Binding post sealing cover and upper cover assembly

Abstract

A binding post sealing cover can be processed through injection molding, and the side wall of the binding post sealing cover surrounds a top cover to form a semi-enclosed space; the bottom plate is arranged in the semi-enclosed space and is fixed on the side wall, so that a wiring fixing area and a clamping fixing area are formed in the semi-enclosed space; the side plate is arranged in the wiring fixing area and is fixed between the top cover and the bottom plate so as to form a wire plugging space; the bottom plate is provided with three or more guide connection holes which are communicated with the wiring fixing area and the clamping fixing area, and each wire plugging space is internally provided with a guide connection hole. Blind holes corresponding to the guide connection holes are formed in the inner side, located in the wiring fixing area, of the top cover, the axes of the blind holes coincide with the axes of the guide connection holes, and the shapes of the cross sections of the blind holes are the same as the shapes of the cross sections of the guide connection holes in the projection direction of the axes of the guide connection holes. In addition, the invention further provides an upper cover assembly. Compared with the prior art, the binding post sealing cover and the upper cover assembly do not need to be provided with auxiliary holes, the sealing performance is improved, meanwhile, the filling amount of sealant is reduced, and cost is saved.

Description

Technical Field

[0001] This invention relates to the field of sealing caps, and in particular to a terminal sealing cap and a top cover assembly. Background Technology

[0002] Compressors, as devices that convert low-pressure gas into high-pressure gas, are widely used in refrigeration equipment such as air conditioners and refrigerators. Compressors typically have terminals on their top for connection to an external power source. These terminals are usually connected using terminal clamps. If moisture or water seepage occurs at the connection point between the terminals and the external power source, it can lead to leakage or short circuits. Therefore, a high degree of sealing is required at this connection point, necessitating the use of a terminal sealing cap. During installation, the terminal sealing cap is fitted over the compressor's terminal mounting bracket to secure it to the top of the compressor.

[0003] Patent application number 201821344926.2 discloses a terminal block sealing cover 1 and a terminal block 2. Please refer to [link / reference]. Figure 1The terminal sealing cover 1 includes a top cover 11, a side wall 12, a bottom plate 13, and a side plate (not shown). The side wall 12 surrounds the top cover 11 and forms a semi-enclosed space with an opening on one side. The bottom plate 13 is disposed within the semi-enclosed space and fixed to the side wall 12. The side of the bottom plate 13 facing the top cover 11, the top cover 11, and the side wall 12 together form the wiring fixing area (not shown) to accommodate the terminal 2. The side of the bottom plate 13 facing away from the top cover 11 and the side wall 12 together form a locking fixing area (not shown) to fix the terminal sealing cover 1 to the terminal fixing seat (not shown) of the compressor. In the wiring fixing area, the side wall 12 has a line guide port 121 for the terminal 2 to be inserted into the wiring fixing area. The side plate is disposed within the wiring fixing area and fixed between the top cover 11 and the bottom plate 13. The base plate 13 is provided with a guide hole 131 connecting the wiring fixing area and the engagement fixing area. The compressor terminal (not shown) is inserted into the wiring fixing area through the guide hole 131 from the engagement fixing area. To prevent the terminal 2 from falling off, a limiting plate 100 is provided on the side of the top cover 11 facing the base plate 131. The limiting plate 100 extends from the line guide port 121 along the insertion direction of the terminal 2 on the top cover 11. The limiting plate 100 has a plate surface 101 facing the base plate 13 and a vertical surface 102 perpendicular to the top cover 11. The distance from the plate surface 101 of the limiting plate 100 to the top cover 11 gradually increases along the insertion direction of the terminal 2, that is, the limiting plate 100 is inclined towards the base plate 13. The vertical surface 102 is located at the end away from the line guide port 121 and connects the top cover 11 and the plate surface 101.

[0004] Furthermore, the terminal block sealing cap 1 is generally manufactured using injection molding technology. Due to the influence of the molding die, a process hole 122 needs to be opened on the side wall 12 to connect the wiring fixing area and the outside of the terminal block sealing cap, and the process hole 122 is directly opposite the circuit guide opening 121. Preferably, the extension direction of the process hole 122 is perpendicular to the vertical plane 102. During injection molding, two cores are inserted from the circuit guide opening 121 and the process hole 122 respectively, and the plane where the vertical plane 122 is located is used as the parting surface, and the direction perpendicular to the vertical plane 122 is used as the mold opening direction for molding. That is to say, the terminal block sealing cap 1 is formed by two cores with parallel mold opening directions.

