Head-mounted device

Abstract

The utility model discloses a head-mounted device, which comprises a helmet main body, an electrode tip and an annular fixing piece, and is characterized in that the inner wall of the helmet main body is provided with a first assembly structure; the electrode tip is connected with the helmet main body; the end, making contact with the helmet body, of the electrode tip is bent to form an outer flange, and a limiting channel is formed in the position, right opposite to the first assembling structure, of the outer flange. The annular fixing piece is nested on the electrode tip and is used for covering the outer flange; and a second assembly structure is arranged on the annular fixing piece, penetrates through the limiting channel, is in butt joint with the first assembly structure and is used for clamping the outer flange, so that the electrode tip is fixed on the helmet main body. The first assembling structure is connected with the second assembling structure, so that the annular fixing piece and the helmet body are connected into a whole, the outer flanging is pressed, and therefore the electrode tip is fixed, the structural stability is high, and long-term use is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of wearable devices, in particular to a head-mounted device. Background Art

[0002] The head-mounted device can be provided with various functional modules such as sound components, interference components, sensor components, optical components, pressure components, etc. on the shell to achieve various stimulation effects on the user's head, so it has broad application prospects. Moreover, the shape of existing head-mounted devices is mostly designed in the shape of a helmet or a headband, which is convenient for wearing and fixing; and the functional modules are directly assembled on the shell of the device to achieve the corresponding functions. For example, in the patent "A Transcranial Direct Current Stimulation Brain Helmet" with patent publication number: CN115887912A, it is recorded that sixteen electrode contacts are arranged on the inside of the helmet to contact and stimulate the human head.

[0003] However, considering that devices worn on the head have high requirements for wearing comfort, the electrode heads on existing head-mounted devices are made of flexible materials such as rubber or latex, and the flexible materials are directly fixed by plugging, snapping, etc., resulting in insufficient connection stability. During use, the electrode heads are easily deformed due to force, and the connection stability with the shell is reduced, resulting in structural dislocation, which is not conducive to long-term use.

[0004] Therefore, the prior art still needs to be improved and developed. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a head-mounted device, aiming to solve the problem that the connection stability of functional components on the existing head-mounted devices is insufficient, which is not conducive to long-term use.

[0006] The technical solution of the utility model is as follows:

[0007] A head-mounted device, comprising a helmet body, an electrode head and an annular fixing part, wherein a first assembly structure is provided on the inner wall of the helmet body; the electrode head is connected to the helmet body; an end of the electrode head in contact with the helmet body is bent to form an outer flange, and a limiting channel is provided on the outer flange at a position opposite to the first assembly structure; the annular fixing part is nested on the electrode head to cover the outer flange; a second assembly structure is provided on the annular fixing part, the second assembly structure passes through the limiting channel and docks with the first assembly structure, and is used to clamp the outer flange to fix the electrode head on the helmet body.

[0008] The head-mounted device, wherein when the first assembly structure and the second assembly structure are docked, a clamping space is formed between the annular fixing member and the helmet body, and a width value of the clamping space is less than or equal to a thickness value of the outer flange.

[0009] The head-mounted device described above, wherein an assembly hole is formed on the helmet body, and the first assembly structure is a connecting screw arranged in the assembly hole; the second assembly structure is a limiting column protruding from the annular fixing piece, and when the electrode head is assembled to the assembly groove, the limiting column is plugged into the limiting channel, and the front end of the limiting column extends into the assembly hole; an assembly groove opening toward the assembly groove is formed on the limiting column, and the assembly groove is threadedly connected to the connecting screw to fix the annular fixing piece.

[0010] The head mounted device, wherein the limiting column and the annular fixing member are integrally formed.

[0011] The head-mounted device, wherein the projection area of ​​the annular fixing part on the helmet body is the assembly area; a plurality of the first assembly structures are provided, and the plurality of the first assembly structures are arranged in a ring shape in the assembly area; a plurality of the second assembly structures are provided, and the plurality of the second assembly structures are arranged in a ring shape on the annular fixing part.

