Gasket for fastener, fastening unit, and photovoltaic module

Abstract

The present application provides a gasket for a fastener, a fastening unit and a photovoltaic module. The fastener is used to fix a frame to a support structure and at least a portion of the fastener is adapted to be inserted into an opening on a wall portion of the frame and to exert a fastening force on the edge of the opening. The gasket comprises a bearing portion adapted to be arranged between the at least a portion of the fastener and the edge of the opening to bear the fastening force exerted by the at least a portion of the fastener and an attachment portion configured to attach the gasket to the frame. The fastening unit comprises the aforementioned fastener and gasket. The photovoltaic module comprises the aforementioned fastening unit. In the gasket for a fastener, the fastening unit and the photovoltaic module according to the present application, the bearing portion of the gasket can bear and disperse the fastening force exerted by the fastener on the opening of the wall portion of the frame, thereby avoiding stress concentration at the edge of the opening. Furthermore, the gasket can be self-retained at the frame by the attachment portion, which can simplify the assembly process.

Description

Technical Field

[0001] This invention relates generally to the field of photovoltaic technology, and more specifically to gaskets for fasteners used in photovoltaic modules, fastening units for photovoltaic modules, and photovoltaic modules. Background Technology

[0002] Currently, photovoltaic (PV) modules typically include PV panels, a support structure for supporting the PV panels, and fasteners for securing the PV panel frames to the support structure. PV panel frames are currently available in both metallic and non-metallic configurations. With the increasing demand for cost reduction in the PV industry, cost-effective non-metallic frames are gaining more attention and are being used more frequently.

[0003] Non-metallic frames can be made, for example, from composite materials consisting of a matrix resin and reinforcing materials. Composite frame materials exhibit significant property differences from metallic frame materials; for instance, they are more prone to creep or damage under external forces than metallic frame materials. Therefore, there is a need to develop fasteners specifically for non-metallic frame materials to reduce creep or damage. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to propose an improved gasket, fastening unit and photovoltaic module for fasteners.

[0005] To this end, a first aspect of the invention provides a gasket for a fastener, wherein the fastener is used to secure a frame to a support structure and at least a portion of the fastener is adapted to be inserted into an opening in a wall portion of the frame and to apply a fastening force to an edge of the opening, wherein the gasket includes: a bearing portion adapted to be disposed between the at least a portion of the fastener and an edge of the opening to bear the fastening force applied by the at least a portion of the fastener; and an attachment portion configured to attach the gasket to the frame.

[0006] The first aspect of the invention may further include any one or more of the following alternative forms.

[0007] In some alternative forms, the gasket includes a gasket body, wherein the attachment portion is connected to the gasket body via the carrier portion, and wherein the attachment portion and the gasket body are adapted to abut opposite sides of the wall portion to attach the gasket to the wall portion.

[0008] In some alternative forms, the attachment is in the form of a hook.

[0009] In some alternative forms, the attachment portion includes a flange extending from the support portion and a plurality of attachment tabs spaced apart on the flange and adapted to abut against the wall portion.

[0010] In some alternative forms, the support portion is adapted to extend along the entire edge of the opening and / or the support portion has an annular shape; or the support portion is adapted to extend along a portion of the edge of the opening and / or the support portion has an arcuate shape.

[0011] In some alternative forms, the gasket includes a gasket body, wherein the support portion extends from the gasket body, and wherein the gasket body is adapted to abut against a protrusion of the frame extending from the wall portion, so as to allow the fastening force borne by the support portion to be transmitted through the gasket body to the protrusion.

[0012] In some alternative forms, the gasket body includes a first body portion and a second body portion connected to each other, wherein the support portion extends from the first body portion, the first body portion is adapted to abut the wall portion, and the second body portion is adapted to abut the protrusion.

[0013] In some alternative forms, the second body portion includes a guide portion configured to guide at least a portion of the fastener into the opening.

[0014] In some alternative forms, the guide portion is in the form of a raised rib.

[0015] A second aspect of the invention provides a fastening unit comprising a fastener and a washer for the fastener according to a first aspect of the invention, wherein the fastener is configured to secure a frame to a support structure, wherein at least a portion of the fastener is adapted to be inserted into an opening in a wall portion of the frame and to apply a fastening force to an edge of the opening, and wherein a bearing portion of the washer is adapted to be disposed between the at least a portion of the fastener and an edge of the opening.

[0016] The second aspect of the invention may further include any one or more of the following optional forms.

