Torque indicating device for electrical equipment and electrical equipment
By using torque indicators in electrical equipment, the problem of users being unable to accurately control bolt torque is solved, ensuring reliable connection of electrical equipment and preventing loose connections, thus improving the convenience of tightening operations.
Patent Information
- Application Number
- CN202423015493.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-06
AI Technical Summary
Users cannot accurately control the torque when rotating the bolts of electrical equipment, which leads to loose connections and overheating between the terminals and wires. The bolts are also easy to loosen and are not easily detected, resulting in the terminals and surrounding areas of the electrical equipment burning.
A torque indicator device is designed, including a torque element and an indicator element. The torque element is coupled to the bolt of the electrical equipment. The torque element moves between loose and tight positions through the deformation indicator element to indicate whether the torque of the bolt and the threaded hole has reached the predetermined requirements, thereby improving the convenience of bolt tightening for users.
By observing the position of the indicator, users can determine the tightness of the bolts, avoid loose connections and ensure reliable connection of electrical equipment.
Smart Images
Figure CN223503174U_ABST
Abstract
Description
Technical Field
[0001] The exemplary embodiments disclosed herein generally relate to the field of electrical equipment, and particularly to torque indicating devices and electrical equipment for use in electrical equipment. Background Technology
[0002] Electrical equipment is widely used in power generation, transmission, transformation, distribution, and consumption, playing a role in controlling, protecting, regulating, converting, and switching on / off power. Electrical equipment is typically coupled to cables via terminal blocks. Specifically, the user inserts the cable into the terminal block and rotates the bolt, thus securing the cable within the terminal block.
[0003] However, users often cannot accurately control the torque of bolt rotation when rotating bolts, which can easily lead to loose connections and overheating between the terminals and wires. Utility Model Content
[0004] In a first aspect of this disclosure, a torque indicating device for an electrical device is provided. The torque indicating device includes: a torque member disposed within the housing of the electrical device and coupled to a bolt of the electrical device, the torque member being adapted to be deformed by compression from the bolt during rotation of the bolt within a threaded hole of the electrical device to a predetermined position; the torque member including: a pair of elastic portions disposed radially along the bolt and spaced apart by a predetermined distance, the pair of elastic portions adapted to contact the bolt to be compressed and brought closer together during rotation of the bolt within the threaded hole to the predetermined position; a pair of extensions, each coupled to the pair of elastic portions and adapted to extend along the axial direction of the bolt; and a connecting portion disposed between and coupled to the pair of extensions; and an indicating member movably coupled to the housing of the electrical device and adapted to move between a loose position and a tight position as the torque member deforms, the indicating member indicating, in the loose position, that the torque of the bolt and threaded hole is below a predetermined torque requirement, and in the tight position, that the torque of the bolt and threaded hole reaches or exceeds the predetermined torque requirement.
[0005] In some embodiments, the indicator includes: a body; an indicator end disposed at one end of the body and adapted to extend toward an indicator window of the housing; and a contact end disposed at the other end of the body opposite to the first end and in contact with a torque member or bolt, the contact end being adapted to move the indicator end between a loose position facing the indicator window and a tight position away from the indicator window during a change in the position of the torque member or bolt.
[0006] In some embodiments, the indicator further includes: a pair of rotating parts, respectively arranged on opposite sides of the body, and the pair of rotating parts are aligned on an axis, the pair of rotating parts being coupled to the housing and rotating about an axis relative to the housing.
[0007] In some embodiments, the torque indicating device further includes a spring disposed between the indicator and the housing, and coupled to the indicator and the housing.
[0008] In some embodiments, the indicator further includes a relief groove disposed at the contact end and partially surrounding the outside of the bolt.
[0009] In some embodiments, a pair of elastic portions are arranged at and in contact with the end of the bolt to be compressed and deformed by the end of the bolt during the rotation of the bolt to a predetermined position within the threaded hole.
[0010] In some embodiments, the connection includes a through hole to allow bolts to pass through.
[0011] In some embodiments, the indicator abuts against the connection portion of the torque member.
[0012] In some embodiments, a pair of resilient portions are arranged on and in contact with the head of the bolt to be compressed and deformed by the head of the bolt as the bolt rotates in the threaded hole toward a predetermined position.
