CN218822579U - Water meter waterproof structure - Google Patents

Abstract

The application relates to the field of water meter packaging, in particular to a water meter waterproof structure which comprises a shell, a window and a cavity, wherein the window and the cavity are arranged on the shell, the window is communicated with the cavity and penetrates through the shell, a sealing gasket and a PCB (printed circuit board) are arranged in the cavity, the sealing gasket comprises an annular frame and an annular hole which penetrates through the annular frame, the annular frame is fixedly connected to the shell, and the annular hole is over against the window; the PCB board includes circuit board body, power and display screen with circuit board body electric connection, the power is connected in circuit board body same side with the display screen, circuit board body fixed connection is in shell and power, the display screen is located the ring hole, the window one end is kept away from in the annular frame to the circuit board body butt, it separates with other parts of cavity to set up power and display screen in the annular frame with the PCB board, improve water-proof effects, and glue can not ooze to power and display screen when the encapsulating on, can reduce the condition that the bubble appears in the oozing glue on the display screen.

Description

Water meter waterproof structure

Technical Field

The application relates to a water gauge encapsulation field especially relates to a water gauge waterproof construction.

Background

Along with the development of science and technology, the intelligent demand of water gauge is higher and higher, and ultrasonic digital display water gauge uses more and more extensively. Generally for avoiding influencing the electronic component in the water gauge, the waterproof sealing performance requirement of water gauge is higher, and present water gauge mainly adopts the integral type, and its water gauge shell uses sealing washer seal installation, and the inside circuit board of shell generally uses glue fixed seal, and whether the workman is in the observation process who looks over on the display screen and produce the bubble because of the encapsulating, makes the glue of pouring overflow easily, has reduced waterproof sealing effect, still can make glue overflow on other positions of shell, reduces the aesthetic property.

SUMMERY OF THE UTILITY MODEL

In order to improve the water-proof effects of water gauge, this application provides a water gauge waterproof construction.

The application provides a water gauge waterproof construction adopts following technical scheme:

a water meter waterproof structure comprises a shell, a window and a cavity, wherein the window is formed in the shell, the window is communicated with the cavity and penetrates through the shell, a sealing gasket and a PCB are arranged in the cavity, the sealing gasket comprises an annular frame and an annular hole which penetrates through the annular frame, the annular frame is fixedly connected to the shell, and the annular hole is over against the window; the PCB board includes circuit board body, and with circuit board body electric connection's power and display screen, the power is connected in circuit board body same side with the display screen, and circuit board body fixed connection is located the ring opening in shell and power, display screen, and the window one end is kept away from in the ring frame to the circuit board body butt.

Through adopting above-mentioned technical scheme, the circuit board body in the annular frame and the PCB board in the sealed pad all with shell fixed connection, window one end is kept away from at the annular frame to the circuit board body butt, power and display screen on the circuit board body are located the ring hole, separate power and display screen and other spaces in the cavity through annular frame and circuit board body, it oozes on the electric spare part of PCB board to reduce the water in the cavity, need not scribble waterproof glue and also can play good water-proof effects to power and display screen on the circuit board body.

Further preferably, the annular hole is internally provided with a first area, the part outside the annular hole and in the cavity is a second area, and the part in the second area and along the peripheral surfaces of the circuit board body and the annular frame is coated with a glue layer.

Through adopting above-mentioned technical scheme, in the second district and along circuit board body and annular frame butt department and circuit board body be located the outer peripheral face of second district on the coating glue layer, improve water-proof effects to on reducing the display screen of glue infiltration PCB board under the restriction of annular frame, thereby the condition of bubble appears on the reduction display screen.

Further preferably, a clamping assembly is connected between the shell and the annular frame and comprises a clamping strip and a clamping groove clamped with the clamping strip, the clamping strip is fixedly connected to the shell, the clamping groove is formed in the annular frame, or the clamping strip is fixedly connected to the annular frame, and the clamping groove is formed in the shell.