[0012] The head-mounted device, wherein the annular fixing member includes an extrusion portion and a surrounding portion, the extrusion portion is opposite to the outer flange, and the width of the outer flange is less than or equal to the width of the extrusion portion; the surrounding portion is arranged at the outer edge of the extrusion portion and is bent to form the surrounding portion, and the surrounding portion is used to shield the side wall of the outer flange.

[0013] The head-mounted device, wherein an assembly groove is provided on the inner wall of the helmet body, and the first assembly structure is provided in the assembly groove.

[0014] The head-mounted device, wherein the assembly groove is in a trumpet shape; and along the opening direction toward the assembly groove, the side wall of the assembly groove is inclined.

[0015] The head-mounted device, wherein the electrode head is any one of a rubber electrode head, a silicone electrode head, and a latex electrode head.

[0016] The head-mounted device, wherein the electrode head is an interference electrode or a forehead electrode.

[0017] Compared with the prior art, the embodiment of the utility model has the following advantages:

[0018] The inner side of the helmet body disclosed in the utility model is equipped with an electrode head. During wearing and use, the helmet body covers the user's head, and the electrode head contacts the user's head skin, so that it can receive electric signals to stimulate the human brain. Specifically, an annular fixing piece is nested on the electrode head, which passes through the limiting channel on the outer flange through the second assembly structure and is connected and fixed with the first assembly structure, so that the annular fixing piece presses the outer flange and fixes the electrode head on the helmet body. This fixing method is firm and reliable, not easy to loosen, and can also reduce the assembly gap through the squeezing force, improve the air tightness of the contact interface between the outer flange and the helmet body, and increase the waterproof performance of the equipment.

[0019] In addition, when the electrode head is made of a relatively soft material during the actual manufacturing process, the annular fixing member applies a certain pre-tightening force to the outer flange on the electrode head, causing the outer flange to deform to a certain extent. After reaching the limit of elastic deformation, the outer flange will no longer deform even if it is subjected to external force during use. Therefore, the problem of loose assembly caused by deformation is avoided and the stability of the connection is improved.

[0020] The second assembly structure is point-to-point connected to the first assembly structure, but the annular fixing piece is pulled by the second assembly structure and pressed toward the outer flange as a whole, so the entire contact surface of the outer flange is subjected to extrusion pressure, further improving the stability of the assembly and avoiding displacement or loosening problems.

[0021] In addition, the second assembly structure passes through the limiting channel and docks with the first assembly structure, so it is constrained by the second assembly structure, avoiding the outer flange from deflecting or sliding on the inner wall of the helmet body, thereby improving the stability of the electrode head during use.

[0022] In conclusion, the electrode head is fixedly assembled on the head-mounted device disclosed in the utility model, and the connection is firm, so the electrode head can remain stable for a long time, which is conducive to long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of the head-mounted device in the utility model;

[0025] Figure 2 This is an exploded diagram of the structure of the head-mounted device in the present utility model;

[0026] Figure 3 It is a structural schematic diagram of the annular fixing member in the utility model.

[0027] Among them, 10, helmet body; 11, assembly hole; 12, assembly groove; 20, electrode head; 21, outer flange; 211, limiting channel; 30, annular fixing part; 31, extrusion part; 32, surrounding part; 40, second assembly structure; 41, assembly groove. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1 and Figure 2 In one embodiment of the utility model application, a head-mounted device is disclosed, which includes a helmet body 10, an electrode head 20 and an annular fixing member 30, wherein a first assembly structure is provided on the inner wall of the helmet body 10; the electrode head 20 is connected to the helmet body 10; the end of the electrode head 20 in contact with the helmet body 10 is bent to form an outer flange 21, and a limiting channel 211 is provided on the outer flange 21 facing the first assembly structure; the annular fixing member 30 is nested on the electrode head 20 for covering the outer flange 21; a second assembly structure 40 is provided on the annular fixing member 30, the second assembly structure 40 passes through the limiting channel 211 and docks with the first assembly structure, and is used to clamp the outer flange 21 so that the electrode head 20 is fixed to the helmet body 10.

