Terminal plug, wiring terminal and photovoltaic inverter

Abstract

The utility model discloses a terminal plug, a wiring terminal and a photovoltaic inverter. The terminal plug is used for plugging a first wiring end of the wiring terminal, the first wiring end comprises a wiring part and a locking part, the terminal plug comprises a main body, the main body is provided with a plugging blind hole and a buckling part, the plugging blind hole is used for plugging the wiring part, and the buckling part is used for buckling the wiring part. And the buckling part is used for being matched with the locking part so as to lock the main body on the first terminal stud. According to the terminal plug, the wiring terminal and the photovoltaic inverter provided by the utility model, the problem that a plug used for plugging the first wiring terminal is easy to fall off in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment, and in particular to a terminal plug, a wiring terminal and a photovoltaic inverter. Background Art

[0002] Photovoltaic inverter (PV inverter or solar inverter) is an inverter that can convert the variable DC voltage generated by photovoltaic (PV) solar panels into AC power at the mains frequency, which can be fed back to the commercial power transmission system or used for off-grid power grids. Photovoltaic inverter is one of the important system balance (BOS) in photovoltaic array systems and can be used with general AC-powered equipment.

[0003] The housing of the photovoltaic inverter is equipped with many terminals for connecting wires. The terminals include a male plug and a female plug. When leaving the factory, the female plug is usually assembled and fixed on the housing of the photovoltaic inverter, while the male plug is usually separated from the female plug when leaving the factory. In actual use, the user can connect the male plug that matches a part or all of the female plugs to the female plug according to the use requirements.

[0004] However, photovoltaic inverters are usually equipped with many female plugs. When the female plug is not connected to the male plug, a plug is usually used to seal the female plug to prevent dust and reduce safety hazards. The existing plug is a columnar structure, which is usually fixed to the female plug by interference fit. In this structure, the plug is easy to fall off due to aging or external force, which is difficult to meet the use requirements of photovoltaic inverters. Utility Model Content

[0005] The main purpose of the utility model is to provide a terminal plug, a wiring terminal and a photovoltaic inverter, so as to solve the problem that the plug used for sealing the female plug in the prior art is easy to fall off.

[0006] According to one aspect of the utility model, a terminal plug is provided, the terminal plug is used to seal a first connection terminal of a connection terminal, the first connection terminal includes a connection portion and a locking portion, and the terminal plug includes:

[0007] The main body is provided with a plug-in blind hole and a buckle portion, the plug-in blind hole is used to be plugged with the wiring portion, and the buckle portion is used to cooperate with the locking portion to lock the main body on the first wiring terminal.

[0008] Furthermore, one of the locking portion and the buckling portion is a buckle, and the other is a hook matched with the buckle.

[0009] Further, the buckle portion includes a buckle, which includes a plug-in hole section and a locking step, the plug-in hole section extends from the first end of the main body in a direction parallel to the axis of the plug-in blind hole, and the locking step is arranged at an end of the plug-in hole section away from the first end, and the first end is the same as the end where the port of the plug-in blind hole is located.

[0010] Furthermore, a first through hole is provided on the main body, the first through hole is staggered with the plug-in blind hole, and extends in a direction perpendicular to the axis of the plug-in blind hole, and the first through hole is connected to an end of the plug-in hole section away from the first end so that the inner wall surface of the first through hole forms the locking step.

[0011] Furthermore, the locking portion includes at least two hooks, at least two of which are spaced apart along the periphery of the wiring portion, and the buckling portion includes at least two buckles, at least two of which are spaced apart along the periphery of the plug-in blind hole, and at least two of the buckles are arranged one-to-one with at least two of the buckles.

[0012] Furthermore, there are two hooks, which are respectively arranged on two opposite sides of the wiring portion, and there is a predetermined distance between each hook and the wiring portion;

[0013] There are two buckles, which are respectively arranged on two opposite sides of the plug-in blind hole to be used for respectively cooperating with the two hooks.

[0014] Furthermore, a disassembly portion is provided on the main body, and the disassembly portion is provided at the second end of the main body, and the second end is an end of the main body away from the opening of the plug-in blind hole.

[0015] Furthermore, the disassembly portion comprises a disassembly end plate, the disassembly end plate has a disassembly section protruding from an outer edge of the main body, and the disassembly section is provided with a through hole.

[0016] On the other hand, the utility model further provides a wiring terminal, which includes the above-mentioned terminal plug.

