Force sensor

Abstract

The invention discloses a force sensor. The force sensor comprises two sheet bodies which are opposite to each other, two electrode layers which are respectively arranged on the inner sides of the two sheet bodies, an insulating elastic body which is clamped between the two electrode layers, a pressure measuring piece which is arranged on one of the sheet bodies, and a joint layer which is connected with the two sheet bodies and is positioned on the outer side of the insulating elastic body. The pressure measuring piece comprises a body and a protruding body which is connected with the body and is in a protruding shape. When the force sensor bears an external force through the protruding body of the pressure measuring piece, at least one sheet body is pressed by the body to elastically deform, so that the insulating elastic body is forced to generate elastic deformation, and the joint layer is enabled to generate elastic deformation. Therefore, through the elastic deformation of the joint layer, the insulating elastic body accurately absorbs the external force borne by the pressure measuring piece, so that the accuracy of the force sensor is effectively improved.

Description

Technical Field

[0001] The present invention relates to a sensor, and more particularly to a force sensor. Background Art

[0002] Existing force sensors are relatively mature products, which makes their structural configurations less likely to be further studied and improved. As a result, the accuracy of existing force sensors cannot be effectively improved. Therefore, the inventor believes that the above defects can be improved. After painstaking research and the application of scientific principles, the inventor finally proposes the present invention with a reasonable design that effectively improves the above defects. Summary of the Invention

[0003] An object of an embodiment of the present invention is to provide a force sensor that can effectively improve the possible defects of existing force sensors.

[0004] An embodiment of the present invention discloses a force sensor, which includes: a first sheet body having a first inner surface and a first outer surface located on opposite sides respectively; a second sheet body having a second inner surface and a second outer surface located on opposite sides respectively, and the second inner surface is spaced apart and faces the first inner surface along a thickness direction; two electrode layers respectively installed on the first inner surface and the second inner surface; an insulating elastic body clamped between the two electrode layers along the thickness direction; a pressure measuring member including: a body whose bottom edge is fixed to the second outer surface of the second sheet body; and a protruding body connected to the body and protruding; wherein, a projection space formed by the pressure measuring member projecting towards the first sheet body along the thickness direction covers at least a part of the insulating elastic body; and a bonding layer connecting the first inner surface of the first sheet body and the second inner surface of the second sheet body and located outside the insulating elastic body; wherein, when the force sensor uses the protruding body of the pressure measuring member to bear an external force, the second sheet body is elastically deformed by the pressure of the body, so as to force the insulating elastic body to produce elastic deformation and make the bonding layer produce elastic deformation.

[0005] Preferably, the first sheet body, the second sheet body and the bonding layer jointly enclose a deformation space, which is non-sealed and communicates with an external space.

[0006] Preferably, the protruding body is connected to the central part of the body, and the protruding body has a height in the thickness direction, which is not less than the thickness of the body.

[0007] Preferably, along a transverse direction perpendicular to the thickness direction, the pressure measuring member has a first outer diameter, and the protruding body has a second outer diameter, which is 15% to 25% of the first outer diameter.

[0008] Preferably, the insulating elastomer includes: an insulating layer disposed on one of the electrode layers; and a plurality of columns, one end of which is connected to the insulating layer and the other ends of the plurality of columns are connected to the other electrode layer; wherein the projection space covers the plurality of columns.

[0009] Preferably, in a transverse direction along the vertical thickness direction, the pressure measuring member has a first outer diameter, and there is a maximum distance between two columns away from each other, which is 95% to 105% of the first outer diameter.

[0010] Preferably, the first sheet includes: a first substrate having a first inner surface; and a first grounding layer disposed on the first substrate and having a first outer surface; wherein a first projection area formed by the two electrode layers and the insulating elastomer projecting orthogonally toward the first sheet in the thickness direction is completely located in the first grounding layer.

[0011] Preferably, the second sheet includes: a second substrate having a second inner surface; and a second grounding layer disposed on the second substrate and having a second outer surface, and the pressure measuring member is attached to the second grounding layer with its body; wherein a second projection area formed by the two electrode layers and the insulating elastomer projecting orthogonally toward the second sheet in the thickness direction is completely located in the second grounding layer.

[0012] Preferably, the projection space covers at least 50% of the area of the insulating elastomer.

