Plastic shell base and power distribution device
By designing the interference fit between the limit column and the screw hole on the base of the plastic shell distribution device, the problem of loosening of the screw in the vibrating environment is solved, and the stable fixation of the screw is achieved.
Patent Information
- Application Number
- CN202420903277.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The screws of existing plastic case distribution devices are prone to loosening in vibrating environments, resulting in unstable fixation.
A plastic case base is designed, using limiting posts on the base plate to fit into the screw holes and hold the screws through the limiting posts to provide limiting action to ensure the stability of the screws.
Effectively prevent the screw from loosening in the vibration environment, ensure the stability of the screw, and improve the problem of easy loosening of the screw in the prior art.
Smart Images
Figure CN222826856U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power distribution equipment, in particular to a plastic shell base and a power distribution device. Background Art
[0002] The internal mechanism of the molded case power distribution device is fixed to the base by four screws, and the screws penetrate from the back of the base into the inside of the base to fix the internal mechanism. However, when the molded case power distribution device is in vibration or after multiple life operations, the screws may loosen. The industry usually solves this problem by applying thread glue between the screws and the base to fix them. This method is cumbersome to operate, and there is a possibility of over-applying or missing, and the glue is easy to overflow and dirty the shell. Utility Model Content
[0003] The technical problem solved by the utility model is how to improve the problem that the screws at the bottom of the molded case power distribution device in the prior art are easy to loosen.
[0004] The embodiments of the present invention can be implemented as follows:
[0005] The utility model provides a plastic shell base, comprising:
[0006] A seat body, having a bottom surface, and having screw holes on the bottom surface, wherein the screw holes have screws for fixing the components in the seat body;
[0007] The bottom plate is connected to the bottom of the seat body and is arranged in close contact with the bottom surface; a limiting column is arranged on the bottom plate, the limiting column is interference fit with the screw hole, and the limiting column is supported by the screw.
[0008] Optionally, a plurality of screw holes are provided on the bottom surface, a plurality of limiting columns are provided on the bottom plate, and the plurality of limiting columns are respectively matched with the plurality of screw holes.
[0009] Optionally, a notch is formed on the end surface of the limiting column away from the bottom plate.
[0010] Optionally, a flexible connector is provided on one side of the bottom plate, and the flexible connector is connected to the base body; the bottom plate can be flipped around the flexible connector to open the bottom surface or fit the bottom surface.
[0011] Optionally, the flexible connector is integrally formed with the base plate.
[0012] Optionally, a buckle is further provided on the bottom plate, and a slot adapted to the buckle is provided on the base body; the buckle is snap-fitted with the slot.
[0013] Optionally, the buckle is disposed on one of the side edges of the bottom plate, and the clamping groove is provided on a side surface of the base body adjacent to the bottom surface.
[0014] Optionally, when the latch is inserted into the slot, a side surface of the latch exposed from the slot is coplanar with a side surface of the seat.
[0015] Optionally, a sink groove is provided on the bottom surface, and the bottom plate is embedded in the sink groove.
[0016] The advantages of the plastic shell base provided by the utility model over the prior art include:
[0017] In the plastic shell base, the limiting column on the bottom plate can be embedded in the screw hole, and the limiting column can provide a limiting effect on the screw by holding the screw, so as to ensure the stability of the screw, and the screw is not easy to loosen even if it is in a vibrating environment. At the same time, because the limiting column and the screw hole are matched in an interference fit manner, the stability of the limiting column embedded in the screw hole can be ensured, and the limiting column can further ensure that the screw is stably held against the screw to ensure the stability of the screw. Based on this, the plastic shell base can improve the problem of easy loosening of the screws at the bottom of the plastic shell power distribution device in the prior art.
[0018] Furthermore, in the plastic shell base, the bottom plate is connected to the base body through a flexible connector, and when the bottom plate is rotated relative to the base body through the flexible connector to fit the base body, the bottom plate and the base can be matched by the snap fit of the snap fastener and the snap slot. Compared with the prior art, the double-sided adhesive used to bond the base body and the bottom plate is saved, and the problems of assembly trouble, easy assembly crookedness and falling off in the prior art are improved.
[0019] A power distribution device comprises the above-mentioned plastic shell base.
[0020] The power distribution device provided by the utility model adopts the above-mentioned plastic shell base. The beneficial effects of the power distribution device relative to the prior art are the same as the beneficial effects of the above-mentioned plastic shell base relative to the prior art, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 A schematic diagram of the structure of a first state of a power distribution device provided in an embodiment of the present application;
[0023] Figure 2 A schematic diagram of the structure of the second state of the power distribution device provided in an embodiment of the present application;
[0024] Figure 3 A schematic cross-sectional view of a power distribution device provided in an embodiment of the present application;
[0025] Figure 4 A schematic diagram of the structure of the third state of the power distribution device provided in an embodiment of the present application;
[0026] Figure 5 Another cross-sectional structural schematic diagram of the power distribution device provided in the embodiment of the present application;
[0027] Figure 6 This is a schematic structural diagram of the power distribution device provided in an embodiment of the present application from another perspective.
