Bite force meter cover

Abstract

This bite pressure meter is provided with a pressure sensor. A cover (20) is applied to the bite pressure meter. The cover (20) is provided with a bag-shaped cover body (30) for covering the pressure sensor. The cover (20) is provided with an elastic body (60) attached to an outer surface of the cover body (30). The Young's modulus of the material of the cover body (30) is greater than the Young's modulus of the material of the elastic body (60). The rubber hardness of the elastic body (60) is E15 or less.

Description

[Technical field]

[0001] The present disclosure relates to a cover for a bite force meter. [Background technology]

[0002] Patent Document 1 discloses a bite force meter that measures the bite force of upper and lower jaw teeth. The bite force meter is equipped with a pressure sensor. The bite force meter is used with the pressure sensor covered with a cover during measurement. The bite force meter detects the pressure when the pressure sensor is bitten by teeth as the bite force. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-66048 Summary of the Invention [Problem to be solved by the invention]

[0004] When using an occlusal force meter such as that disclosed in Patent Document 1, the pressure sensor may be covered with a cover. In this case, if the cover has a high hardness, the cover may damage the teeth when biting the pressure sensor. On the other hand, if the cover has a low hardness, a hole may be made in the cover when inserting the occlusal force meter into the cover, and saliva or the like from the oral cavity may get inside the cover. [Means for solving the problem]

[0005] In order to solve the above problems, one aspect of the present disclosure is a cover adapted to a bite force meter equipped with a pressure sensor, the cover comprising: a bag-shaped cover main body for covering the pressure sensor; When viewed from a direction perpendicular to the main surface of the pressure sensor in a state where the pressure sensor is applied to the bite force meter, The outer surface of the cover body In a position capable of covering the pressure sensor and an elastic body attached to the cover body, wherein the Young's modulus of the material of the cover body is greater than the Young's modulus of the material of the elastic body, and the rubber hardness of the elastic body is E15 or less.

[0006] According to the above configuration, the pressure sensor can be covered with the cover body and the elastic body. The rubber hardness of the elastic body is E15 or less, which is appropriately small. Therefore, when the pressure sensor is bitten during the measurement of the bite force, the elastic body acts as a buffer to reduce the impact on the teeth. In addition, the Young's modulus of the material of the cover body is greater than that of the material of the elastic body. Since the cover body has an appropriate hardness, the cover body is less likely to break. Effect of the Invention

[0007] According to one aspect of the present disclosure, damage to teeth caused by the cover for the bite force meter can be prevented while damage to the cover body can be suppressed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 13 is a perspective view of the bite force meter with a cover attached. [Diagram 2] Enlarged transparent view of the pressure sensor. [Diagram 3] FIG. [Figure 4] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the cover for a bite force meter will be described. First, a bite force meter to which the cover for a bite force meter of this embodiment is applied will be described. Note that the accompanying drawings may show components enlarged for ease of understanding. Also, the dimensional ratios of the components may differ from the actual ones or from those in other drawings.

[0010] <About the bite force meter> As shown in FIG. 1, the bite force meter 10 includes a handle 11, a pressure sensor 12, an arm 13, and a display 14.

[0011] The bite force meter 10 is rod-shaped overall. The handle 11 constitutes approximately one half of the bite force meter 10 in the longitudinal direction. The handle 11 is approximately rectangular parallelepiped-shaped. The handle 11 is held by a user when measuring bite force.

[0012] The arm 13 is connected to the other end face in the longitudinal direction of the handle 11. The arm 13 has a flattened rectangular column shape. The arm 13 extends in substantially the same direction as the handle 11. The arm 13 is thinner than the handle 11.

[0013] The pressure sensor 12 is connected to the end of the arm 13 opposite to the end connected to the handle 11 in the longitudinal direction. In other words, the pressure sensor 12 is located at the tip of the bite force meter 10. The pressure sensor 12 has a substantially rectangular parallelepiped shape.

