CN212256420U - Entrance guard terminal of lid installation behind loudspeaker - Google Patents

Abstract

The utility model provides an entrance guard terminal installed on a rear cover of a loudspeaker, which comprises a front shell, a rear cover and a display screen, wherein the display screen is arranged on the front shell, the rear cover is covered at the rear side of the display screen and is connected with the front shell, the rear cover is provided with a sound outlet hole along the thickness direction, the periphery of the sound outlet hole of the rear cover is provided with a limiting ring wall, and the periphery of the limiting ring wall of the rear cover is provided with an installation outer ring wall; the entrance guard terminal still includes loudspeaker and closing cap, and loudspeaker setting is in spacing rampart, and it has sealed glue to fill between the edge of loudspeaker and the spacing rampart, and the closing cap lid closes the rear side at loudspeaker and with back lid fixed connection, and it has sealed glue to fill between the edge of closing cap and the installation rampart. Through the great voice coil loudspeaker that thickness direction arranged towards the rear side, it is better not only to do benefit to frivolous design and sound quality, and it has sealed glue to fill between edge and the spacing rampart through loudspeaker when connecting to arrange to and seal up the closing cap at the rear side of loudspeaker and through sealed glue, form comparatively inclosed sound chamber then, it can further improve tone quality.

Description

Entrance guard terminal of lid installation behind loudspeaker

Technical Field

The utility model relates to a security protection entrance guard field especially relates to an entrance guard terminal of flat installation of circuit board.

Background

The space security intercom system comprises an outdoor unit, an indoor unit, a power supply, an electric control lock, a door closer and the like, wherein the indoor unit or the outdoor unit adopts an entrance guard terminal for realizing intercom, and then the communication means is utilized to realize the opening and closing control function and the monitoring function of the electric lock.

Entrance guard's terminal generally is provided with modules such as display screen, camera, microphone and the module of punching the card, along with the high integration of device to and the trend of more and more frivolous fuselage, the event need follow device structural layout and go on flat optimization, makes entrance guard's terminal have thinner thickness. Under thinner fuselage design trend, also need consider the radiating problem of master control to and the position problem that sets up that needs the microphone, among the prior art, the microphone generally sets up in the front side, just so disturbs arranging of display screen, and the influence accounts for the screen ratio, in addition, arranging of loudspeaker in addition, adopts side sound out among the prior art, and because thinner fuselage, make the size of loudspeaker receive the restriction, influence the whole quality of sound then.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an entrance guard terminal of lid installation behind big sound circle loudspeaker.

In order to realize the purpose of the utility model, the utility model provides an entrance guard terminal installed on the rear cover of a loudspeaker, which comprises a front shell, a rear cover and a display screen, wherein the display screen is arranged on the front shell, the rear cover covers the rear side of the display screen and is connected with the front shell, the rear cover is provided with a sound outlet along the thickness direction, the rear cover is provided with a limit ring wall at the periphery of the sound outlet, and the rear cover is provided with an installation outer ring wall at the periphery of the limit ring wall; the entrance guard terminal still includes loudspeaker and closing cap, and loudspeaker setting is in spacing rampart, and it has sealed glue to fill between the edge of loudspeaker and the spacing rampart, and the closing cap lid closes the rear side at loudspeaker and with back lid fixed connection, and it has sealed glue to fill between the edge of closing cap and the installation rampart.

It is visible by above-mentioned scheme, through will going out the sound hole setting and cover after, the event goes out the area of sound hole, quantity all has great arrangement space, owing to be along the loudspeaker that thickness direction arranged towards the rear side, event loudspeaker can adopt the loudspeaker of great voice coil loudspeaker voice coil, do not influence whole frivolous design, and the sound quality of big voice coil loudspeaker is better, it has sealed glue to fill between edge and the spacing rampart through loudspeaker when connecting to arrange, and close the closing cap lid at the rear side of loudspeaker and seal through sealed glue, form comparatively inclosed sound chamber then, it can improve tone quality further.

The inner side of the outer installation ring wall of the rear cover is provided with an installation inner ring wall, an installation ring groove is formed between the outer installation ring wall and the inner installation ring wall, the edge of the sealing cover is positioned in the installation ring groove, and the installation ring groove is filled with sealing glue.

The further proposal is that the wall of the limit ring encloses a circular installation cavity, and the horn is positioned in the circular installation cavity; the mounting ring groove is arranged in a rectangular extending mode, and the sealing cover is arranged in a rectangular mode.

Therefore, through the arrangement of the mounting ring groove and the sealant, stable positioning is provided for the edge of the sealing cover, and the airtightness of the sound cavity is improved.

In a further scheme, the inner side of the limiting ring wall of the rear cover is provided with a bearing step, and the horn is adjacent to the bearing step.