[0013] In some embodiments, the torque member includes a pair of coupling grooves formed on one side of a pair of elastic portions facing the bolt and partially surrounding the outer periphery of the bolt.
[0014] In some embodiments, the indicator abuts against the head of the bolt.
[0015] In some embodiments, the middle section of the connecting portion bends toward the elastic portion.
[0016] In some embodiments, the middle section of the first extension of the pair of extensions bends toward the second extension of the pair of extensions.
[0017] According to some embodiments of the present disclosure, a torque indicator device for electrical equipment has a torque member coupled to the bolt of the electrical equipment terminal. When the bolt is coupled to the threaded hole of the electrical equipment and the bolt rotates into the threaded hole, the bolt can squeeze the torque member and cause the torque member to deform. During this period, the indicator, which is movably coupled to the electrical equipment, moves from a loose position to a tight position as the torque member deforms. Thus, the user can judge the tightness of the bolt (i.e., whether the torque between the bolt and the threaded hole has reached the predetermined torque requirement) by observing the position of the indicator, thereby improving the convenience for the user when tightening the bolt.
[0018] In a second aspect of this disclosure, an electrical device is provided. The electrical device includes: a housing including a threaded hole; a bolt; a torque indicator disposed within and threadedly engaging the threaded hole; and a torque indicator according to a first aspect of this disclosure, disposed within the housing, wherein the housing further includes an indicator window, an indicator element of the torque indicator being adapted to be partially exposed within the indicator window during a loose position.
[0019] It should be understood that the content described in this content section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0020] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:
[0021] Figure 1A A schematic diagram of an electrical device according to some embodiments of the present disclosure is shown, wherein an indicator is in a loose position and is exposed within an indicator window of the housing;
[0022] Figure 1B A schematic diagram of an electrical device according to some other embodiments of the present disclosure is shown, wherein the indicator is in a fastened position and is concealed within a housing;
[0023] Figure 2A A schematic diagram of a torque indicator device according to some embodiments of the present disclosure in a bolt-loose state is shown;
[0024] Figure 2B A schematic diagram of a torque indicator device according to some embodiments of the present disclosure in a bolt-tightened state is shown;
[0025] Figure 3A A schematic diagram of the overall structure of a torsion member according to some embodiments of the present disclosure in its natural state without being subjected to bolt compression is shown;
[0026] Figure 3B A schematic diagram of the overall structure of a torsion member according to some embodiments of the present disclosure under the deformation state after being subjected to bolt compression is shown;
[0027] Figure 4A A schematic diagram of an indicator and a spring according to some embodiments of the present disclosure is shown;
[0028] Figure 4B A schematic diagram of the indicator and spring assembled according to some embodiments of the present disclosure is shown;
[0029] Figure 5AA schematic diagram of a torsion member in its natural state without being subjected to bolt compression, according to some other embodiments of the present disclosure, is shown;
[0030] Figure 5B A schematic diagram is shown of a torsion member under bolt compression in a deformed state according to some other embodiments of the present disclosure;
[0031] Figure 6A A schematic diagram of a torque indicator device according to some other embodiments of the present disclosure in a bolt-loose state is shown;
[0032] Figure 6B A schematic diagram of a torque indicator device according to some other embodiments of the present disclosure in a bolt-tightened state is shown; and
[0033] Figure 7 A schematic diagram showing the mating relationship between an indicator and a bolt according to some other embodiments of this disclosure is shown. Detailed Implementation
[0034] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.
[0035] It should be noted that the headings of any section / subsection provided herein are not limiting. Various embodiments are described throughout this document, and embodiments of any type may be included under any section / subsection. Furthermore, embodiments described in any section / subsection may be combined in any way with any other embodiments described in the same section / subsection and / or different sections / subsections.
[0036] In the description of embodiments of this disclosure, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". Other explicit and implicit definitions may also be included below. The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.
[0037] As briefly mentioned earlier, in traditional technology, when users connect wires to the terminals of electrical equipment, the bolt torque may not meet the predetermined requirements, leading to a loose connection and overheating between the terminal and the wire, which can cause the terminal and surrounding area of the electrical equipment to melt. Furthermore, after prolonged use, the bolts on the terminals can easily loosen, and this loosening is often difficult to detect. This can also easily result in a loose connection between the terminal and the wire.
