Switching device shell and switching device

Abstract

The utility model provides a switch electric appliance housing and a switch electric appliance, the housing is provided with a terminal hole for a terminal to pass through, a protection vertical surface is formed around the terminal hole, one side of the protection vertical surface close to the terminal hole is defined as the inner side of the protection vertical surface, the inner side of the protection vertical surface is provided with a drainage groove, and the drainage groove is communicated with the terminal hole. The drainage groove is at least partially arranged around the periphery of the terminal hole, a drainage promoting structure is formed in the drainage groove, the drainage promoting structure can promote drainage of accumulated water at the terminal, and terminal rusting caused by the fact that the periphery of the terminal is moist and accumulated water is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of switch electrical appliances, in particular to a switch electrical appliance housing and a switch electrical appliance having the housing. Background Art

[0002] Electromagnetic relays generally include a base, a housing, a magnetic circuit part, a moving spring part, and a static spring part. The magnetic circuit part includes a coil frame, an enameled wire, an iron core, a yoke, and an armature. The moving spring part includes a moving spring sheet, a contact, and a moving spring lead sheet, and the static spring part includes a contact and a static spring sheet. The moving spring part and the static spring part are respectively provided with PC terminals and QC terminals. The PC terminals are used to connect to the PCB board, and the QC terminals are used to achieve quick connection. The PC terminals and QC terminals are respectively passed through the body, and the gaps between each terminal and the body are sealed with glue. In addition, protective grooves surrounding the QC terminals are respectively provided at the positions of each QC terminal on the outside of the body to increase the insulation distance between the terminals and prevent accidental contact with external conductors. When this kind of protective groove structure is used in a humid environment, it is easy to accumulate water, which will cause the QC terminals to rust, resulting in large contact resistance of the QC terminals and small current-carrying area, which may cause product failure or product fire.

[0003] The existing solution is to design a drainage structure leading to the outside on the wall of the protection groove. This structure has only a single narrow drainage opening in each drainage groove, so the water at the bottom of the groove far from the opening cannot be drained or drained clean, especially the water at the right angle is more difficult to drain. In addition, the internal glue dispensing groove is lower than the bottom of the protection groove. Once there is less glue around the terminal, the water in this part cannot be drained. Utility Model Content

[0004] Therefore, aiming at at least one of the above problems, the utility model provides a housing of a switch device and a switch device having the housing.

[0005] The utility model is implemented by the following scheme:

[0006] The utility model proposes a shell of a switch electrical appliance, wherein the shell is provided with a terminal hole for the terminal to pass through, and is characterized in that a protective facade is formed around the terminal hole, and the side of the protective facade close to the terminal hole is defined as the inner side of the protective facade, and a drainage groove is provided on the inner side of the protective facade, and the drainage groove is at least partially provided around the terminal hole, and a drainage promoting structure is formed in the drainage groove.

[0007] In one embodiment, an inclined bottom surface is formed in the drainage groove to form a drainage-promoting structure.

[0008] In one embodiment, the drainage groove is arranged around three sides of the terminal hole, and both ends of the drainage groove penetrate the end surface of the shell to form an opening, so that the two ends of the drainage groove are connected to the outside.

[0009] In one embodiment, the drainage groove is arranged around three sides of the terminal hole, and a connecting groove is arranged on the terminal surface of the shell. The connecting groove connects the end of the drainage groove and vertically penetrates the side of the shell to form an opening, so that the drainage groove is connected to the connecting groove and thus connected to the outside world.

[0010] In one embodiment, the drainage groove includes a transverse drainage groove arranged laterally and a lateral drainage groove connected to both sides of the transverse drainage groove, and the lateral drainage groove is formed with an inclined bottom surface, thereby forming the drainage promoting structure.

[0011] In one embodiment, the drainage groove includes a transverse drainage groove arranged laterally and a lateral drainage groove connected on both sides of the transverse drainage groove. The bottom surface of the transverse drainage groove is formed into a bottom surface structure with a high middle and low sides, thereby forming the drainage-promoting structure.

[0012] In one embodiment, a retaining wall is at least partially surrounded around the terminal hole, and the retaining wall is protrudingly arranged on the terminal surface of the housing, so as to form the protective facade around the terminal hole.

[0013] In one embodiment, two terminal holes are arranged on the housing, and the retaining walls are arranged around three sides of each terminal hole. The two retaining walls are arranged opposite to each other on the terminal surface, and a water flow channel is formed between the two retaining walls.

[0014] In one embodiment, the bottom surface of the water flow channel is formed into a bottom surface drainage promoting structure with a high middle and low sides.

[0015] In one embodiment, a boss is further provided on the inner bottom surface of the protective facade, the drainage groove is provided around the periphery of the boss, and the terminal hole is formed in the boss, and the upper end surface of the boss is higher than the inner bottom surface of the protective facade.

