CN212209372U

CN212209372U - Circuit board cover and plastic shell leakage circuit breaker

Info

Publication number: CN212209372U
Application number: CN202020495315.9U
Authority: CN
Inventors: 杜和艳; 王砚波; 莫洪春; 宋志文
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-12-22
Anticipated expiration: 2030-04-07

Abstract

The utility model provides a circuit board cover moulds shell earth leakage circuit breaker promptly belongs to printed circuit's spare part field, include by front, the back, two sides and a bottom surface, the bottom of bottom surface is equipped with at least one breach, breach and the inside intercommunication of cover body. The utility model discloses a design breach can make the water of congealing in time get rid of through the breach to avoid the moisture that the violent change in temperature appeared to assemble in the circuit board cover, solve the technical problem that the circuit board became invalid because of the moisture contact with assembling among the prior art, avoid the circuit board to appear in ambient temperature change and take place with the condition that water contact became invalid, the life of extension circuit board.

Description

Circuit board cover and plastic shell leakage circuit breaker

Technical Field

The utility model relates to a printed circuit's spare part field especially relates to a circuit board cover and mould shell electric leakage product.

Background

The arrangement of a circuit board cover on a circuit board is a common technical means. In non-electric products, the circuit board cover is mainly used for dust prevention, water prevention and collision prevention.

The circuit board cover can be divided into a full-closed circuit and a semi-closed circuit by structure, and the following problems exist in any kind of circuit board cover: in the use, when the ambient temperature sharply changes, especially when high temperature reduces to lower temperature by a wide margin, the too big aqueous vapor that leads to in the air in the circuit board cover of difference in temperature often separates out, and the moisture that separates out assembles in the circuit board cover and influences the circuit board, causes the circuit board to become invalid easily, needs to repair or change. Or in the experiment of high low temperature, also can appear the ambient temperature of violent change, when moisture gathering is inside circuit board cover, not only can influence the test result, also can lead to the experimental product to become invalid, cause the waste.

Based on this, the present application is proposed.

Disclosure of Invention

The utility model provides a not enough to prior art, the utility model provides a waterproof circuit board cover can avoid the moisture that the violent change in temperature appears to assemble in circuit board cover, solves the technical problem that the circuit board became invalid because of the moisture contact with assembling among the prior art, avoids the circuit board to appear the condition emergence that became invalid with water contact in ambient temperature change, prolongs the life of circuit board.

In order to achieve the above object, the utility model relates to a waterproof circuit board cover structure as follows: the mask comprises a front surface, a back surface, two side surfaces and a bottom surface, wherein the bottom of the bottom surface is provided with at least one notch which is communicated with the interior of the mask body; the upper edge of the back surface is higher than the upper edge of the front surface.

Among the above-mentioned structure, because the bottom surface is under when the circuit board cover uses, the bottom is under, consequently through setting up breach and external intercommunication in the bottom surface, when the temperature takes place violent change, the water of congealing that the air is appeared will assemble the bottom of circuit cover plate under the dual function of gravity and structure, and discharge from the circuit protection cover via this breach, the possibility of circuit board and moisture contact has been stopped through the mode of will congealing water and discharging completely, thereby effectively prevent the circuit board because of condensing the water contact and become invalid, the life of extension circuit board.

The utility model discloses further set up as follows: the outer surface of the back is provided with a bulge. The bulge is used for generating a certain gap between the back surface of the circuit board cover and the mounting surface, so that condensed water flowing out of the gap flows out of the gap, and the circuit board is protected from being corroded by the condensed water.

The installation face or the complex contact surface that contact when installing along rather than the installation is separated on making the back of circuit board cover to in the condensed water outflow, the utility model discloses further set up as follows: the protrusion is disposed proximate to the back upper edge.

The utility model discloses further set up as follows: the protrusion is arranged in the center of the back face, the middle protruding structure can act on the whole back face, and the separation of the back face of the circuit board and the mounting face or the contact face can be achieved with the least quantity and the simplest structure.

For the stability when making the arch play the separation effect, the utility model discloses further set up as follows: the plane bulge is a plane bulge, and the contact area between the plane bulge and the mounting surface can be increased through the plane, so that the plane bulge and the mounting surface or the contact surface form face-to-face clearance fit, the friction force is increased, and the stability of the separation effect of the bulge is improved.