[0030] The inner side of the helmet body 10 disclosed in this embodiment is equipped with an electrode head 20. During wearing and use, the helmet body 10 covers the user's head, and the electrode head 20 contacts the user's head skin, thereby receiving electric signals to stimulate the human brain.

[0031] Specifically, the head mounted device may be equipped with functional modules such as a power module, a control module, and a display module, so as to control the electrode head 20 when worn, so as to adjust the stimulation effect of the electrode head 20 on the head. The helmet body 10, as a supporting frame of various modules, is generally made of hard plastic, such as polyvinyl chloride, polycarbonate, etc., which is formed by a mold at one time to obtain a high-strength, lightweight helmet body 10.

[0032] Specifically, the annular fixing part 30 nested on the electrode head 20 passes through the limiting channel 211 on the outer flange 21 through the second assembly structure 40, and is connected and fixed to the first assembly structure, so that the annular fixing part 30 presses the outer flange 21 to fix the electrode head 20 on the helmet body 10. This fixing method is firm and reliable, not easy to loosen, and can also reduce the assembly gap through the extrusion force, thereby improving the air tightness of the contact interface between the outer flange 21 and the helmet body 10 and increasing the waterproof performance of the equipment.

[0033] In the actual manufacturing process, the electrode head 20 uses a relatively soft material to enhance the touch of the surface and increase the comfort of contact with human skin. The outer flange 21 on the electrode head 20 is integrally formed by a mold, which is convenient to manufacture and easy to achieve an overall fixing effect. The annular fixing member 30 directly contacts the outer flange 21 and generates a certain clamping force, so the annular fixing member 30 can be set to a hard plastic or metal sheet with a hardness greater than that of the electrode head 20, so as to keep the annular fixing member 30 stable during the connection process, so as to maintain the state of squeezing the outer flange 21 and maintain the clamping effect.

[0034] Specifically, the annular fixing member 30 applies a certain pre-tightening force to the outer flange 21 on the electrode head 20, so that the outer flange 21 undergoes a certain deformation. After reaching the limit of elastic deformation, the outer flange 21 will no longer deform even if subjected to external force during use, thereby avoiding the problem of loose assembly caused by deformation and improving the stability of the connection.

[0035] Specifically, the second assembly structure 40 is point-to-point connected to the first assembly structure, but the annular fixing member 30 is pulled by the second assembly structure 40 and pressed toward the outer flange 21 as a whole, so that the entire contact surface of the outer flange 21 is subjected to the extrusion pressure, which further improves the stability of the assembly and avoids the problem of displacement or looseness.

[0036] In addition, the second assembly structure 40 passes through the limiting channel 211 and docks with the first assembly structure, and is therefore constrained by the second assembly structure, thereby preventing the outer flange 21 from deviating or sliding on the inner wall of the helmet body 10, thereby improving the stability of the electrode head 20 during use.

[0037] In summary, the electrode head 20 is fixedly assembled on the head-mounted device disclosed in this embodiment, and the connection is firm. The electrode head 20 can remain stable for a long time, which is conducive to long-term use.

[0038] Specifically, as another implementation of this embodiment, the electrode head 20 is disclosed as an interference electrode or a forehead electrode. In this embodiment, an electrode sheet can be set on the inner surface of the electrode head 20, and connected to the control circuit inside the helmet body 10 through a wire. The interference electrode can perform signal stimulation work, and the control circuit sends an electrical signal to the electrode sheet, which is transmitted to the human skin by the conductivity of the electrode head 20, thereby stimulating the human body; of course, in this embodiment, the electrode head 20 can also be set as a forehead electrode to receive brain wave signals. When the human brain generates microcurrent, the electrode head 20 receives the current signal and transmits it to the electrode sheet, which is sent to the control circuit through the electrode sheet. Regardless of the type of electrode head 20 used in this embodiment, the free end of the electrode head 20 needs to contact the human skin, and the fixed end, that is, the end in contact with the helmet body 10, needs to remain fixed to facilitate wiring and stable transmission of electrical signals.