[0014] As shown in FIG. 2, the pressure sensor 12 includes a pair of plate materials 12A, a first resin material 12B, and a pair of second resin materials 12C. The pair of plate materials 12A is made of a conductive metal. Each plate material 12A has a rectangular shape in a plan view. The main surfaces of the pair of plate materials 12A face each other. The pair of plate materials 12A are connected to wiring (not shown). The pair of plate materials 12A function as electrodes of a capacitor.

[0015] The first resin material 12B is located between the main surfaces of the pair of plate materials 12A. That is, the first resin material 12B fills the gap between the pair of plate materials 12A. The first resin material 12B is a plate material. In a plan view, the first resin material 12B has the same rectangular shape as the main surfaces of the plate material 12A. When viewed from a direction perpendicular to the main surfaces of the plate material 12A, the first resin material 12B overlaps the plate material 12A without protruding therefrom.

[0016] The second resin material 12C is located on the opposite side of the plate material 12A to the first resin material 12B. One second resin material 12C exists for each plate material 12A. That is, one second resin material 12C is located on the opposite side of the main surface of one plate material 12A. The other second resin material 12C is located on the opposite side of the main surface of the other plate material 12A. That is, the pair of second resin materials 12C sandwich the pair of plate materials 12A. Each second resin material 12C is substantially rectangular parallelepiped-shaped.

[0017] 1, the display 14 is located inside the handle 11. The display surface of the display 14 is exposed to the outside of the handle 11. The display 14 displays information such as the pressure detected by the pressure sensor 12.

[0018] <About the cover> As shown in FIG. 1, the cover for the bite force meter (hereinafter simply referred to as the cover 20) is a cover for covering the pressure sensor 12 and the arm 13 of the bite force meter .

[0019] As shown in FIG. 3, the cover 20 includes a bag-shaped cover body 30 for covering the pressure sensor 12 and an elastic body 60 attached to the outer surface of the cover body 30. The cover body 30 has a first sheet 40 and a second sheet 50 facing the first sheet 40. The first sheet 40 is substantially rectangular. In the following description, the first sheet 40 is assumed to be planar unless otherwise specified. When the first sheet 40 is planar, an axis perpendicular to the first sheet 40 is defined as a first axis X. An axis perpendicular to the first axis X and along which the long side of the first sheet 40 extends is defined as a second axis Y. An axis perpendicular to both the first axis X and the second axis Y is defined as a third axis Z. Of the two directions along the first axis X, one is defined as a first positive direction X1, and the opposite direction of the first positive direction X1 is defined as a first negative direction X2. Of the two directions along the second axis Y, one is defined as a second positive direction Y1, and the opposite direction of the second positive direction Y1 is defined as a second negative direction Y2. Moreover, one of the two directions along the third axis Z is defined as a third positive direction Z1, and the direction opposite to the third positive direction Z1 is defined as a third negative direction Z2.

[0020] 3, the edge 41 of the first sheet 40 in the second positive direction Y1 extends linearly. In addition, both corners of the first sheet 40 in the second positive direction Y1 are right angles. On the other hand, both corners of the first sheet 40 in the second negative direction Y2 are rounded. The material of the first sheet 40 is a synthetic resin, such as PET (polyethylene terephthalate).

[0021] The second sheet 50 is located on the first positive direction X1 side as viewed from the first sheet 40. The second sheet 50 has an elongated shape along the second axis Y as a whole. As shown in FIG. 4, the second sheet 50 has a base 55, a protruding portion 56, two slits 58, and a turn-up portion 59. The base 55 is substantially rectangular. The dimension of the base 55 along the second axis Y is the same as the dimension of the first sheet 40 along the second axis Y. The dimension of the base 55 along the third axis Z is the same as the dimension of the first sheet 40 along the third axis Z. In addition, both corners of the base 55 in the second negative direction Y2 are rounded, similar to the first sheet 40. In other words, the base 55 has substantially the same shape as the first sheet 40, except for the presence of the slit 58 and the turn-up portion 59 described later.