Therefore, the bearing step provides stable support for the loudspeaker, and the sealing glue can also provide a stable support foundation.

The rear cover is provided with a fixing hole at the outer side of the mounting outer ring wall, the sealing cover is provided with a positioning hole, and the connecting screw penetrates through the positioning hole to be connected with the fixing hole.

Therefore, the rear cover is installed and fixed through the connecting screws and is connected on the outer side of the outer installation ring wall, namely the connecting screws are located on the outer side of the sealant, so that the continuity of the sealant is not affected, and the tightness of the sound cavity is guaranteed.

The sealing cover comprises a bottom wall and a peripheral wall arranged on the periphery of the bottom wall, sealing glue is filled between the edge of the peripheral wall and the outer installation ring wall, and the bottom wall is adjacent to the loudspeaker.

Therefore, the sealing cover with the bottom wall and the peripheral wall covers the rear side of the loudspeaker, the edge of the peripheral wall is arranged in a sealing mode through the sealing glue, and the bottom wall is adjacent to the loudspeaker and provides supporting force for the rear end of the loudspeaker.

In a further aspect, the bottom wall and the horn are connected by an adhesive.

The further scheme is that the bottom wall is provided with a positioning groove, and the bonding piece is positioned in the positioning groove.

Still further, the bottom wall is provided with reinforcing ribs.

From top to bottom, be connected through bonding piece between diapire and the loudspeaker, not only for providing flexible connection between the two to set up through the strengthening rib of diapire, and also provide good support nature for loudspeaker.

The further proposal is that the edge of the sealing cover and the outer mounting ring wall are provided with a threading hole in a penetrating way, and the connecting line of the loudspeaker passes through the threading hole.

Therefore, the connecting line of the loudspeaker passes through the arrangement of the threading holes, the connecting layout of the loudspeaker is optimized, and the air tightness of the sound cavity is not influenced.

Drawings

Fig. 1 is the structure diagram of the embodiment of the access control terminal of the utility model.

Fig. 2 is the structure diagram of the access control terminal of the utility model under the back visual angle.

Fig. 3 is an exploded view of an embodiment of the access control terminal of the present invention.

Fig. 4 is an exploded view of a cover and a speaker in an embodiment of the access control terminal of the present invention.

Figure 5 is the utility model discloses entrance guard terminal embodiment is located the cross-sectional view of loudspeaker department.

Figure 6 is the utility model discloses entrance guard terminal embodiment is located the structure chart of master control circuit board department.

Fig. 7 is an exploded view of main control circuit board and loudspeaker in the embodiment of the access control terminal of the utility model.

Figure 8 is the utility model discloses entrance guard terminal embodiment is located the cross-sectional view of main control chip department.

Figure 9 is the cross-sectional view that the embodiment of the entrance guard terminal of the utility model is located L type pick-up hole department.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Referring to fig. 1 to 4, entrance guard terminal 1 includes preceding shell 2, back lid 3, display screen 11, loudspeaker 13, closing cap 14, link plate 4, main control circuit board 17 and panel 15, preceding shell 2 is the framework setting, display screen 11 sets up in the front on preceding shell 2 is based on thickness direction Z's front side, transparent panel has still been arranged to the front side of display screen 11 lid, main control circuit board 17 sets up in the rear side of display screen 11 and is connected with preceding shell 2, back lid 3 covers the rear side at main control circuit board 17 and is connected with preceding shell 2, preceding shell 2 is provided with power key 12 at the top of vertical direction Y.

The rear cover 3 is provided with two sound outlet hole groups on two transverse sides, the sound outlet hole groups are provided with a plurality of sound outlet holes 311 along the thickness direction, the sound outlet holes 311 are arranged towards the rear side, the rear cover 3 is provided with a limiting ring wall 312 on the periphery of the sound outlet holes 311, the rear cover 3 is provided with an installation inner ring wall 315 on the periphery of the limiting ring wall 312, the rear cover 3 is provided with an installation outer ring wall 314 on the periphery of the installation inner ring wall 315, the limiting ring wall 312, the installation inner ring wall 315 and the installation outer ring wall 314 are both located on the inner end face of the rear cover 3, an installation ring groove is formed between the installation outer ring wall 314 and the installation inner ring wall 315, the installation ring groove is in rectangular extension arrangement, and the rectangular arrangement can be a rectangular rectangle with a right-angle.

Referring to fig. 4 and 5, the limiting ring wall 312 encloses a circular mounting cavity, the circular mounting cavity is located inside the mounting ring groove, the rear cover 3 is provided with a bearing step 318 on the inner side of the limiting ring wall 312, the horn 13 is arranged inside the limiting ring wall 312 and also located inside the circular mounting cavity, the horn 13 is adjacent to the bearing step 318, and a sealant 319 is filled between the edge of the housing of the horn 13 and the limiting ring wall 312.