[0039] Specifically, as an implementation of this embodiment, it is disclosed that the electrode head 20 is any one of a rubber electrode head 20, a silicone electrode head 20, and a latex electrode head 20. In this embodiment, the electrode head 20 is made by utilizing the characteristics of rubber, latex or silicone type electrode heads 20 that have both conductivity and flexibility, so that the electrode head 20 can meet the electrical requirements and surface flexibility requirements. It should be noted that this embodiment only cites the types of electrode heads 20, but the protection scope of the utility model is not limited to this. As long as other types of electrode heads 20 can achieve the technical effects disclosed in this application, as an equivalent replacement of the concept of the utility model, they should also be within the scope of protection of this application.

[0040] Specifically, as another implementation of this embodiment, it is disclosed that when the first assembly structure and the second assembly structure 40 are docked, a clamping space is formed between the annular fixing member 30 and the helmet body 10, and the width of the clamping space is less than or equal to the thickness of the outer flange 21.

[0041] In this embodiment, the annular fixing part 30 and the helmet body 10 are respectively located on both sides of the outer flange 21. When the width of the space between the annular fixing part 30 and the helmet body 10 is less than or equal to the thickness value of the outer flange 21, the outer flange 21 is subjected to extrusion pressure on both sides. Therefore, the static friction between the surface of the annular fixing part 30 and the inner surface of the helmet body 10 is large, thereby having high stability. During use, even if the free end of the electrode head 20 is collided and squeezed and deformed, the outer flange 21 at the rear end can remain in its original state and maintain a stable connection state, which is conducive to long-term use.

[0042] Specifically, in the present embodiment, the second assembly structure 40 is first inserted into the limiting channel 211, and then the annular fixing part 30 gradually moves toward the helmet body 10 during the docking process with the first assembly structure, thereby clamping the outer flange 21. During the deformation process of the outer flange 21, it is limited by the second assembly structure 40, and the outer flange 21 will not slide laterally due to squeezing, thereby maintaining the accuracy of the assembly position, which is conducive to improving the stability of long-term use.

[0043] Specifically, as another implementation mode of the present embodiment, it is disclosed that a positioning hole can be set on the inner wall of the helmet body 10, a positioning passage can be set at a position corresponding to the positioning hole on the electrode head 20, and a positioning block is protruding from the annular fixing member 30. The positioning block passes through the positioning passage and is inserted into the positioning hole, thereby playing a role of pre-positioning during the assembly process, so as to facilitate the pre-positioning of the annular fixing member 30, the electrode head 20 and the helmet body 10, improve assembly efficiency and assembly accuracy, and reduce assembly errors.

[0044] like Figure 2 and Figure 3 As shown, as another implementation of this embodiment, an assembly hole 11 is formed on the helmet body 10, and the first assembly structure is a connecting screw arranged in the assembly hole 11; the second assembly structure 40 is a limiting column protruding from the annular fixing piece 30, and when the electrode head 20 is assembled to the assembly groove 12, the limiting column is plugged into the limiting channel 211, and the front end of the limiting column extends into the assembly hole 11; an assembly groove 41 opening toward the assembly groove 12 is formed on the limiting column, and the assembly groove 41 is threadedly connected to the connecting screw to fix the annular fixing piece 30.

[0045] The connecting screws and the limiting column disclosed in this embodiment are fixed by screw connection, which has the advantages of detachability, simple assembly, and firm connection. After the limiting column and the connecting screw are connected as one, the structural strength is high, and the pressure-bearing capacity of the limiting column can be increased. When the outer flange 21 is deformed and squeezes the limiting column, the risk of cracking or breaking of the limiting column is reduced.

[0046] It should be noted that the screw-connected fixing method of the first assembly structure and the second assembly structure 40 disclosed in this embodiment is only an example and not an exhaustive one. In the actual manufacturing process, the first assembly structure and the second assembly structure 40 can be set as two clips for clip connection, or they can be fixed by bonding. Therefore, as an equivalent replacement conceived in this embodiment, it should also be within the scope of protection of this application.

[0047] Specifically, as another implementation of this embodiment, the limiting column and the annular fixing member 30 are integrally formed. The integrally formed structure has good mechanical properties, high strength, and is not easy to crack. After the limiting column disclosed in this embodiment is connected with the connecting screw, a pulling force is generated on the annular fixing member 30, so the advantage of integral forming can reduce the risk of separation of the limiting column and the annular fixing member 30.