[0017] In a third aspect, the utility model further provides a photovoltaic inverter, which includes the above-mentioned connection terminal.

[0018] In the present utility model, when the terminal plug in the present utility model is used to seal the first wiring terminal, it is only necessary to insert the wiring part of the first wiring terminal into the plug-in blind hole, and make the buckle part and the lock part cooperate and connect, so that the main body of the terminal plug can be locked on the first wiring terminal. After the terminal plug in the present utility model is installed, the plug-in blind hole on the terminal plug can seal the wiring part, and the buckle part and the lock part are fixedly connected. Even if the terminal plug is aged or hit, it is not easy to fall off from the first wiring terminal. Compared with the plug in the prior art that is fixedly connected to the first wiring terminal by interference fit, the terminal plug in the utility model can not only well seal the wiring part of the first wiring terminal, but also is not easy to fall off. It is safer and more reliable when used, and can reduce the potential safety hazards during the use of the wiring terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 A three-dimensional structural diagram of a terminal plug disclosed in one embodiment of the utility model;

[0021] Figure 2 A cross-sectional view of a terminal plug disclosed in one embodiment of the utility model;

[0022] Figure 3 A three-dimensional structural diagram of a terminal plug disclosed in one embodiment of the utility model when installed on a first wiring terminal;

[0023] Figure 4 A three-dimensional structural diagram of a first wiring terminal disclosed in an embodiment of the utility model;

[0024] Figure 5 A three-dimensional structural diagram of a terminal plug disclosed in another embodiment of the utility model when it is installed on a first wiring terminal and is at a first viewing angle;

[0025] Figure 6 A front view of a terminal plug disclosed in another embodiment of the utility model when it is installed on a first wiring terminal and is at a second viewing angle;

[0026] Figure 7 A front view of a terminal plug disclosed in another embodiment of the utility model when installed on a first wiring terminal;

[0027] Figure 8A cross-sectional view of a terminal plug disclosed in another embodiment of the utility model when installed on a first wiring terminal;

[0028] Fig. 9 This is a three-dimensional structural diagram of a terminal plug disclosed in another embodiment of the utility model.

[0029] The above drawings include the following reference numerals:

[0030] 1. Terminal plug; 10. Main body; 101. First end; 102. Second end; 11. Plug blind hole; 12. Buckle portion; 121. Plug hole section; 122. Stop step; 123. First through hole; 13. Disassembly portion; 131. Disassembly section; 132. Through hole; 2. First wiring terminal; 20. Wiring portion; 21. Locking portion; 211. Extension section; 212. Hook block; 2121. Guide slope. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] As mentioned in the background technology, the plug used in the prior art to seal the connection terminal, such as the female plug, installed on the inverter is easy to fall off. To this end, the utility model provides a new terminal plug, which can seal the first connection terminal and is not easy to fall off. The terminal plug of the utility model will be described in detail below in conjunction with the accompanying drawings.

[0035] See also Figures 1 to 9 As shown, according to an embodiment of the utility model, a terminal plug 1 is provided, which is used to plug the first wiring terminal 2 of the wiring terminal. The first wiring terminal 2 here can be a female plug or a male plug. Figure 3 to Figure 4 FIG. 2 shows the situation when the first wiring terminal 2 is a male plug. Figures 5 to 9 The figure shows the case where the first wiring terminal 2 is a female plug. The first wiring terminal 2 includes a wiring portion 20 and a locking portion 21. The wiring portion 20 is used to connect the wire, and the locking portion 21 is usually used to snap-fit ​​with the second wiring terminal (not shown in the figure) to achieve the connection between the first wiring terminal 2 and the second wiring terminal.

[0036] like Figure 1 As shown, the terminal plug in this embodiment includes a main body 10, on which a plug-in blind hole 11 and a buckle portion 12 are provided. The plug-in blind hole 11 is used to be plugged with the wiring portion 20, and the buckle portion 12 is used to cooperate with the locking portion 21 to lock the main body 10 on the first wiring terminal 2.

[0037] Combination Figures 1 to 9 As shown, when the terminal plug 1 in this embodiment is used to plug the first wiring terminal 2, it is only necessary to insert the wiring portion 20 of the first wiring terminal 2 into the plug blind hole 11, and make the buckle portion 12 cooperate with the lock portion 21 to lock the main body 10 of the terminal plug 1 on the first wiring terminal 2. After the terminal plug 1 in this embodiment is installed, the plug blind hole 11 on the terminal plug 1 can plug the wiring portion 20, and the buckle portion 12 is fixedly connected with the lock portion 21. Even if the terminal plug 1 is aged or hit, it is not easy to fall off from the first wiring terminal 2.