Through adopting above-mentioned technical scheme, carry out the draw-in groove through card strip, draw-in groove between shell and annular frame, the route of extension glue infiltration to first district from the second district to the time of extension glue infiltration to first district from the second district makes glue solidify before permeating to first district as far as possible, thereby can not ooze gluey bubble appearance on the further guarantee display screen.

Further preferably, the inner wall of the cavity is provided with a mounting groove, and a wire clamp used for fixing a welding lead on the PCB is clamped in the mounting groove.

Through adopting above-mentioned technical scheme, set up the ply-yarn drill and be used for binding the lead wire on the PCB board, avoid the mixed and disorderly influence encapsulating of lead wire, the later maintenance of still being convenient for.

Preferably, a supporting strip is fixedly arranged on the side wall of the window, and one end, far away from the cavity, of the supporting strip is abutted with a glass protecting plate for covering the window.

Through adopting above-mentioned technical scheme, set up the support bar in the window, butt glass backplate on the support bar prevents that the dust from being stained with on the PCB board through the window, glass backplate and support bar butt set up convenient to detach and maintain and change power and display screen, and the transparency of glass backplate can make the people see through the water gauge numerical value on the glass backplate reading display screen in addition.

Further preferably, a protective cover for covering the power supply is fixedly arranged at one end of the glass protective plate close to the cavity.

Through adopting above-mentioned technical scheme, set up the protective cover on the glass backplate, play the dustproof effect of protection to the power, can also cover the power, play pleasing to the eye effect.

Further preferably, the support bar is internally provided with a pin hole in a through mode, one end, close to the support bar, of the glass protection plate is fixedly connected with a plug pin used for plugging the pin hole, and the plug pin is connected with the pin hole in an interference fit mode.

Through adopting above-mentioned technical scheme, through the interference fit of bolt and pinhole between glass backplate and the support bar, play the anticreep effect to the glass backplate.

It is further preferred that the housing is hinged with a flap for closing an opening at a side of the window remote from the cavity.

Through adopting above-mentioned technical scheme, flip is used for protecting the glass apron, avoids appearing the condition that the junk smashes the glass backplate and damages display screen and power.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the application, the annular frame is arranged to separate the power supply and the display screen in the PCB from other parts of the cavity, so that glue cannot seep into the power supply and the display screen during glue pouring, and the condition that bubbles appear in the seeped glue on the display screen can be reduced;

2. in the further arrangement of the application, the annular frame and the shell are clamped through the clamping groove and the clamping strip, the path and time of glue permeating from the second area to the first area are prolonged, the glue is solidified before permeating into the first area, the glue cannot permeate into the display screen, and therefore bubbles do not need to be checked after glue pouring;

3. in this application further sets up, sets up glass backplate and flip, protects display screen and the power at the window department, improves the safety in utilization.

Drawings

Figure 1 is an exploded schematic view of a water meter water-proof structure;

FIG. 2 is a schematic perspective view of the housing;

FIG. 3 is a schematic bottom view of the structure of FIG. 2;

FIG. 4 is a schematic perspective view of a PCB;

FIG. 5 is a schematic perspective view of the gasket;

FIG. 6 is a schematic sectional elevation view of the water meter waterproofing structure;

FIG. 7 is a schematic perspective view of a glass cover plate;

FIG. 8 is an enlarged schematic view of A in FIG. 2;

fig. 9 is a perspective view of the assembled water meter waterproofing structure.

Description of reference numerals: 1. a housing; 10. a cavity; 11. a window; 12. a hinge slot; 14. a supporting strip; 15. a pin hole; 16. mounting grooves; 17. clamping the strip; 18. a threaded hole; 2. a cover is turned; 3. a PCB board; 31. a circuit board body; 32. a through hole; 33. a display screen; 34. a power source; 4. a line card; 5. a glass guard plate; 51. a cover plate; 52. a bolt; 53. a protective cover; 6. a gasket; 61. an annular frame; 62. a card slot; 63. annular ring; 7. a first region; 8. a second region; 9. and (6) a glue layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a water meter waterproof structure, as shown in figure 1, which comprises a shell 1, a glass protection plate 5, a flip cover 2, a sealing gasket 6, a PCB 3 and a line card 4.