For the whole installation face or the complex contact surface integral separation that contacts when making the whole rather than the installation in back of circuit board cover, the utility model discloses further set up as follows: the breach protrusion in the surface of back, so, the bottom at the back is through the bellied joint action that distributes in the convex breach structure and the top of both sides (promptly above the upper limb place one side) set up, realizes the whole and installation face of back or the interval cooperation of contact surface, provides the space for the outflow of the water that congeals.

The utility model discloses further set up as follows: the height that the breach protruded in the back is not more than the height that the arch protruded in the back to, when placing horizontally, ensure that the condensate flows out from the breach, rather than flowing to its offside.

For ensuring the discharge velocity of the condensed water, the utility model discloses further set up as follows: the number of the notches is at least two.

The utility model discloses further set up as follows: the breach is two, two the breach is located respectively the both ends of bottom surface. The gaps can correspond to the positions of the bulges and are distributed in an isosceles triangle shape, so that the spacing effect is further improved, and a condensed water outlet channel is guaranteed. And, because in the circuit board cover, the final gathering of water that congeals is in the bottom, sets up the breach in the device both sides and is evenly distributed state, makes the inside water that congeals of circuit board cover everywhere all can flow through this breach, can improve the discharge velocity of congealing water.

The utility model discloses further set up as follows: the two notches are respectively arranged at two ends of the joint of the back surface and the bottom surface. The juncture at breach position department side and the back under this position can be discharged the congeal water that two sides gathered fast on the one hand, and on the other hand also avoids dead angle department in the circuit board cover to be detained and congeal water and influence the circuit board.

For the closure when improving the circuit board cover use, the utility model discloses further set up as follows: the upper edges of the back surface and the side surfaces are higher than the upper edge of the front surface. When the circuit board cover is used, the front surface is installed inwards, the back surface is installed outwards, and after the circuit board cover is installed, a surface which is matched in a sealing mode can be formed between the back surface and the upper edge, protruding out of the side surface, of the circuit board cover and the edge of the groove of an installed product or the position near the edge of the groove of the installed product, so that the sealing performance of the circuit board cover is improved.

Another object of the utility model is to provide a moulded case leakage circuit breaker, including base and the aforesaid arbitrary circuit board cover, be equipped with the recess that is used for the mounting line board on the base, the circuit board cover with the size of recess suits. Because most of plastic case leakage products adopt a semi-open design, when the temperature variation range is overlarge, the water condensation phenomenon in the circuit board cover is particularly prominent. Therefore, by adopting the circuit board cover, the condensed water can be discharged through the notch at the first time, so that the condition that the plastic case leakage circuit breaker fails and cannot work normally is avoided.

The utility model discloses moulded case earth leakage circuit breaker further sets up as follows: the two side surfaces of the circuit board cover and the upper edge of the back surface extend to the base along the length direction of the circuit board cover, so that the two sides of the circuit board cover and the back surface are in gapless fit with the base. The utility model discloses a both sides and the upper surface that make the circuit board cover stretch out the face and seal with the base cooperation to seal the pollution that the protection circuit board was avoided dividing disconnected back blowout arc in the cover.

The utility model has the advantages as follows:

the utility model discloses an add the opening of locating external intercommunication in circuit board cover bottom, make in the circuit board congeal water and can discharge through this opening, avoid congealing water and lead to the circuit board inefficacy in the circuit board cover to the life of extension circuit board.

Two, the utility model discloses add the boss bottom the circuit board cover for when the circuit board cover is used to the level, there is certain interval between the installation place face of circuit board cover rather than installation or the contact surface of mutually supporting, so that the condensed water can be discharged through this interval.

Drawings

Fig. 1 is a back perspective view of a circuit board cover according to embodiment 1 of the present invention.

Fig. 2 is a front perspective view of a circuit board cover according to embodiment 1 of the present invention.

Fig. 3 is a schematic view of the back of the circuit board cover according to embodiment 1 of the present invention.

Fig. 4 is a schematic cross-sectional view of fig. 3A.

Fig. 5 is a schematic structural view of a circuit board cover according to embodiment 2 of the present invention.

Fig. 6 is the whole schematic diagram of the molded case circuit breaker of the present invention.