[0005] Please see Figure 2The terminal 2, which mates with the terminal sealing cover 1, includes a main body 21, an elastic snap 22, and two opposing terminal pieces 23. The main body 21 has an upper end surface 211 and a lower end surface 212 that are parallel to each other. The two terminal pieces 23 are opposite to each other and connected between the upper end surface 211 and the lower end surface 212, forming a space for accommodating the terminal. The elastic snap 22 is made of elastic material and has a fixed end 221 and a movable end 222. The fixed end 221 is fixed to the upper end surface 211, and the movable end 222 rotates around the fixed end 221 to move away from or towards the upper end surface 211. When the terminal 2 is inserted into the wiring fixing area of ​​the terminal sealing cover 1, the lower end face 212 is in contact with the bottom plate 13 of the terminal sealing cover 1, the upper end face 211 faces the top cover 11 of the terminal sealing cover 1, the fixed end 221 is located on the side away from the line guide port 121, and the movable end 222 is located on the side close to the line guide port 121.

[0006] In use, the terminal block 2 is inserted into the terminal sealing cover 1 through the line guide port 121 until the movable end 222 passes through the vertical surface 102. The locking structure of the vertical surface 102, which holds the movable end 222, restricts the movement of the terminal block 2 toward the line guide port 121. Then, the terminal sealing cover 1 and the terminal block 2 are combined to form an upper cover assembly (not shown). The locking and fixing area of ​​the terminal sealing cover 1 is fitted onto the terminal block of the compressor, and the terminal block is located between the two terminal pieces 23. Finally, sealant is filled into the wiring fixing area, the process hole 122, and the connection between the terminal sealing cover 1 and the terminal fixing seat for sealing.

[0007] As can be seen from the above-mentioned terminal block sealing caps, in order to prevent the terminals from easily detaching from the sealing caps, existing technologies require a locking structure between the terminals and the sealing caps. However, existing locking structures often require process holes for the mold core during injection molding, and consequently, a large amount of sealant needs to be injected into these process holes. Insufficient sealant can negatively impact the sealing performance. Furthermore, the inclined limiting plate forms an angle with the upper surface of the terminal block, which can easily cause the terminal block to detach and may also result in incomplete sealant filling, further affecting the sealing performance. Summary of the Invention

[0008] Therefore, the purpose of this invention is to provide a terminal sealing cap that does not require process holes.

[0009] The technical solution adopted in this invention is as follows:

[0010] A terminal block sealing cap, which can be processed by injection molding, includes a top cover, a side wall, a bottom plate, and a side plate; the side wall surrounds one side of the top cover to form a semi-enclosed space; the bottom plate is disposed within the semi-enclosed space and fixed to the side wall, forming a wiring fixing area with the top cover and the side wall on the side of the bottom plate facing the top cover, and forming a locking fixing area with the side wall on the side of the bottom plate facing away from the top cover; the side plate is disposed within the wiring fixing area and fixed between the top cover and the bottom plate to form a wire insertion space; the bottom plate is provided with three or more guide holes communicating with the wiring fixing area and the locking fixing area, and each wire insertion space is provided with a guide hole; characterized in that the top cover, located inside the wiring fixing area, is provided with three or more blind holes corresponding to the guide holes, and the axis of the blind holes coincides with the axis of the guide holes.

[0011] The terminal sealing cap of this invention eliminates the need for process holes, improving sealing performance while reducing the amount of sealant required, thus saving costs. Furthermore, reducing the step of filling process holes with sealant improves production efficiency.

[0012] Furthermore, the top cover is located on the inner side of the wiring fixing area and is parallel to the base plate. When the wiring terminal is inserted into the terminal sealing cover, the gap between the top cover and the wiring terminal is uniform, which facilitates the filling of sealant and thus improves the sealing performance.

[0013] Furthermore, a wiring guide opening is provided on the side wall of the wiring fixing area; the top cover also has a limiting block protruding towards the base plate on the inner side of the wiring fixing area; the limiting block is disposed between the blind hole and the wiring guide opening. The limiting block can further prevent the wiring terminals from falling off.

[0014] Furthermore, it also includes a positioning plate disposed in the wiring fixing area, the positioning plate being connected between the top cover and the bottom plate, and the blind hole being located between the positioning plate and the line guide port. When the wiring terminal is inserted into the terminal sealing cover, the positioning plate positions the wiring terminal.