[0016] In one embodiment, a glue dispensing groove is formed on the upper end surface of the boss around the terminal hole, and the bottom surface of the glue dispensing groove is chamfered around the upper end surface of the boss, so that the upper edge of the boss forms an annular convex edge, and the annular convex edge is higher than the bottom surface of the inner side of the protective facade.

[0017] The utility model also provides a switch electrical appliance, comprising the housing of the switch electrical appliance as described in any of the above items.

[0018] In one embodiment, the switching device is an electromagnetic relay.

[0019] The technical solution provided by the utility model has the following technical effects:

[0020] 1. The utility model provides a housing of a switch electrical appliance, wherein a drainage groove is arranged on the inner side of a protective facade, wherein the drainage groove is at least partially arranged around the terminal hole, and a drainage promoting structure is formed in the drainage groove, which can promote the discharge of water accumulated at the terminal and prevent the terminal from rusting due to moisture and water accumulation around the terminal.

[0021] 2. The drainage grooves include a transverse drainage groove arranged horizontally and a lateral drainage groove connected to both sides of the transverse drainage groove. The lateral drainage grooves are formed with an inclined bottom surface, thereby forming a drainage-promoting structure to promote the drainage of accumulated water, and the residual accumulated water at the inner corner of the protective facade can be easily discharged.

[0022] 3. A retaining wall is at least partially surrounded around the terminal hole, and the retaining wall is protruding on the terminal surface of the housing, so as to form a protective facade around the terminal hole; two retaining walls are arranged opposite to each other on the terminal surface. A water flow channel is formed between the two retaining walls. The bottom surface of the water flow channel is formed into a bottom surface structure with a high middle and low sides, thereby forming a drainage structure to promote the discharge of accumulated water in the water flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional picture of the shell;

[0024] Figure 2 It is a stereoscopic view of the shell in another direction;

[0025] Figure 3 is a front view of the housing;

[0026] Figure 4 yes Figure 3 Middle AA section view;

[0027] Figure 5 yes Figure 3 Middle BB cross section;

[0028] Figure 6 yes Figure 3 Middle CC cross section;

[0029] Figure 7 yes Figure 5 Enlarged view of point D in the middle;

[0030] Figure 8 It is a schematic diagram of the double-sided drainage direction of the shell;

[0031] Fig. 9 It is a three-dimensional diagram of the electromagnetic relay body. DETAILED DESCRIPTION

[0032] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0033] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0034] like Figure 1-9 As shown, this embodiment provides a housing 10 of an electromagnetic relay, wherein the electromagnetic relay further comprises an electromagnetic relay body 20. The housing 10 is used to Fig. 9 The electromagnetic relay body 20 shown is assembled and installed. Fig. 9 As shown, the electromagnetic relay body 20 includes a static spring part 21 and a dynamic spring part 22, and the upper parts of the static spring part 21 and the dynamic spring part 22 are respectively provided with a first QC terminal 201 and a second QC terminal 202. The housing 10 is provided with a terminal hole 11 for the first QC terminal 201 and the second QC terminal 202 to pass through. The shape of the terminal hole 11 matches the cross-sectional shape of the first QC terminal 201 and the second QC terminal 202.

[0035] like Figure 1-3 As shown, a retaining wall 14 is at least partially surrounded around the terminal hole 11, and the retaining wall 14 is protruded on the terminal surface 101 of the housing 10, so as to form a protective facade 13 around the terminal hole 11. In this embodiment, retaining walls 14 are arranged around three sides of the terminal hole 11. The protective facade 13 can increase the insulation distance between the terminals and prevent accidental contact with the external conductor of the terminal. In other embodiments, the protective facade 13 can also be formed by a depression of the housing 10.

[0036] The side of the protective facade 13 close to the terminal hole 11 is defined as the inner side of the protective facade 13, and a drainage groove 15 is provided on the inner side of the protective facade 13. The drainage groove 15 is formed on the inner side of the retaining wall 14, and the drainage groove 15 is at least partially arranged around the terminal hole 11. In this embodiment, the drainage groove 15 is formed on the inner side of the retaining wall 14 as a whole, so the drainage groove 15 is arranged around the terminal hole 11 on three sides. The arrangement of the drainage groove 15 can promote the drainage of the accumulated water at the inner bottom of the protective facade 13 in a humid environment.

[0037] Among them, the terminal hole 11 for the first QC terminal 201 to pass through is arranged close to the end face 102 of the housing 10. In this way, both ends of the drainage groove 15 penetrate the end face 102 to form openings, so that both ends of the drainage groove 15 communicate with the outside. Therefore, the drainage groove 15 forms a drainage path similar to the Chinese character "冂" as shown in Figure 8 shown.