Reference numerals: 100-circuit board cover, 200-base;

110-side surface, 120-back surface, 121-plane protrusion, 122-notch, 130-bottom surface, 131-positioning protrusion, 140-front surface, 210-mounting groove, 211-limiting part.

Detailed Description

The utility model provides a circuit board cover 100 of putting into formula, need put into circuit board cover 100's inside back with the circuit board earlier during its use, install circuit board cover 100 joint or grafting in appointed mounting groove 210 again, and the half uncovered clearance fit between the lateral wall through circuit board cover 100 and mounting groove on circuit board cover 100 realizes hiding.

Example 1

Referring to fig. 1 to 3, the present embodiment provides a circuit board cover 100 with waterproof function, which includes a cover body with an upper opening, which is composed of a front surface 140, a back surface 120, two side surfaces 110 and a bottom surface 130, wherein the front surface 140 and the back surface 120 are a pair of planes with a certain width, which are oppositely disposed, and the front surface 140 and the back surface 120 are oppositely disposed with respect to the upper and lower surfaces of the circuit board when in use. The two sides of the front surface 140 are connected to the two sides of the back surface 120 by a side surface 110, and the bottom side of the front surface 140 is connected to the bottom side of the back surface 120 by a bottom surface 130. The cover body of the embodiment can be an integrated structure formed in one step by injection molding of a mold. In order to quickly discharge condensed water in the circuit board cover 100 when the temperature changes dramatically, the bottom surface 130 of the circuit board cover 100 is provided with a notch 122 communicated with the outside.

Preferably, the number of the notches 122 may be two, and the notches 122 are preferably disposed at two sides of the bottom surface 130 and adjacent to the side surface 110, so that the notches 122 are disposed at the dead angle, thereby effectively avoiding the water condensation at the dead angle.

Further, a protrusion (typically, 1-3 mm) may be provided on the outer surface of the rear surface 120 to keep the rear surface 120 spaced from the mounting surface or the contact surface of the circuit board cover 100 at a certain distance, and the protrusion may be further provided as a planar protrusion 121 to keep the contact position stable. Referring to fig. 2, in the present embodiment, the planar protrusion 121 is disposed at the center of the upper edge of the back surface 120.

Example 2

Referring to fig. 4, the present embodiment is different from embodiment 1 in that: in order to increase the distance for passing the condensed water, the notch 122 may also protrude from the outer surface of the back surface 120, and the protrusion and the two notches 122 are distributed in a triangular manner, so as to stably "prop up" the whole back surface 120 from the top and the bottom of the back surface 120 relative to the mounting surface or the contact surface, so as to leave a sufficient space gap for the condensed water to flow out. In particular, when two notches 122 are formed and are respectively disposed near the side surface 110, the planar protrusion 121 and the two notches 122 are distributed in a triangular isosceles shape, so that the structure is more stable and the spacing effect is optimal.

Preferably, the protrusion height l1 of the notch 122 is less than or equal to the protrusion height l2 of the plane protrusion 121 in the present embodiment. When the circuit board slot is laid horizontally on the cover, the bottom side of the gap 122 will be lower than or aligned with the protrusion, so that the condensed water can be discharged from the gap 122 side. When the circuit board cover 100 is vertically assembled for use, the height of the outer side of the bottom surface 130 may also be higher than the height of the inner side of the bottom surface 130 (when in use, the back surface 120 in this embodiment is generally the outer surface, and the front surface 140 is the inner surface), so that condensed water flows out from the notch 122 located at the inner side of the bottom surface 130 under the action of gravity, and the condensed water is prevented from remaining.

In the above preferred embodiment, l2 and l1 are not less than 0.25mm, preferably 0.5 mm.

Example 3

Referring to fig. 5, the present embodiment is different from the above embodiments in that: in this embodiment, when in use, the back surface 120 is used as an outer surface, the front surface 140 is used as an inner surface, the upper edges of the back surface 120 and the side surfaces 110 are higher than the upper edge of the front surface 140, and the raised extension portion can be in gapless fit with a product, thereby improving the final sealing effect of the circuit board cover 100.

Preferably, the height of the raised portion is not less than 1mm, preferably 1.5 to 2.5 mm.

Example 4

The present embodiment differs from the above embodiments in that: in this embodiment, the number of the notches 122 is one, and the notches are disposed at a junction between the bottom surface 130 and any one of the side surfaces 110, or at a junction between the back surface 120 and the bottom surface 130 and any one of the side surfaces 110, or at a central position of the junction between the back surface 120 and the bottom surface 130.