[0015] Furthermore, the axis of the guide hole is perpendicular to the base plate.

[0016] Furthermore, it includes at least two parallel side plates, with adjacent side plates forming a wiring space between the bottom plate and the top cover.

[0017] In addition, the present invention also provides a top cover assembly, the technical solution of which is as follows:

[0018] A top cover assembly includes the aforementioned terminal block sealing cover and terminal blocks;

[0019] The top of the terminal block is provided with an elastic buckle. When the terminal block slides in the insertion space, it can undergo compressive elastic deformation until the movable end of the elastic buckle is located in the blind hole.

[0020] Compared with the prior art, the wiring terminals in the top cover assembly of the present invention are not easy to fall off from the terminal sealing cover, and the terminal sealing cover does not require additional process holes, which can improve the sealing performance.

[0021] Furthermore, the terminal block also has an upper end face and a lower end face, and the elastic buckle is disposed on the upper end face; the distance from the top cover to the bottom plate is equal to the distance from the upper end face to the lower end face of the terminal block, and less than the distance from the movable end to the lower end face. When the terminal block is inserted into the terminal block sealing cover, it can be tightly connected with the terminal block sealing cover.

[0022] Furthermore, the side wall is provided with a line guide port communicating with the insertion space, and the terminal sealing cover also includes a positioning plate. The positioning plate is connected between the top cover and the bottom plate and is opposite to the line guide port. The blind hole is located between the positioning plate and the line guide port to facilitate the positioning of the terminal in the terminal sealing cover.

[0023] Furthermore, a limiting block protruding towards the base plate is provided on the inner side of the top cover; the limiting block is located between the blind hole and the line guide port; when the terminal block is connected to the positioning plate, the movable end of the elastic buckle can abut against the limiting block to ensure that a locking structure is formed between the terminal block sealing cover and the terminal block.

[0024] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the cross-sectional structure of a terminal block sealing cover in the prior art;

[0026] Figure 2 This is a schematic diagram of the structure of a terminal block in the prior art;

[0027] Figure 3 This is a schematic diagram of the overall structure of the terminal sealing cover in this invention;

[0028] Figure 4 This is a schematic diagram of the terminal sealing cover in this invention, viewed along section AA.

[0029] Figure 5 This is a schematic diagram of the upper cover assembly in this invention, viewed along section AA.

[0030] Figure 6This is a schematic diagram of the core assembly used for molding the terminal block sealing cap in this invention;

[0031] Figure 7 This is a schematic diagram of the installation of the core assembly in this invention;

[0032] Figure 8 This is a schematic diagram of the mold structure viewed along section AA in this invention. Detailed Implementation

[0033] Please refer to the following: Figure 3 and Figure 4 The terminal block sealing cover 1 of the present invention includes a top cover 11, a side wall 12, a bottom plate 13, and a side plate 14. The side wall 12 surrounds the top cover 11 and forms a semi-enclosed space with an opening on one side. The bottom plate 13 is disposed within the semi-enclosed space and fixed to the side wall 12. The side of the bottom plate 13 facing the top cover 11, the top cover 11, and the side wall 12 together form the wiring fixing area (not shown) to accommodate the terminal block 2. The side of the bottom plate 13 facing away from the top cover 11, together with the side wall 12, forms a locking fixing area (not shown) to fix the terminal block sealing cover 1 to the terminal block mounting base (not shown) of the compressor. In the wiring fixing area, the side wall 12 has a wiring guide opening 121 for the terminal block 2 to be inserted into the wiring fixing area. The side plate 14 is disposed within the wiring fixing area and fixed between the top cover 11 and the bottom plate 13. The base plate 13 has a guide hole 131 connecting the wiring fixing area and the engagement fixing area. The compressor terminal (not shown) is inserted into the wiring fixing area through the guide hole 131 from the engagement fixing area. The top cover 11 has a blind hole 111 on the inner side of the wiring fixing area, with its opening facing the base plate 13. The axis of the blind hole 111 coincides with that of the guide hole 131, and the cross-sectional shape of the blind hole 111 is the same as that of the guide hole 131 along the direction of its projection. After the terminal is inserted into the terminal sealing cover 1, the terminal is located in the blind hole 111. Preferably, the axes of the terminal and the blind hole 111 are both perpendicular to the base plate 13.

