A waterproof and breathable housing and a relay

Abstract

A waterproof and breathable housing and relay, comprising a housing, characterized in that: a channel, a first hole, a second hole and a third hole are provided on the housing; the channel extends along a first direction of the housing, one end of which is closed, and the inner wall of the channel is provided with a slope inclined toward a second direction; the first hole is opened at the other end of the channel and communicates with the outside world; the second hole is opened at the slope and communicates with the inside of the housing; the third hole is close to the closed end of the channel and communicates with the outside world. The housing and relay of the present invention do not limit the installation direction, can discharge the gas generated in the housing, and can achieve waterproofing at multiple angles, extend the electrical service life, and have a simple structure.

Description

Technical Field

[0001] The invention relates to the field of relays, in particular to a waterproof and breathable housing and a relay. Background Art

[0002] Electromagnetic relays are automatic switching elements with isolation functions at the input and output ends. They are widely used in many fields such as communications, automobiles, automatic control, and household appliances. They are one of the most important control elements.

[0003] In the existing electromagnetic relay technology, there is a plastic-sealed electromagnetic relay. In order to prevent liquids such as flux, water, and molding agents from entering the interior of the relay, causing a short circuit between the input and output ends or between the contacts of the relay and a decrease in insulation, the relay is sealed. As a result, during the operation of the relay, the organic gas and heat volatilized from the plastic parts due to the temperature rise cannot be discharged. The organic gas decomposes under the action of the electric arc and precipitates carbon compounds, thereby increasing the failure rate of the relay and reducing its service life.

[0004] One is a non-plastic-sealed electromagnetic relay, which includes a shell and a relay unit contained in the shell. The shell is provided with ordinary air holes, which can release the gas generated by the temperature rise inside the relay and the heat generated during the contact switching load process, greatly improving the electrical life of the relay. However, this relay with ordinary air holes is not suitable for humid environments with water droplets.

[0005] There is another type of non-plastic-sealed electromagnetic relay with special ventilation holes on the shell. Although this ventilation hole structure can prevent water droplets from entering in a specific installation direction, it cannot meet the waterproof effect in other installation directions, which makes the product have certain limitations in the installation direction. Summary of the invention

[0006] The main purpose of the present invention is to overcome the above-mentioned defects in the prior art and to provide a waterproof and breathable housing and a relay, which are not restricted in the installation direction, can achieve breathability and multi-angle waterproofing, and extend the electrical service life.

[0007] The present invention adopts the following technical solution:

[0008] A waterproof and breathable shell includes a shell, characterized in that: a channel, a first hole, a second hole and a third hole are provided on the shell; the channel extends along a first direction of the shell, one end of which is closed, and an inner wall of the channel is provided with a slope inclined toward a second direction; the first hole is opened at the other end of the channel and connected to the outside; the second hole is opened at the slope and connected to the inside of the shell; the third hole is close to the closed end of the channel and connected to the outside.

[0009] Preferably, the third hole and the second hole are staggered; or the third hole comprises two third holes, and the second hole is located between the two third holes.

[0010] Preferably, a liquid storage tank is formed between the slope and the closed end of the channel.

[0011] Preferably, a convex portion is provided on the top of the shell, and the closed end of the channel is located at the top of the convex portion.

[0012] Preferably, the inner wall of the channel is further provided with a first inclined surface inclined toward the second direction, and the first inclined surface is formed between the other end of the channel and the slope.

[0013] Preferably, the first hole extends along the second direction, and an inner wall thereof is provided with a second inclined surface inclined toward the first direction.

[0014] Preferably, a fourth hole is provided at the closed end of the channel, and the fourth hole is filled with epoxy resin glue to achieve sealing.

[0015] Preferably, the shell comprises a top wall and a side wall, the channel extends from the side wall to the top wall, and the first hole is located on the side wall.

[0016] Preferably, the second hole is located on the top wall.

