ulcers is the result of the combined effects of decreased patient tissue tolerance and pressure. Pressure, friction, moisture, decreased motor function, sensory dysfunction, decreased capillary elasticity, decreased peripheral circulation function, and age are risk factors for the development of pressure ulcers. Long-term bedridden patients are at high risk of pressure ulcers due to illness or age, which leads to deterioration of physical functions, poor mobility, decreased immune function, malnutrition, etc. Intermittent pressure relief is the most effective method for preventing and treating pressure ulcers. The most important part of this is to turn bedridden patients over every 2 hours, and every hour if necessary, to avoid long-term pressure on local tissues. In addition, when turning the patient over, the patient's body needs to be lifted up and dragging, pulling, and tugging on the patient should be avoided to prevent abrasions on the patient's skin and further injury to the patient.

[0004] Clinically, due to long-term bed rest and deterioration of body functions, patients often find it difficult to actively cooperate with medical staff to turn the patient over. When medical staff turn the patient over, they need to turn the patient over first and then move the patient back to the original position. For patients who are unable to turn over independently, it is difficult for medical staff to operate alone when performing regular turning for them. In particular, it is easy to drag, pull, and tug during the process of moving the patient's body, causing damage to the patient's skin. Therefore, in order to reduce the dragging of the patient's body, in reality, multiple people often assist in turning the patient over. That is, after the patient's body is turned over, multiple people work together to move the patient back to the original position. However, the operation of multiple people assisting in turning the patient over not only increases manpower expenditure and leads to low efficiency of nursing work, but also for patients with heavier weight, it is still unavoidable to pull the patient, which can easily scratch the patient's skin and affect the patient's treatment effect.

[0005] Therefore, it is necessary to provide a turning device that is simple to operate, saves time and effort, and does not cause damage to the patient's skin. Utility Model Content

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the technical defects in the prior art that some patients are unable to actively cooperate with medical staff to turn over, which makes it difficult for medical staff to turn over alone, and is prone to dragging, pulling, and other actions, which can easily cause damage to the patient's skin. The method in which multiple medical staff work together to turn the patient over is likely to lead to an increase in manpower expenditure, and still cannot avoid the situation of pulling the patient, thereby causing abrasions on the patient's skin, and thus affecting the treatment effect. The present invention thus provides a turning device that is simple to operate, saves time and effort, and does not cause damage to the patient's skin.

[0007] To this end, the present invention provides a turning device, comprising:

[0008] The main body includes a hard load-bearing plate and soft wrapping sheets arranged on the left and right sides of the load-bearing plate; the two wrapping sheets are respectively provided with a first fixing structure and a second fixing structure on the side away from the load-bearing plate; when the two wrapping sheets are wrapped inwardly, the first fixing structure and the second fixing structure can be connected and fixed to each other;

[0009] There are two first support plates, which are arranged on the back of the load-bearing plate in a front-to-back manner; the first support plates are long strips, and are provided with a first flat surface portion with a flat bottom surface and a first curved surface portion with a curved bottom surface along the length direction;

[0010] Two first hollow handles are provided on one side of the load-bearing plate close to the first plane portion;

[0011] There are two second hollow handles, which are arranged on one side of the load-bearing plate close to the first curved surface portion.

[0012] Furthermore, the first fixing structure is a Velcro hook surface or Velcro loop surface provided on an inner side or an outer side of the wrapping sheet;

[0013] The second fixing structure is a Velcro loop surface or a Velcro hook surface provided on the outer side surface or the inner side surface of the other wrapping sheet.

[0014] Furthermore, it also includes: two second support plates, which are arranged on the back side of the load-bearing plate opposite to each other in the front and back, and are located between the two first support plates; the second support plate is long and has a second planar portion with a flat bottom surface and a second arcuate portion with an arcuate bottom surface along the length direction.

[0015] Furthermore, the two second support plates are symmetrically arranged relative to the center line of the load-bearing plate along the length direction.

[0016] Furthermore, it also includes: a turning frame, one end of which is rotatably connected to the two second support plates through a mounting structure, and the other end extends outward and protrudes from the load-bearing plate in an arc shape.

[0017] Furthermore, the mounting structure includes:

[0018] There are two mounting holes, which are respectively opened on the two second planar portions opposite to each other;

[0019] Bolts are installed in the two mounting holes;

[0020] a nut, threadedly connected to the screw end of the bolt passing through the mounting hole;

[0021] The mounting sleeve is arranged at one end of the turning frame. The length of the mounting sleeve is smaller than the distance between the inner side walls of the two second planar portions. The mounting sleeve can be rotatably mounted on the bolt between the two mounting holes.