For the shell 1, as shown in fig. 2 and fig. 3, a cavity 10 and a window 11 are formed in the shell 1, the opening of the cavity 10 is downward, the opening of the window 11 is upward, the cavity 10 is communicated with the window 11 up and down, the sealing gasket 6, the PCB 3 and the wire clip 4 are arranged in the cavity 10, the glass protection plate 5 is arranged in the window 11, the flip cover 2 is hinged to the shell 1 and used for covering the opening on the upper side of the window 11, and the glass protection plate 5 and the flip cover 2 both play a role in protecting the PCB 3 in the cavity 10. In this embodiment, the housing 1 may be integrally formed with the cavity 10 and the window 11 during the production process, and in addition, the housing 1 needs to be provided with a mounting hole for inserting a bolt and fixing the housing 1 to a pipeline, a ground or a wall.

In the embodiment, the upper side wall of the cavity 10 is provided with the mounting groove 16 and the threaded hole 18, the wiring card 4 is clamped in the mounting groove 16, and the wire clamp 4 is used for fixing a lead wire welded on the PCB 3 and bundling the lead wire, so that disorder is avoided, and later maintenance is facilitated;

in addition, be connected with screw hole 18 through self tapping screw and fix PCB board 3 to on the last lateral wall of cavity 10, the self tapping screw can select for use M2 self tapping screw, and to PCB board 3, as shown in fig. 4, including circuit board body 31, power 34, display screen 33, power 34 and display screen 33 all install in circuit board body 31 upper end and with circuit board body 31 electric connection, power 34 and display screen 33 all just face window 11, circuit board body 31 then covers the downside opening of window 11. The power supply 34 is electrified to the circuit board body 31 and supplies power to the display screen 33, numerical values such as the flow rate and the flow rate of water can be displayed on the display screen 33, the circuit board body 31 is fixed by adopting the self-tapping screws, through holes 32 for penetrating the screws do not need to be machined in advance, and the situation that the circuit board body 31 cannot be installed due to deviation between the machined through holes 32 and the threaded holes 18 during installation is avoided.

For the sealing gasket 6, as shown in fig. 5, the sealing gasket includes an annular frame 61 and an annular hole 63 penetrating the annular frame 61, the annular frame 61 is fixedly connected to the upper side wall of the cavity 10, the annular hole 63 is opposite to the window 11, the annular frame 61 and the housing 1 are connected by a clamping assembly, the clamping assembly includes a clamping strip 17 and a clamping groove 62 clamped to each other, the clamping strip 17 is fixedly connected to the housing 1, and the clamping groove 62 is opened on the annular frame 61, in another embodiment, the clamping strip 17 is fixedly connected to the annular frame 61, and the clamping groove 62 is opened on the housing 1.

Specifically, the embodiment that the clip strip 17 is fixedly connected to the housing 1 and the clip groove 62 is opened on the annular frame 61 is expanded, in this embodiment, the opening of the clip groove 62 faces upward and is opened on the entire circumference of the annular frame 61, the clip strip 17 adapted to the clip groove 62 is fixedly arranged on the upper side wall of the cavity 10, the clip strip 17 is arranged at the lower side opening edge of the window 11 and the clip strip 17 can be integrally formed with the housing 1.

In this embodiment, the cross section of the vertical direction of the slot 62 is U-shaped, and in other embodiments, the cross section of the vertical direction of the slot 62 may also be V-shaped, W-shaped, arc-shaped, etc., and correspondingly, the lower end of the clip strip 17 may be adapted to the cross section of the slot 62.

In another embodiment (not shown), when the fastening strip 17 is fixed to the ring frame 61 and the fastening groove 62 is opened on the housing 1, the fastening groove 62 is opened downward and is opened at the lower side opening edge of the window 11 over the whole circumference, and the fastening strip 17 is fixed to the upper end of the ring frame 61 and can be integrally formed with the ring frame 61.

When the ring frame 61 and the PCB 3 are both fixed on the upper side wall of the cavity 10, the ring frame 61 is installed before the PCB 3, and after the PCB 3 is fixed with the housing 1, the circuit board 31 in the PCB 3 abuts against one end of the ring frame 61 away from the window 11, and the power supply 34 and the display screen 33 on the circuit board 31 are located in the ring hole 63 of the ring frame 61.