[0022] The base 55 of the second sheet 50 overlaps the first sheet 40. In the overlapping state with the first sheet 40, the outer edge of the base 55 coincides with the outer edge of the first sheet 40. The base 55 of the second sheet 50 and the first sheet 40 are joined to each other at the edge in the second negative direction Y2, the edge in the third positive direction Z1, and the edge in the third negative direction Z2 of the third axis Z. That is, the cover body 30 is a flat bag without a gusset in which a part of the periphery of the first sheet 40 and a part of the periphery of the second sheet 50 are joined to each other. The edge 41 of the first sheet 40 constitutes a part of the opening edge of the cover body 30.

[0023] Each slit 58 extends from an edge of the base 55 on the second positive direction Y1 side. The direction in which each slit 58 extends coincides with the second axis Y. That is, the two slits 58 extend parallel to each other. The extension dimensions of the two slits 58 are the same. As described above, the outer edge of the base 55 coincides with the outer edge of the first sheet 40. Therefore, when the first sheet 40 and the second sheet 50 are planar, and viewed from above in the first positive direction X1, the slits 58 extending from the edge of the base 55 pass over the edge 41 of the first sheet 40.

[0024] The turned-up portion 59 is a region of the second sheet 50 that is sandwiched between two slits 58. The turned-up portion 59, including its edge in the third positive direction Z1 and its edge in the third negative direction Z2, is not entirely joined to the first sheet 40. In other words, the turned-up portion 59, including its both edges in the direction along the third axis Z, is not entirely joined to the first sheet 40.

[0025] The protruding portion 56 protrudes from the turned-up portion 59. In other words, the turned-up portion 59 is adjacent to the protruding portion 56 in the direction opposite to the protruding direction of the protruding portion 56. When viewed in a plan view from the first positive direction X1, the protruding portion 56 protrudes from the edge 41 of the first sheet 40 to the outside of the first sheet 40. Specifically, the protruding portion 56 protrudes in the second positive direction Y1 from the outer edge of the turned-up portion 59 in the second positive direction Y1. Therefore, the protruding portion 56 and the turned-up portion 59 are continuous with each other. The turned-up portion 59 can be separated from the first sheet 40 together with the protruding portion 56.

[0026] The dimension of the protrusion 56 along the third axis Z at the end on the second negative direction Y2 side is the same as the dimension of the turned-up portion 59 along the third axis Z. That is, among the dimensions of the protrusion 56 along the third axis Z, the dimension of the end on the second negative direction Y2 side is the same as the distance between the two slits 58. Moreover, the dimension of the protrusion 56 along the third axis Z gradually becomes longer as it approaches the second positive direction Y1.

[0027] Further, the protruding portion 56 has a through hole 57. The through hole 57 is located at a portion of the protruding portion 56 where the dimension along the third axis Z is large. That is, the through hole 57 is located near the end of the protruding portion 56 on the second positive direction Y1 side. The through hole 57 has a substantially rectangular shape in a plan view. The second sheet 50 is made of a synthetic resin, such as PET. In this embodiment, the first sheet 40 and the second sheet 50 are made of the same material, PET.

[0028] As shown in Fig. 3, two elastic bodies 60 are attached to the outer surface of the cover main body 30. Specifically, the elastic bodies 60 are attached to the outer surface of the first sheet 40 on the first negative direction X2 side and the outer surface of the second sheet 50 on the first positive direction X1 side. Both of the two elastic bodies 60 have a flattened rectangular parallelepiped shape. Moreover, both of the two elastic bodies 60 have the same shape.

[0029] 4, when viewed in a plane along the first axis X, each side of each elastic body 60 is parallel to the second axis Y or the third axis Z. The dimension of each elastic body 60 in the direction along the second axis Y is smaller than the dimension of the base 55 in the direction along the second axis Y. In addition, the dimension of each elastic body 60 in the direction along the third axis Z is larger than the dimension of the base 55 in the direction along the third axis Z.