[0038] The torque indicating device and electrical equipment for electrical equipment provided in this disclosure solve, or at least partially solve, the aforementioned problems and other potential problems existing in conventional solutions. According to some embodiments of the torque indicating device for electrical equipment, a torque member is coupled to a bolt at a terminal of the electrical equipment. When the bolt is coupled to a threaded hole in the electrical equipment and the bolt rotates into the threaded hole, the bolt can compress the torque member, causing it to deform. During this period, an indicator movably coupled to the electrical equipment moves from a loose position to a tight position as the torque member deforms. Thus, the user can determine the tightness of the bolt (i.e., whether the torque between the bolt and the threaded hole has reached a predetermined torque requirement) by observing the position of the indicator.
[0039] According to embodiments of this disclosure, electrical equipment can be devices used in various fields such as power generation, distribution, and consumption that require connection to cables or wires. For example, electrical equipment can be circuit breakers, distribution cabinets, switchgear, motors, etc. The following description primarily uses circuit breakers as an example to illustrate electrical equipment and torque indicating devices installed at the terminals of electrical equipment. It should be understood that the same applies to other types of electrical equipment, and this disclosure will not elaborate further. Furthermore, the bolts, threaded holes, and other structures mentioned in embodiments of this disclosure can be understood as bolts and threaded holes at the terminals of electrical equipment. The term "bolt head" as used in embodiments of this disclosure refers to the end of the bolt with a drive groove for tool coupling; for example, the bolt head can be the end of the bolt with a cross-shaped groove for screwdriver coupling. Similarly, the term "bolt end" can be the end of the bolt away from the "head".
[0040] Figure 1A A schematic diagram of an electrical device according to some embodiments of the present disclosure is shown, wherein the indicator 2 is in a loose position and is exposed within the indicator window 41 of the housing 4. Figure 1B A schematic diagram of an electrical device according to some other embodiments of the present disclosure is shown, wherein the indicator 2 is in a secured position and is concealed within the housing 4. Figure 1A and Figure 1B As shown, the electrical equipment generally includes a housing 4 and terminals arranged within the housing 4, which are suitable for fixing wires to the electrical connection components within the electrical equipment.
[0041] The electrical equipment housing 4 also includes a torque indicator for indicating the tightness of the bolts 5 and threaded holes of the terminals (i.e., whether the torque of the bolts 5 and threaded holes meets a predetermined requirement). In some embodiments, the housing 4 also has an indicator window 41. If the tightness of the bolts 5 and threaded holes does not meet the predetermined requirement (i.e., the torque of the bolts 5 and threaded holes is lower than a predetermined torque requirement), a portion of the torque indicator will be exposed in the indicator window 41. As the bolts 5 are screwed into the threaded holes, the tightness of the bolts 5 and threaded holes reaches the predetermined requirement (i.e., the torque of the bolts 5 and threaded holes meets or exceeds the predetermined torque requirement), and the portion of the torque indicator exposed in the indicator window 41 is moved and hidden under the housing. Thus, the user can confirm whether the bolts 5 are properly tightened through the indicator window 41.
[0042] Figure 2A A schematic diagram of a torque indicator device according to some embodiments of the present disclosure in the state of bolt 5 being loose is shown. Figure 2B A schematic diagram of a torque indicator device according to some embodiments of the present disclosure in the bolt 5 tightened state is shown. As shown in FIG2, the torque indicator device includes a torque member 1 and an indicator 2. The torque member 1 is coupled to the bolt 5 and is adapted to be compressed by the bolt 5 to undergo elastic deformation during the engagement of the bolt 5 with the threaded hole. The indicator 2 is adapted to move according to the deformation of the torque member 1 or the positional change of the bolt 5, thereby indicating to the user whether the torque of the bolt 5 with the threaded hole has reached a predetermined requirement.