[0017] In some alternative forms, the fastener includes a first segment and a second segment defining a receiving channel therebetween, wherein the fastener is adapted to pass through a through-hole in a wall segment of the support structure along a first direction to reach a first position, wherein, when the fastener is in the first position, the first segment and the second segment are located on opposite sides of the wall segment, wherein the fastener is adapted to move from the first position to a second position along a second direction, wherein, when the fastener is in the second position, the first segment is inserted into an opening in the wall portion of the frame, and the bearing portion of the gasket, a portion of the wall portion adjacent to the opening, and a portion of the wall segment adjacent to the through-hole are received by the receiving channel and held between the first segment and the second segment.

[0018] In some alternative forms, the fastener includes a top wall, a side wall, and a wing, the wing being connected to the top wall via the side wall, wherein the side wall includes a groove comprising a first edge and a second edge opposite to each other, and the first edge being closer to the top wall than the second edge, wherein the first segment includes portions of the top wall and the side wall extending from the top wall to the first edge, and the second segment includes portions of the wing and the side wall extending from the second edge to the wing.

[0019] In some alternative forms, a limiting notch is provided at the first edge, wherein the limiting notch is adapted to engage with the bearing portion of the gasket to restrict relative movement between the fastener and the gasket.

[0020] In some alternative forms, the gasket includes a guide, along which the sidewall is slidable to guide the fastener to move toward the second position in the second direction.

[0021] In some alternative forms, the first direction is generally perpendicular to the wall section of the support structure, wherein the wing is elastically deformable and includes a bent portion connected to the sidewall and at least one retaining portion extending from the bent portion at an acute angle to the first direction, wherein, when the fastener is in the second position, the bearing portion of the gasket, a portion of the wall portion adjacent to the opening, and a portion of the wall section adjacent to the through hole are held between the first section and the at least one retaining portion.

[0022] In some alternative forms, the at least one retaining portion includes a first retaining portion and a second retaining portion, wherein the first retaining portion forms a first angle with the first direction, the second retaining portion forms a second angle with the first direction, and the first angle is smaller than the second angle.

[0023] In some alternative forms, the fastener includes two sidewalls and two wings, wherein each wing is connected to the top wall via a corresponding sidewall, wherein the two sidewalls are symmetrically disposed at opposite side edges of the top wall and the two wings are symmetrically disposed.

[0024] In some alternative configurations, the first direction is substantially perpendicular to the second direction.

[0025] A third aspect of the present invention provides a photovoltaic module, the photovoltaic module including a photovoltaic panel, a support structure, and a fastening unit according to a second aspect of the present invention, wherein the fastening unit is used to fix the frame of the photovoltaic panel to the support structure.

[0026] In the gaskets, fastening units, and photovoltaic modules for fasteners according to the present invention, the bearing portion of the gasket can bear and disperse the fastening force applied by the fastener to the opening of the wall portion of the frame, thereby avoiding stress concentration at the edge of the opening. This is particularly advantageous for non-metallic frames made of composite materials of matrix resin and reinforcing material, preventing creep or damage to the non-metallic frame due to stress concentration at the edge of the opening. Simultaneously, the gasket can be self-retained at the frame by its attachment portion, which facilitates the pre-installation of multiple gaskets onto the frame of the photovoltaic panel during, for example, photovoltaic module assembly, simplifying the assembly process. Attached Figure Description

[0027] Other features and advantages of the invention will be better understood through the following detailed description of optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar parts, wherein:

[0028] Figure 1 This is a schematic partial perspective view of a photovoltaic module according to a first exemplary embodiment of the present invention;

[0029] Figure 2A and Figure 2B These are schematic partial cross-sectional views of a photovoltaic module according to a first exemplary embodiment of the present invention, cut along different planes.

[0030] Figure 3 yes Figure 1 A schematic three-dimensional view of the fastening unit of a photovoltaic module;

[0031] Figure 4 yes Figure 1 A schematic plan view of the fastening unit of a photovoltaic module;

[0032] Figure 5A yes Figure 1 A schematic perspective view of the fasteners of the fastening unit of a photovoltaic module;

[0033] Figure 5B and Figure 5C They are Figure 1 Schematic plan view of the fasteners of the fastening unit of the photovoltaic module viewed from different angles;

[0034] Figure 6A yes Figure 1 A schematic perspective view of the gaskets of the fastening unit of a photovoltaic module;

[0035] Figure 6B yes Figure 1 A schematic plan view of the gaskets for the fastening unit of a photovoltaic module;

[0036] Figure 7A yes Figure 1 A schematic diagram showing the pre-installation of gaskets for the fastening unit of a photovoltaic module at the frame of the photovoltaic panel;

[0037] Figure 7B yes Figure 1 A schematic diagram showing the fasteners of the photovoltaic module fastening unit pre-installed on the support structure;