Specifically, ring frame 61 is connected through the joint subassembly with shell 1 earlier, on fixed the lateral wall on cavity 10 through the self tapping screw with circuit board body 31 again, circuit board body 31 upper end butt reaches ring frame 61 lower extreme and plays certain supporting role to the ring board, at the butt in-process, circuit board body 31 and with power 34, display screen 33 stretches into in the annular ring 63, circuit board body 31 covers the annular ring 63 downside opening and seals, because the annular ring 63 is just to window 11, thereby circuit board body 31 also covers the closure with window 11 downside opening, thereby to power 34 under circuit board body 31 and ring frame 61 effect, display screen 33 plays certain water-proof effects.

After PCB board 3 and annular frame 61 installation are accomplished, circuit board body 31 and annular frame 61 separate into the first district 7 in the annular ring 63 with cavity 10, and the second district 8 that just is located cavity 10 outside the annular ring 63, as shown in figure 6, scribble gluey water layer 9 on the outer peripheral face along circuit board body 31 and annular frame 61 in second district 8, further improve power 34 in PCB board 3, display screen 33 water-proof effects, compare and all carry out the encapsulating and handle and play water-proof effects to PCB board 3 whole surface in current water gauge waterproof construction, adopt local encapsulating mode in this embodiment, reduce the encapsulating use amount, reduce the encapsulating cost, improve encapsulating efficiency.

In addition, the display screen 33 generally adopts a liquid crystal screen, the glue filling on the display screen 33 can cause bubbles to appear on the liquid crystal surface, and the glue filling mode locally can avoid the glue on the display screen 33, so that the bubbles on the liquid crystal surface are reduced. And the encapsulating also can stretch into in first district 7 through the gap in the second district 8, also can be to the production bubble influence on the liquid crystal face, and foretell joint subassembly then can solve the infiltration problem to a great extent.

In particular, the provision of the catching groove 62 extends the path and the penetration time for glue to penetrate from the second region 8 through the slit into the first region 7, so that the glue has set before penetrating into the first region 7.

Therefore, the lower end of the sealing gasket 6 and the upper end of the circuit board body 31 can be provided with corresponding clamping components or other structures capable of prolonging the glue permeation time so as to prevent the glue permeation as much as possible.

In this embodiment, the glue used for glue filling is AB jelly, and the ratio of water to pectin in AB jelly is 1.

As shown in fig. 7 and 8, a supporting bar 14 is fixedly arranged on the side wall of the window 11, one end of the supporting bar 14, which is far away from the cavity 10, abuts against the glass protecting plate 5 and covers the opening on the upper side of the window 11, a pin hole 15 is formed in the supporting bar 14 in a penetrating manner, one end of the glass protecting plate 5, which is close to the supporting bar 14, is fixedly connected with a plug 52 for plugging the pin hole 15, and the plug 52 is connected with the pin hole 15 in an interference fit manner. In this embodiment, but support bar 14 and shell 1 integrated into one piece, pinhole 15 is seted up on support bar 14 with lining up from top to bottom, then fixed and pinhole 15 complex bolt 52 at glass backplate 5 lower extreme, and interference fit's connected mode can reduce the condition that glass backplate 5 breaks away from on support bar 14, and glass backplate 5 can play dustproof effect to PCB board 3.

In addition, the transparent glass material is adopted, so that the numerical value on the display screen 33 can be conveniently observed and read from the upper part of the window 11.

A protective cover 53 for covering the power supply 34 is fixedly arranged at one end of the glass protection plate 5 close to the cavity 10. Specifically, the protective cover 53 is fixed at the lower end of the glass protecting plate 5, after the glass protecting plate 5 is installed in the window 11, the protective cover 53 is sleeved on the periphery of the power supply 34, the protective cover 53 is made of opaque material, and the power supply 34 is covered by the protective cover 53 to improve the appearance.