[0030] Here, as shown in FIG. 4, when viewed in a plane along the first axis X, the shortest imaginary line segment VL is drawn from the elastic body 60 to the opening edge of the cover body 30. In this embodiment, the opening edge of the cover body 30 coincides with the edge 41 of the first sheet 40. Therefore, the imaginary line segment VL is a line segment that extends parallel to the second axis Y among the line segments that can be drawn from the edge 41 of the first sheet 40 to the elastic body 60. In addition, the entire region of the cover body 30 on the second negative direction Y2 side when viewed from the end of the elastic body 60 in the second positive direction Y1 is defined as the covering region R. At this time, each elastic body 60 covers the entire covering region R of the cover body 30.

[0031] Moreover, the length of the imaginary line segment VL is greater than the maximum dimension L of the elastic body 60 in the direction along the imaginary line segment VL. In other words, when viewed from the direction along the first axis X, the dimension of the cover main body 30 protruding from the elastic body 60 along the second axis Y is greater than the dimension of the elastic body 60 in the direction along the second axis Y.

[0032] The elastic body 60 has a foamed resin. In this embodiment, the entire elastic body 60 is made of foamed resin. Furthermore, inside the elastic body 60, which is made of foamed resin, there are continuous air bubbles that are connected to the outside of the elastic body 60. In other words, the air bubbles present inside the elastic body 60 are connected to each other, allowing fluid to penetrate from the outside of the elastic body 60 to the inside.

[0033] The material of the elastic body 60 is a polyolefin resin having olefins as main unit molecules. More specifically, the material of the elastic body 60 is polyethylene, ethylene-vinyl acetate copolymer, polypropylene, or the like.

[0034] The rubber hardness of the material of the elastic body 60 is E15 or less. In other words, the foaming rate of the elastic body 60 is adjusted so that the rubber hardness is E15 or less. The "rubber hardness" is, for example, a hardness measured with a type E durometer conforming to JIS K 6253. In addition, when comparing the Young's modulus of the material of the elastic body 60 with the Young's modulus of the material of the cover body 30, the Young's modulus of the material of the cover body 30 is greater than the Young's modulus of the material of the elastic body 60.

[0035] The outer surface of the cover body 30 is more hydrophobic than the elastic body 60. That is, the PET, which is the material of the first sheet 40 and the second sheet 50, is more hydrophobic than the polyolefin-based resin, which is the material of the elastic body 60. The comparison of hydrophobicity can be performed, for example, by the following test. That is, PET, which is the same material as the first sheet 40 and the second sheet 50, is molded into a film. Similarly, polyolefin-based resin, which is the same material as the elastic body 60, is molded into a film. Equal amounts of water droplets are dropped on these two test films. The larger the angle formed between the film and the outer surface of the water droplet, the greater the hydrophobicity.

[0036] As shown in FIG. 3, the cover 20 includes a protective sheet 70 on the opposite side of the cover body 30 as viewed from each elastic body 60. That is, the cover 20 includes two protective sheets 70. Each protective sheet 70 is removably joined to the cover body 30 and the elastic body 60. Each protective sheet 70 is substantially rectangular in shape with a large dimension along the second axis Y. The dimension of each protective sheet 70 in the direction along the second axis Y is larger than the dimension of the second sheet 50 including the protruding portion 56 in the direction along the second axis Y. The dimension of each protective sheet 70 in the direction along the third axis Z is slightly larger than the dimension of the second sheet 50 in the direction along the third axis Z. That is, the protective sheet 70 has a larger overall dimension than the cover body 30.

[0037] In each protective sheet 70, the surface facing the cover body 30 has adhesive strength to other sheets. In this embodiment, the entire surface of each protective sheet 70 facing the cover body 30 has adhesive strength. On the other hand, the surface of each protective sheet 70 opposite the cover body 30 does not have adhesive strength to other sheets. The adhesive strength of each protective sheet 70 is such that the protective sheet 70 can be peeled off with fingers without causing tears or the like to other sheets. Therefore, each protective sheet 70 is removably joined to the cover body 30 and the elastic body 60. The material of each protective sheet 70 is a synthetic resin, for example, PET. In this embodiment, the material of the protective sheet 70 is the same PET as the material of the first sheet 40.