[0038] It should be noted that when the first wiring terminal 2 is set as a male plug, the wiring portion 20 is a wiring post (such as Figure 3 and Figure 4 When the second wiring terminal 2 is set as a female plug, the wiring portion 20 is a wiring hole (as shown); Figures 5 to 8 shown).

[0039] Compared with the plug in the prior art which is fixedly connected to the first wiring terminal by interference fit, the terminal plug 1 in this embodiment can not only seal the wiring portion 20 of the first wiring terminal 2 well, but is also not prone to falling off. It is safer and more reliable to use and can reduce safety hazards during the use of the wiring terminal.

[0040] like Figure 1 , Figure 8 as well as Fig. 9 As shown, the main body 10 in this embodiment is a columnar structure, and the above-mentioned plug-in blind hole 11 is arranged on the axis of the columnar structure. After the terminal plug 1 is installed on the first wiring terminal 2, the plug-in blind hole 11 can block the wiring part 20, which can play a good role in dust prevention and reducing safety hazards. The columnar structure in this embodiment can be cylindrical, elliptical, prism, other special-shaped columns or other special-shaped bodies, etc. Figure 1 FIG. 2 shows a case where the main body 10 is arranged in a special-shaped column (i.e., a column with an irregular cross section). Figure 8 and Fig. 9 2 shows the case where the main body 10 is arranged in a cylindrical shape.

[0041] In the present invention, one of the locking portion 21 and the buckle portion 12 is a buckle, and the other is a hook that matches the buckle. That is, when the locking portion 21 is set as a buckle, the buckle portion 12 is set as a hook (such as Figures 8 to 9 When the locking portion 21 is set as a hook, the buckle portion 12 is set as a buckle (as shown); Figures 1 to 4 The utility model can stably connect the terminal plug 1 to the first wiring terminal 2 of the wiring terminal through the buckle-to-buckle matching connection.

[0042] At the same time, in this embodiment, the locking portion 21 used to cooperate with the terminal plug 1 is a structure of the first wiring terminal 2 originally used to cooperate with the second wiring terminal. That is to say, the terminal plug 1 in this embodiment combines the structural characteristics of the first wiring terminal 2 itself, and is designed to be a terminal plug 1 that can be stably connected to the first wiring terminal 2, which has a simple structure and is stable and reliable.

[0043] like Figures 1 to 4As shown, the buckle portion 12 includes a buckle, and correspondingly, the locking portion 21 is a hook that matches the buckle. The buckle includes a plug-in hole section 121 and a locking step 122, wherein the plug-in hole section 121 extends from the first end 101 of the main body 10 in a direction parallel to the axis of the plug-in blind hole 11, and the locking step 122 is arranged at the end of the plug-in hole section 121 away from the first end 101, wherein the first end 101 mentioned here is the same as the end where the port of the plug-in blind hole 11 is located. With such a configuration, when installing the terminal plug 1, it is only necessary to align the wiring portion 20 with the plug-in blind hole 11, and make the hook face the buckle, and then press the terminal plug 1 so that the hook slides along the plug-in hole section 121 and matches with the locking step 122. The structure is simple and easy to install. In order to match with the buckle portion 12, the hook in this embodiment includes an extension section 211 and a hook block 212. One end of the extension section 211 is connected to the first wiring terminal 2, and the other end is provided with the hook block 212 mentioned above. The hook block 212 protrudes from the outer edge of the extension section 211. In order to allow the hook block 212 to pass through, the cross section of the plug blind hole 11 in this embodiment is not less than the maximum cross section of the hook block 212. The end of the hook block 212 can be provided with a guide slope 2121 to facilitate insertion into the plug hole section 121. During the process of inserting the hook into the plug hole section 121, the hook block 212 is deformed toward the direction close to the wiring portion 20 by the push force applied by the inner wall of the plug hole section 121, and slides along the depth direction of the plug hole section 121. When the hook block 212 slides out of the other end of the plug hole section 212, the resistance force applied by the plug hole section 121 to the hook block 212 is 0. At this time, the hook block 212 is reset and hooked on the locking step 122 under the drive of the extension section 211, thereby completing the locking of the terminal plug 1. The structure is simple and the operation is convenient.