[0022] Furthermore, the turning frame comprises:

[0023] There are two vertical rods, which are arranged front and back oppositely, and one end of the two vertical rods is fixedly connected to the mounting sleeve, and the other end extends toward the free end of the second planar portion and protrudes from the bearing plate;

[0024] The two ends of the horizontal rod are respectively fixedly connected to the other ends of the two vertical rods.

[0025] Furthermore, the other ends of the two vertical rods extend in an arc shape toward the inner side surface of the main body.

[0026] The technical solution provided by the utility model has the following advantages:

[0027] The turning over device of the present invention comprises a main body, a first support plate, a first hollow handle and a second hollow handle; wherein, the main body comprises a hard load-bearing plate and soft wrapping sheets relatively arranged on the left and right sides of the load-bearing plate; the two wrapping sheets are respectively provided with a first fixing structure and a second fixing structure on the side away from the load-bearing plate; when the two wrapping sheets are wrapped inwardly, the first fixing structure and the second fixing structure can be connected and fixed to each other; there are two first support plates, which are relatively arranged on the back side of the load-bearing plate front and back; the first support plate is long and strip-shaped, and is provided with a first flat surface portion with a flat bottom surface and a first curved surface portion with an curved bottom surface along the length direction; there are two first hollow handles, which are arranged on the side of the load-bearing plate close to the first flat surface portion; there are two second hollow handles, which are arranged on the side of the load-bearing plate close to the first curved surface portion.

[0028] The method of using the turning device of the present invention is to turn a patient from a supine position to a prone position as an example: first, fold the wrapping sheet close to the first arc surface side toward the back side of the load-bearing plate, so that the side connected to the load-bearing plate and the wrapping sheet faces outward to form a tucked-in side; then turn the patient's body over at a certain angle (for example, turn the patient from a supine position to a lateral position), and tuck the tucked-in side of the load-bearing plate under the patient; turn the patient's body back to restore the supine position, and the patient now lies flat on the front of the load-bearing plate; slightly lift the load-bearing plate upward from the tucked-in side position, and turn the folded wrapping sheet back from under the load-bearing plate; operate the two wrapping sheets to Fold the inner side so that the two wrapping sheets and the load-bearing board wrap the patient's body together, and then connect and fix the two wrapping sheets through the first fixing structure and the second fixing structure; grab the first hollow handle and the second hollow handle from both sides, lift the load-bearing board and move it to one side of the bed (or other suitable position for turning over); separate the first fixing structure and the second fixing structure, slightly lift the load-bearing board upward from the tucked-in side of the load-bearing board again, and fold the wrapping sheet on this side under the load-bearing board again; lift the load-bearing board upward through the first hollow handle to turn the patient toward the second hollow handle side, first to the lateral position, and then to the prone position.

[0029] In the turning device of the present invention, the hollow portions of the first hollow handle and the second hollow handle can be circular or elliptical, which is convenient for medical staff to grasp; the first support plate is in the shape of an elongated strip, and is provided with a first flat surface portion with a flat bottom surface and a first curved surface portion with a curved bottom surface along the length direction. When the side of the load-bearing plate close to the first flat surface portion is subjected to an upward (or obliquely upward) force, the entire load-bearing plate is more likely to turn over toward the side of the first curved surface portion. The two first hollow handles and the two second hollow handles can be used to conveniently move the load-bearing plate, and then move the patient who has rolled onto the load-bearing plate, without the need to pull the patient; when the load-bearing plate is lifted up by the two first hollow handles, the patient can be turned over more easily with the assistance of the first support plate; using the turning device of the present invention, only two people are needed to turn over a heavier patient, without the need for multiple people to assist, and without causing pulling injuries to the patient's skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the prior art or the specific embodiments of the present invention, the following briefly introduces the drawings used in the description of the prior art or the specific embodiments.

[0031] Figure 1 It is a schematic diagram of the overall structure of the turning device of the utility model.

[0032] Figure 2 yes Figure 1 Exploded diagram.

[0033] Figure 3 yes Figure 1 Another stereoscopic view of .

[0034] Figure 4 It is a schematic diagram of two wrapping sheets wrapped inwardly and connected and fixed to each other by a first fixing structure and a second fixing structure.