[0038] Figure 8 This is a schematic partial perspective view of a photovoltaic module according to a second exemplary embodiment of the present invention;

[0039] Figure 9 yes Figure 8 A schematic three-dimensional view of the fastening unit of a photovoltaic module;

[0040] Figure 10A yes Figure 8 A schematic perspective view of the gaskets of the fastening unit of a photovoltaic module;

[0041] Figure 10B yes Figure 8 A schematic plan view of the gaskets for the fastening unit of a photovoltaic module;

[0042] Figure 11 This is a schematic partial perspective view of a photovoltaic module according to a third exemplary embodiment of the present invention;

[0043] Figure 12 yes Figure 11 A schematic three-dimensional view of the fastening unit of a photovoltaic module;

[0044] Figure 13 yes Figure 11 A schematic perspective view of the fasteners of the fastening unit of a photovoltaic module;

[0045] Figure 14A yes Figure 11 A schematic perspective view of the gaskets of the fastening unit of a photovoltaic module;

[0046] Figure 14B yes Figure 11 A schematic plan view of the gaskets for the fastening unit of a photovoltaic module;

[0047] Figure 15 This is a schematic partial perspective view of a photovoltaic module according to a fourth exemplary embodiment of the present invention;

[0048] Figure 16 yes Figure 15 A schematic perspective view of the fastening unit of the photovoltaic module; and

[0049] Figure 17 yes Figure 15 A schematic three-dimensional view of the gaskets of the fastening unit of a photovoltaic module. Detailed Implementation

[0050] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of particular ways of implementing and using the invention, and are not intended to limit the scope of the invention. The descriptions of the structural positions of the various components, such as upper, lower, top, bottom, etc., are not absolute but relative. These orientations are appropriate when the various components are arranged as shown in the figures, but they change accordingly when the positions of the components in the figures change.

[0051] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In this invention, unless otherwise expressly specified, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Figures 1 to 7B A photovoltaic module 1 and its components according to a first exemplary embodiment of the present invention are shown.

[0053] Reference Figure 1 A photovoltaic module 1 typically includes multiple fastening units 10, multiple photovoltaic panels, and multiple support structures 30. The support structures 30 support the photovoltaic panels, and the fastening units 10 secure the photovoltaic panels to the support structures 30. It should be noted that... Figure 1 The image shows a partial portion of a photovoltaic module 1, and more specifically, a fastening unit 10 securing a frame 20 of a photovoltaic panel to a support structure 30, wherein only a partial portion of the frame 20 of the photovoltaic panel and the support structure 30 are shown.

[0054] A photovoltaic panel typically includes a panel body and a frame 20 surrounding the panel body. The frame 20 can be a metal frame or a non-metal frame. A non-metal frame can be made of a composite material of a matrix resin (including but not limited to epoxy resin and polyurethane) and a reinforcing material (including but not limited to glass fiber and carbon fiber). For example, a non-metal frame can be made of glass fiber reinforced polyurethane. The frame 20 can be an elongated profile. In the illustrated embodiment, the frame 20 may include a frame body 21 having a generally rectangular cross-section and a first protrusion 22 and a second protrusion 23 extending from the frame body 21. In the illustrated embodiment, the frame body 21 may include a top wall portion 24, a bottom wall portion 25, and two side wall portions 26A, 26B connecting the top wall portion 24 and the bottom wall portion 25. The first protrusion 22 may extend from the side wall portion 26A of the frame body 21 and is coplanar with the bottom wall portion 25 of the frame body 21. The second protrusion 23 may extend from the side wall portion 26B of the frame body 21, and the second protrusion 23 is generally L-shaped and at least partially coplanar with the side wall portion 26B of the frame body 21. The second protruding portion 23 cooperates with the top wall portion 24 of the frame body 21 to hold the edge of the photovoltaic panel body therebetween. The frame body 21 may have a plurality of openings 27 spaced apart along the length of the frame 20 on the side wall portion 26A adjacent to the first protruding portion 22. Each opening 27 may receive a corresponding fastening unit 10 to secure the frame 20 to a corresponding support structure 30. In the illustrated embodiment, the first protruding portion 22 of the frame 20 is relatively wide and in the form of a slat; it is conceivable that in other embodiments, the frame may have other suitable constructions, for example, such as... Figure 11 As shown, the first protruding part 22 of the frame 20 can also be narrower and in the form of a rib.

