CN114865885A

CN114865885A - High-power waterproof switching power supply box

Info

Publication number: CN114865885A
Application number: CN202210366121.2A
Authority: CN
Inventors: 周华宇; 张志乾; 黄逊; 唐景新
Original assignee: Changzhou Chuanglian Power Supply Co ltd
Current assignee: Changzhou Chuanglian Power Supply Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-08-05
Anticipated expiration: 2042-04-08
Also published as: CN114865885B

Abstract

The invention belongs to the technical field of switch power supply boxes, and relates to a high-power waterproof switch power supply box, which comprises: the utility model discloses a sealing structure, including drain pan, upper cover and two curb plates, the both ends at drain pan top all are equipped with the outer arch and the baffle that the interval set up, be equipped with the seal groove between outer arch and the baffle, the inherent sealing strip of seal groove inside callipers, be equipped with on the interior diapire of drain pan and can dismantle and be used for fixed PCB's copper post, first internal thread groove has been seted up at the top of copper post, the both ends of upper cover bottom all be equipped with outer bulge complex L type buckle and lower bulge, lower bulge is used for extruding the sealing strip, make the sealing strip produce deformation and block up the gap, formed the holding tank between L type buckle and the lower bulge, one side that the holding tank was kept away from to lower bulge is equipped with the scarce groove that links up with the baffle, be equipped with the sealing washer on the inside wall of curb plate, the curb plate passes through a plurality of screw fixation on the lateral wall of drain pan and upper cover. The invention has protective performance, improves waterproof performance and avoids water seepage phenomenon in high-temperature operation.

Description

High-power waterproof switching power supply box

Technical Field

The invention relates to the technical field of switch power supply boxes, in particular to a high-power waterproof switch power supply box.

Background

The switch power supply is a power supply which utilizes the modern power electronic technology to control the on-off time ratio of a switch tube and maintain stable output voltage. The switching power supply is widely applied to almost all electronic devices due to the characteristics of small size, light weight and high efficiency, and is an indispensable power supply control mode for the rapid development of the electronic information industry at present. In order to avoid damage or short circuit of internal elements of the switching power supply, the protection performance and the waterproof performance of the switching power supply box must be good, especially the high-power switching power supply box. However, although the high power switching power supply box shown in fig. 1 has good protection performance, its waterproof performance is not ideal and water will permeate when operating at high temperature, thus causing poor high voltage of the product. The reason why the waterproof performance of the high-power switch power supply box is not ideal is found through tests of technicians: 1. the upper cover, the bottom cover and the side plates are spliced and fixed through screws, and the upper cover and the bottom cover are only abutted and not connected, so that water is easy to permeate; 2. because the size of the product is large, the time difference of the upper cover and the bottom shell during sawing is more than 0.5mm, and water is easy to permeate; 3. the bottom wall is equipped with the riveting copper post that is used for installing PCB in the drain pan, and this riveting copper post is easily intake.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve the problem that the high-power switching power supply box has good protective performance, but the waterproof performance is not ideal when the high-power switching power supply box operates at high temperature, the invention provides the high-power waterproof switching power supply box, the upper cover and the bottom shell are fixed in a clamping and hooking mode through the L-shaped buckle and the outer bulge, and the sealing strip is extruded by pressing the lower bulge while being fixed, so that the sealing strip can deform, the deformed sealing strip can block a gap between the back of the outer bulge and the lower bulge, and water is prevented from permeating from the gap; the sealing ring is added on the inner wall of the side plate to make up the time drop during the saw cutting of the upper cover and the bottom shell; abandon the riveting copper post, directly change the copper post of installing on the bottom diapire in the bottom.