[0038] <Operation of this embodiment> When attaching the cover 20 to the bite force meter 10, first, the cover 20 is positioned so that the first sheet 40 is located on the lower side. Then, the protruding portion 56 of the second sheet 50 is grasped and the protruding portion 56 is lifted upward. At this time, in conjunction with the movement of the protruding portion 56, the turned-up portion 59 of the second sheet 50 is also lifted upward. As the turned-up portion 59 is lifted upward, a part of the first sheet 40 that was overlapping under the turned-up portion 59 appears on the surface.

[0039] Furthermore, as the turn-up portion 59 is lifted upward, the second sheet 50 is also lifted upward as a whole. At this time, the first sheet 40 may also try to lift upward while overlapping the second sheet 50. However, the first sheet 40 is pulled downward by the adhesive force of the protective sheet 70 disposed below the first sheet 40. As a result, even if the second sheet 50 is lifted upward, the first sheet 40 is not pulled upward, and an opening occurs between the first sheet 40 and the second sheet 50, creating a space.

[0040] Next, the bite force meter 10 is inserted into the space between the first sheet 40 and the second sheet 50. At this time, the pressure sensor 12 is placed on the first sheet 40 exposed by lifting the turn-over portion 59, and the bite force meter 10 is inserted. Then, the bite force meter 10 is inserted until the tip of the bite force meter 10 is positioned at the end of the first sheet 40 and the second sheet 50 in the second negative direction Y2. In this state, when viewed from a direction perpendicular to the main surface of the pressure sensor 12, the pressure sensor 12 is covered by the elastic body 60. Also, as shown in FIG. 1, the entire pressure sensor 12 and the arm 13 are covered by the cover 20. Note that, before inserting the bite force meter 10 into the oral cavity, each protective sheet 70 is removed from the cover body 30 and the elastic body 60.

[0041] When measuring occlusal force, the occlusal force meter 10 with the cover 20 attached is inserted into the oral cavity. Then, the pressure sensor 12 is bitten with teeth from above the elastic body 60 and the cover body 30. Specifically, the pressure sensor 12 is bitten with teeth from a direction perpendicular to the main surface of the plate material 12A of the pressure sensor 12. The first resin material 12B of the pressure sensor 12 is deformed by the force. The deformation of the first resin material 12B changes the capacitance between the pair of plate materials 12A. The occlusal force meter 10 detects the change in capacitance of the pressure sensor 12 as a change in pressure, and outputs it to the display 14 as occlusal force.

[0042] <Effects of this embodiment> (1) In the above embodiment, the cover body 30 and the elastic body 60 cover the pressure sensor 12. The rubber hardness of the elastic body 60 is E15 or less, which is appropriately small. Therefore, when the pressure sensor 12 is bitten during the measurement of the bite force, the elastic body 60 acts as a buffer to reduce the impact on the teeth. In other words, damage to the teeth can be suppressed. In addition, the Young's modulus of the material of the cover body 30 is larger than the Young's modulus of the material of the elastic body 60. Since the cover body 30 has an appropriate hardness, the cover body 30 is less likely to be damaged. Therefore, it is possible to suppress the intrusion of saliva, etc. into the cover body 30 during the use of the bite force meter 10.

[0043] (2) In the above embodiment, the outer surface of the cover body 30 is more hydrophobic than the elastic body 60. Therefore, even if saliva gets on the cover body 30 when measuring the bite force, the cover body 30 repels the saliva, so that the saliva tends to remain on the elastic body 60.

[0044] (3) In the above embodiment, the elastic body 60 is entirely made of foamed resin. Furthermore, inside the elastic body 60, there are open air bubbles that connect to the outside of the elastic body 60. Therefore, when the cover 20 is inserted into the mouth, the elastic body 60 can absorb saliva. When the elastic body 60 absorbs saliva, the cover 20 becomes less likely to slip against the teeth when the pressure sensor 12 is bitten off from above the cover 20.