[0017] A waterproof and breathable relay comprises a relay unit, characterized in that it also comprises any of the waterproof and breathable housings described above.

[0018] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The housing and relay of the present invention are provided with a channel, a first hole, a second hole and a third hole to form a waterproof and breathable structure, which does not limit the installation direction, can discharge the gas generated in the housing, and can achieve waterproofing at multiple angles, extend the electrical service life, and has a simple structure.

[0020] 2. In the housing and relay of the present invention, the third hole and the second hole are staggered in distribution. Therefore, when liquid enters the channel from the third hole, it can be prevented from entering the housing from the second hole.

[0021] 3. The housing and relay of the present invention form a liquid storage tank between the slope and the closed end of the channel, and the second hole is located at a certain distance from the bottom wall of the liquid storage tank. When the liquid is in the liquid storage tank, it can be discharged through the third hole and will not enter the interior of the shell; when the liquid cannot be discharged from the third hole at a specific angle, the heat generated by the operation of the relay can evaporate the liquid.

[0022] 4. The housing and the relay of the present invention have a first inclined surface in the channel and a second inclined surface in the first hole to guide flow.

[0023] 5. The waterproof and breathable structural shell of the present invention can be integrally injection-molded with plastic parts, and has a simple and practical structure and is easy to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the housing of the present invention;

[0025] Figure 2 It is a partial cross-sectional view of the present invention;

[0026] Figure 3 It is a cross-sectional view of the present invention;

[0027] Figure 4 for Figure 3 A partial enlarged view of

[0028] Figure 5 It is the structural diagram of the relay of the present invention;

[0029] Figure 6 It is a partial cross-sectional view of the present invention (placement direction one);

[0030] Figure 7 It is a partial cross-sectional view of the present invention (placement direction two);

[0031] Figure 8 It is a partial cross-sectional view of the present invention (placement direction three);

[0032] Fig. 9 It is a partial cross-sectional view of the present invention (placement direction four);

[0033] Among them: 10, shell, 10a, convex part, 10b, liquid storage tank, 11, channel, 12, first hole, 13, second hole, 13a, small slope, 14, third hole, 15, slope, 16, first inclined surface, 17, second inclined surface, 18, fourth hole, 19, epoxy resin glue, 20, relay unit. DETAILED DESCRIPTION

[0034] The present invention is further described below through specific implementation modes.

[0035] Reference Figures 1 to 4 A waterproof and breathable housing includes a housing 10, which can be made of insulating plastic and has a main body in the shape of a cuboid. The housing 10 includes a top wall, a side wall, and a bottom plate to enclose a space for accommodating a device. A waterproof and breathable structure is provided at a suitable position on the housing 10, and the waterproof and breathable structure includes a channel 11, a first hole 12, a second hole 13, and a third hole 14.

[0036] The channel 11 extends along the first direction of the housing 10, and one end thereof is closed. In the second direction, a slope 15 inclined toward the second direction is provided on the inner wall of the channel 11 close to the inside of the housing 10. A liquid storage tank 10b is formed between the slope 15 and the closed end of the channel 11, and a first inclined surface 16 is formed between the slope 15 and the other end of the channel 11, and the first inclined surface 16 is also located close to the inside of the housing 10. The first inclined surface 16 is inclined toward the second direction.

[0037] In the present invention, the first direction is the height direction of the housing 10, which can be used as the Z axis. The second direction is perpendicular to the first direction, which can be the width direction of the housing 10, which can be used as the Y axis. The third direction is perpendicular to the first direction, which can be the length direction of the housing 10, which can be used as the X axis.

[0038] The first hole 12 is opened at the other end of the channel 11, one end of which is connected to the outside, and the other end is connected to the channel 11. The first hole 12 can be set on the side wall and extend along the second direction. The inner wall of the first hole 12 is provided with a second inclined surface 17 inclined toward the first direction, and the second inclined surface 17 is located on the side of the first hole 12 away from the first inclined surface 16. The inclination angle of the first inclined surface 16 can be less than or equal to the inclination angle of the second inclined surface 17, preferably less than.