[0013] An embodiment of the present invention also discloses a force sensor, which includes: a first sheet having a first inner surface and a first outer surface respectively located on opposite sides; a second sheet having a second inner surface and a second outer surface respectively located on opposite sides, and the second inner surface is spaced apart and faces the first inner surface along a thickness direction; two electrode layers respectively mounted on the first inner surface and the second inner surface; an insulating elastomer clamped between the two electrode layers along the thickness direction; a pressure measuring member including: a body, the bottom edge of which is fixed to the second outer surface of the second sheet; and a protruding body connected to the body and protruding; wherein a projection space formed by the pressure measuring member projecting orthogonally toward the first sheet in the thickness direction covers at least a part of the insulating elastomer; and a bonding layer including a support body, and a first bonding film and a second bonding film respectively connected to opposite sides of the support body; wherein the bonding layer is located outside the insulating elastomer, and the support body is connected to the first inner surface of the first sheet through the first bonding film and connected to the second inner surface of the second sheet through the second bonding film; wherein when the force sensor uses the protruding body of the pressure measuring member to bear an external force, the second sheet is elastically deformed by the pressure of the body, so as to force the insulating elastomer to generate elastic deformation, and at least one of the first bonding film and the second bonding film generates elastic deformation.

[0014] Preferably, at least one of the first bonding film and the second bonding film has a Shore hardness value covering 0 to 100 of Shore OOOS and 0 to 100 of Shore A.

[0015] Preferably, the first sheet, the second sheet, and the bonding layer jointly enclose a deformation space, which is non-sealed and communicates with an external space.

[0016] Preferably, the top edge of the protrusion is connected to the central part of the body, and the protrusion has a height in the thickness direction, which is not less than the thickness of the body.

[0017] Preferably, along a transverse direction perpendicular to the thickness direction, the pressure measuring member has a first outer diameter, and the protrusion has a second outer diameter, which is 15% to 25% of the first outer diameter.

[0018] Preferably, the insulating elastomer includes: an insulating layer disposed on one of the electrode layers; and a plurality of columns, one end of which is connected to the insulating layer, and the other ends of the plurality of columns are connected to the other electrode layer; wherein, the projection space covers the plurality of columns.

[0019] Preferably, along a transverse direction perpendicular to the thickness direction, the pressure measuring member has a first outer diameter, and there is a maximum distance between two columns away from each other, which is 95% to 105% of the first outer diameter.

[0020] Preferably, the force sensor further includes an adhering layer disposed on the first outer surface for adhering to an external object.

[0021] Preferably, the first sheet includes: a first substrate having a first inner surface; and a first grounding layer disposed on the first substrate and having a first outer surface; wherein, a first projection area formed by the two electrode layers and the insulating elastomer projecting orthogonally in the thickness direction towards the first sheet is completely located in the first grounding layer.

[0022] Preferably, the second sheet includes: a second substrate having a second inner surface; and a second grounding layer disposed on the second substrate and having a second outer surface, and the pressure measuring member is attached to the second grounding layer with the body; wherein, a second projection area formed by the two electrode layers and the insulating elastomer projecting orthogonally in the thickness direction towards the second sheet is completely located in the second grounding layer.

[0023] Preferably, the projection space covers at least 50% of the area of the insulating elastomer.

[0024] In summary, the force sensor disclosed in the embodiments of the present invention can lock the position bearing the external force with the protruding body provided on the pressure measuring member, and match the pressure measuring member with other components in terms of structural configuration, so that the force sensor can lock the position bearing the external force with the protruding body, and then accurately absorb the external force borne by the pressure measuring member through the elastic deformation of the bonding layer (or at least one of the first bonding film and the second bonding film), thereby effectively improving the accuracy of the force sensor.

[0025] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, these descriptions and drawings are only used to illustrate the present invention and do not impose any limitation on the protection scope of the present invention. Brief Description of the Drawings

[0026] Figure 1 It is a three-dimensional schematic diagram of the force sensor according to Embodiment 1 of the present invention.

[0027] Figure 2 It is Figure 1 A cross-sectional schematic diagram along the section line II-II.

[0028] Figure 3 It is Figure 2 A cross-sectional schematic diagram of the force sensor when bearing an external force.

[0029] Figure 4 It is a cross-sectional schematic diagram of the force sensor according to Embodiment 2 of the present invention.

[0030] Figure 5 It is a cross-sectional schematic diagram of the force sensor according to Embodiment 3 of the present invention.