[0055] Continue to refer to Figure 1The support structure 30 can be fixed to the roof of a building, a leg connected to the ground, a pile foundation or floating platform on a mountain, or in a lake or sea. In the illustrated embodiment, the support structure 30 is an elongated support beam with a generally C-shaped cross-section. The support structure 30 may include a base wall section 31, two side wall sections 32 extending from opposite side edges of the base wall section 31, and two flanges 33 extending toward each other from the two side wall sections 32. A side wall section 32 of the support structure 30 may have a plurality of through holes 34 spaced apart along the length of the support structure 30. Each through hole 34 may receive a corresponding fastening unit 10 to secure the support structure 30 to the frame 20 of the corresponding photovoltaic panel. The side wall section 32 of the support structure 30 with through holes 34 may contact and support the frame 20 of the photovoltaic panel, more specifically, the first protruding portion 22 and the bottom wall portion 25 of the frame 20. It is conceivable that in other embodiments, the support structure may have other suitable constructions, such as having a generally U-shaped cross-section, i.e., the support structure may not have flanges.

[0056] Reference Figures 1 to 2B , Figures 5A to 7B The fastening unit 10 includes a fastener 100 and a washer 200. The fastener 100 may include a first segment 102 and a second segment 104. The first segment 102 and the second segment 104 define a fastening / retaining structure, and the first segment 102 and the second segment 104 define a receiving channel 106 therebetween. The fastener 100 can pass through a through-hole 34 in a sidewall segment 32 of the support structure 30 along a first direction D1 to reach... Figure 7B The first position is shown. When the fastener 100 is in the first position, the receiving channel 106 of the fastener 100 is aligned with the sidewall section 32, and the first section 102 and the second section 104 are located on opposite sides of the sidewall section 32, respectively. The fastener 100 can move from the first position relative to the support structure 30 along the second direction D2 to the position shown. Figure 1 In the second position shown, when the fastener 100 is in the second position, the first segment 102 is inserted into the opening 27 of the sidewall portion 26A of the frame 20, and a portion of the sidewall portion 26A adjacent to the opening 27 and a portion of the sidewall section 32 adjacent to the through hole 34 are received by the receiving channel 106 and clamped / held between the first segment 102 and the second segment 104. In other words, the first segment 102 applies a fastening force to the sidewall portion 26A of the frame 20, particularly the edge of the opening 27, and the second segment 104 applies a fastening force to the sidewall section 32 of the support structure 30, thereby fixing the frame 20 of the photovoltaic panel to the support structure 30. In the illustrated embodiment, the first direction D1 is approximately perpendicular to the second direction D2, and the second direction D2 is the length direction of the support structure 30.

[0057] Reference Figures 1 to 2B as well as Figures 6A to 6B The gasket 200 includes a support portion 202 and an attachment portion 204. The support portion 202 is disposed between the first segment 102 of the fastener 100 and the edge of the opening 27 to bear and distribute the fastening force applied by the first segment 102 of the fastener 100. The attachment portion 204 is configured to attach the gasket 200 to the frame 20. The support portion 202 of the gasket 200 can bear and distribute the fastening force applied by the first segment 102 of the fastener 100 to the opening 27 of the sidewall portion 26A, thereby avoiding stress concentration at the edge of the opening 27. This is particularly advantageous for non-metallic frames made of composite materials of matrix resin and reinforcing material, as it can prevent creep or damage to the non-metallic frame due to stress concentration at the edge of the opening 27. At the same time, the aforementioned gasket 200 can be self-held at the frame 20 of the photovoltaic panel by the attachment portion 204, which facilitates the pre-installation of multiple gaskets 200 onto the frame 20 of the photovoltaic panel during the assembly of the photovoltaic module 1, thereby simplifying the assembly process.

[0058] Reference Figures 1 to 2B as well as Figures 5A to 7B In the illustrated embodiment, the fastener 100 can be integrally formed from a sheet metal by stamping. The fastener 100 may include a top wall 108, two side walls 110, and two wings 112. The top wall 108 is connected to the two wings 112 via the two side walls 110. Specifically, the two opposite side edges of the top wall 108 are connected to the top edges of the two side walls 110, and each of the two wings 112 is connected to the bottom edge of the corresponding side wall 110. In the illustrated embodiment, the two side walls 110 are symmetrically arranged, and the two wings 112 are symmetrically arranged. It is conceivable that in other embodiments not shown, the two side walls may be asymmetrical, and the two wings may also be asymmetrical.

[0059] The initial spacing between the portions of the two sidewalls 110 of the fastener 100 that are adapted to contact the edge of the through hole 34 when the fastener 100 is in the first position can be greater than the width w of the through hole 34. When the fastener 100 is inserted into the through hole 34 along the first direction D1, a force needs to be applied to the fastener 100, causing the two sidewalls 110 of the fastener 100 to move closer together through elastic deformation, allowing the fastener 100 to be inserted into the through hole 34. After the fastener 100 has reached the first position, it only partially recovers its elastic deformation, allowing the fastener 100 to remain in the through hole 34 by means of its own elastic restoring force.