[0039] The second hole 13 is provided at the slope 15 and communicates with the interior of the housing 10, and is used to discharge the gas generated when the components inside the housing 10 are working. In the third direction, the second hole 13 is located on the side of the slope 15 close to the outside. In addition, a small slope 13a inclined along the second direction is also provided on the side of the second hole 13, so that the height difference between the bottom surface of the liquid storage tank 10b and the second hole 13 constitutes a liquid storage structure.

[0040] The third hole 14 is close to the closed end of the channel 11 and communicates with the outside. The number of the third holes 14 can be one, two or even more. Preferably, two third holes 14 are included, and the two third holes 14 and the second hole 13 are staggered, and the second hole 13 is located between the two third holes 14. Then, when the liquid enters the channel 11 from the two third holes 14, it is prevented from entering the interior from the second hole 13.

[0041] The present invention may be provided with a convex portion 10a on the top of the housing 10, and the closed end of the channel 11 is provided at the top of the convex portion. The channel 11 may extend from the side wall to the top of the convex portion 10a of the top wall, and the first hole 12 may be provided on the side wall, and the second hole 13 is located on the inner side of the top wall, and a drop difference is formed between the second hole 13 and the third hole 14, and the third hole 14 is higher than the orifice of the second hole 13. The third hole 14 may be located on the side of the convex portion 10a or on the side wall of the housing. The position of the convex portion 10a and the position and number of the waterproof and breathable structure are not unique and can be set as required.

[0042] Furthermore, the closed end of the channel 11 of the present invention may be provided with a fourth hole 18, which is sealed by filling epoxy resin glue 19. The sealing material is not limited thereto, and a waterproof tape may be pasted on the end surface of the fourth hole 18 for sealing.

[0043] The outer shell with a waterproof and breathable structure of the present invention can be integrally injection-molded with plastic parts.

[0044] The present invention further provides a waterproof and breathable relay, comprising a relay unit 20 and the above-mentioned waterproof and breathable housing, wherein the relay unit 20 is installed inside the housing 10 .

[0045] The housing of the present invention and the relay having the housing can achieve waterproof and breathable properties in multiple directions. Figure 5 , taking the first direction as the Z axis, the second direction as the Y axis, and the third direction as the X axis as an example, the specific principle is as follows:

[0046] See also Figure 6 , the housing 10 is located in the default direction, i.e., the +Z direction, and its channel extends along the Z axis, with its convex portion located at the top of the housing 10, and the first hole 12 and the third hole 14 located at the side. At this time, since the second hole 13 is misaligned with the two third holes 14, when water flows into the channel 11, it flows along the channel 11 to the first hole 12 and then is discharged, and will not enter the interior through the second hole 13.

[0047] See also Figure 8 , remove the housing 10 from Figure 6 The default direction of the housing 10 is flipped 180° in the Z-axis direction, and the product placement direction becomes the -Z direction, with the convex portion located at the bottom of the housing 10, and the first hole 12 and the third hole 14 located at the side. At this time, the liquid enters the liquid storage tank 10b through the first hole 12 or the third hole 14. Since the second hole 13 is a certain distance away from the liquid storage tank 10b and the third hole 14 is located below the second hole 13, the liquid is discharged through the third hole 14 and does not enter the interior of the housing 10.

[0048] See also Figure 7 , remove the housing 10 from Figure 6 The default direction of the housing 10 is flipped in the X-axis direction (for example, flipped 90° to the left or right), and the product placement direction becomes +X or -X. At this time, the convex portion changes from being located at the top of the housing 10 to being located at the left or right side. Since the second hole 13 is located on the side of the slope 15 close to the outside in the third direction, that is, the height of the second hole 13 is greater than the first hole 12 and one of the third holes 14, the liquid in the liquid storage tank 10b can first flow out from the first hole 12 and the third hole 14.