[0031] Figure 6 It is Figure 5 A cross-sectional schematic diagram of the force sensor when bearing an external force.

[0032] Figure 7 It is a cross-sectional schematic diagram of another form of the force sensor according to Embodiment 3 of the present invention. Detailed Description of the Specific Embodiments

[0033] The following are specific embodiments to illustrate the implementation manners of the "force sensor" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple schematic illustration and are not drawn according to actual dimensions, which is stated in advance. The following embodiments will further detail the related technical content of the present invention, but the disclosed content is not intended to limit the protection scope of the present invention.

[0034] It should be understood that although terms such as "first", "second", "third", etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another, or one signal from another. In addition, the term "or" used herein should, depending on the actual situation, possibly include any one or a combination of more of the associated listed items.

[0035] [Embodiment 1]

[0036] Please refer to Figures 1 to 3 as shown, which is Embodiment 1 of the present invention. This embodiment discloses a force sensor 100, which includes a first sheet 1, a second sheet 2 spaced from the first sheet 1, two electrode layers 3 respectively mounted on the first sheet 1 and the second sheet 2, an insulating elastic body 4 clamped between the two electrode layers 3, a pressure measuring member 5 disposed on the second sheet 2, a bonding layer 6 connecting the first sheet 1 and the second sheet 2, and an adhering layer 7 disposed on the first sheet 1, but the present invention is not limited thereto. Specifically, the pressure measuring member 5 is located on the side of the second sheet 2 away from the two electrode layers 3, and the adhering layer 7 is located on the side of the first sheet 1 away from the two electrode layers 3.

[0037] The first sheet 1 and the second sheet 2 are each flat in this embodiment, and the first sheet 1 and the second sheet 2 adopt a flexible structure with the same outer shape, and their outer contours are flush with each other along a thickness direction H, but the present invention is not limited thereto. For example, in other embodiments not shown in the present invention, the outer shapes of the first sheet 1 and the second sheet 2 may be slightly different; or, the second sheet 2 has flexibility, but the first sheet 1 does not have flexibility; or, any one of the first sheet 1 and the second sheet 2 is flat in the part adjacent to the two electrode layers 3, while the remaining parts of any one of the first sheet 1 and the second sheet 2 are non-flat.

[0038] In this embodiment, the first sheet body 1 has a first inner surface 11 and a first outer surface 12 located on opposite sides respectively, and the second sheet body 2 has a second inner surface 21 and a second outer surface 22 located on opposite sides respectively. Among them, the second inner surface 21 is spaced apart from and faces the first inner surface 11 along the thickness direction H, and the edge of the second inner surface 21 is preferably flush with the edge of the first inner surface 11 along the thickness direction H.

[0039] The two electrode layers 3 are respectively mounted on the first inner surface 11 of the first sheet body 1 and the second inner surface 21 of the second sheet body 2, and the two electrode layers 3 are preferably respectively mounted on the substantially central portions of the first inner surface 11 and the second inner surface 21. In this embodiment, the two electrode layers 3 have the same outer shape, and their outer contours are flush with each other along the thickness direction H, but the present invention is not limited thereto.

[0040] Furthermore, the insulating elastic body 4 is clamped between the two electrode layers 3 along the thickness direction H. Among them, the outer contour of the insulating elastic body 4 is preferably adjacent to the outer contour of any one of the electrode layers 3, and the specific structure of the insulating elastic body 4 can be adjusted and changed according to design requirements. For the purpose of facilitating the understanding of the operation of the force sensor 100 in this embodiment, one of the preferred structures of the insulating elastic body 4 is described below, but the present invention is not limited thereto.

[0041] More specifically, the insulating elastic body 4 includes an insulating layer 41 and a plurality of columns 42 connected to the insulating layer 41. Among them, the insulating layer 41 is disposed on one of the electrode layers 3 (for example, the electrode layer 3 mounted on the first sheet body 1), one end of each column 42 is connected to the insulating layer 41, and the other end of each column 42 is connected to the other electrode layer 3 (for example, the electrode layer 3 mounted on the second sheet body 2).