The invention provides a high-power waterproof switch power supply box, which comprises: the bottom shell, the upper cover and the two side plates, wherein outer protrusions and partition plates which are arranged at intervals are arranged at two ends of the top of the bottom shell, a sealing groove is formed between the outer protrusions and the partition plates, a sealing strip is fastened in the sealing groove, a copper column which can be detached and used for fixing a PCB is arranged on the inner bottom wall of the bottom shell, a first inner thread groove is formed in the top of the copper column, an L-shaped buckle and a lower protrusion which are matched with the outer protrusions are arranged at two ends of the bottom of the upper cover, the lower protrusion is used for extruding the sealing strip to enable the sealing strip to deform to block gaps, an accommodating groove is formed between the L-shaped buckle and the lower protrusion, a slot which is connected with the partition plates is formed in one side, away from the accommodating groove, of the lower protrusion, a sealing ring is arranged on the inner side wall of the side plates, and the side plates are fixed on the side walls of the bottom shell and the upper cover through a plurality of screws; the upper cover and the bottom shell are fixed in a clamping and hooking mode through the L-shaped buckles and the outer bulges, and the sealing strips are extruded through the downward pressing of the lower bulges while being fixed, so that the sealing strips can deform, and the deformed sealing strips can block gaps between the outer bulges and the lower bulges, so that water is prevented from permeating from the gaps; the sealing ring is added on the inner wall of the side plate to make up the time drop during the saw cutting of the upper cover and the bottom shell; abandon the riveting copper post, directly change the copper post of installing on the bottom diapire in the bottom.

Specifically, the section of the sealing groove is U-shaped.

Specifically, the section of the sealing strip is circular.

Specifically, the back of the outer bulge is provided with a first guide inclined plane connected with the sealing groove.

Specifically, one side of the lower bulge facing the accommodating groove is provided with a second guide inclined surface.

Specifically, the cross section of the outer protrusion is in a right trapezoid shape, and the cross section of the lower face of the L-shaped buckle is in a right trapezoid shape.

Specifically, the bottom of copper post is equipped with the screw rod, be equipped with a plurality of second internal thread grooves with screw rod complex in the bottom shell on the bottom wall.

Specifically, the copper column is a hexagonal copper column.

Specifically, the thickness of the sealing ring is not more than 2 mm.

The invention has the beneficial effects that:

according to the high-power waterproof switch power supply box, the bottom shell and the upper cover are fixed in a hook type fixing mode through the L-shaped buckles, the lower bulges can extrude the sealing strips clamped and fixed in the sealing grooves when the upper cover is pressed down, the sealing strips deform, gaps between the outer bulges and the lower bulges are blocked by the deformed sealing strips, water cannot permeate into the gaps, and the sealing performance between the upper cover and the bottom shell is guaranteed.

Secondly, when the high-power waterproof switch power supply box operates at high temperature, expansion change is generated in the switch power supply box, the upper cover and the bottom shell can be fixed more and more tightly in a clamping and hooking mode of the L-shaped buckle and the outer bulge, and tripping is avoided.

Thirdly, according to the high-power waterproof switching power supply box, the sealing ring is additionally arranged on the side plate, the length difference generated when the upper cover and the bottom shell are sawed is compensated by the sealing ring, and gaps among the upper cover, the bottom shell and the side plate are sealed by chickens.

Fourthly, the high-power waterproof switching power supply box abandons a rivet copper column and is replaced by the copper column which can be arranged on the inner bottom wall of the bottom cover, and the bottom cover does not need to be penetrated during installation of the copper column.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Figure 1 is a schematic perspective view of a conventional high-power switching power supply box,

figure 2 is a schematic perspective view of the present invention,

figure 3 is a disassembled exploded view of the present invention,

FIG. 4 is a schematic structural view illustrating the case where the upper lid and the bottom case are not fixed together,

figure 5 is an enlarged view at a in figure 4,

FIG. 6 is a schematic structural view of the upper cover and the bottom case after being fixed,