[0044] Furthermore, the main body 10 in this embodiment is provided with a first through hole 123, which is staggered with the plug blind hole 11, and the extension direction of the first through hole 123 is perpendicular to the axis of the plug blind hole 11, and the first through hole 123 is connected with the end of the plug hole section 121 away from the first end 101 so that the inner wall surface of the first through hole 123 forms the above-mentioned stop step 122. In other words, the first through hole 123 in this embodiment is not connected with the plug blind hole 11. Specifically, the first through hole 123 is located outside the plug blind hole 11, so that dust and the like can be prevented from entering the plug blind hole 11 from the first through hole 123. At the same time, through the function of the first through hole 123, it is convenient to form the stop step 122 at the end of the plug hole section 121 away from the first end 101, so as to cooperate with the hook to achieve a good limiting effect.

[0045] After the terminal plug 1 is installed, the extension section 211 is located in the plug hole section 121, and the hook block 212 is located in the first through hole 123. The overall appearance of the terminal plug 1 and the first wiring terminal 2 that are matched together does not have too many ridges, and is not easily hooked by external structures. The structure is more stable and reliable, and can further reduce the safety hazards of the wiring terminal. Of course, in other embodiments of the utility model, in order to be able to process a locking step 122 that matches the hook on the terminal plug 1, a groove can also be processed on the main body 10 (the depth direction of the groove extends in the radial direction of the plug blind hole 11), and the side wall of the groove is connected to the plug hole section 121, and then the above-mentioned locking step 122 is formed on the side wall of the plug hole section 121. As long as it is other deformation methods based on the conception of the utility model, they are all within the protection scope of the utility model.

[0046] Compared with the method of machining a groove on the main body 10 to form the locking step 122, the method of machining the first through hole 123 and forming the above-mentioned locking step 122 on the inner wall of the first through hole 123 is less likely to destroy the structural strength of the entire main body 10, and can improve the service life of the terminal plug 1 in this embodiment to a certain extent.

[0047] In this embodiment, the locking portion 21 includes at least two hooks, which are arranged at intervals along the outer periphery of the wiring portion 20, and the buckling portion 12 includes at least two buckles, which are arranged at intervals along the outer periphery of the plug-in blind hole 11, and at least two buckles are arranged one-to-one with at least two buckles, so as to stably fix the terminal plug 1 on the first wiring terminal 2.

[0048] For example, in a specific embodiment of the present invention, two hooks are provided, and the two hooks are respectively provided on opposite sides of the wiring portion 20, and there is a predetermined spacing between each hook and the wiring portion 20, so as to facilitate insertion into the buckle; correspondingly, two buckles are provided, and the two buckles are respectively provided on opposite sides of the plug-in blind hole 11 for respectively cooperating with the two hooks for connection, and the structure is simple, and it is convenient for installation and use. Of course, in other embodiments of the present invention, the hooks and buckles can also be provided in three, four or more than four forms, and any other deformation methods under the conception of the present invention are within the protection scope of the present invention.

[0049] Combination Figures 1 to 3 As shown, the main body 10 in this embodiment is provided with a disassembly portion 13, and the disassembly portion 13 is provided at the second end 102 of the main body 10, and the second end 102 is an end of the main body 10 away from the opening of the plug blind hole 11. The disassembly portion 13 in this embodiment is provided at the second end 102 of the main body 10, and the terminal plug 1 is conveniently disassembled from the first wiring terminal 2 through the function of the disassembly portion 13.

[0050] Optionally, the disassembly portion 13 in this embodiment includes a disassembly end plate, which has a disassembly section 131 protruding from the outer edge of the main body 10. Since the disassembly portion 13 in this embodiment has the disassembly section 131 protruding from the outer edge of the main body 10, it is convenient to apply an external force to the terminal plug 1 through the action of the disassembly section 131, so that the terminal plug 1 can be disassembled from the first wiring terminal 2. The disassembly end plate in this embodiment is integrally formed with the main body 10, and has high structural strength and better stability.

[0051] Optionally, a second through hole 132 is provided on the disassembly section 131 in the present embodiment. In the utility model, by providing the second through hole 132 on the disassembly section 131, an auxiliary tool or the like can be inserted into the second through hole 132 when the terminal plug 1 is actually disassembled, so that an external force can be more conveniently applied to the terminal plug 1 to remove the terminal plug 1 from the first terminal 2.