[0042] The pressure measuring member 5 in this embodiment is made of a hard material that is not easily deformed (such as: metal or hard plastic). For example: when the pressure measuring member 5 and the second sheet 2 are under the same pressure or force, the degree of deformation of the pressure measuring member 5 is less than that of the second sheet 2. The pressure measuring member 5 includes a main body 51 and a protruding body 52 connected to the main body 51. Among them, the main body 51 is flat and can be circular, and the bottom edge of the main body 51 is fixed (such as: adhered with an adhesive layer G) to the second outer surface 22 of the second sheet 2. Furthermore, the protruding body 52 is in a protruding shape and is preferably connected to the central part of the main body 51, and the protruding body 52 has a height H52 in the thickness direction H, which is not less than the thickness H51 of the main body 51, but the present invention is not limited to the above. In addition, the area of the part connected to the second outer surface 22 of the pressure measuring member 5 is less than a predetermined proportion (such as: 25%) of the area of the second outer surface 22.

[0043] Further, along a transverse direction D perpendicular to the thickness direction H, the pressure measuring member 5 (or the main body 51) has a first outer diameter D1, and the protruding body 52 has a second outer diameter D2, which is 15% - 25% of the first outer diameter D1. Furthermore, there is a maximum distance D42 (such as: Figure 2 ) between two of the columns 42 that are far away from each other, which can be 95% - 105% of the first outer diameter D1, but the present invention is not limited to the above. It should be noted that although the transverse direction D is presented as a single direction in the drawings, the transverse direction D in this embodiment can be any direction perpendicular to the thickness direction H.

[0044] It should be noted that the structure of the pressure measuring member 5 can be adjusted and changed according to design requirements and is not limited to this embodiment. For example, in other embodiments not shown in the present invention, the pressure measuring member 5 is generally in the shape of a truncated cone (such as: the lower half of the pressure measuring member 5 is the main body 51, and the upper half of the pressure measuring member 5 is the protruding body 52), the circumferential side surface of the pressure measuring member 5 is an inclined side surface, and the cross-section of the pressure measuring member 5 perpendicular to the thickness direction H is tapered along the direction from the main body 51 to the protruding body 52; or, the main body 51 is flat, the protruding body 52 is connected to the central part of the main body 51, and the area of the central part of the main body 51 is less than a predetermined proportion (such as: 25%) of the area of the main body 51.

[0045] In addition, a projection space formed by the pressure testing member 5 projecting orthogonally towards the first sheet body 1 along the thickness direction H covers at least 50% of the area of the insulating elastic body 4. In this embodiment, preferably, the projection space covers the entire insulating elastic body 4 (such as: the insulating layer 41 and the plurality of columns 42); that is to say, the plurality of columns 42 may be evenly distributed in the projection space, so as to facilitate the complete absorption of the force borne by the pressure testing member 5 and improve the sensitivity of the force sensor 100.

[0046] It should be additionally noted that the pressure testing member 5 is described as having a one-piece structure formed integrally in this embodiment (such as: the protruding body 52 is formed by stamping the body 51), but the present invention is not limited thereto. For example, in other embodiments not shown in the present invention, the protruding body 52 may also be connected to the body 51 by subsequent processing methods (such as: adhesion, welding, or snap connection).

[0047] The bonding layer 6 connects the first inner surface 11 of the first sheet body 1 and the second inner surface 21 of the second sheet body 2 and is located outside (or around) the insulating elastic body 4 (such as: the area where the bonding layer 6 is distributed should be sufficient to support the first sheet body 1 and the second sheet body 2, so as to maintain the first sheet body 1 and the second sheet body 2 spaced apart from each other). Among them, the bonding layer 6 is made of a material that can produce elastic deformation, such as: pressure sensitive adhesives (PSA). For example, the Shore hardness value of the bonding layer 6 covers 0 to 100 of Shore OOO S and 0 to 100 of Shore A, but the present invention is not limited thereto. Furthermore, in this embodiment, the Shore hardness value of the bonding layer 6 is less than the Shore hardness value of the second sheet body 2, and the Shore hardness value of the second sheet body 2 is less than or equal to the Shore hardness value of the pressure testing member 5.

[0048] Furthermore, a deformation space S is jointly formed by the first sheet body 1, the second sheet body 2, and the bonding layer 6, which is non-sealed and communicates with an external space (through at least one opening S1). Further, through at least one opening S1, the force sensor 100 can prevent the deformation space S from forming a closed space that causes incorrect transmission of the pressure value due to internal air pressure. Accordingly, when the force sensor 100 bears an external force F with the protruding body 52 of the pressure testing member 5, the second sheet body 2 is elastically deformed by the pressure of the body 51, so as to force the insulating elastic body 4 to produce elastic deformation and cause the bonding layer 6 to produce elastic deformation.