[0045] (4) In the above embodiment, the length of the virtual line segment VL is greater than the maximum dimension L of the elastic body 60 in the direction along the virtual line segment VL. That is, when viewed from the direction along the first axis X, the dimension of the cover body 30 protruding from the elastic body 60 along the second axis Y is greater than the dimension of the elastic body 60 in the direction along the second axis Y. According to the above dimensional relationship, even if saliva attached to the elastic body 60 reaches the cover body 30, a considerable distance is ensured for the saliva to reach the opening edge of the cover body 30. Therefore, saliva is less likely to reach the opening edge of the cover body 30, and the infiltration of saliva into the inside of the cover body 30 can be suppressed.

[0046] (5) In the above embodiment, the cover body 30 is a flat bag without a gusset in which a part of the periphery of the first sheet 40 and a part of the periphery of the second sheet 50 are joined to each other. Therefore, the cover body 30 can be produced without resin molding or the like, and can be produced efficiently. In addition, since the cover body 30 is a flat bag without a gusset, the cover 20 is not bulky when carried around.

[0047] (6) In the above embodiment, the elastic body 60 covers the entire covering region R of the cover body 30. In other words, the edge of the covering region R is not exposed from the elastic body 60. Therefore, when the bite force meter 10 is used, the edge of the covering region R can be prevented from touching the inside of the oral cavity, which can cause injury to the oral cavity.

[0048] (7) In the above embodiment, the second sheet 50 has a protruding portion 56. When viewed in a plan view along an axis perpendicular to the first sheet 40, the protruding portion 56 protrudes from the edge 41 of the first sheet 40 to the outside of the first sheet 40. Therefore, by lifting the protruding portion 56, the cover body 30 can be easily opened. In other words, the cover 20 can be easily attached to the bite force meter 10.

[0049] (8) In the above embodiment, the second sheet 50 has a turn-up portion 59. The entire turn-up portion 59 is not joined to the first sheet 40. As described above, when the protruding portion 56 is lifted, the turn-up portion 59 is lifted together with the protruding portion 56. The inner surface of the first sheet 40 is then exposed. By inserting the bite force meter 10 along the exposed inner surface of the first sheet 40, it is easy to insert the bite force meter 10 into the cover body 30.

[0050] (9) In the above embodiment, the area sandwiched between the two slits 58 is the turn-up portion 59. Therefore, the turn-up portion 59 can be realized by the simple method of forming the slits 58 in the second sheet 50. Therefore, providing the turn-up portion 59 to the existing cover body 30 does not require a significant design change.

[0051] (10) In the above embodiment, the protective sheet 70 is removably joined to the cover body 30 and the elastic body 60. The protective sheet 70 is peeled off from the cover body 30 and the elastic body 60 at the time of measurement. In other words, the protective sheet 70 can protect the cover body 30 and the elastic body 60 until the measurement, and dirt and the like are less likely to adhere to the cover body 30 and the elastic body 60.

[0052] (11) In the above embodiment, the protruding portion 56 has a through hole 57. The edge of this through hole 57 functions as a non-slip surface when the protruding portion 56 is lifted, making it easy to lift the protruding portion 56.

[0053] <Modifications of this embodiment> The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0054] In the above embodiment, the shape of the bite force meter 10 is not limited to the example of the above embodiment. For example, the handle 11 may have a protrusion protruding from the outer surface of the handle 11. The protrusion may be set at a position where the protrusion can be inserted into the through hole 57 of the second sheet 50 when the cover body 30 is attached to the bite force meter 10. In this example, the cover body 30 attached to the bite force meter 10 is unlikely to come off.

[0055] In the above embodiment, the configuration of the pressure sensor 12 is not limited to the example of the above embodiment. For example, the pressure sensor 12 may be of a diaphragm type that detects the pressure of the fluid by a pressure-sensitive element via a diaphragm, or a gauge type that uses a strain sensor.