FIG. 7 is an enlarged view at B in FIG. 6;

reference numerals: the bottom shell comprises a bottom shell 1, an outer protrusion 11, a first guide inclined surface 111, a partition plate 12, a sealing groove 13, a sealing strip 14, a second inner thread groove 15, an upper cover 2, an L-shaped buckle 21, a lower protrusion 22, a second guide inclined surface 221, a containing groove 23, an unfilled groove 24, a side plate 3, a sealing ring 31, a copper column 4, a first inner thread groove 41 and a screw rod 42.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

As shown in fig. 2 to 7, a high power waterproof switching power supply box includes: bottom shell 1, upper cover 2 and two curb plates 3, the both ends at bottom shell 1 top all are equipped with outer arch 11 and the baffle 12 that the interval set up, be equipped with seal groove 13 between outer arch 11 and the baffle 12, the inherent sealing strip 14 of seal groove 13 inside callipers, be equipped with on the interior diapire of bottom shell 1 and dismantle and be used for fixed PCB's copper post 4, first interior thread groove 41 has been seted up at copper post 4's top, the both ends of upper cover 2 bottom all are equipped with outer arch 11 complex L type buckle 21 and lower arch 22, lower arch 22 is used for extruding sealing strip 14, make sealing strip 14 produce deformation and block up the gap, holding tank 23 has been formed between L type buckle 21 and the lower arch 22, one side that holding tank 23 was kept away from to lower arch 22 is equipped with the scarce groove 24 that links up with baffle 12, be equipped with sealing washer 31 on the inside wall of curb plate 3, curb plate 3 passes through a plurality of screws to be fixed on the lateral wall of bottom shell 1 and upper cover 2.

The working principle is that the bottom shell 1 and the upper cover 2 are fixed in a clamping and hooking mode through the L-shaped buckle 21 and the outer bulge 11, when the upper cover 2 is pressed down, the lower bulge 22 can extrude the sealing strip 14 clamped in the sealing groove 13, so that the sealing strip 14 is deformed, the deformed sealing strip 14 blocks a gap between the outer bulge 11 and the lower bulge 22, water cannot permeate into the gap due to the water entering, and the sealing performance between the upper cover 2 and the bottom shell 1 is ensured; pack into drain pan 1 and upper cover 2 with curb plate 3 through the screw on, utilize the sealing washer 31 on the curb plate 3 to mend the length drop that produces when sawing upper cover 2 and drain pan 1, seal up the gap between upper cover 2, drain pan 1 and the curb plate 3 through sealing washer 31, change riveting copper post 4 into the copper post 4 of built-in on the bottom wall in drain pan 1, do not pierce through drain pan 1 during the installation of this copper post 4, consequently can not make water infiltration.

Preferably, as shown in fig. 1, the side plates 3 are originally mounted on the upper cover 2 and the bottom case 1 by four screws, the height of the upper cover 2 is small, and the height of the bottom case 1 is large, so that it is obviously not enough to tighten the side plates 3 by only two screws on the bottom case 1, and thus the number of screws for fixing the bottom case 1 can be increased to six, four are distributed in a rectangular shape, and the remaining two are mounted at the bottom end of the side wall of the bottom case 1 (as shown in fig. 3).

Preferably, when the sealing strip 14 is installed, since there is uncertainty about the length dimension of the sealing strip 14 pressed and clamped in the sealing groove 13, the length of the sealing strip 14 needs to exceed the length of the upper cover 2, and after the sealing strip 14 is clamped in the sealing groove 13, the protruding parts of the sealing strip 14 and the two sides of the upper cover 2 are cut off, so that the length dimension of the sealing strip 14 can be matched with the sealing groove 13.

In one embodiment, the seal groove 13 is U-shaped in cross-section.

In one embodiment, the sealing strip 14 is circular in cross-section; after the circular sealing strip 14 is clamped and extruded in the U-shaped sealing groove 13, the upper end of the sealing strip 14 is arc-shaped, so that the lower protrusion 22 can be conveniently guided to be inserted.