[0035] Figure numerals: 1. Main body; 11. Load-bearing plate; 12. Wrapping sheet; 121. First fixing structure; 122. Second fixing structure; 2. First support plate; 21. First plane portion; 22. First arc portion; 31. First hollow handle; 32. Second hollow handle; 4. Second support plate; 41. Second plane portion; 411. Mounting hole; 42. Second arc portion; 43. Bolt; 44. Nut; 5. Turning frame; 51. Mounting sleeve; 52. Vertical rod; 53. Horizontal rod; 54. Reinforcing rod. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand this solution, the following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts should fall within the scope of protection of this application.

[0037] It should be noted that the terms "first," "second," and the like in the claims and description of this application are used to distinguish similar objects, and are not used to describe a particular order or precedence. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to having a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain cases. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other unless there is a conflict.

[0039] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] This embodiment provides a turning device, such as Figure 1-4 As shown, it includes a main body 1, a first support plate 2, a first hollow handle 31 and a second hollow handle 32; wherein, the main body 1 includes a hard load-bearing plate 11 and soft wrapping sheets 12 relatively arranged on the left and right sides of the load-bearing plate 11; the two wrapping sheets 12 are respectively provided with a first fixing structure 121 and a second fixing structure 122 on the side away from the load-bearing plate 11; when the two wrapping sheets 12 are wrapped inwardly, the first fixing structure 121 and the second fixing structure 122 can be connected and fixed to each other; there are two first support plates 2, which are relatively arranged on the back side of the load-bearing plate 11 front and back; the first support plate 2 is long and has a first flat surface portion 21 with a flat bottom surface and a first curved surface portion 22 with an curved bottom surface along the length direction; there are two first hollow handles 31, which are arranged on the side of the load-bearing plate 11 close to the first flat surface portion 21; there are two second hollow handles 32, which are arranged on the side of the load-bearing plate 11 close to the first curved surface portion 22.

[0041] The turning device of this embodiment takes turning a patient from a supine position to a prone position as an example. When in use, first fold the wrapping sheet 12 on the side close to the first arc surface portion 22 toward the back side of the load-bearing plate 11, so that the side connected to the load-bearing plate 11 and the wrapping sheet 12 faces outward to form a tucked-in side; then turn the patient's body over to a certain angle (for example, turn the patient from a supine position to a lateral position), and tuck the tucked-in side of the load-bearing plate 11 under the patient; turn the patient's body back to restore the supine position, and the patient is now lying flat on the front of the load-bearing plate 11; slightly lift the load-bearing plate 11 upward from the tucked-in side position, and turn the folded wrapping sheet 12 back from under the load-bearing plate 11; operate the two wrapping sheets 12 to fold inward so that the two The wrapping sheets 12 and the load-bearing plate 11 together wrap the patient's body, and then the two wrapping sheets 12 are connected and fixed by the first fixing structure 121 and the second fixing structure 122; grab the first hollow handle 31 and the second hollow handle 32 from both sides, lift the load-bearing plate 11 and move it to one side of the bed (or other suitable position for turning over); separate the first fixing structure 121 and the second fixing structure 122, and slightly lift the load-bearing plate 11 upward from the tucked-in side of the load-bearing plate 11, and fold the wrapping sheet 12 on this side under the load-bearing plate again; lift the load-bearing plate 11 upward through the first hollow handle 31, so that the patient can turn over to the side of the second hollow handle 32, first to the lateral position, and then to the prone position.

[0042] When the load-bearing plate is lifted up using the two first hollow handles, the patient can be turned over more easily with the assistance of the first support plate; using the turning device of the present invention, only two people are needed to turn over a heavier patient, without the need for assistance from multiple people, and without causing pulling injuries to the patient's skin.