As shown in fig. 9, the flip 2 is hinged to the housing 1 and the flip 2 can close the opening of the window 11 at the side away from the cavity 10. Specifically, a hinge groove 12 is formed in the right end of the housing 1, the flip cover 2 is hinged to the hinge groove 12 through a hinge shaft, and when the flip cover 2 closes the opening in the upper side of the window 11, the flip cover 2 protrudes relative to the upper end face of the housing 1, so that the flip cover 2 can be conveniently turned manually. The flip cover 2 is made of plastic materials, can protect the glass protection plate 5, and avoids falling objects from smashing the glass protection plate 5 and causing the damage of the PCB 3 below the window 11.

The installation principle of the water gauge waterproof construction that this embodiment discloses does:

firstly, inserting a glass protective plate 5 and a supporting bar 14 and covering an opening at the upper side of a sealed window 11, and then hinging a flip cover 2 with a shell 1;

secondly, clamping the sealing gasket 6 with the shell 1, abutting the PCB 3 with the welded leads against the lower end face of the annular frame 61, fixing the PCB 3 by using self-tapping screws, and positioning the power supply 34 and the display screen 33 in an annular hole 63;

thirdly, fixing the lead through a wire clamp 4, and performing a function test on the PCB 3;

finally, AB jelly is poured into the second zone 8 to achieve sealing.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A water meter waterproof structure comprises a shell (1), a window (11) and a cavity (10), wherein the window (11) is arranged on the shell (1), the window (11) is communicated with the cavity (10) and penetrates through the shell (1), and the water meter waterproof structure is characterized in that a sealing gasket (6) and a PCB (printed circuit board) are arranged in the cavity (10), the sealing gasket (6) comprises an annular frame (61) and an annular hole (63) which is arranged in the annular frame (61) in a penetrating manner, the annular frame (61) is fixedly connected to the shell (1), and the annular hole (63) is opposite to the window (11); PCB board (3) include circuit board body (31), with circuit board body (31) electric connection's power (34) and display screen (33), power (34) with display screen (33) connect in same one side of circuit board body (31), circuit board body (31) fixed connection in shell (1) just power (34) display screen (33) are located in annular ring (63), circuit board body (31) butt in annular frame (61) is kept away from window (11) one end.

2. A water meter water-proof structure as claimed in claim 1, wherein the inside of the annular hole (63) is a first region (7), the part outside the annular hole (63) and in the cavity (10) is a second region (8), and the part in the second region (8) and along the outer peripheral surfaces of the circuit board body (31) and the annular frame (61) is coated with a glue layer (9).

3. A water gauge waterproof construction, according to claim 1 or 2, characterized in that, shell (1) with be connected with the joint subassembly between ring frame (61), the joint subassembly including card strip (17), with draw-in groove (62) of card strip (17) joint, card strip (17) fixed connection in on shell (1) just draw-in groove (62) are seted up on ring frame (61), or card strip (17) fixed connection in on ring frame (61) just draw-in groove (62) are seted up on shell (1).

4. A water meter water-proof structure according to claim 1, characterized in that a mounting groove (16) is formed on the inner wall of the cavity (10), and a wire clip (4) for fixing a lead wire welded on the PCB (3) is clamped in the mounting groove (16).

5. A water meter water-proof structure as claimed in claim 1, characterized in that a support bar (14) is fixed on the side wall of the window (11), and one end of the support bar (14) far from the cavity (10) is abutted with a glass protecting plate (5) for covering the window (11).

6. A water meter waterproofing structure according to claim 5, wherein a protecting cover (53) for covering said power supply (34) is fixedly provided at an end of said glass protecting plate (5) near said cavity (10).

7. A water meter waterproof structure according to claim 5 or 6, wherein a pin hole (15) is formed in the support bar (14) in a penetrating manner, a plug pin (52) for plugging the pin hole (15) is fixedly connected to one end, close to the support bar (14), of the glass protecting plate (5), and the plug pin (52) is connected with the pin hole (15) in an interference fit manner.

8. A water meter water-proof structure as claimed in claim 1, characterized in that a flip cover (2) is hinged to the housing (1) for closing an opening on a side of the window (11) away from the cavity (10).

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