Relay

Abstract

The utility model discloses a relay, which comprises an outer shell and a side cover, the outer side of the outer shell is provided with a mounting groove, and the side cover is used for being mounted at the mounting groove so as to cover a circuit board arranged in the mounting groove; the side cover is connected with the installation groove in a buckled mode, and the side cover is locked in the installation groove through a screw. According to the utility model, a mode of buckle connection and screw fixation is adopted, so that the screw locking assembly time can be reduced, the assembly efficiency of the side cover is improved, the reliability of the assembled side cover can be ensured, the side cover is prevented from shaking, the possibility of shaking of the circuit board is reduced, and the working reliability of a product is improved.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a relay with a side cover. Background Technology

[0002] A current relay has a mounting groove on the outer side of its housing, in which a circuit board, typically an energy-saving board, is installed. This circuit board is covered and restrained by a side cover connected to the mounting groove. Currently, there are two methods for connecting the side cover to the housing: one is using multiple screws for fastening, and the other is using a snap-fit ​​connection. However, the multiple screw fastening method is cumbersome and time-consuming; while the snap-fit ​​connection method is more convenient, the housing and side cover are prone to assembly positioning errors due to dimensional inaccuracies, causing the side cover to wobble after the snap-fit ​​connection, which in turn leads to circuit board wobble and even unreliable contact problems. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing a relay that improves the efficiency of side cover assembly while ensuring the reliability of side cover assembly.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a relay, including a housing and a side cover, wherein the outer side of the housing is provided with a mounting groove, and the side cover is used to be installed in the mounting groove to cover the circuit board provided in the mounting groove; the side cover is snap-fitted to the mounting groove, and the side cover is locked to the mounting groove with a screw.

[0005] Furthermore, a mounting post is provided in the mounting groove, which passes through the circuit board, and the screw shank passes through the side cover from the outside of the side cover and is threadedly connected to the mounting post.

[0006] Furthermore, the two opposite side walls of the mounting groove are respectively provided with locking protrusions, and the side cover is provided with locking holes corresponding to each locking protrusion, with the locking protrusions and locking holes engaging in a one-to-one snap-fit; the two opposite side walls of the mounting groove are distributed in a horizontal direction, and each locking protrusion is located on the outer side of the corresponding side wall of the mounting groove.

[0007] Furthermore, the mounting groove is provided with at least one limiting post, and the circuit board is provided with a limiting hole corresponding to the limiting post, and the limiting post and the limiting hole are adapted to be inserted together.

[0008] Furthermore, the limiting post is provided with a first limiting protrusion, which limits and engages with the side of the circuit board opposite to the side cover in the thickness direction.

[0009] Furthermore, the inner sides of the opposite side walls of the mounting groove are respectively provided with stop portions, which stop and cooperate with the side of the circuit board facing away from the side cover in the thickness direction.

[0010] Furthermore, the side cover is provided with a second limiting protrusion, which limits and engages with the side of the circuit board facing the side cover in the thickness direction.

[0011] Furthermore, the inner sides of the opposite side walls of the mounting groove are respectively provided with third limiting protrusions, and the third limiting protrusions on both sides of the mounting groove are respectively limited and matched to the two sides opposite to the back of the circuit board.

[0012] Furthermore, the third limiting protrusion is a limiting rib extending along the depth direction of the mounting groove, and the end of the limiting rib near the side cover is provided with a guide slope to guide the circuit board into the mounting groove.

[0013] Furthermore, the relay is a high-voltage DC relay.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. Because the side cover of this utility model is snapped together with the mounting groove, it achieves initial positioning. The side cover is secured to the mounting groove with a single screw, achieving secondary fixation. This utility model can reduce the screw tightening assembly time, improve the assembly efficiency of the side cover, and at the same time ensure the reliability of the side cover after assembly, avoid the side cover from shaking, thereby reducing the possibility of the circuit board shaking and improving the working reliability of the product.

[0016] 2. Because there is a mounting post in the mounting slot, which passes through the circuit board, the screw shank passes through the side cover from the outside of the side cover and is threaded to the mounting post, so that the screw does not need to penetrate the side wall of the mounting slot, thereby avoiding reducing the strength of the side wall of the mounting slot.

[0017] 3. This utility model can achieve three-dimensional positioning of the circuit board, greatly improving the positioning accuracy of the circuit board and further reducing the possibility of the circuit board shaking. Attached Figure Description

[0018] Figure 1 This is an exploded view (showing a part) of the relay of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the outer shell of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the side cover of this utility model;

[0021] Figure 4This is a schematic diagram of the circuit board structure of this utility model;

[0022] Figure 5 This is a front view of the outer shell, side cover, and circuit board of this utility model in an assembled state;

[0023] Figure 6 yes Figure 5 AA section view;

[0024] Figure 7 yes Figure 6 An enlarged schematic diagram of section C;

[0025] Figure 8 yes Figure 6 An enlarged schematic diagram of section D in the middle;

[0026] Figure 9 yes Figure 5 BB cross-sectional view;

[0027] Figure 10 yes Figure 9 An enlarged schematic diagram of section E in the middle;

[0028] Figure 11 yes Figure 9 Enlarged schematic diagram of section F in the middle;

[0029] In the diagram, 1. Outer shell; 11. Mounting groove; 111. Snap protrusion; 112. Mounting post; 113. Limiting post; 114. Rib; 115. Stop; 116. Limiting rib; 117. Guide slope; 118. Support plate; 2. Side cover; 21. Snap hole; 22. Second through hole; 23. Annular boss; 3. Circuit board; 31. First through hole; 32. Limiting hole; 4. Screw. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the relay of the present invention is not limited to the embodiments.