[0043] Figure 3A and Figure 3B The following are schematic diagrams showing the overall structure of the torque member 1 in different states according to some embodiments of the present disclosure. Figure 3A The intermediate torque component 1 is in its natural state, not subjected to the compression of bolt 5. Figure 3B The intermediate torsion member 1 is in the deformed state after being compressed by bolt 5. For example... Figure 3A and Figure 3B As shown, the torque member 1 includes a connecting portion 13, a pair of extensions 12 coupled to the connecting portion 13, and a pair of elastic portions 11 respectively coupled to the pair of connecting portions 13. The connecting portion 13 extends radially along the bolt 5, and the pair of extensions 12 are respectively coupled to both ends of the connecting portion 13 in the radial direction and extend axially along the bolt 5. The pair of elastic portions 11 are arranged radially along the bolt 5 and are spaced apart by a predetermined distance. The pair of elastic portions 11 are respectively coupled to one end of the pair of extensions 12 away from the connecting portion 13. In some embodiments, the connecting portion 13 further includes a through hole 14 extending through the connecting portion 13 to allow the bolt 5 to pass through.
[0044] In some embodiments, the elastic portion 11 is further arranged such that it gradually moves away from the connecting portion 13 as it extends toward the axis of the bolt 5. That is, the distance from the end of the elastic portion 11 toward the connecting portion 13 along the axis of the bolt 5 is greater than the distance from the end of the elastic portion 11 toward the connecting portion 13.
[0045] like Figure 2A and Figure 2B As shown, during the screwing of bolt 5 into the threaded hole, the end 52 of bolt 5 can compress a pair of elastic portions 11, bringing the pair of elastic portions 11 closer together. During this period, the torque member 1... Figure 3A The natural state shown Figure 3B The deformation state shown gradually changes. Because bolt 5 needs to overcome the resistance (elastic force) generated by the deformation of torque element 1 when it is screwed into the threaded hole, if torque element 1 deforms to the point shown by bolt 5... Figure 3B The deformation state shown indicates that the torque of bolt 5 in the threaded hole has reached the predetermined requirement.
[0046] Figure 4A A schematic diagram of an indicator 2 and a spring 3 according to some embodiments of the present disclosure is shown. Figure 4B A schematic diagram of the indicator 2 and spring 3 assembled according to some embodiments of the present disclosure is shown. Figure 4A and Figure 4B As shown, and with reference Figure 2A and Figure 2B The indicator 2 includes a body 21, with an indicator end 22 and a contact end 23 respectively arranged at both ends of the body 21. The indicator end 22 is coupled to a section of the body 21 facing the indicator window 41 of the housing 4, and the contact end 23 is coupled to the end of the body 21 away from the indicator end 22. The contact end 23 of the indicator 2 is adapted to contact the torque member 1 or the bolt 5 to move during deformation of the torque member 1 or change of position of the bolt 5, thereby causing the indicator end 22 to move between a loose position facing the indicator window 41 and a tight position away from the indicator window 41.
[0047] In some embodiments, the indicator 2 further includes a pair of rotating portions 24, which are respectively arranged on opposite sides of the body 21 and aligned on the axis. The pair of rotating portions 24 are respectively coupled to the housing 4, for example, by partially embedding the pair of rotating portions 24 into grooves in the housing 4, thereby allowing the indicator 2 to rotate about the axis of the rotating portion 24. If the torque member 1 deforms, the indicator 2 can rotate about the axis of the rotating portion 24 according to the deformation of the torque member 1, causing the indicator end 22 to exit the indicator window 41.
[0048] In some other embodiments, the indicator 2 may also move in the form of translation, deflection or other movements during the deformation of the torsion member 1, so that the indicator end 22 of the indicator 2 moves relative to the indicator window 41.
[0049] In some embodiments, a spring 3 is also arranged on the indicator 2, with one end of the spring 3 coupled to the indicator 2 and the other end coupled to any one of the housing 4, the torque member 1, and the bolt 5. The spring 3 can provide elastic force to the indicator 2, making the contact end 23 of the indicator 2 more stably abut against the torque member 1 or the bolt 5. Thus, the indicator 2 can respond and move quickly as the bolt 5 is screwed into the threaded hole. Therefore, the indicator 2 can more promptly remind the user whether the tightening of the bolt 5 has met the predetermined requirements.
[0050] In some embodiments, the indicator 2 further includes a relief groove 25 formed at the contact end 23, and the relief groove 25 is arranged to be partially circular to partially surround the circumference of the bolt 5.