[0028] Icons: 10-power distribution device; 11-plastic shell base; 100-base; 110-bottom surface; 111-sunk groove; 120-screw hole; 121-screw; 130-slot; 200-bottom plate; 210-limiting column; 211-notch; 212-elastic block; 220-flexible connector; 230-fastener. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.
[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.
[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.
[0035] First embodiment
[0036] See also Figure 1 In this embodiment, a molded case base 11 is provided, which can be applied to a power distribution device 10, such as a molded case relay. The molded case base 11 can improve the problem that the screws at the bottom of the molded case power distribution device 10 are easily loosened in the prior art.
[0037] In this embodiment, please refer to Figure 1 and Figure 2 The plastic shell base 11 includes a base body 100 and a bottom plate 200. The base body 100 has a bottom surface 110, and a screw hole 120 is provided on the bottom surface 110. The screw hole 120 has a screw 121 for fixing the components in the base body 100. Generally, the inside of the base body 100 can be used to install components for power distribution operations. The base body 100 has an opening for loading components, and the bottom surface 110 is located on the side of the base body 100 away from the opening. The screw hole 120 extends from the bottom surface 110 through the inner wall of the base body 100 into the inside of the base body 100, and the screw 121 penetrates into the inside of the base body 100 to fix the components. In addition, when the screw 121 fixes the components, there is a certain distance between the screw 121 and the opening of the screw hole 120; that is, the screw 121 is completely inserted into the screw hole 120. The bottom plate 200 is connected to the bottom of the seat body 100 and is arranged in close contact with the bottom surface 110; a limiting column 210 is provided on the bottom plate 200, and the limiting column 210 is interference-fitted with the screw hole 120, and the limiting column 210 is supported by the screw 121, such as Figure 3 .in, Figure 1 This is a structural diagram of the first state of the power distribution device provided in an embodiment of the present application. The first state refers to a state in which the base plate 200 is fully unfolded relative to the base body 100. Figure 2This is a structural diagram of the second state of the power distribution device provided in an embodiment of the present application. The second state refers to a state in which the base plate 200 is flipped relative to the base body 100 to a state in which the limiting column 210 corresponds to the screw hole 120.
[0038] As described above, in the molded case base 11, the limiting column 210 on the bottom plate 200 can be embedded in the screw hole 120, and the limiting column 210 can provide a limiting effect on the screw 121 by abutting the screw 121, so as to ensure the stability of the screw 121, and the screw 121 is not prone to loosening even if it is in a vibrating environment. At the same time, since the limiting column 210 and the screw hole 120 are matched in an interference fit manner, the stability of the limiting column 210 embedded in the screw hole 120 can be ensured, and it can further ensure that the limiting column 210 stably abuts the screw 121, thereby ensuring the stability of the screw 121. Based on this, the molded case base 11 can improve the problem of the easy loosening of the screws at the bottom of the molded case power distribution device 10 in the prior art.
[0039] Furthermore, in this embodiment, the bottom surface 110 is provided with a plurality of screw holes 120, and the bottom plate 200 is provided with a plurality of limiting posts 210, and the plurality of limiting posts 210 are respectively matched with the plurality of screw holes 120. Figure 1 For example, four screw holes 120 are provided on the bottom surface 110 of the base body 100, and correspondingly, four limit columns 210 are provided on the base plate 200. The four limit columns 210 correspond to the four screw holes 120 one by one, so that any screw hole 120 is provided with a limit column 210 to ensure the stability of the screws 121 in the multiple screw holes 120.
[0040] It should be understood that in other embodiments, the number of screw holes 120 and the number of limiting posts 210 may also be adjusted according to actual conditions. In addition, in other embodiments, the number of limiting posts 210 may be less than the number of screw holes 120. In other words, some screw holes 120 may not be provided with limiting posts 210.
[0041] It is worth noting that, when a plurality of limiting posts 210 are provided to cooperate with a plurality of screw holes 120 respectively, the plurality of limiting posts 210 are respectively embedded in the plurality of screw holes 120, which can provide a certain positioning effect to the bottom plate 200, and can ensure that the bottom plate 200 is installed on the bottom surface 110 in a specified manner, thereby avoiding the situation where the bottom plate 200 is skewed. In addition, since the limiting posts 210 and the screw holes 120 are assembled in an interference fit manner, a certain assembly reinforcement effect can also be provided to the bottom plate 200, thereby ensuring the installation stability of the bottom plate 200.