[0049] As described above, in this embodiment, the force sensor 100 can be configured such that the protruding body 52 is provided on the pressure measuring member 5, and the pressure measuring member 5 is configured to cooperate with other components in terms of structure, so that the force sensor 100 can accurately bear the external force F at the position of the protruding body 52. Then, through the elastic deformation of the bonding layer 6, the insulating elastic body 4 can completely absorb the external force F borne by the pressure measuring member 5, thereby effectively improving the accuracy of the force sensor 100.

[0050] In addition, for the convenience of using the force sensor 100, the bonding layer 7 is disposed on the first outer surface 12 of the first sheet 1 for adhering to an external object (not shown in the figure), but the present invention is not limited thereto.

[0051] [Embodiment 2]

[0052] Please refer to Figure 4 shown, which is Embodiment 2 of the present invention. Since this embodiment is similar to the above Embodiment 1, the same parts of the two embodiments will not be described in detail (such as: the electrode layer 3, the insulating elastic body 4, the pressure measuring member 5, the bonding layer 6, and the bonding layer 7). The differences between this embodiment and the above Embodiment 1 are generally described as follows:

[0053] In this embodiment, the first sheet 1 includes a first substrate 13 and a first grounding layer 14 disposed on the first substrate 13. Among them, the first substrate 13 has the first inner surface 11 of the first sheet 1, and the first grounding layer 14 has the first outer surface 12 of the first sheet 1, and the bonding layer 7 is disposed on the first grounding layer 14. Furthermore, a first projection area formed by the two electrode layers 3 and the insulating elastic body 4 projected onto the first sheet 1 along the thickness direction H is completely located above the first grounding layer 14.

[0054] The second sheet 2 includes a second substrate 23 and a second grounding layer 24 disposed on the second substrate 23. Among them, the second substrate 23 has the second inner surface 21 of the second sheet 2, and the second grounding layer 24 has the second outer surface 22 of the second sheet 2, and the pressure measuring member 5 is attached to the second grounding layer 24 with the body 51. Furthermore, a second projection area formed by the two electrode layers 3 and the insulating elastic body 4 projected onto the second sheet 2 along the thickness direction H is completely located above the second grounding layer 24.

[0055] As described above, in this embodiment, the force sensor 100 can, through the configuration of the first ground layer 14 and the second ground layer 24, enable the operation between the two electrode layers 3 to effectively avoid external interference, thereby effectively improving the accuracy of the force sensor 100. In addition, in other embodiments not shown in the present invention, the force sensor 100 may also be configured with only one of the first ground layer 14 and the second ground layer 24.

[0056] [Embodiment III]

[0057] Please refer to Figures 5 to 7 as shown, which is Embodiment III of the present invention. Since this embodiment is similar to the above-mentioned Embodiment I and Embodiment II, the similarities of the above-mentioned multiple embodiments will not be elaborated again (such as: the first sheet body 1, the second sheet body 2, the electrode layer 3, the insulating elastic body 4, the pressure measuring member 5, and the bonding layer 7), and the differences between this embodiment and the above-mentioned Embodiment I and Embodiment II are generally described as follows:

[0058] In this embodiment, the bonding layer 6 connects the first inner surface 11 of the first sheet body 1 and the second inner surface 21 of the second sheet body 2 and is located (or surrounds) the outside of the insulating elastic body 4 (such as: the area where the bonding layer 6 is distributed needs to be sufficient to support the first sheet body 1 and the second sheet body 2, so as to maintain the first sheet body 1 and the second sheet body 2 spaced apart from each other). Among them, the bonding layer 6 includes a support body 63 and a first bonding film 61 and a second bonding film 62 respectively connected to opposite sides of the support body 63.

[0059] Furthermore, the support body 63 is made of a hard material that is not easily deformed (such as: metal or hard plastic) in this embodiment, and the thickness H63 of the support body 63 along the thickness direction H is preferably 40% - 80% of the thickness H6 of the bonding layer 6 (such as: the thickness H63 of the support body 63 is preferably greater than the thickness of the first bonding film 61 and also greater than the thickness of the second bonding film 62), but the present invention is not limited thereto.