[0043] In the turning over device of this embodiment, the load-bearing plate 11 can be made of high-density polyethylene material, carbon fiber material or aluminum alloy material, and the wrapping sheet 12 can be made of polyester, genuine leather, synthetic leather, linen or rubber. The wrapping sheet 12 and the load-bearing plate 11 can be connected and fixed by adhesive bonding or ultrasonic welding; the hollow parts of the first hollow handle 31 and the second hollow handle 32 can be circular or elliptical, and the hollow parts can be half located on the load-bearing plate 11 and the other half located on the wrapping sheet 12, so as to facilitate the medical staff to grasp; the first support plate 2 is long and has a first plane portion 21 with a flat bottom surface and a first curved surface portion 22 with an curved bottom surface along the length direction of the first support plate 2. When the side of the load-bearing plate 11 close to the first plane portion 21 is subjected to an upward (or obliquely upward) force, the entire load-bearing plate 11 is more likely to flip toward the side of the first curved surface portion 22. The two first hollow handles 31 and the two second hollow handles 32 can be used to conveniently move the load-bearing plate 11, and then move the patient who has rolled onto the load-bearing plate 11, without pulling the patient. When the two first hollow handles 31 are used to lift the load-bearing plate 11, the patient can be turned over more easily with the assistance of the first support plate 2. Using the turning device of this embodiment, only two people are needed to cooperate to turn over a heavier patient, without the need for assistance from multiple people, and no pulling damage will be caused to the patient's skin.

[0044] The turning over device of this embodiment further comprises the following: the first fixing structure 121 is a Velcro hook surface or Velcro loop surface provided on the inner side or outer side of one of the wrapping sheets 12; the second fixing structure 122 is a Velcro loop surface or Velcro hook surface provided on the outer side or inner side of the other wrapping sheet 12.

[0045] In this embodiment, the two wrapping sheets 12 can be quickly fixed and removed by using Velcro.

[0046] The turning over device of this embodiment also includes two second support plates 4, which are arranged on the back side of the load-bearing plate 11 opposite to each other in the front and back directions, and are located between the two first support plates 2; the second support plates 4 are long strips, and are provided with a second flat surface portion 41 with a flat bottom surface and a second curved surface portion 42 with a curved bottom surface along the length direction.

[0047] In this embodiment, the second support plate 4 can further provide support for the load-bearing plate 11, so that the force on the bottom of the load-bearing plate 11 is more uniform.

[0048] In the turning device of this embodiment, further, the two second support plates 4 are symmetrically arranged relative to the center line of the load-bearing plate 11 along the length direction.

[0049] The turning device of this embodiment further includes a turning frame 5 , one end of which is rotatably connected to the two second support plates 4 through a mounting structure, and the other end of the turning frame 5 extends outward and protrudes from the load-bearing plate 11 in an arc shape.

[0050] In this embodiment, the turning frame 5 can provide a longer power arm, so that the load-bearing plate 11 can be lifted more labor-savingly. For some patients with heavier weight or some medical staff with less strength, the turning frame 5 can relatively easily complete the turning operation for the patient.

[0051] The turning device of this embodiment further comprises a mounting structure including a mounting hole 411, a bolt 43, a nut 44 and a mounting sleeve 51; there are two mounting holes 411, which are respectively opened on the two second planar portions 41 opposite to each other; the bolt 43 is passed through and installed in the two mounting holes 411; the nut 44 is threadedly connected to the screw end of the bolt 43 passing through the mounting hole 411; the mounting sleeve 51 is arranged at one end of the turning frame 5, and the length of the mounting sleeve 51 is less than the distance between the inner side walls of the two second planar portions 41, and the mounting sleeve 51 can be rotatably mounted on the bolt 43 between the two mounting holes 411.

[0052] The turning device of this embodiment further comprises a turning frame 5 comprising two vertical rods 52 and a horizontal rod 53. The vertical rods 52 are arranged in a front-to-rear manner, with one end of each of the vertical rods 52 fixedly connected to the mounting sleeve 51 and the other end extending toward the free end of the second planar portion 41 and protruding from the load-bearing plate 11. The ends of the horizontal rod 53 are fixedly connected to the other ends of the two vertical rods 52. Furthermore, a reinforcement rod 54 may be provided between the two vertical rods 52 to increase the strength of the turning frame 5.

[0053] In the turning device of this embodiment, further, the other ends of the two vertical rods 52 extend in an arc shape toward the inner side surface of the main body 1 respectively.

[0054] In this embodiment, the other ends of the two vertical rods 52 extend in an arc shape toward the inner side surface of the main body 1, so that the cross bar 53 can be away from the plane where the load-bearing plate 11 is located, making it easier for medical staff to grasp the cross bar 53.