[0042] It should be noted that, since the limiting column 210 is matched with the screw hole 120 in an interference fit manner, that is, the diameter of the limiting column 210 is slightly larger than the inner diameter of the screw hole 120, based on this, in order to facilitate the limiting column 210 to be installed in the screw hole 120, in this embodiment, a notch 211 is provided on the end surface of the limiting column 210 away from the bottom plate 200. Among them, the opening of the notch 211 allows the end of the limiting column 210 to be divided into two elastic blocks 212 arranged at intervals, and the notch 211 is formed between the two elastic blocks 212. During the assembly process, the two elastic blocks 212 can be brought closer to each other by elastic deformation of the two elastic blocks 212, thereby reducing the diameter of the end of the limiting column 210, and facilitating the limiting column 210 to extend into the screw hole 120.
[0043] It should be understood that in other embodiments of the present application, other methods can also be used to facilitate the insertion of the limit column 210 into the screw hole 120. For example, the limit column 210 can be set to a frustum shape. In this case, the diameter of the end of the limit column 210 is smaller than the diameter of the screw hole 120, while the diameter of the end of the limit column 210 close to the base plate 200 is larger than the diameter of the screw hole 120; after the limit column 210 is installed in the screw hole 120, the assembly of the limit column 210 and the screw hole 120 can also be achieved by interference fit. For another example, a protruding structure is set on the outer periphery of one end of the limit column 210 close to the base plate 200. After the limit column 210 is installed in the screw hole 120, the interference fit with the screw hole 120 is achieved through the protruding structure on the outer periphery of the limit column 210.
[0044] In this embodiment, a flexible connector 220 is provided on one side of the bottom plate 200, and the flexible connector 220 is connected to the base body 100; the bottom plate 200 can be flipped around the flexible connector 220 to open the bottom surface 110 or fit the bottom surface 110. The bottom plate 200 and the base body 100 are connected to form a whole through the flexible connector 220, and when the bottom plate 200 is removed from the bottom surface 110, the bottom plate 200 can be prevented from being lost. In addition, during the process of assembling the bottom plate 200 to the bottom surface 110, the flexible connector 220 can also provide a certain restriction effect, so that the bottom plate 200 can be assembled to a specified position on the bottom surface 110.
[0045] In addition, since the base plate 200 is directly connected to the base body 100 through the flexible connector 220, the steps of assembling the base plate 200 to the base body 100 can be reduced, the difficulty of assembling the base plate 200 to the base body 100 can be reduced, and the assembly efficiency can be improved.
[0046] Further, the flexible connector 220 is integrally formed with the bottom plate 200. In other words, the flexible connector 220 may be a part of the bottom plate 200. The flexible connector 220 may be provided as a part protruding from the side of the bottom plate 200, and the width of the flexible connector 220 may be small, and the thickness of the flexible connector 220 may be thin, so that the flexible connector 220 is flexible.
[0047] It should be understood that in other embodiments of the present application, other flexible connectors 220 may also be used to achieve the connection between the base plate 200 and the base body 100, such as rubber components.
[0048] In order to ensure that the bottom plate 200 can be stably assembled on the base body 100, in this embodiment, please refer to Figure 1 , Figure 4 and Figure 5 , the bottom plate 200 is also provided with a fastener 230, and the base 100 is provided with a slot 130 adapted to the fastener 230; the fastener 230 is engaged with the slot 130. It is worth noting that, preferably, the fastener 230 is arranged on the side of the bottom plate 200 relative to the flexible connector 220; that is, during the assembly process of the bottom plate 200, after the bottom plate 200 is turned over relative to the base 100 with the flexible connector 220 as the center, the bottom plate 200 is installed on the base 100 through the cooperation of the fastener 230 and the slot 130. Since the fastener 230 and the flexible connector 220 are respectively located on opposite sides of the bottom plate 200, the bottom plate 200 can be stably installed on the base 100. Figure 4 This is a structural diagram of the third state of the power distribution device provided in an embodiment of the present application. The third state refers to a state in which the base plate 200 is attached to the bottom surface 110, that is, a state in which the base plate 200 and the seat body 100 are assembled.
[0049] It should be understood that in other embodiments of the present application, the snap member 230 may also be disposed at other positions of the bottom plate 200. For example, the snap member 230 is disposed on the side of the bottom plate 200 adjacent to the flexible connector 220. For another example, the snap members 230 are disposed on multiple sides of the bottom plate 200.
[0050] Furthermore, the buckle 230 is provided on one of the side edges of the bottom plate 200, and the slot 130 is provided on the side of the base body 100 adjacent to the bottom surface 110. In this embodiment, the buckle 230 extends in a direction perpendicular to the bottom plate 200, and the buckle 230 is L-shaped; correspondingly, a protrusion adapted to the buckle 230 is provided on the inner wall of the slot 130, and when the buckle 230 is inserted into the slot 130, the L-shaped structure of the buckle 230 is hooked on the protrusion structure on the inner wall of the slot 130, thereby forming a buckling connection between the buckle 230 and the slot 130.