[0031] In this invention, the terms "first" and "second" are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be interpreted as indicating or implying relative importance.

[0032] Please see Figures 1-11As shown, this utility model discloses a relay, specifically a high-voltage DC relay, which includes a housing 1 and a side cover 2. The housing 1 has a mounting groove 11 on its outer side. The side cover 2 is installed in the mounting groove 11 to cover a circuit board 3 located within the mounting groove 11. The circuit board 3 is specifically the energy-saving board of the high-voltage DC relay. Specifically, the side cover 2 is snap-fitted to the mounting groove 11, and the side cover 2 is secured to the mounting groove 11 with a single screw 4. Thus, this utility model achieves a reliable connection of the side cover 2 using a snap-fit ​​connection combined with a single screw 4, reducing the screw 4 tightening assembly time and improving the assembly efficiency of the side cover 2.

[0033] like Figure 1 , Figure 2 As shown, a mounting post 112 is provided in the mounting groove 11. The mounting post 112 passes through the circuit board 3, and the screw 4 passes through the side cover 2 from the outside and is threadedly connected to the mounting post 112. Specifically, the circuit board 3 has a first through hole 31 at its center, and the side cover 2 has a second through hole 22 at its center. The mounting post 112 passes through the first through hole 31, and the screw 4 passes through the second through hole 22 of the side cover 2 and is threadedly connected to the mounting post 112. The screw 4 is preferably a self-tapping screw, but is not limited to this.

[0034] The side cover 2 and the mounting groove 11 are connected by a snap-fit ​​mechanism as follows: The opposite side walls of the mounting groove 11 are provided with snap protrusions 111, and the side cover 2 is provided with snap holes 21 corresponding to each snap protrusion 111. The snap protrusions 111 and snap holes 21 engage in a snap-fit ​​manner. The opposite side walls of the mounting groove 11 are distributed horizontally, and each snap protrusion 111 is located on the outer surface of the corresponding side wall of the mounting groove 11. Each outer surface of each side wall of the mounting groove 11 has only one snap protrusion 111, but this is not a limitation.

[0035] like Figure 1 , Figure 2 As shown, the mounting groove 11 is provided with at least one limiting post 113, and the circuit board 3 is provided with a limiting hole corresponding to the limiting post 113. The limiting post 113 and the limiting hole are fitted together to limit the circuit board 3 in the Z and Y directions. The Z direction is the height direction of the outer shell 1, the Y direction is the depth direction of the mounting groove 11, and it is also the extension direction of the limiting post 113 and the mounting post 112. The X direction is the distribution direction of the opposite side walls of the mounting groove 11. Figure 5 , Figure 6 , Figure 9 As shown.

[0036] The limiting post 113 is provided with a first limiting protrusion, which limits and engages with the side of the circuit board 3 opposite to the side cover 2 in the thickness direction. Specifically, the first limiting protrusion includes a plurality of ribs 114, which are spaced apart circumferentially along the limiting post 113, and each rib 114 extends along the length direction of the limiting post 113, such as... Figure 2 As shown. In other embodiments, the first limiting protrusion is an annular limiting protrusion disposed on the outer periphery of the limiting post 113.

[0037] like Figure 2 As shown, the inner surfaces of the opposite side walls of the mounting groove 11 are respectively provided with stop portions 115, which stop and engage with the side of the circuit board 3 facing away from the side cover 2 in the thickness direction. Multiple stop portions 115 are provided on the inner surfaces of the opposite side walls of the mounting groove 11, specifically two as an example, but not limited to this. The multiple stop portions 115 are distributed along the height direction of the outer casing 1, and each stop portion 115 is a plate-like structure, but not limited to this. Therefore, the aforementioned first limiting protrusion (i.e., multiple protruding ribs 114) and the stop portions 115 can both limit the circuit board 3 on one side in the Y direction, such as... Figure 6-8 As shown.

[0038] The side cover 2 is provided with a second limiting protrusion, which limits and engages with the side of the circuit board 3 facing the side cover 2 in the thickness direction. Specifically, the second limiting protrusion is an annular protrusion 23 provided on the inner side of the side cover 2 and surrounding the second through hole 22, such as... Figure 3 As shown. Therefore, the second limiting protrusion can limit the circuit board 3 on the other side in the Y direction, as shown. Figure 9 , Figure 11 As shown.