[0034] Furthermore, there are two or more side plates 14, with multiple parallel side plates 14 connected between the base plate 13 and the top cover 11. Adjacent side plates 14, the base plate 13, and the top cover 11 together form a wiring space. Each wiring space is provided with a guide hole and a corresponding blind hole, thereby dividing the wiring fixing area into multiple wiring spaces according to the number of terminals. In this embodiment, the number of terminals on the terminal fixing seat is three, and the wiring fixing area is divided into three wiring spaces by two side plates 14. Correspondingly, each wiring space is provided with a blind hole 111 and a guide hole 131, that is, the number of blind holes 111 and guide holes 131 are both three.

[0035] Furthermore, to ensure better contact between the upper end face 211 of the terminal 2 and the terminal sealing cover 1, the top cover 11 is located on the inner side of the wiring fixing area and parallel to the base plate 13. Preferably, the distance from the top cover 11 to the base plate 13 is equal to the distance from the upper end face 211 to the lower end face 212 of the terminal 2, and less than the distance from the movable end 222 to the lower end face 212. After the terminal 2 is inserted into the terminal sealing cover 1, the upper end face 211 and the lower end face 212 of the terminal are respectively in contact with the top cover 11 and the base plate 13 to prevent the terminal 2 from falling off.

[0036] Furthermore, the top cover 11 is provided with a limiting block 112 protruding towards the base plate 13 on the inner side of the wiring fixing area. The limiting block 112 is located between the blind hole 111 and the line guide port 121. When the terminal 2 is inserted into the terminal sealing cover 1 from the line guide port 121, the elastic buckle 22 of the terminal 2 slides in along the top cover 11. When it reaches the limiting block 112, it is compressed and elastically deformed. After passing through the limiting block 112, the elastic buckle 22 returns to its original shape. The limiting block 112 abuts against the movable end 222 of the elastic buckle 22, thereby restricting the terminal 2 from moving towards the line guide port 121. The movable end 222 cooperates with the limiting block 112 located on the inner side of the top cover 11 to form a buckle structure to further prevent the terminal 2 from falling off.

[0037] Furthermore, to better position the terminal block 2 when it is inserted, the terminal block sealing cover 1 also includes a positioning plate 15. The positioning plate 15 is connected between the top cover 11 and the bottom plate 13, and the blind hole 111 is located between the positioning plate 15 and the line guide port 121. When the terminal block 2 is inserted into the terminal block sealing cover 1, and the side of the terminal block 2 facing the line guide port 121 presses against the positioning plate 15, the fixed end 221 of the terminal block is located on one side of the positioning plate 15, and the movable end 222 is located in the blind hole 111, thereby achieving the positioning of the terminal block 2.

[0038] Please see Figure 5 The present invention also provides a top cover assembly 3, which includes the terminal sealing cover 1 described above and the terminal 2. The terminal 2 is inserted into the wiring fixing area through the wiring guide port 121 of the terminal sealing cover 1. The fixed end 221 of the terminal 2 is located on the side away from the wiring guide port 121, and its movable end 222 is located on the side close to the wiring guide port 121. The terminal 2 is pushed away from the wiring guide port 121 until the side of the terminal 2 away from the wiring guide port 121 abuts against the positioning plate 15. During the movement of the terminal 2, the movable end 222 of the elastic buckle 21 passes through the limiting block 112 and undergoes elastic deformation. After entering the blind hole 111, it returns to its original shape. The limiting block 112 abuts against the movable end 222 of the elastic buckle 22, thereby restricting the movement of the terminal 2 toward the wiring guide port 121 and preventing the terminal 2 from falling off the terminal sealing cover 1. The locking area of ​​the terminal sealing cover 1 faces the terminal fixing seat on the compressor, and the upper cover assembly 3 is sleeved onto the terminal fixing seat. The terminal is inserted into the terminal fixing area through the guide hole 131 and is held tightly by the two connecting pieces 22 of the terminal 2. Finally, sealant is filled into the line guide opening 121 and the joint between the terminal sealing cover 1 and the terminal fixing seat to achieve a seal. Since the distance between the upper side 211 and the top cover 11 is small, only a small amount of sealant is needed to achieve a seal. Moreover, since the distance between the upper side 211 of the terminal 2 and the top cover 11 is relatively uniform, the sealant is evenly distributed between the terminal and the top cover 11, making it less likely to create gaps, thereby improving the sealing performance.

[0039] To achieve the production of the aforementioned terminal block sealing cap 1, the present invention also provides a molding method for the terminal block sealing cap. This molding method eliminates the need for process holes 122 on the terminal block sealing cap 1. The molding invention utilizes the guide hole 131 of the terminal block sealing cap 1 and achieves this through two cores with non-parallel mold opening directions, wherein the mold opening direction of one of the cores is parallel to the axis of the guide hole.