[0051] In addition, in this embodiment, when the buckle 230 is inserted into the slot 130, the side surface of the buckle 230 exposed from the slot 130 is coplanar with the side surface of the base 100. In other words, when the buckle 230 is inserted into the slot 130, the slot 130 is filled by the buckle 230; on the one hand, the problem of the buckle 230 protruding and being easily dialed by mistake can be avoided; on the other hand, the side surface of the base 100 can also be made flat.
[0052] In this embodiment, a recessed groove 111 is provided on the bottom surface 110, and the bottom plate 200 is embedded in the recessed groove 111. The screw hole 120 is provided on the bottom wall of the recessed groove 111. In addition, since the bottom plate 200 is provided with a flexible connector 220, the shape of the recessed groove 111 is adapted to the overall shape of the bottom plate 200 and the flexible connector 220; Figure 1 As shown, a side of the sink 111 close to the flexible connector 220 has a space adapted to the flexible connector 220 .
[0053] In summary, in the plastic shell base 11, the limiting column 210 on the bottom plate 200 can be embedded in the screw hole 120, and the limiting column 210 can provide a limiting effect on the screw 121 by abutting the screw 121, so as to ensure the stability of the screw 121, and the screw 121 is not prone to loosening even if it is in a vibrating environment. At the same time, since the limiting column 210 and the screw hole 120 are matched in an interference fit manner, the stability of the limiting column 210 embedded in the screw hole 120 can be ensured, and it can be further ensured that the limiting column 210 stably abuts the screw 121, thereby ensuring the stability of the screw 121. Based on this, the plastic shell base 11 can improve the problem of the easy loosening of the screws at the bottom of the plastic shell power distribution device 10 in the prior art. Furthermore, in the plastic shell base 11, the bottom plate 200 is connected to the base body 100 through the flexible connector 220, and when the bottom plate 200 is rotated relative to the base body 100 to fit the base body 100 through the flexible connector 220, the bottom plate 200 and the base can be matched by the snap fit of the snap fit 230 and the slot 130. Compared with the prior art, the double-sided adhesive used to bond the base body 100 and the bottom plate 200 is saved, and the problems of assembly trouble, easy assembly crookedness and falling off in the prior art are improved.
[0054] Second embodiment
[0055] See also Figure 6In this embodiment, a power distribution device 10 is provided, wherein the power distribution device 10 adopts the plastic shell base 11 in the first embodiment, and the power distribution device 10 can improve the problem of the screws at the bottom of the plastic shell power distribution device 10 being easily loosened in the prior art. At the same time, the double-sided adhesive used to bond the base 100 and the bottom plate 200 can be saved, and the problems of assembly trouble, easy assembly crookedness and falling off in the prior art can be improved.
[0056] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A plastic shell base, characterized in that: include: A seat body, having a bottom surface, and having screw holes on the bottom surface, wherein the screw holes have screws for fixing the components in the seat body; The bottom plate is connected to the bottom of the seat body and is arranged in close contact with the bottom surface; a limiting column is arranged on the bottom plate, the limiting column is interference fit with the screw hole, and the limiting column is supported by the screw.
2. The plastic shell base according to claim 1, characterized in that: The bottom surface is provided with a plurality of screw holes, the bottom plate is provided with a plurality of limiting posts, and the plurality of limiting posts are respectively matched with the plurality of screw holes.
3. The molded case base according to claim 1, characterized in that: A notch is formed on the end surface of the limiting column away from the bottom plate.
4. The plastic shell base according to claim 1, characterized in that: A flexible connector is disposed on one side of the bottom plate, and the flexible connector is connected to the seat body; the bottom plate can be flipped around the flexible connector to open the bottom surface or fit the bottom surface.
5. The plastic shell base according to claim 4, characterized in that: The flexible connector is integrally formed with the bottom plate.
6. The molded case base according to claim 1, characterized in that: The bottom plate is also provided with a buckle, and the seat body is provided with a slot adapted to the buckle; the buckle is engaged with the slot.
7. The molded case base according to claim 6, characterized in that: The buckle is arranged on one side of the bottom plate, and the clamping slot is arranged on a side surface of the base body adjacent to the bottom surface.
8. The molded case base according to claim 7, characterized in that: When the buckle is inserted into the slot, the side surface of the buckle exposed from the slot is coplanar with the side surface of the seat.
9. The molded case base according to claim 1, characterized in that: The bottom surface is provided with a sinking groove, and the bottom plate is embedded in the sinking groove.
10. A power distribution device, characterized in that: It comprises a plastic shell base as described in any one of claims 1-9.