[0056] In the above embodiment, the outer surface of the cover body 30 may be as hydrophobic as the elastic body 60, or may be less hydrophobic than the elastic body 60. In the above embodiment, the shape of the elastic body 60 is not limited to the example of the above embodiment. For example, it may be circular in a plan view. In addition, the entire elastic body 60 may be in the form of a cap that covers the end of the cover main body 30 in the second negative direction Y2 and is fitted onto the cover main body 30.

[0057] In the above embodiment, the elastic body 60 may be provided on at least one of the first sheet 40 and the second sheet 50 . In the above embodiment, the elastic body 60 does not have to be made of only foamed resin. For example, a resin film may be attached to the outer surface of the foamed resin. Also, as long as the rubber hardness of the elastic body 60 is E15 or less, it does not have to have foamed resin.

[0058] In the above embodiment, in the cover 20, the length of the imaginary line segment VL may be equal to or smaller than the maximum dimension L of the elastic body 60 in the same direction as the imaginary line segment VL. For example, if a separate sheet is provided at the end of the cover body 30 in the second positive direction Y1, saliva can be prevented from adhering to the pressure sensor 12 and the arm 13.

[0059] In the above embodiment, the shapes of the first sheet 40 and the second sheet 50 are not limited to the examples in the above embodiment. For example, the first sheet 40 and the second sheet 50 may be square or trapezoidal, or may be circular or elliptical. Moreover, one sheet may be larger in overall dimensions than the other sheet. Moreover, the first sheet 40 and the second sheet 50 may be folded to form the cover body 30 into a bag shape with a gusset.

[0060] In the above embodiment, the first sheet 40 and the second sheet 50 may have a plurality of openings. For example, the first sheet 40 and the second sheet 50 may be partially joined in the second negative direction Y2, the third positive direction Z1, and the third negative direction Z2, and the portions sandwiched by the joined portions may have a plurality of openings, as long as the sheet is bag-shaped overall.

[0061] In the above embodiment, as long as the first sheet 40 and the second sheet 50 are disposed opposite each other, the structure of the cover body 30 is not limited to the example of the above embodiment. For example, a single sheet may be folded in half, with the fold of the sheet as the boundary to form the first sheet 40 and the second sheet 50. In this case, for example, the edges of two of the unfolded sides of the single sheet folded in half are joined to form a bag-shaped cover body 30.

[0062] In the above embodiment, when viewed in a plan view along the first axis X, a part of the covering region R of the cover body 30 may protrude from the elastic body 60. In the above embodiment, both corners of the first sheet 40 and the second sheet 50 in the second negative direction Y2 are rounded, so that the inside of the oral cavity is unlikely to be damaged even if the corners of the cover body 30 come into contact with the inside of the oral cavity.

[0063] In the above embodiment, the shape of the protruding portion 56 of the second sheet 50 is not limited to the example in the above embodiment. In the above embodiment, the second sheet 50 does not have to have the protruding portion 56. For example, the shape of the second sheet 50 may be the same as the shape of the first sheet 40.

[0064] In the above embodiment, the extension dimensions of the two slits 58 do not have to be the same. In the above embodiment, the position and shape of the turned-up portion 59 may be changed as appropriate. For example, the second sheet 50 may not be provided with the slit 58, and the turned-up portion 59 may extend over the entire area along the third axis Z of the base 55. In this case, if the edge of the turned-up portion 59 in the direction along the third axis Z is not joined to the first sheet 40, the turned-up portion 59 can be peeled off from the first sheet 40 and lifted up. Furthermore, if the first sheet 40 and the second sheet 50 open well when the protruding portion 56 is lifted up, the turned-up portion 59 can be omitted.

[0065] In the above embodiment, when the first sheet 40 is in a planar state and viewed in a plane along the first axis X, the number of slits 58 may be one or may be three or more, so long as the slits 58 pass over the edge 41 of the first sheet 40. In this case, the area between two adjacent slits 58 can function as a turn-up portion 59.

[0066] In the above embodiment, the protective sheet 70 may have adhesive force only in a portion of the surface facing the cover body 30. In addition, the protective sheet 70 does not have to be bonded to the entire surface of the elastic body 60, and it is sufficient that the protective sheet 70 is bonded to at least a portion of the elastic body 60.