[0048] Specifically, as another implementation of this embodiment, it is disclosed that the projection area of ​​the annular fixing part 30 on the helmet body 10 is the assembly area; there are multiple first assembly structures, and the multiple first assembly structures are arranged in a ring shape in the assembly area; there are multiple second assembly structures 40, and the multiple second assembly structures 40 are arranged in a ring shape on the annular fixing part 30.

[0049] In this embodiment, the outer flange 21 is formed by bending along the end of the electrode head 20 and is arranged in a ring shape, so multiple first assembly structures and multiple second assembly structures 40 are provided to increase the fixing tension on the annular fixing part 30, so that the connection between the annular fixing part 30 and the helmet body 10 is more firmly, and at the same time, the clamping force on the outer flange 21 is more uniform, further improving the stability of the structure.

[0050] like Figure 3 As shown, as another implementation of this embodiment, it is disclosed that the annular fixing member 30 includes an extrusion portion 31 and a surrounding portion 32, the extrusion portion 31 is opposite to the outer flange 21, and the width of the outer flange 21 is less than or equal to the width of the extrusion portion 31; the surrounding portion 32 is arranged at the outer edge of the extrusion portion 31 and is bent to form the surrounding portion 32, and the surrounding portion 32 is used to shield the side wall of the outer flange 21.

[0051] The outer flange 21 disclosed in this embodiment is prone to slight warping and deformation at its edge after being squeezed, and an extrusion portion 31 is provided to cover the outer flange 21 from the side of the outer flange 21 away from the helmet body 10, and a surrounding portion 32 is provided to cover the side wall of the outer flange 21 from the side, so that the outer flange 21 is completely wrapped between the annular fixing part 30 and the helmet body 10, further increasing the air tightness, so that the waterproof performance of the head-mounted device is better during use, which is beneficial to protecting the electrical devices inside the device.

[0052] For example Figure 1 and Figure 2As shown, as another implementation of this embodiment, it is disclosed that the inner wall of the helmet body 10 is provided with an assembly groove 12, and the first assembly structure is arranged in the assembly groove 12. The inner wall of the helmet body 10 disclosed in this embodiment faces the human head, and the assembly groove 12 is provided. The electrode head 20 is partially arranged in the assembly groove 12, which reduces the squeezing pressure on the human head and is conducive to improving the wearing comfort. In addition, the electrode head 20 is inserted into the assembly groove 12 for assembly, which is more convenient to operate and facilitates the rapid positioning of the installation position of the electrode head 20, thereby improving the assembly efficiency. In addition, the electrode head 20 is fixed in the assembly groove 12 with better stability and is not easy to loosen, which is conducive to the long-term use of the equipment.

[0053] Specifically, as another implementation of this embodiment, the shape of the assembly groove 12 is disclosed to be trumpet-shaped; along the opening direction of the assembly groove 12, the side wall of the assembly groove 12 is inclined. In this embodiment, the electrode head 20 is inserted into the assembly groove 12 for assembly, and the shape of the assembly groove 12 is trumpet-shaped, with a large opening and a small bottom, and the inclined side wall is used to generate a guiding effect, thereby facilitating positioning and assembly.