Alternatively, the number of the notches 122 in the embodiment may be 3, wherein two notches 122 are respectively disposed on the back surface 120 and the bottom surface 130, and the remaining one notch 122 is disposed at the center of the junction between the back surface 120 and the bottom surface 130. Alternatively, two notches 122 of the 3 notches 122 are distributed at the junction of the bottom surface 130 and the side surface 110, and the remaining one notch 122 is disposed at the center of the junction of the back surface 120 and the bottom surface 130. Or, the 3 notches 122 are equally distributed at the junction of the back surface 120 and the bottom surface 130, and are equidistantly arranged.

The utility model discloses the quantity and the position distribution of breach 122 do not use above-mentioned examples as the restriction in the application, and it can carry out the change of adaptability according to the installation in service behavior of specific environment and circuit board cover 100. Further, in the above embodiment, the length l, the width d and the height h of the notch 122 are preferably not less than 2.5mm, respectively, otherwise, when the notch 122 is too small, condensed water is difficult to be discharged through the notch 122 due to the tension of the surface of the water itself.

Example 5

Referring to fig. 6, an object of the present embodiment is to provide a molded case electrical leakage breaker, which is a specific application of the above embodiment, the molded case electrical leakage breaker includes a base 200, a mounting groove 210 is formed on the base 200, and a limiting portion 211 is disposed in the mounting groove 210 to divide the molded case electrical leakage breaker into a large space and a small space. The length, width and height of the large space are all adapted to the size of the circuit board cover 100, the circuit board is placed in the circuit board cover 100, the back surface 120 of the circuit board cover 100 faces outwards, and the circuit board cover is covered and buckled in the large space of the mounting groove 210 through the positioning protrusion 131 on the bottom surface 130 of the circuit board cover. The two side surfaces 110 and the upper edge of the back surface 120 of the circuit board cover 100 extend to the base 200 along the length direction thereof and are in clearance fit with the base 200. In this embodiment, the circuit board cover 100 may adopt any specific implementation structure of the above embodiments 1 to 4.

Through above-mentioned circuit board cover 100, the protection effect that the present embodiment moulded case residual current circuit breaker can realize the waterproof, prevent arc, dirt-proof of circuit board, its simple structure, be convenient for reform transform, also the facilitate promotion production.

Claims

1. A circuit board cover, its characterized in that: the mask comprises a front surface, a back surface, two side surfaces and a bottom surface, wherein at least one notch is formed in the bottom of the bottom surface, and the notch is communicated with the interior of the mask body.

2. The circuit board cover according to claim 1, wherein: the outer surface of the back is provided with a bulge.

3. The circuit board cover according to claim 2, wherein: the protrusion is arranged close to the upper edge of the back face and/or the protrusion is arranged in the center of the back face and/or the protrusion is a plane protrusion.

4. The circuit board cover as claimed in any of claims 1-3, wherein: the notch protrudes out of the outer surface of the back face.

5. The circuit board cover according to claim 4, wherein: the height of the notch protruding out of the back surface is not more than the height of the protrusion protruding out of the back surface.

6. The circuit board cover according to claim 5, wherein: the breach is two at least, two at least the breach is located respectively the both ends of bottom surface.

7. The circuit board cover according to claim 6, wherein: the notches are respectively arranged at two ends of the joint of the back surface and the bottom surface.

8. The circuit board cover according to claim 4, wherein: the upper edges of the back surface and the side surfaces are higher than the upper edge of the front surface.

9. The circuit board cover according to any one of claims 1, 2, 3, 5, 6, and 7, wherein: the upper edges of the back surface and the side surfaces are higher than the upper edge of the front surface.

10. A plastic case leakage breaker is characterized in that: the circuit board cover comprises a base and the circuit board cover as claimed in any one of claims 1 to 9, wherein a groove for mounting a circuit board is formed in the base, and the size of the circuit board cover is matched with that of the groove.

11. A molded case leakage circuit breaker according to claim 10, wherein: the two side faces and the upper edge of the back face of the circuit board cover extend onto the base along the length direction of the circuit board cover, and the two sides and the back face of the circuit board cover are in gapless fit with the base.