In one embodiment, the back of the outer protrusion 11 is provided with a first guiding inclined surface 111 engaged with the sealing groove 13; the first guide slope 111 can guide the moving direction of the deformed weather strip 14 after the weather strip 14 is pressed by the lower protrusion 22.

In one embodiment, the lower protrusion 22 is provided with a second guide slope 221 toward one side of the receiving groove 23; this presses the lower projection 22 against the right half of the weather strip 14, so that the left side of the weather strip 14 is deformed in a moving manner.

In one embodiment, the cross section of the outer protrusion 11 is a right trapezoid, and the cross section of the lower surface of the L-shaped buckle 21 is a right trapezoid; this provides a ramp for guiding both the outer protrusion 11 and the L-shaped catch 21.

In a specific embodiment, the bottom of the copper column 4 is provided with a screw rod 42, and the inner bottom wall of the bottom shell 1 is provided with a plurality of second inner thread grooves 15 matched with the screw rod 42; the screw rod 42 is adopted to quickly fix the copper column 4 in the second internal thread groove 15, so that the installation is convenient and fast, and the bottom shell 1 does not need to be punched.

In one embodiment, the copper pillars 4 are hexagonal copper pillars; the hexagonal copper cylinder is convenient to install with the spanner.

In one embodiment, the thickness of the seal ring 31 does not exceed 2 mm; the excessive thickness increases the material cost, and the thickness of the sealing ring 31 only needs to be enough to compensate the length drop generated when the upper cover 2 and the bottom shell 1 are sawed.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a high-power waterproof switching power supply box which characterized in that includes: the improved PCB sealing structure comprises a bottom shell (1), an upper cover (2) and two side plates (3), wherein outer bulges (11) and partition plates (12) are arranged at two ends of the top of the bottom shell (1) at intervals, a sealing groove (13) is arranged between the outer bulges (11) and the partition plates (12), sealing strips (14) are fixed in the sealing groove (13) in a clamping manner, copper columns (4) which can be detached and are used for fixing a PCB are arranged on the inner bottom wall of the bottom shell (1), a first inner thread groove (41) is formed in the top of each copper column (4), L-shaped buckles (21) and lower bulges (22) which are matched with the outer bulges (11) are arranged at two ends of the bottom of the upper cover (2), the lower bulges (22) are used for extruding the sealing strips (14) to deform and block gaps, and accommodating grooves (23) are formed between the L-shaped buckles (21) and the lower bulges (22), one side that holding tank (23) was kept away from in arch (22) down is equipped with scarce groove (24) that links up with baffle (12), be equipped with sealing washer (31) on the inside wall of curb plate (3), curb plate (3) are fixed on the lateral wall of drain pan (1) and upper cover (2) through a plurality of screws.

2. The high-power waterproof switching power supply box according to claim 1, characterized in that: the section of the sealing groove (13) is U-shaped.

3. The high power waterproof switching power supply box of claim 2, characterized in that: the section of the sealing strip (14) is circular.

4. The high power waterproof switching power supply box of claim 3, characterized in that: the back of the outer bulge (11) is provided with a first guide inclined plane (111) connected with the sealing groove (13).

5. The high power waterproof switching power supply box of claim 4, characterized in that: one side of the lower bulge (22) facing the accommodating groove (23) is provided with a second guide inclined surface (221).

6. The high-power waterproof switching power supply box according to claim 1, characterized in that: the cross section of the outer bulge (11) is in a right trapezoid shape, and the cross section of the lower face of the L-shaped buckle (21) is in a right trapezoid shape.

7. The high-power waterproof switching power supply box according to claim 1, characterized in that: the bottom of copper post (4) is equipped with screw rod (42), be equipped with a plurality of second internal thread grooves (15) with screw rod (42) complex on the bottom wall in drain pan (1).

8. The high power waterproof switching power supply box of claim 7, characterized in that: the copper column (4) is a hexagonal copper column.

9. The high-power waterproof switching power supply box according to claim 1, characterized in that: the thickness of the sealing ring (31) is not more than 2 mm.