[0060] Furthermore, in this embodiment, the first bonding film 61 and the second bonding film 62 are each made of a material capable of elastic deformation, such as a pressure-sensitive adhesive. For example, the first bonding film 61 and the second bonding film 62 each have a Shore hardness value covering 0 to 100 of Shore OOOS and 0 to 100 of Shore A. However, the first bonding film 61 and the second bonding film 62 may also be designed such that only one of them is made of a material capable of elastic deformation; that is, at least one of the first bonding film 61 and the second bonding film 62 has the Shore hardness value covering 0 to 100 of Shore OOOS and 0 to 100 of Shore A.

[0061] More specifically, the support 63 is connected to the first inner surface 11 of the first sheet 1 through the first bonding film 61 and is connected to the second inner surface 21 of the second sheet 2 through the second bonding film 62. Furthermore, the first sheet 1, the second sheet 2, and the bonding layer 6 together enclose a deformation space S, which is non-sealed and communicates with an external space.

[0062] Accordingly, when the force sensor 100 uses the protrusion 52 of the pressure measuring member 5 to bear an external force F, the second sheet 2 is elastically deformed under the pressure of the main body 51, so as to force the insulating elastic body 4 to elastically deform, and at least one of the first bonding film 61 and the second bonding film 62 elastically deforms.

[0063] [Technical Effects of Embodiments of the Present Invention]

[0064] In summary, the force sensor disclosed in the embodiments of the present invention can lock the position bearing the external force with the protrusion by providing the protrusion on the pressure measuring member and matching the pressure measuring member with other components in terms of structural configuration, and then accurately absorb the external force borne by the pressure measuring member through the elastic deformation of the bonding layer (or at least one of the first bonding film and the second bonding film), so as to effectively improve the accuracy of the force sensor.

[0065] Furthermore, the force sensor disclosed in the embodiments of the present invention can effectively avoid external interference in the operation between the two electrode layers through the configuration of the first grounding layer and / or the second grounding layer, and thus effectively improve the accuracy of the force sensor.

[0066] The above-disclosed content is only a preferred and feasible embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the content of the specification and drawings of the present invention are included in the patent scope of the present invention.

Claims

1. A force sensor, characterized in that: The force sensor comprises: A first sheet having a first inner surface and a first outer surface located at opposite sides respectively; A second sheet body having a second inner surface and a second outer surface located at opposite sides, and the second inner surface is spaced apart along a thickness direction and faces the first inner surface; Two electrode layers, respectively mounted on the first inner surface and the second inner surface; an insulating elastic body, sandwiched between the two electrode layers along the thickness direction; A pressure test piece, comprising: a main body, a bottom edge of which is fixed to the second outer surface of the second sheet; and a protrusion connected to the main body and in a protruding shape; wherein a projection space formed by the positive projection of the pressure-testing member along the thickness direction toward the first sheet body covers at least a portion of the insulating elastic body; and a bonding layer, connecting the first inner surface of the first sheet and the second inner surface of the second sheet, and located outside the insulating elastic body; When the force sensor is subjected to an external force by the protrusion of the pressure-testing piece, the second sheet is elastically deformed by the pressure of the main body, so as to force the insulating elastomer to produce elastic deformation and the bonding layer to produce elastic deformation.

2. The force sensor according to claim 1, characterized in that: The first sheet body, the second sheet body and the bonding layer together surround and form a deformation space, which is non-sealed and communicates with an external space.

3. The force sensor according to claim 1, characterized in that: The protrusion is connected to the central part of the main body, and the protrusion has a height in the thickness direction, which is not less than the thickness of the main body.

4. The force sensor according to claim 1, characterized in that: Along a transverse direction perpendicular to the thickness direction, the pressure-testing member has a first outer diameter, and the protrusion has a second outer diameter, which is 15% to 25% of the first outer diameter.

5. The force sensor according to claim 1, characterized in that: The insulating elastomer comprises: an insulating layer disposed on one of the electrode layers; and A plurality of columns, one end of which is connected to the insulating layer, and the other end of which is connected to another of the electrode layers; wherein the projection space covers the plurality of columns.

6. The force sensor according to claim 5, characterized in that: Along a transverse direction perpendicular to the thickness direction, the pressure-testing member has a first outer diameter, and there is a maximum distance between two columns that are far away from each other, which is 95% to 105% of the first outer diameter.