[0051] Return to reference Figure 2A and Figure 2B The contact end 23 of the indicator 2 abuts against the connecting portion 13 of the torque member 1. During the screwing of the bolt 5 into the threaded hole, the bolt 5 compresses the elastic portion 11 of the torque member 1, causing the connecting portion 13 of the torque member 1 to deform along with the elastic portion 11. For example, as a pair of elastic portions 11 approach each other, the connecting portion 13 can move closer to the elastic portion 11 at least along the axial direction of the bolt 5. Due to the change in position of the connecting portion 13, the contact end 23 of the indicator 2 causes the indicator 2 to rotate, so that the indicator end 22 rotates from a loose position facing the indicator window 41 to a tight position away from the indicator window 41. Therefore, if the user cannot observe the indicator end 22 within the indicator window 41, it indicates that the bolt 5 has been tightened to the correct position.
[0052] Figure 5A and Figure 5B A schematic diagram of the torque member 1 according to some other embodiments of the present disclosure is shown, wherein Figure 5A The intermediate torque component 1 is in its natural state, not subjected to the compression of bolt 5. Figure 5B The intermediate torque component 1 is in a deformed state after being compressed by bolt 5. Similar to the torque component 1 described above, Figure 5A and Figure 5BThe torque member 1 includes a connecting portion 13, a pair of extensions 12 coupled to the connecting portion 13, and a pair of elastic portions 11 respectively coupled to the pair of extensions 12. The pair of elastic portions 11 extend in the axial direction of the bolt 5 and are adapted to contact the head 51 of the bolt 5. In this way, as the bolt 5 is screwed into the threaded hole, the pair of elastic portions 11 contact the head 51 of the bolt 5 and move closer to each other under the compression of the head 51 of the bolt 5. The torque member 1 deforms and simultaneously provides a reaction force to the bolt 5. In some embodiments, the torque member 1 further includes a pair of coupling grooves 15, which are respectively formed on opposite sides of the pair of coupling portions, and the openings of the pair of coupling grooves 15 are arranged facing each other. The bolt 5 can be inserted between the pair of coupling grooves 15, and each coupling groove 15 can partially surround the circumferential surface of the bolt 5.
[0053] In some embodiments, the middle section of the connecting portion 13 bends toward the elastic portion 11. In some other embodiments, the middle section of each of the pair of extensions 12 bends toward the other extension 12. In this way, during the compression of the elastic portion 11, the extensions 12 of the torsion member 1 and the connecting portion 13 can also deform accordingly and provide an elastic force to the bolt 5.
[0054] Figure 6A A schematic diagram of a torque indicator device according to some other embodiments of the present disclosure in the state of bolt 5 being loose is shown. Figure 6B A schematic diagram of a torque indicator device according to some other embodiments of the present disclosure with bolt 5 tightened is shown. Figure 6A and Figure 6B As shown, the contact end 23 of the indicator 2 is coupled to the head 51 of the bolt 5, and the spring 3 is coupled between the indicator 2 and the bolt 5. Thus, the contact end 23 of the indicator 2 is pressed against the spring 3, and the indicator 2 rotates as the bolt 5 is screwed deeper into the threaded hole. Consequently, the indicating end 22 of the indicator 2 can... Figure 6A The center is exposed at position 41 and rotates to Figure 6B The position is offset from the indicator window 41 and hidden inside the housing 4. The user can confirm that the bolt 5 is rotated into place from this position.
[0055] Furthermore, if the bolt 5 loosens from the threaded hole after a period of use, the indicator 2 rotates, and the indicator end 22 of the indicator 2 is exposed again in the indicator window 41. This allows the user to easily check the status of the terminals and perform maintenance during the maintenance process.
[0056] Figure 7 A schematic diagram illustrating the mating relationship between the indicator 2 and the bolt 5 is shown in some other embodiments according to this disclosure. For example... Figure 7As shown, the contact end 23 of the indicator 2 can also be arranged on the side of the bolt head 51 facing the end 52, and is locked by the bolt head 51 during the rotation of the bolt 5 into the threaded hole, so as to move with the movement of the bolt 5.
[0057] Various implementations of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed implementations. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described implementations. The terminology used herein is chosen to best explain the principles, practical applications, or improvements to technology in the market, or to enable others skilled in the art to understand the various implementations disclosed herein.