[0040] Specifically, please refer to the following: Figures 6 to 8 The molding method of the terminal sealing cap of the present invention is achieved by setting a terminal sealing cap mold. The mold includes a cavity (not shown) and a core assembly 4. The core assembly 4 includes a first core 41 and a second core 42 whose mold opening directions are not parallel to each other. Specifically, it includes the following steps:

[0041] Step S10: Set the first core 41. The first core 41 includes a molding base 411, a molding post 412, and a cover molding block 413. The molding post 412 extends on the first end face 4111 of the molding base 411, and the mold opening direction of the first core 41 is parallel to the extension direction of the molding post 412. Preferably, the axis of the molding post 412 is perpendicular to the first end face 4111. The cover molding block 413 is a protrusion fixed on the first end face 4111, and its second end face 4131, away from the molding base 411, is parallel to the first end face 4111. The height of the cover molding block 413 relative to the first end face 4111 is less than the height of the molding post 412 relative to the first end face 4111, and the cover molding block 413 surrounds the molding post 412 on three sides.

[0042] Step S20: Set the second core 42. The second core 42 includes a wire insertion space forming block 421 and a through hole 422, and the mold opening direction of the second core 42 is not parallel to the axis of the through hole 422; preferably, the mold opening direction of the second core 42 is perpendicular to the axis of the through hole 422. The extension direction of the wire insertion space forming block 421 is the same as the insertion direction of the terminal 2, thereby forming the wire insertion space. The through hole 422 is a through hole provided on the wire insertion space forming block 421, and the cross-sectional shape of the through hole 422 projected along the axis of the through hole 422 is the same as the cross-sectional shape of the forming column 412 projected along the axis of the forming column 412. Preferably, in the insertion space forming block 421, the third end face 4211 and the fourth end face 4212 through the through hole 422 are parallel to each other; further, the third end face 4211 and the fourth end face 4212 are both parallel to the first end face 4111.

[0043] Step S30: The forming post 412 of the first core 41 is inserted into the through hole 422 of the second core 42 to form the core assembly 4. In the wire insertion space forming block 421, three of the four end faces connected between the third end face 4211 and the fourth end face 4212 are in contact with the cover forming block 413, and the other end face is located outside the forming seat 411, which is called the outer end face 4213; preferably, the outer end face 4213 is perpendicular to the first end face 4111.

[0044] Step S40: The core assembly 4 is placed into a cavity (not shown) that mates with it for injection molding of the terminal sealing cap 1. Under the support of the cavity, a gap is formed between the insertion space molding block 421 and the molding seat 411, and the molding post 412 passes through the through hole 422 and protrudes outside the insertion space molding block 421. In the insertion space molding block 421, the third end face 4211 is away from the molding seat 411; preferably, the distance from the third end face 4211 to the first end face 4111 is equal to the distance from the second end face 4131 to the first end face 4111.

[0045] When the second core 42 is inserted into the first core 41, the insertion space forming block 421, the forming seat 411, the cover forming block 413, and the cavity together form the top cover 11, the side wall 12, and the side plate 14 of the terminal sealing cover 1; the gap between the insertion space forming block 421 and the forming seat 411, together with the cavity, forms the bottom plate 13. Since the forming post 412 is disposed on the forming seat 411 and passes through and is exposed outside the insertion space forming block 421, that is, the forming post 412 passes through the bottom plate 13 and is inserted into the top cover 11, thereby forming a coaxial guide hole 131 and a blind hole 111 on the bottom plate 131 and the top cover 11, respectively.

[0046] Furthermore, in step S30, after the core assembly 4 is formed, the end face of the insertion space forming block 421 that is parallel to and directly opposite the outer end face 4213 is the inner end face 4214. The through hole 422 is located between the outer end face 4213 and the inner end face 4214, and a gap is provided between the inner end face 4214 and the cover forming block 413 to form the positioning plate 15.

[0047] In this embodiment, a corresponding forming post 412 and a wire insertion space forming block 421 are set according to the number and position of the terminals; the axis of the forming post 412 is perpendicular to the end face 4111; after the core group 4 is formed, the third end face 4211 and the fourth end face 4212 are both parallel to the first end face 4111; the inner end face 4214 is perpendicular to the first end face 4111.