[0052] Combination Figures 2 to 3 , Figures 5 to 9 As shown, the disassembly section 131 in this embodiment is a semicircular lug structure, and the outer peripheral surface of the semicircular lug structure has no sharp edges, which is not easy to cause damage to the user's hands.

[0053] During the actual processing, by designing the thickness of the disassembly portion 13 along the axial direction of the blind hole 11, the length dimension of the terminal block can be controlled. When the thickness of the disassembly portion 13 along the axial direction of the blind hole 11 is designed to be relatively thin and the disassembly terminal is installed on the first terminal head 2, it is not easy to increase the length dimension of the terminal block 20, which makes it easier to package the terminal block having the terminal plug 1 and the device having the terminal block.

[0054] On the other hand, the utility model also provides a wiring terminal, which includes the terminal plug 1 in the above embodiment. Therefore, the wiring terminal includes all the technical effects of the terminal plug in the above embodiment. Since the technical effects of the terminal plug 1 have been described in detail above, they will not be repeated here.

[0055] In a third aspect, the utility model further provides a photovoltaic inverter, which includes the wiring terminal in the above embodiment. Therefore, all technical effects of the photovoltaic inverter including the wiring terminal in the above embodiment are not repeated here.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A terminal plug, the terminal plug (1) is used to seal a first connection terminal (2) of a connection terminal, the first connection terminal (2) comprising a connection portion (20) and a locking portion (21), characterized in that: The terminal plug comprises: A main body (10) is provided with a plug-in blind hole (11) and a buckle portion (12), wherein the plug-in blind hole (11) is used for plugging with the wiring portion (20), and the buckle portion (12) is used for cooperating with the locking portion (21) to lock the main body (10) on the first wiring terminal (2).

2. The terminal plug according to claim 1, characterized in that: One of the locking portion (21) and the buckling portion (12) is a buckle, and the other is a hook matched with the buckle.

3. The terminal plug according to claim 2, characterized in that: The buckle portion (12) comprises a buckle, and the buckle comprises a plug-in hole section (121) and a locking step (122), wherein the plug-in hole section (121) extends from the first end (101) of the main body (10) in a direction parallel to the axis of the plug-in blind hole (11), and the locking step (122) is arranged at an end of the plug-in hole section (121) away from the first end (101), and the first end (101) is the same as an end where a port of the plug-in blind hole (11) is located.

4. The terminal plug according to claim 3, characterized in that: The main body (10) is provided with a first through hole (123), the first through hole (123) is staggered with the plug-in blind hole (11), and extends in a direction perpendicular to the axis of the plug-in blind hole (11), and the first through hole (123) is connected with an end of the plug-in hole section (121) away from the first end (101) so that the inner wall surface of the first through hole (123) forms the locking step (122).

5. The terminal plug according to claim 1, characterized in that: The locking portion (21) comprises at least two hooks, and the at least two hooks are arranged at intervals along the outer periphery of the wiring portion (20); the buckling portion (12) comprises at least two buckles, and the at least two buckles are arranged at intervals along the outer periphery of the plug-in blind hole (11), and the at least two buckles are arranged in a one-to-one correspondence with the at least two buckles.

6. The terminal plug according to claim 5, characterized in that: There are two hooks, which are respectively arranged on two opposite sides of the wiring portion (20), and there is a predetermined distance between each hook and the wiring portion (20); There are two buckles, which are respectively arranged on two opposite sides of the plug-in blind hole (11) to be used for respectively cooperating with the two hooks.

7. The terminal plug according to any one of claims 1 to 6, characterized in that: The main body (10) is provided with a disassembly portion (13), and the disassembly portion (13) is arranged at a second end (102) of the main body (10), and the second end (102) is an end of the main body (10) facing away from the opening of the plug-in blind hole (11).

8. The terminal plug according to claim 7, characterized in that: The disassembly portion (13) comprises a disassembly end plate, the disassembly end plate having a disassembly section (131) protruding from the outer edge of the main body (10), and a second through hole (132) is provided on the disassembly section (131).

9. A terminal block, characterized in that: The connecting terminal comprises a terminal plug (1) according to any one of claims 1 to 8.

10. A photovoltaic inverter, characterized in that: The photovoltaic inverter comprises the connection terminal according to claim 9.

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