Claims
1. A torque indicating device for electrical equipment, characterized in that, include: A torque element (1), disposed within the housing (4) of the electrical equipment and coupled to a bolt (5) of the electrical equipment, the torque element (1) being adapted to be deformed by compression of the bolt (5) during the rotation of the bolt (5) to a predetermined position within the threaded hole of the electrical equipment, the torque element (1) comprising: A pair of elastic portions (11) are arranged radially along the bolt (5) and spaced apart by a predetermined distance. The pair of elastic portions (11) are adapted to contact the bolt (5) so as to be squeezed and brought closer to each other during the rotation of the bolt (5) to a predetermined position in the threaded hole. A pair of extensions (12), each coupled to a pair of elastic portions (11), and adapted to extend along the axial direction of the bolt (5); and A connecting portion (13) is arranged between the pair of extensions (12) and coupled to the pair of extensions (12); as well as An indicator (2) is movably coupled to the housing (4) of the electrical equipment and adapted to move between a loose position and a tight position as the torque member (1) deforms. In the loose position, the indicator (2) indicates that the torque of the bolt (5) and the threaded hole is lower than a predetermined torque requirement, and in the tight position, the indicator (2) indicates that the torque of the bolt (5) and the threaded hole reaches or exceeds the predetermined torque requirement.
2. The torque indicating device according to claim 1, characterized in that, The indicator (2) includes: Ontology(21); An indicator end (22) is disposed at one end of the body (21) and adapted to extend toward an indicator window (41) of the housing (4); and A contact end (23) is disposed on the other end of the body (21) opposite to the first end and contacts the torque member (1) or the bolt (5). The contact end (23) is adapted to move the indicator end (22) between a loose position facing the indicator window (41) and a tight position away from the indicator window (41) during a change in the position of the torque member (1) or the bolt (5).
3. The torque indicating device according to claim 2, characterized in that, The indicator (2) also includes: A pair of rotating parts (24) are respectively arranged on opposite sides of the body (21), and the pair of rotating parts (24) are aligned on the axis. The pair of rotating parts (24) are respectively coupled to the housing (4) and rotate about the axis relative to the housing (4).
4. The torque indicating device according to any one of claims 1-3, characterized in that, Also includes: A spring (3) is arranged between the indicator (2) and the housing (4) and coupled to the indicator (2) and the housing (4).
5. The torque indicating device according to claim 2 or 3, characterized in that, The indicator (2) also includes: A relief groove (25) is arranged at the contact end (23) and partially surrounds the outside of the bolt (5).
6. The torque indicating device according to any one of claims 1-3, characterized in that, The pair of elastic portions (11) are arranged at the end (52) of the bolt (5) and in contact with the end (52) of the bolt (5) so as to be squeezed and deformed by the end (52) of the bolt (5) during the rotation of the bolt (5) to a predetermined position in the threaded hole.
7. The torque indicating device according to claim 5, characterized in that, The connecting part (13) includes a through hole (14) to allow the bolt (5) to pass through.
8. The torque indicating device according to claim 6, characterized in that, The indicator (2) abuts against the connecting part (13) of the torque member (1).
9. The torque indicating device according to any one of claims 1-3, characterized in that, The pair of elastic portions (11) are arranged on the head (51) of the bolt (5) and in contact with the head (51) of the bolt (5) to be compressed and deformed by the head (51) of the bolt (5) during the rotation of the bolt (5) to a predetermined position in the threaded hole.
10. The torque indicating device according to claim 9, characterized in that, The torque member (1) includes a pair of coupling grooves (15), which are respectively formed on the side of the pair of elastic portions (11) facing the bolt (5) and partially surround the outer periphery of the bolt (5).
11. The torque indicating device according to claim 9, characterized in that, The indicator (2) abuts against the head (51) of the bolt (5).
12. The torque indicating device according to any one of claims 1-3, characterized in that, The middle section of the connecting part (13) bends toward the side of the elastic part (11).
13. The torque indicating device according to any one of claims 1-3, characterized in that, The middle section of the first extension (12) of the pair of extensions (12) bends toward the second extension (12) of the pair of extensions (12).
14. An electrical device, characterized in that, include: Housing (4), including threaded holes; Bolt (5); arranged in the threaded hole and threadedly engaged with the threaded hole, and The torque indicating device according to any one of claims 1-13 is arranged within the housing (4), and in, The housing (4) also includes an indicator window (41), and the indicator (2) of the torque indicator is adapted to be partially exposed in the indicator window (41) during the loose position.