[0054] In summary, the present application discloses a head-mounted device, which includes a helmet body 10, an electrode head 20 and an annular fixing member 30, wherein a first assembly structure is provided on the inner wall of the helmet body 10; the electrode head 20 is connected to the helmet body 10; the end of the electrode head 20 in contact with the helmet body 10 is bent to form an outer flange 21, and a position limiting channel 211 is provided on the outer flange 21 facing the first assembly structure; the annular fixing member 30 is nested on the electrode head 20 for covering the outer flange 21; the annular fixing member 30 is provided with a second assembly structure 40, which passes through the position limiting channel 211 and docks with the first assembly structure, and is used to clamp the outer flange 21, so that the electrode head 20 is fixed on the helmet body 10. The electrode head 20 is assembled on the inner side of the helmet body 10 disclosed in this embodiment. During wearing and use, the helmet body 10 covers the user's head, and the electrode head 20 contacts the user's head skin, so that it can receive electric signals to stimulate the human brain. Specifically, the annular fixing part 30 is nested on the electrode head 20, passes through the limiting channel 211 on the outer flange 21 through the second assembly structure 40, and is connected and fixed with the first assembly structure, so that the annular fixing part 30 presses the outer flange 21 and fixes the electrode head 20 on the helmet body 10. This fixing method is firm and reliable and not easy to loosen. The annular fixing part 30 is subjected to the pulling force of the second assembly structure 40 and is pressed toward the outer flange 21 as a whole. Therefore, the entire contact surface of the outer flange 21 is subjected to the squeezing force, which further improves the stability of the assembly and avoids the problem of displacement or loosening. It can be seen that the electrode head 20 is fixedly assembled on the head-mounted device disclosed in this embodiment, and the connection is firm. The electrode head 20 can remain stable for a long time, which is conducive to long-term use.

[0055] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0056] It should be noted that the present invention takes a head-mounted device as an example to introduce the specific structure and working principle of the present invention, but the application of the present invention is not limited to head-mounted devices, and can also be applied to the production and use of other similar workpieces.

[0057] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A head mounted device, characterized in that: include: A helmet body, wherein a first assembly structure is provided on an inner wall of the helmet body; An electrode head connected to the helmet body; One end of the electrode head in contact with the helmet body is bent to form an outer flange, and a limiting channel is provided on the outer flange at a position facing the first assembly structure; An annular fixing member is nested on the electrode head and is used to cover the outer flange; Wherein, a second assembly structure is provided on the annular fixing member, and the second assembly structure passes through the limiting channel and docks with the first assembly structure, and is used for clamping the outer flange to fix the electrode head on the helmet body.

2. The head mounted device according to claim 1, wherein: When the first assembly structure and the second assembly structure are butted against each other, a clamping space is formed between the annular fixing member and the helmet body, and a width of the clamping space is less than or equal to a thickness of the outer flange.

3. The head mounted device according to claim 1, wherein: An assembly hole is formed on the helmet body, and the first assembly structure is a connecting screw arranged in the assembly hole; The second assembly structure is a limiting column protruding from the annular fixing member. When the electrode head is connected to the helmet body, the limiting column is plugged into the limiting channel, and the front end of the limiting column extends into the assembly hole. Wherein, an assembly groove opening toward the helmet body is formed on the limiting column, and the assembly groove is threadedly connected with the connecting screw to fix the annular fixing piece.

4. The head mounted device according to claim 3, wherein: The limiting column and the annular fixing piece are integrally formed.

5. The head mounted device according to claim 1, wherein: The projection area of ​​the annular fixing member on the helmet body is an assembly area; a plurality of the first assembly structures are provided, and the plurality of the first assembly structures are arranged in an annular shape in the assembly area; There are multiple second assembly structures, and the multiple second assembly structures are arranged in a ring shape on the annular fixing member.

6. The head mounted device according to claim 1, wherein: The annular fixing member includes an extrusion portion and a surrounding portion, wherein the extrusion portion is opposite to the outer flange, and the width of the outer flange is less than or equal to the width of the extrusion portion; the surrounding portion is arranged at the outer edge of the extrusion portion and is bent to form the surrounding portion, and the surrounding portion is used to shield the side wall of the outer flange.

7. The head mounted device according to claim 1, wherein: An assembly groove is provided on the inner wall of the helmet body, and the first assembly structure is arranged in the assembly groove.

8. The head mounted device according to claim 7, wherein: The shape of the assembly groove is trumpet-shaped; along the opening direction toward the assembly groove, the side wall of the assembly groove is inclined.

9. The head mounted device according to any one of claims 1 to 8, characterized in that: The electrode head is any one of a rubber electrode head, a silicone electrode head and a latex electrode head.

10. The head mounted device according to any one of claims 1 to 8, characterized in that: The electrode head is an interference electrode or a forehead electrode.

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