[0038] Among them, the terminal hole 11 for the second QC terminal 202 to pass through is arranged away from the end face 102 of the housing 10. A connection groove 16 is provided on the terminal face 101. The connection groove 16 communicates with the end of the drainage groove 15 and vertically penetrates the side face 103 to form an opening. In this way, the drainage groove 15 is communicated with the connection groove 16 and then communicated with the outside, and forms a drainage path similar to the Chinese character "几" as shown in Figure 8 shown.

[0039] A drainage promoting structure is formed in the drainage groove 15. The drainage promoting structure can promote the discharge of accumulated water at the terminal, and prevent the terminal from rusting due to the surrounding humidity and accumulated water. The drainage promoting structure can be a coating on the inner surface of the drainage groove 15 or a surface layer with a specific finish, so that the water in the drainage groove 15 is more easily discharged. In this embodiment, an inclined bottom surface is formed in the drainage groove 15, thereby forming a drainage promoting structure.

[0040] As Figure 3-7 shown, the drainage groove 15 includes a horizontally arranged transverse drainage groove 151 and lateral drainage grooves 152 communicated on both sides of the transverse drainage groove 151. The lateral drainage groove 152 is formed with an inclined bottom surface 1521, thereby forming a drainage promoting structure to promote the discharge of accumulated water, and it is easy to discharge the residual accumulated water at the inner corner of the protection facade 13.

[0041] As Figure 3-7 shown, the bottom surface 1511 of the transverse drainage groove 151 is formed into a bottom surface structure that is high in the middle and low on both sides, thereby forming a drainage promoting structure to promote the accumulated water to be guided from the middle to the corners on both sides for discharge, preventing the accumulated water caused by the deformation of the housing here. The bottom surface structure that is high in the middle and low on both sides can drain the water from both sides.

[0042] The two retaining walls 14 are arranged back to back on the terminal face 101, so as to increase the insulation distance between the terminals and prevent accidental contact with the external conductor of the terminal. However, the back-to-back arrangement of the two retaining walls 14 is likely to form accumulated water between the two back-to-back retaining walls 14, affecting the drainage of accumulated water from the housing 10, and further affecting the waterproof and insulation performance of the product. Therefore, in this embodiment, a water flow channel 17 is formed between the two retaining walls 14. The bottom surface of the water flow channel 17 is formed into a bottom surface drainage promoting structure that is high in the middle and low on both sides to promote the discharge of accumulated water in the water flow channel 17.

[0043] As Figure 1-3As shown, a boss 18 is further provided at the bottom of the protective facade 13, a drainage groove 15 is provided around the periphery of the boss 18, and the terminal hole 11 is formed in the boss 18. Preferably, the upper end surface of the boss 18 is higher than the bottom surface of the inner side of the protective facade 13, thereby facilitating the drainage of water accumulated at the terminal and preventing the terminal from rusting due to moisture and water accumulation around the terminal.

[0044] like Figure 1-3 As shown, the upper end surface of the boss 18 is formed with a glue groove 12 around the terminal hole 11, and the bottom surface 121 of the glue groove 12 is chamfered around the upper end surface of the boss 18. The glue groove 12 is used for glue accumulation to seal the terminal around. Preferably, the glue fills the glue groove flush with the top surface of the glue groove or slightly higher than the top surface of the glue groove around, so that the glue groove 12 is not easy to accumulate water. At this time, the upper edge of the boss 18 forms an annular convex edge, and the annular convex edge is higher than the bottom surface of the inner side of the protective facade 13, thereby facilitating the discharge of water accumulated at the terminal. In other embodiments, the upper end surface of the boss 18 may not be formed with a glue groove 12, so that the boss 18 is formed into an integral boss structure, which is simpler in structure.