[0060] Each of the two sidewalls 110 of the fastener 100 includes a recess 114 to define a receiving channel 106. Each recess 114 includes a first edge 116 and a second edge 118 opposite to each other, wherein the first edge 116 is closer to the top wall 108 than the second edge 118. The fastener 100 can be divided into the aforementioned first segment 102 and second segment 104 by the receiving channel 106 / recess 114. The first segment 102 includes the portion of the top wall 108 and each of the two sidewalls 110 extending from the top wall 108 to the first edge 116, and the second segment 104 includes two wings 112 and the portion of each of the two sidewalls 110 extending from the second edge 118 to the wings 112.

[0061] Each of the two wings 112 of the fastener 100 is elastically deformable and includes a bent portion 120 connected to the bottom edge of the sidewall 110 and at least one retaining portion 122 extending from the bent portion 120 at an acute angle to a first direction D1. The bent portion 120 of the wing 112 can absorb / buffer vibrations caused by external factors such as wind, improving the fatigue resistance of the photovoltaic module 1. In the illustrated embodiment, the bent portion 120 may have a generally teardrop-shaped profile. When the fastener 100 is in the second position, a portion of the sidewall portion 26A of the frame 20 adjacent to the opening 27 and a portion of the sidewall section 32 of the support structure 30 adjacent to the through hole 34 are held between the first section 102 and at least one retaining portion 122; in other words, at least one retaining portion 122 can provide a fastening force to the sidewall section 32 of the support structure 30. In the illustrated embodiment, each retaining portion 122 is in the form of a tab.

[0062] At least one retaining portion 122 may include a first retaining portion 122A and a second retaining portion 122B. The first retaining portion 122A forms a first angle α with the first direction D1, and the second retaining portion 122B forms a second angle β with the first direction D1, wherein the first angle α is less than the second angle β. When the fastener 100 is in the second position and under normal use conditions, the first retaining portion 122A abuts against the sidewall section 32 of the support structure 30 to provide a fastening force, while the second retaining portion 122B may not contact or only slightly contact the sidewall section 32 of the support structure 30. When the fastener 100 is in the second position and under special usage conditions (e.g., when the frame 20 of the photovoltaic panel tends to move upward away from the support structure 30 due to external factors such as strong winds), the wing 112 can undergo elastic deformation, so that both the first retaining portion 122A and the second retaining portion 122B abut against the side wall section 32 of the support structure 30. Thus, the first retaining portion 122A and the second retaining portion 122B jointly prevent the frame 20 of the photovoltaic panel from separating from the support structure 30, avoiding excessive local stress on the fastener 100 and structural damage.

[0063] Reference Figures 1 to 2B as well as Figures 5A to 6B In the illustrated embodiment, the gasket 200 can be integrally formed from a sheet metal by stamping. The gasket 200 may include a gasket body 206, and the attachment portion 204 can be connected to the gasket body 206 via the carrier portion 202. In the illustrated embodiment, the gasket body 206 has a bent shape and includes a first body portion 208 and a second body portion 210 connected to each other. Both the first body portion 208 and the second body portion 210 are plate-shaped.

[0064] In the illustrated embodiment, the support portion 202 extends generally vertically from the first main body portion 208 of the gasket body 206. The support portion 202 may extend along a portion of the edge of the opening 27 to have an arcuate shape. When the fastener 100 is in the second position, the support portion 202 is located between the first edge 116 of the first segment 102 of the fastener 100 and the edge of the opening 27. The support portion 202 can bear and distribute the fastening force exerted by the first edge 116 of the first segment 102 of the fastener 100 on the edge of the opening 27, thereby preventing stress concentration at the edge of the opening 27 of the frame 20, which could lead to creep or damage to the frame 20. In the illustrated embodiment, the support portion 202 extends along the main stress-bearing portion of the edge of the opening 27, rather than the entire edge, which can reduce the required size of the opening 27 and reduce the weakening of the frame 20 structure.

[0065] In the illustrated embodiment, the first edge 116 of the first segment 102 of the fastener 100 may be provided with a limiting notch 124, which may engage with the bearing portion 202 of the gasket 200 to restrict the relative movement of the fastener 100 and the gasket 200, for example, to prevent the fastener 100 from moving relative to the gasket 200 along the second direction D2 and in the direction opposite to the second direction D2.