[0049] The housing 10 is removed from Figure 6 The default direction of the housing 10 is flipped in the Y-axis direction (for example, flipped 90° forward or backward), and at this time, the protrusion changes from being located at the top of the housing 10 to being located at the front side or the rear side. Fig. 9If it is flipped backwards, the product placement direction becomes +Y, then the first hole 12 and the third hole 14 are located at the top instead of the side of the housing 10. When the liquid enters the channel 11 from the first hole 12 or the third hole 14, it flows along the first slope 16 to the liquid storage tank 10b. Since the height of the second hole 13 is greater than the bottom surface of the liquid storage tank 10b, the liquid will not enter the housing 10 through the second hole 13 in a short time. The heat generated by the relay operation can evaporate the liquid. If it is flipped forwards, the product placement direction becomes -Y, then the first hole 12 and the third hole 14 are located at the bottom, and water cannot enter the channel 11 and the inside of the housing 10.

[0050] The waterproof and breathable structure of the present invention can not only discharge the gas generated by the internal relay, but also prevent liquids such as water from entering the housing 10 at multiple angles, so that the relay can work in a humid environment, ensuring a sufficiently long fixed electrical service life.

[0051] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A waterproof and breathable shell, comprising a shell, characterized in that: The shell is provided with a channel, a first hole, a second hole and a third hole; the channel extends along the first direction of the shell, one end of the channel in the first direction is closed, and the inner wall of the channel close to the inside of the shell is provided with a slope inclined toward the second direction; the first hole is opened on the inner wall close to the outside world at the other end of the channel in the first direction and connected to the outside world; the second hole is opened at the slope and connected to the inside of the shell; the third hole is located on the inner wall of the channel close to the outside world to connect to the outside world, and the third hole is also close to the closed end of the channel; the first direction is the Z axis, the second direction is the Y axis, and the third direction is the X axis; in In the first direction, the second hole is arranged to be staggered with the first hole and the third hole to form a height difference, so that when the shell is placed in a default direction, water in the channel is discharged from the first hole, or when the shell is flipped 180° relative to the default direction, the water in the channel is discharged from the third hole; in the third direction, the second hole is arranged to be staggered with the first hole and the third hole to form a height difference, so that when the shell is flipped 90° on the X-axis relative to the default direction, the water in the channel is discharged from the first hole and the third hole; waterproofing at multiple angles is achieved.

2. The waterproof and breathable shell according to claim 1, characterized in that: Two third holes are included, and the second hole is located between the two third holes.

3. The waterproof and breathable shell according to claim 1, characterized in that: A liquid storage tank is formed between the slope and the closed end of the channel.

4. The waterproof and breathable shell according to claim 1 or 3, characterized in that: A convex portion is provided on the top of the shell, and the closed end of the channel is located at the top of the convex portion.

5. The waterproof and breathable housing according to claim 1, wherein: The inner wall of the channel is also provided with a first inclined surface inclined toward a second direction, and the first inclined surface is formed between the other end of the channel and the slope.

6. The waterproof and breathable shell according to claim 1 or 5, characterized in that: The first hole extends along the second direction, and an inner wall of the first hole is provided with a second inclined surface inclined toward the first direction.

7. The waterproof and breathable housing according to claim 1, wherein: The closed end of the channel is provided with a fourth hole, and the fourth hole is filled with epoxy resin glue to achieve sealing.

8. The waterproof and breathable housing according to claim 1, wherein: The shell includes a top wall and a side wall, the channel extends from the side wall to the top wall, and the first hole is located on the side wall.

9. The waterproof and breathable housing according to claim 8, characterized in that: The second hole is located on the top wall.

10. A waterproof and breathable relay, comprising a relay unit, characterized in that: Also includes the waterproof and breathable shell according to any one of claims 1 or 9.

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