[0039] The inner surfaces of the opposite side walls of the mounting groove 11 are respectively provided with third limiting protrusions, and the third limiting protrusions on both sides of the mounting groove 11 respectively limit and cooperate with the two opposite sides of the circuit board 3. Specifically, as shown in the figure... Figure 2 , Figure 8 , Figure 9 As shown, the third limiting protrusion is a limiting rib 116 extending along the depth direction of the mounting groove 11, and the end of the limiting rib 116 near the side cover 2 is provided with a guide slope 117 to guide the circuit board 3 into the mounting groove 11. Multiple third limiting protrusions are provided on the opposite side walls of the mounting groove 11, specifically two as an example, but not limited to this. The multiple third limiting protrusions are distributed along the height direction of the outer casing 1. Therefore, the third limiting protrusions on both sides of the mounting groove 11 can limit the circuit board 3 on both sides in the X direction, such as... Figure 8 , Figure 9 As shown.

[0040] In this embodiment, the bottom of the inner side surface of the opposite two side walls of the mounting groove 11 is provided with a support plate 118 for supporting the circuit board 3.

[0041] During installation, first place the circuit board 3 into the mounting groove 11, and ensure that the mounting post 112 passes through the first through hole 31 of the circuit board 3, and the tail end of the limiting post 113 passes through the limiting hole of the circuit board 3; then, press the side cover 2 onto the outside of the mounting groove 11, so that each locking hole 21 on the side cover 2 engages with each locking protrusion 111 on the mounting groove 11 in the corresponding locking hole 21 on the side cover 2, such as... Figure 9 , Figure 10 As shown; finally, pass the screw 4 through the second through hole 22 of the side cover 2 and lock it to the end of the mounting post 112, as shown. Figure 11 As shown.

[0042] Therefore, this invention first connects the side cover 2 to the mounting groove 11 via a snap-fit ​​connection, achieving initial positioning of the side cover 2. Then, a single screw 4 is used to lock the side cover 2 into the mounting groove 11, achieving secondary fixation. This allows the invention to use only one screw 4, reducing the screw tightening and assembly time, improving the assembly efficiency of the side cover 2, and ensuring the reliability of the side cover 2 after assembly. This prevents the side cover 2 from shaking, thereby reducing the possibility of the circuit board 3 shaking and improving the product's operational reliability. Furthermore, this invention can achieve three-dimensional positioning of the circuit board 3, greatly improving the positioning accuracy of the circuit board 3 and further reducing the possibility of the circuit board 3 shaking.

[0043] The relay of this utility model is identical to or can be implemented using existing technology for the parts not described herein.

[0044] The above embodiments are only used to further illustrate a relay of the present utility model, but the present utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the technical solution of the present utility model.

Claims

1. A relay, comprising a housing and a side cover, wherein a mounting groove is provided on the outer side of the housing, and the side cover is used for mounting in the mounting groove to cover a circuit board disposed in the mounting groove; characterized in that: The side cover is snapped into the mounting groove, and the side cover is secured to the mounting groove with a screw.

2. The relay according to claim 1, characterized in that: A mounting post is provided in the mounting groove, which passes through the circuit board, and the screw shank passes through the side cover from the outside of the side cover and is threadedly connected to the mounting post.

3. The relay according to claim 1, characterized in that: The mounting groove has corresponding protrusions on its opposite side walls, and the side cover has corresponding holes for each protrusion. The protrusions and holes are engaged in a snap-fit ​​manner. The mounting groove has opposite side walls distributed in a horizontal direction, and each protrusion is located on the outer side of the corresponding side wall of the mounting groove.

4. The relay according to claim 1, characterized in that: The mounting groove is provided with at least one limiting post, and the circuit board is provided with a limiting hole corresponding to the limiting post. The limiting post and the limiting hole are adapted to be inserted together.

5. The relay according to claim 4, characterized in that: The limiting post is provided with a first limiting protrusion, which limits and engages with the side of the circuit board opposite to the side cover in the thickness direction.

6. The relay according to claim 1, characterized in that: The inner sides of the two opposing side walls of the mounting groove are respectively provided with stop portions, which stop and cooperate with the side of the circuit board opposite to the side cover in the thickness direction.

7. The relay according to any one of claims 1-6, characterized in that: The side cover is provided with a second limiting protrusion, which limits and engages with the side of the circuit board facing the side cover in the thickness direction.

8. The relay according to any one of claims 1-6, characterized in that: The inner sides of the opposite two side walls of the mounting groove are respectively provided with third limiting protrusions, and the third limiting protrusions on both sides of the mounting groove are respectively limited and matched to the two sides opposite to the back of the circuit board.

9. The relay according to claim 8, characterized in that: The third limiting protrusion is a limiting rib extending along the depth direction of the mounting groove. The end of the limiting rib near the side cover is provided with a guide slope to guide the circuit board into the mounting groove.

10. The relay according to claim 1, characterized in that: The relay is a high-voltage DC relay.

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