[0066] In the illustrated embodiment, the attachment portion 204 and the first body portion 208 of the gasket body 206 are adapted to abut against opposite sides (i.e., opposite side surfaces) of the sidewall portion 26A of the frame 20 to attach the gasket 200 to the sidewall portion 26A. The attachment portion 204 extends from the support portion 202 and is in the form of a hook. In the illustrated embodiment, the gasket 200 is provided with only one attachment portion 204, which reduces the assembly force required for the gasket 200 to be pre-installed to the frame 20.

[0067] In the illustrated embodiment, the second main body portion 210 can be substantially perpendicular to the first main body portion 208 and can abut against the first protruding portion 22 of the frame 20. The fastening force on the bearing portion 202 is adapted to be transmitted to the first protruding portion 22 through the first main body portion 208 and the second main body portion 210, further dispersing the force and avoiding stress concentration, thereby improving the fatigue resistance of the photovoltaic module 1.

[0068] In the illustrated embodiment, the second body portion 210 may further include a guide portion 212 configured to guide the first segment 102 of the fastener 100 into the opening 27 of the frame 20 along the second direction D2. The guide portion 212 may be in the form of a rib and adapted to extend along the second direction D2. In the illustrated embodiment, the second body portion 210 includes two guide portions 212 spaced apart from each other, and the two sidewalls 110 of the fastener 100 are slidable along the two guide portions 212 respectively (during which the two guide portions 212 are located between the two sidewalls 110), thereby guiding the fastener 100 into the opening 27 along the second direction D2 to reach a second position.

[0069] Reference Figure 1 as well as Figure 7A and Figure 7BDuring the process of securing the frame 20 of the photovoltaic panel to the support structure 30 via the fastening unit 10, the gasket 200 can be pre-installed at the opening 27 of the frame 20, and the fastener 100 can be moved along the first direction D1 through the through hole 34 of the support structure 30 to pre-install the fastener 100 in the first position. Then, the photovoltaic panel is placed in the appropriate position on the support structure 30, and the fastener 100 is inserted along the guide portion 212 of the gasket 200 along the second direction D2 into the opening 27 of the frame 20 to reach the second position. In the second position, at least the bearing portion 202 of the gasket 200, the portion of the frame 20 adjacent to the opening 27, and the portion of the support structure 30 adjacent to the through hole 34 are held / fastened between the first segment 102 and the second segment 104 of the fastener 100.

[0070] Figures 8 to 10B A photovoltaic module and its components according to a second exemplary embodiment of the present invention are shown. The photovoltaic module according to the second exemplary embodiment is similar to the photovoltaic module according to the first exemplary embodiment, except that the construction of the spacer 200 of the photovoltaic module 1 according to the second exemplary embodiment is slightly different.

[0071] Reference Figures 8 to 10B According to a second exemplary embodiment, the spacer 200 of the photovoltaic module 1 has a spacer body 206, a support portion 202, and an attachment portion 204. The spacer body 206 has a bent shape and includes a first body portion 208 and a second body portion 210 connected to each other, both the first body portion 208 and the second body portion 210 being plate-shaped. The support portion 202 extends from the first body portion 208 of the spacer body 206 and is adapted to extend along the entire edge of the opening 27 of the frame 20, thereby having an annular shape. The annular shape of the support portion 202 can more comprehensively protect the opening 27 of the frame 20 to prevent creep or damage at the opening 27 of the frame 20 due to stress concentration. The attachment portion 204 may include a flange 214 extending from the support portion 202 and a plurality of attachment tabs 216 spaced apart on the flange 214 and adapted to abut against the sidewall portion 26A of the frame 20. Multiple attachment tabs 216 can provide a more uniform anti-detachment force, which helps to attach the gasket 200 to the frame 20 more securely. In the illustrated embodiment, the attachment portion 204 includes three attachment tabs 216. It is conceivable that in other embodiments, the attachment portion may also include other suitable numbers of attachment tabs.

[0072] Figures 11 to 14B A photovoltaic module and its components according to a third exemplary embodiment of the present invention are shown. The photovoltaic module according to the third exemplary embodiment is similar to the photovoltaic module according to the first exemplary embodiment; the main differences between the two will be described below.