[0055] The turning device of this embodiment works as follows:

[0056] Taking the example of turning the patient from supine position to prone position, when using, first fold the wrapping sheet 12 on the side close to the first arc surface 22 toward the back side of the load-bearing plate 11, so that the side connected to the load-bearing plate 11 and the wrapping sheet 12 faces outward to form a tucked-in side; then turn the patient's body over to a certain angle (for example, turn the patient from supine position to lateral position), and tuck the tucked-in side of the load-bearing plate 11 under the patient; turn the patient's body back to restore the supine position, at this time the patient lies flat on the front of the load-bearing plate 11; slightly lift the load-bearing plate 11 upward from the tucked-in side position of the load-bearing plate 11, and turn the folded wrapping sheet 12 back from under the load-bearing plate 11; operate the two wrapping sheets 12 to fold inward so that the two The wrapping sheet 12 and the load-bearing plate 11 together wrap the patient's body, and then the two wrapping sheets 12 are connected and fixed by the Velcro on the two wrapping sheets 12; grab the first hollow handle 31 and the second hollow handle 32 from both sides, lift the load-bearing plate 11 and move it to one side of the bed (or other position suitable for turning over); remove the Velcro on the two wrapping sheets 12, slightly lift the load-bearing plate 11 upward from the tucked-in side again, and fold the wrapping sheet 12 on this side under the load-bearing plate again; lift the load-bearing plate 11 upward through the first hollow handle 31 and / or the turning frame 5, so that the patient can be turned toward the side of the second hollow handle 32, first to the lateral position, and then to the prone position.

[0057] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of this innovative technical solution.

Claims

1. A turning device, characterized in that: include: The main body (1) comprises a hard load-bearing plate (11) and soft wrapping sheets (12) arranged on the left and right sides of the load-bearing plate (11); a first fixing structure (121) and a second fixing structure (122) are respectively provided on the side of the two wrapping sheets (12) away from the load-bearing plate (11); when the two wrapping sheets (12) are wrapped inwardly, the first fixing structure (121) and the second fixing structure (122) can be connected and fixed to each other; There are two first support plates (2), which are arranged on the back side of the load-bearing plate (11) in a front-to-back manner; the first support plates (2) are long strips, and are provided with a first flat surface portion (21) with a flat bottom surface and a first curved surface portion (22) with a curved bottom surface along the length direction; Two first hollow handles (31) are provided on one side of the load-bearing plate (11) close to the first plane portion (21); There are two second hollow handles (32) provided on one side of the load-bearing plate (11) close to the first arc surface (22).

2. The turning device according to claim 1, characterized in that: The first fixing structure (121) is a Velcro hook surface or Velcro loop surface provided on the inner side or outer side of one of the wrapping sheets (12); The second fixing structure (122) is a Velcro fleece surface or a Velcro hook surface provided on the outer side or inner side of another wrapping sheet (12).

3. The turning device according to claim 1, characterized in that: Also includes: There are two second support plates (4), which are arranged on the back side of the load-bearing plate (11) in a front-to-back manner and are located between the two first support plates (2); the second support plates (4) are long strip-shaped, and are provided with a second flat surface portion (41) with a flat bottom surface and a second curved surface portion (42) with a curved bottom surface along the length direction.

4. The turning device according to claim 3, characterized in that: The two second support plates (4) are symmetrically arranged relative to the center line of the load-bearing plate (11) along the length direction.

5. The turning device according to claim 3 or 4, characterized in that: Also includes: A turning frame (5) has one end rotatably connected to the two second support plates (4) via a mounting structure, and the other end extends outward and protrudes in an arc shape from the load-bearing plate (11).

6. The turning device according to claim 5, characterized in that: The mounting structure includes: There are two mounting holes (411), which are respectively opened on the two second plane portions (41) opposite to each other; Bolts (43) are installed in the two mounting holes (411); A nut (44) is threadedly connected to the screw end of the bolt (43) passing through the mounting hole (411); A mounting sleeve (51) is provided at one end of the turning frame (5); the length of the mounting sleeve (51) is less than the distance between the inner side walls of the two second planar portions (41); and the mounting sleeve (51) can be rotatably mounted on the bolt (43) between the two mounting holes (411).

7. The turning device according to claim 6, characterized in that: The turning frame (5) comprises: There are two vertical rods (52) arranged opposite to each other in the front and rear directions, one end of each of the vertical rods (52) is fixedly connected to the mounting sleeve (51), and the other end extends toward the free end of the second plane portion (41) and protrudes from the bearing plate (11); The two ends of the horizontal rod (53) are respectively fixedly connected to the other ends of the two vertical rods (52).

8. The turning device according to claim 7, characterized in that: The other ends of the two vertical rods (52) extend in an arc shape toward the inner side surface of the main body (1).

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