[0045] like Fig. 9 As shown, the electromagnetic relay includes a static spring part 21, a dynamic spring part 22, a base 23, a magnetic circuit system 24 and a push card 25. The static spring part 21 and the dynamic spring part 22 are inserted on the base 23; the static spring part 21 includes a static contact and a static spring sheet with a first QC terminal 201 on the upper part; the dynamic spring part 22 includes a dynamic spring sheet and a dynamic spring lead-out sheet, the dynamic spring sheet is provided with a dynamic contact, and the upper part of the dynamic spring lead-out sheet is provided with a second QC terminal 202; the QC terminals of the dynamic spring part 22 and the static spring part 21 are used to connect with the external circuit to be controlled. The magnetic circuit system 24 includes a coil 242 wound on a bobbin 243, the coil 242 is sleeved on a structure composed of an iron core and a yoke 244 (the iron core is located in the middle of the coil 242, not shown), and forms a magnetic circuit with the armature 241, and the magnetic circuit system 24 is installed in the cavity of the base 23. The armature 241 is connected to the push card 25, and the push card 25 can abut against the moving spring. When the electromagnetic relay performs a closing action, the coil 242 is energized, and a magnetic force is generated in the magnetic circuit. The armature 241 is attracted by the magnetic force, thereby pushing the push card 25 to translate toward the moving spring. The translation of the push card 25 causes the moving spring abutting therewith to undergo elastic deformation, thereby causing the moving contact on the moving spring to contact the static contact on the static spring, and the circuit is thus turned on; when the electromagnetic relay performs a disconnecting action, the coil 242 loses power, and no magnetic force is generated in the magnetic circuit. The armature 241 is released, and the moving spring is no longer pushed by the push card 25. The moving spring is released and swings back, so that the moving contact on the moving spring is separated from the static contact on the static spring, and the circuit is disconnected.

[0046] This embodiment also provides an electromagnetic relay, which includes the aforementioned housing 10. The housing 10 is suitable for various electromagnetic relays with QC terminals, such as AC electromagnetic relays, DC electromagnetic relays, monostable electromagnetic relays, magnetic latching electromagnetic relays, etc., because it is conducive to draining accumulated water.

[0047] In addition, although the above embodiment is illustrated by taking the housing applied to an electromagnetic relay as an example, the housing can also be applied to other switching electrical appliances, such as a contactor, because it has the function of facilitating the drainage of accumulated water.

[0048] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A housing of a switch device, wherein the housing is provided with a terminal hole for the terminal to pass through, characterized in that: A protective facade is formed around the terminal hole, and the side of the protective facade close to the terminal hole is defined as the inner side of the protective facade. A drainage groove is arranged on the inner side of the protective facade. The drainage groove is at least partially arranged around the terminal hole, and a drainage facilitating structure is formed in the drainage groove.

2. The housing of the switch device according to claim 1, characterized in that: An inclined bottom surface is formed in the drainage groove, thereby forming a drainage facilitating structure.

3. The housing of the switch device according to claim 1, characterized in that: The drainage groove is arranged around three sides of the terminal hole, and two ends of the drainage groove penetrate the end surface of the shell to form an opening, so that the two ends of the drainage groove are connected to the outside.

4. The housing of the switch device according to claim 1, characterized in that: The drainage groove is arranged around three sides of the terminal hole, and a connecting groove is arranged on the terminal surface of the shell. The connecting groove connects the end of the drainage groove and vertically penetrates the side of the shell to form an opening, so that the drainage groove connects the connecting groove and is connected to the outside world.

5. The housing of the switch device according to claim 3 or 4, characterized in that: The drainage groove includes a transverse drainage groove arranged transversely and a lateral drainage groove connected to both sides of the transverse drainage groove. The lateral drainage groove is formed with an inclined bottom surface, thereby forming the drainage promoting structure.

6. The housing of the switch device according to claim 3 or 4, characterized in that: The drainage groove includes a transverse drainage groove arranged transversely and a lateral drainage groove connected to both sides of the transverse drainage groove. The bottom surface of the transverse drainage groove is formed into a bottom surface structure with a high middle and low sides, thereby forming the drainage promoting structure.

7. The housing of the switch device according to claim 1, characterized in that: The terminal hole is at least partially surrounded by a retaining wall, which is protruding from the terminal surface of the housing, so as to form the protective facade around the terminal hole.

8. The housing of the switch device according to claim 7, characterized in that: The housing is provided with two terminal holes, and the retaining walls are arranged around three sides of each terminal hole. The two retaining walls are arranged opposite to each other on the terminal surface, and a water flow channel is formed between the two retaining walls.

9. The housing of the switch device according to claim 8, characterized in that: The bottom surface of the water flow channel is formed into a bottom surface drainage promoting structure with a high middle and low sides.

10. The housing of the switch device according to claim 1, characterized in that: A boss is also provided on the inner bottom surface of the protective facade, the drainage groove is provided around the periphery of the boss, and the terminal hole is formed in the boss, and the upper end surface of the boss is higher than the inner bottom surface of the protective facade.

11. The housing of the switch device according to claim 10, characterized in that: The upper end surface of the boss forms a glue dispensing groove around the terminal hole, and the bottom surface of the glue dispensing groove is chamfered around the upper end surface of the boss, so that the upper edge of the boss forms an annular convex edge, and the annular convex edge is higher than the bottom surface of the inner side of the protective facade.

12. A switch electrical device, characterized in that: A housing comprising a switch electrical appliance as claimed in any one of claims 1 to 11.

13. A switch device according to claim 12, characterized in that: The switch device is an electromagnetic relay.

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