[0073] Reference Figures 11 to 14B Compared to the first protruding portion of the frame of the photovoltaic module according to the first exemplary embodiment, the first protruding portion 22 of the frame 20 of the photovoltaic module 1 according to the third exemplary embodiment has a significantly smaller width and is in the form of an elongated rib. Correspondingly, the second body portion 210 of the gasket 200 according to the third exemplary embodiment also has a smaller width, thus having a strip shape. The second body portion 210 of the gasket 200 can abut against the first protruding portion 22 of the frame 20, allowing the fastening force on the bearing portion 202 of the gasket 200 to be transmitted to the first protruding portion 22 through the first body portion 208 and the second body portion 210 of the gasket 200, further dispersing the force, avoiding stress concentration, and thereby improving the fatigue resistance of the photovoltaic module 1. In addition, since the widths of the first protruding portion 22 of the frame 20 and the second body portion 210 of the gasket 200 are small, the receiving channel 106 of the fastener 100 can be shortened, thereby making the fastener 100 more compact.

[0074] Figures 15 to 17 A photovoltaic module and its components according to a fourth exemplary embodiment of the present invention are shown. The photovoltaic module according to the fourth exemplary embodiment is similar to the photovoltaic module according to the third exemplary embodiment; the main differences between the two will be described below.

[0075] Reference Figures 15 to 17 According to the fourth exemplary embodiment, the carrier portion 202 of the spacer 200 of the photovoltaic module 1 extends from the first body portion 208 of the spacer body 206 and extends along the entire edge of the opening 27 of the frame 20, thereby having a generally annular shape. The attachment portion 204 of the spacer 200 includes a flange 214 extending from the carrier portion 202 and a plurality of attachment tabs 216 spaced apart on the flange 214 and adapted to abut against the sidewall portion 26A of the frame 20.

[0076] It is understood that the application of the fastening unit according to the present invention is not limited to fixing the frame of a photovoltaic panel to a support structure, but can also be used to fix the frame of various other components (e.g., various panels) to a support structure.

[0077] It should also be understood that the various components and features described herein may be made of a variety of materials, including but not limited to polymers, rubber, metals, and other suitable materials or combinations thereof known to those skilled in the art. Figures 1 to 17 The embodiments shown only illustrate the shape, quantity, size, and arrangement of various optional components of the gaskets, fastening units, and photovoltaic modules for fasteners according to the present invention. However, they are merely illustrative and not limiting. Other shapes, sizes, and arrangements may be adopted without departing from the spirit and scope of the present invention.

[0078] The technical content and features of the present invention have been disclosed above. However, it is understood that, under the inventive concept of the present invention, those skilled in the art can easily make modifications, variations, and equivalents of these embodiments based on the disclosed content. For example, features shown or described as part of one embodiment can be used with another embodiment to produce yet another embodiment. This disclosure is intended to cover these modifications, variations, and equivalents. The description of the above embodiments is exemplary and not restrictive, and the scope of protection of the present invention is determined by the claims.

Claims

1. A gasket for fasteners, wherein, The fastener (100) is used to secure the frame (20) to the support structure (30), and at least a portion of the fastener (100) is adapted to be inserted into an opening (27) on the wall portion (26A) of the frame (20) and to apply a fastening force to the edge of the opening (27), wherein the gasket (200) comprises: A support portion (202), said support portion (202) being adapted to be disposed between said at least a portion of said fastener (100) and the edge of said opening (27) to bear the fastening force applied by said at least a portion of said fastener (100); and An attachment portion (204) is configured to attach the gasket (200) to the frame (20).

2. The gasket for fasteners according to claim 1, characterized in that, The gasket (200) includes a gasket body (206), wherein the attachment portion (204) is connected to the gasket body (206) via the support portion (202), and wherein the attachment portion (204) and the gasket body (206) are adapted to abut against opposite sides of the wall portion (26A) to attach the gasket (200) to the wall portion (26A).

3. The gasket for fasteners according to claim 2, characterized in that, The attachment (204) is in the form of a hook.

4. The gasket for fasteners according to claim 2, characterized in that, The attachment portion (204) includes a flange (214) extending from the support portion (202) and a plurality of attachment tabs (216) spaced apart on the flange (214) and adapted to abut against the wall portion (26A).

5. The gasket for fasteners according to claim 1, characterized in that, The support portion (202) is adapted to extend along the entire edge of the opening (27) and / or the support portion (202) has an annular shape; or The support portion (202) is adapted to extend along a portion of the edge of the opening (27) and / or the support portion (202) has an arcuate shape.

6. The gasket for fasteners according to any one of claims 1 to 5, characterized in that, The gasket (200) includes a gasket body (206), wherein the support portion (202) extends from the gasket body (206), wherein the gasket body (206) is adapted to abut against a protrusion (22) of the frame (20) extending from the wall portion (26A) to allow the fastening force borne by the support portion (202) to be transmitted through the gasket body (206) to the protrusion (22).