7. The force sensor according to claim 1, characterized in that: The first sheet body comprises: a first substrate having the first inner surface; and a first grounding layer, disposed on the first substrate and having the first outer surface; A first projection area formed by orthographically projecting the two electrode layers and the insulating elastic body along the thickness direction toward the first sheet is completely located in the first ground layer.

8. The force sensor according to claim 7, characterized in that: The second sheet body comprises: a second substrate having the second inner surface; and a second grounding layer, disposed on the second substrate and having the second outer surface, and the pressure-testing member is attached to the second grounding layer with the body; A second projection area formed by orthographically projecting the two electrode layers and the insulating elastic body toward the second sheet along the thickness direction is completely located in the second ground layer.

9. The force sensor according to claim 1, characterized in that: The projected space covers at least 50% of the area of ​​the insulating elastomer.

10. A force sensor, characterized in that: The force sensor comprises: A first sheet having a first inner surface and a first outer surface located at opposite sides respectively; A second sheet body having a second inner surface and a second outer surface located at opposite sides, and the second inner surface is spaced apart along a thickness direction and faces the first inner surface; Two electrode layers, respectively mounted on the first inner surface and the second inner surface; an insulating elastic body, sandwiched between the two electrode layers along the thickness direction; A pressure test piece, comprising: a main body, a bottom edge of which is fixed to the second outer surface of the second sheet; and a protrusion connected to the main body and in a protruding shape; wherein a projection space formed by the positive projection of the pressure-testing member along the thickness direction toward the first sheet body covers at least a portion of the insulating elastic body; and a bonding layer, comprising a support body, and a first bonding film and a second bonding film respectively connected to opposite sides of the support body; wherein the bonding layer is located outside the insulating elastic body, the support body is connected to the first inner surface of the first sheet body through the first bonding film, and is connected to the second inner surface of the second sheet body through the second bonding film; When the force sensor is subjected to an external force by the protrusion of the pressure measuring piece, the second sheet is compressed by the main body and elastically deformed, thereby forcing the insulating elastomer to produce elastic deformation, and at least one of the first bonding film and the second bonding film to produce elastic deformation.

11. The force sensor according to claim 10, characterized in that: At least one of the first bonding film and the second bonding film has a Shore hardness value covering 0 to 100 of Shore OOOS and 0 to 100 of Shore A.

12. The force sensor according to claim 10, characterized in that: The first sheet body, the second sheet body and the bonding layer together surround and form a deformation space, which is non-sealed and communicates with an external space.

13. The force sensor according to claim 10, characterized in that: The top edge of the protrusion is connected to the central part of the main body, and the protrusion has a height in the thickness direction which is not less than the thickness of the main body.

14. The force sensor according to claim 10, characterized in that: Along a transverse direction perpendicular to the thickness direction, the pressure-testing member has a first outer diameter, and the protrusion has a second outer diameter, which is 15% to 25% of the first outer diameter.

15. The force sensor according to claim 10, characterized in that: The insulating elastomer comprises: an insulating layer disposed on one of the electrode layers; and A plurality of columns, one end of which is connected to the insulating layer, and the other end of which is connected to another of the electrode layers; wherein the projection space covers the plurality of columns.

16. The force sensor according to claim 15, characterized in that: Along a transverse direction perpendicular to the thickness direction, the pressure-testing member has a first outer diameter, and there is a maximum distance between two columns that are far away from each other, which is 95% to 105% of the first outer diameter.

17. The force sensor according to claim 10, characterized in that: The force sensor further includes a bonding layer disposed on the first outer surface for bonding to an external object.

18. The force sensor according to claim 10, characterized in that: The first sheet body comprises: a first substrate having the first inner surface; and a first grounding layer, disposed on the first substrate and having the first outer surface; A first projection area formed by orthographically projecting the two electrode layers and the insulating elastic body along the thickness direction toward the first sheet is completely located in the first ground layer.

19. The force sensor according to claim 18, characterized in that: The second sheet body comprises: a second substrate having the second inner surface; and a second grounding layer, disposed on the second substrate and having the second outer surface, and the pressure-testing member is attached to the second grounding layer with the body; A second projection area formed by orthographically projecting the two electrode layers and the insulating elastic body toward the second sheet along the thickness direction is completely located in the second ground layer.

20. The force sensor according to claim 13, characterized in that: The projected space covers at least 50% of the area of ​​the insulating elastomer.

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