[0048] Step S50: After the terminal sealing cover 1 is injection molded, the first core 41 moves away from the terminal sealing cover 1 along the axial direction of the molded post 412.

[0049] Step S60: After the first core 41 moves away from the terminal sealing cover 1, the second core 42 moves away from the terminal sealing cover 1 in a direction parallel to the first end face 4111; the terminal sealing cover 1 is demolded.

[0050] In other words, during injection molding, the mold opening directions of the first core 41 and the second core 42 are not parallel to each other. Furthermore, based on the relationship between the insertion direction of the terminal 2 and the position of the terminal block, the angle between the mold opening directions of the first core 41 and the second core 42 is set to any value between 0 degrees and 90 degrees, thereby allowing the terminal 2 to be inserted into the terminal block sealing cap 1 at different angles.

[0051] Compared to existing technologies, the terminal block sealing cap of the present invention eliminates the need for a process port, improving sealing performance while reducing the amount of sealant required, thus saving costs. Furthermore, reducing the step of filling the process port with sealant improves production efficiency. In addition, the end face of the sealing cap in the upper cover assembly of the present invention fits tightly against the terminal block and is equipped with a snap-fit ​​structure, making it difficult for the terminal block to detach. Moreover, the molding method of the terminal block sealing cap of the present invention enables the injection molding production of the aforementioned terminal block sealing cap.

[0052] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A terminal sealing cap, which can be processed by injection molding, includes a top cover, a side wall, a bottom plate, and a side plate; the side wall surrounds one side of the top cover to form a semi-enclosed space; the bottom plate is disposed within the semi-enclosed space and fixed to the side wall, the side of the bottom plate facing the top cover forms a wiring fixing area with the top cover and the side wall, and the side of the bottom plate facing away from the top cover forms a locking fixing area with the side wall; the side plate is disposed within the wiring fixing area and fixed between the top cover and the bottom plate to form a wire insertion space; the bottom plate is provided with three or more guide holes communicating with the wiring fixing area and the locking fixing area, and each wire insertion space is provided with a guide hole; characterized in that, The top cover has a blind hole corresponding to the guide hole on the inner side of the wiring fixing area. The axis of the blind hole coincides with the axis of the guide hole, and the cross-sectional shape of the blind hole is the same as the cross-sectional shape of the guide hole along the direction of projection of the axis of the guide hole.

2. The terminal block sealing cap according to claim 1, characterized in that, The top cover is located on the inner side of the wiring fixing area and is parallel to the bottom plate.

3. The terminal block sealing cap according to claim 2, characterized in that, A line guide port is provided on the side wall of the wiring fixing area; a limiting block protruding towards the base plate is also provided on the inner side of the top cover of the wiring fixing area; the limiting block is located between the blind hole and the line guide port.

4. The terminal block sealing cap according to claim 3, characterized in that, It also includes a positioning plate disposed in the wiring fixing area, the positioning plate being connected between the top cover and the bottom plate, and the blind hole being located between the positioning plate and the line guide port.

5. The terminal block sealing cap according to claim 4, characterized in that, The axis of the guide hole is perpendicular to the base plate.

6. The terminal block sealing cap according to claim 5, characterized in that, It includes at least two parallel side plates, with adjacent side plates forming the wiring space between the bottom plate and the top cover.

7. A top cover assembly, characterized in that: Includes the terminal block sealing cap and terminal block as described in claim 1; The top of the terminal block is provided with an elastic buckle. When the terminal block slides in the insertion space, it can undergo compressive elastic deformation until the movable end of the elastic buckle is located in the blind hole.

8. The top cover assembly according to claim 7, characterized in that: The terminal block also has an upper end face and a lower end face, and the elastic buckle is disposed on the upper end face; the distance from the top cover to the bottom plate is equal to the distance from the upper end face to the lower end face of the terminal block, and is less than the distance from the movable end to the lower end face.

9. The upper cover assembly according to claim 7, characterized in that: The side wall is provided with a line guide port that communicates with the insertion space. The terminal sealing cover also includes a positioning plate. The positioning plate is connected between the top cover and the bottom plate and is opposite to the line guide port. The blind hole is located between the positioning plate and the line guide port.

10. The cover assembly according to claim 9, characterized in that: The inner side of the top cover is also provided with a limiting block that protrudes towards the bottom plate; the limiting block is located between the blind hole and the line guide port; when the wiring terminal is connected to the positioning plate, the movable end of the elastic buckle can abut against the limiting block.

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