7. The gasket for fasteners according to claim 6, characterized in that, The gasket body (206) includes a first body portion (208) and a second body portion (210) connected to each other, wherein the support portion (202) extends from the first body portion (208), the first body portion (208) is adapted to abut against the wall portion (26A), and the second body portion (210) is adapted to abut against the protrusion portion (22).

8. The gasket for fasteners according to claim 7, characterized in that, The second main body portion (210) includes a guide portion (212) configured to guide at least a portion of the fastener (100) into the opening (27).

9. The gasket for fasteners according to claim 8, characterized in that, The guide portion (212) is in the form of a rib.

10. A fastening unit, characterized in that, The fastening unit (10) includes a fastener (100) and a gasket for the fastener according to any one of claims 1 to 9, wherein the fastener (100) is configured to secure the frame (20) to the support structure (30), wherein at least a portion of the fastener (100) is adapted to be inserted into an opening (27) on a wall portion (26A) of the frame (20) and to apply a fastening force to the edge of the opening (27), wherein a bearing portion (202) of the gasket (200) is adapted to be disposed between the at least a portion of the fastener (100) and the edge of the opening (27).

11. The fastening unit according to claim 10, characterized in that, The fastener (100) includes a first segment (102) and a second segment (104) defining a receiving channel (106) therebetween. The fastener (100) is adapted to pass through a through-hole (34) in a wall section (32) of the support structure (30) along a first direction (D1) to reach a first position. When the fastener (100) is in the first position, the first segment (102) and the second segment (104) are located on opposite sides of the wall section (32). 0) Adapted to move from the first position along the second direction (D2) to a second position, wherein when the fastener (100) is in the second position, the first segment (102) is inserted into the opening (27) of the wall portion (26A) of the frame (20), and the receiving portion (202) of the gasket (200), a portion of the wall portion (26A) adjacent to the opening (27) and a portion of the wall section (32) adjacent to the through hole (34) are received by the receiving channel (106) and held between the first segment (102) and the second segment (104).

12. The fastening unit according to claim 11, characterized in that, The fastener (100) includes a top wall (108), a side wall (110), and a wing (112), the wing (112) being connected to the top wall (108) via the side wall (110). The side wall (110) includes a groove (114) having a first edge (116) and a second edge (118) opposite each other, the first edge (116) being closer to the top wall (108) than the second edge (118). The first segment (102) includes portions of the top wall (108) and the side wall (110) extending from the top wall (108) to the first edge (116), and the second segment (104) includes portions of the wing (112) and the side wall (110) extending from the second edge (118) to the wing (112).

13. The fastening unit according to claim 12, characterized in that, A limiting notch (124) is provided at the first edge (116), wherein the limiting notch (124) is adapted to engage with the bearing portion (202) of the gasket (200) to limit the relative movement of the fastener (100) and the gasket (200).

14. The fastening unit according to claim 12, characterized in that, The gasket (200) includes a guide (212) wherein the sidewall (110) is slidable along the guide (212) to guide the fastener (100) to move toward the second position in the second direction (D2).

15. The fastening unit according to claim 12, characterized in that, The first direction is generally perpendicular to the wall section (32) of the support structure (30), wherein the wing (112) is elastically deformable and includes a bent portion (120) connected to the sidewall (110) and at least one retaining portion (122) extending from the bent portion (120) at an acute angle to the first direction (D1), wherein, when the fastener (100) is in the second position, the bearing portion (202) of the gasket (200), a portion of the wall section (26A) adjacent to the opening (27) and a portion of the wall section (32) adjacent to the through hole (34) are held between the first section (102) and the at least one retaining portion (122).

16. The fastening unit according to claim 15, characterized in that, The at least one retaining portion (122) includes a first retaining portion (122A) and a second retaining portion (122B), wherein the first retaining portion (122A) forms a first angle (α) with the first direction (D1), the second retaining portion (122B) forms a second angle (β) with the first direction (D1), and the first angle (α) is smaller than the second angle (β).

17. The fastening unit according to claim 12, characterized in that, The fastener (100) includes two sidewalls (110) and two wings (112), wherein each wing (112) is connected to the top wall (108) through a corresponding sidewall (110), wherein the two sidewalls (110) are symmetrically arranged at opposite side edges of the top wall (108) and the two wings (112) are symmetrically arranged.

18. The fastening unit according to any one of claims 11 to 17, characterized in that, The first direction (D1) is approximately perpendicular to the second direction (D2).

19. A photovoltaic module, characterized in that, The photovoltaic module (1) includes a photovoltaic panel, a support structure (30), and a fastening unit (10) according to any one of claims 10 to 18, wherein the fastening unit (10) is used to fix the frame (20) of the photovoltaic panel to the support structure (30).

Images