[0067] In the above embodiment, the shape of the protective sheet 70 may be changed as appropriate. The shape of the protective sheet 70 should be such that it can cover the portions of the cover body 30 and the elastic body 60 that come into contact with the pressure sensor 12 during measurement. Also, if the covers 20 can be stacked on top of each other until measurement, and the covers 20 can be hygienically supplemented, the protective sheet 70 may not be necessary. [Explanation of symbols]

[0068] 10. Bite force gauge 11…Handle 12...Pressure sensor 13…Arm 20…Cover 30…Cover body 40…1st sheet 50…Second sheet 56...Protrusion 58...Slit 59…Rolling section 60...Elastic body 70...Protection sheet L…Maximum dimension VL: Virtual line segment

Claims

1. A cover to be applied to a bite force meter equipped with a pressure sensor, A bag-shaped cover body for covering the pressure sensor; an elastic body attached to an outer surface of the cover body at a position capable of covering the pressure sensor when viewed from a direction perpendicular to a main surface of the pressure sensor in a state in which the elastic body is applied to the bite force meter; Equipped with The Young's modulus of the material of the cover body is greater than the Young's modulus of the material of the elastic body, The rubber hardness of the elastic body is E15 or less, The outer surface of the cover body is more hydrophobic than the elastic body. Cover for bite force meter.

2. The elastic body includes a foamed resin, The foamed resin has open cells that are connected to the outside of the elastic body. A cover for the bite force meter according to claim 1.

3. The cover body has a first sheet and a second sheet facing the first sheet, When the first sheet is in a planar state and viewed in a plane along an axis perpendicular to the first sheet, when the shortest imaginary line segment is drawn from the elastic body to the edge of the opening of the cover main body, the length of the imaginary line segment is greater than the maximum dimension of the elastic body in the same direction as the imaginary line segment. The cover for the bite force meter according to claim 1 or 2.

4. The cover body has a first sheet and a second sheet facing the first sheet, The cover body is a flat bag without a gusset, in which a part of the periphery of the first sheet and a part of the periphery of the second sheet are joined to each other. The cover for the bite force meter according to any one of claims 1 to 3.

5. The cover body has a first sheet and a second sheet facing the first sheet, When the first sheet is in a planar state and viewed in a plane along an axis perpendicular to the first sheet, the shortest imaginary line segment is drawn from the elastic body to the opening edge of the cover main body, and among the directions along the imaginary line segment, a direction toward the opening edge as viewed from the elastic body is defined as a positive direction, and a direction opposite to the positive direction is defined as a negative direction, In the plan view, the elastic body covers the entire area of ​​the cover main body on the negative side when viewed from the end of the elastic body on the positive side. The cover for the bite force meter according to any one of claims 1 to 4.

6. The cover body has a first sheet and a second sheet facing the first sheet, The second sheet has a protruding portion that protrudes from an opening edge of the first sheet to an outside of the first sheet when viewed in a plan view along an axis perpendicular to the first sheet in a state in which the first sheet is in a planar state. The cover for the bite force meter according to any one of claims 1 to 5.

7. the second sheet has a turn-up portion adjacent to the protruding portion in a direction opposite to a protruding direction of the protruding portion, When an axis that is along the second sheet and perpendicular to the protruding direction is defined as an orthogonal axis, the entirety of the turned-up portion, including both edges in a direction along the orthogonal axis, is not joined to the first sheet, and the turned-up portion and the protruding portion are separable from the first sheet. A cover for the bite force meter according to claim 6.

8. the second sheet has slits extending from an outer edge of the second sheet on both sides of the turned-up portion in a direction along the orthogonal axis, When the first sheet is in a planar state and viewed in a plane along an axis perpendicular to the first sheet, the slit passes above an opening edge of the first sheet. A cover for the bite force meter according to claim 7.

9. a protective sheet joined to the elastic body on the opposite side of the cover body, The protective sheet is removable from the elastic body. The cover for the bite force meter according to any one of claims 1 to 8.

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