The closing cap 14 is the rectangle setting, the closing cap 14 includes diapire 141 and the perisporium 142 of setting in diapire 141 periphery, diapire 141 is provided with a plurality of strengthening rib 145, a plurality of strengthening rib 145 staggered distribution, diapire 141 is provided with constant head tank 143 at the middle part, closing cap 14 lid closes the rear side at loudspeaker 13, the edge of perisporium 142 stretches into in the installation ring groove, the packing of installation ring groove is filled with sealed glue 320, sealed glue 320 is filled at the edge of diapire 142, between installation inner ring wall 315 and the installation outer ring wall 314, sealed glue 319 and sealed glue 320 can adopt common colloid such as silica gel to seal. The bottom wall 141 and the loudspeaker 13 are connected through the adhesive piece 146, the adhesive piece 146 is located in the positioning groove 143, along with sound production vibration of the loudspeaker 13, the loudspeaker 13 can be well supported through the bottom wall 141, and sound quality can be improved through sealing of the sealant 319 and the sealant 320 for sealing the sound cavity. The outer installation ring wall 314 and the inner installation ring wall 315 are provided with threading holes 316 in a penetrating manner, the peripheral wall 142 is provided with threading holes 143 in a penetrating manner, the threading holes 316 and the threading holes 143 are communicated along a straight line, and a connecting line of the loudspeaker 13 penetrates through the threading holes 316 and the threading holes 143 and then can be connected with the main control circuit board 17.

The rear cover 3 is provided with two fixing holes 317 on the outer side of the mounting outer annular wall 314, the cover 14 is provided with a positioning hole 144 on the outer side of the peripheral wall, and a connecting screw (not shown) passes through the positioning hole 144 to be connected with the fixing hole 317, so that the mounting and the fixed connection of the cover 14, the loudspeaker 13 and the rear cover are realized.

Referring to fig. 6 and 7, and with reference to fig. 4, the front housing 2 is provided with an installation position at the rear side of the display screen 11, the two opposite sides of the installation position of the front housing 2 are respectively provided with an installation component, the installation component includes an elastic abutting block 21 arranged on the front housing 2, a first clamping groove 22, a first receiving platform 23 and a second clamping groove 24, the elastic abutting block 21, the first clamping groove 22, the first receiving platform 23 and the second clamping groove 24 are sequentially arranged along an installation direction X, the installation direction X is parallel to the main control circuit board 17, in this embodiment, the two installation components are respectively located on two sides of a vertical direction Y, and the installation direction X is arranged along a horizontal direction. The elastic abutting block 21 extends along the installation direction X, the fixed end of the elastic abutting block 21 is fixedly connected with the front shell 2, and the free abutting end 211 can elastically move along the thickness direction Z.

First draw-in groove 22 is provided with first card edge 221, and second draw-in groove 24 is provided with second card edge 241, and first card edge 221 and second card edge 241 lie in first socket 23 and are close to one side of back lid 3 based on the thickness direction, and the bayonet socket of first draw-in groove 22 and the bayonet socket of second draw-in groove 24 set up towards the syntropy, and it all arranges towards elasticity butt piece 21, and the free butt end 211 of elasticity butt piece 21 is towards the bayonet socket of second draw-in groove 24.

The mounting assembly further comprises a second receiving platform 25 arranged on the front shell 2, the second receiving platform 25 being arranged between the elastic abutment block 21 and the first clamping groove 22 in the mounting direction X. The mounting assembly on one side further comprises a third slot 26 arranged on the front shell 2, the third slot 26 being located in the middle of the first receiving platform 23, the third slot 26 being arranged between the first slot 22 and the second slot 24 in the mounting direction X.

The main control circuit board 17 is provided with positioning components on two opposite sides, the two positioning components are located on two sides of the vertical direction Y, the positioning components include an abutting edge portion 171, a first locking groove 172, a bearing edge portion 173 and a locking edge portion 174 which are provided on the main control circuit board 17, and the abutting edge portion 171, the first locking groove 172, the bearing edge portion 173 and the locking edge portion 174 are sequentially arranged along the installation direction X. The abutting edge portion 171 is located at an edge of the main control circuit board 17, and the locking edge portion 174 is located at an edge of the other side of the main control circuit board 17. The positioning member on one side is also provided with a second lock groove 175 on the main control circuit board 17, the second lock groove 175 being provided between the first lock groove 172 and the locking edge portion 174 in the mounting direction X.

The main control circuit board 17 is mounted on the mounting position and is mounted by moving along the mounting direction X, the locking edge portion 174 is engaged with the second slot 24, the bearing edge portion 173 is adjacent to the first receiving platform 23, the first locking groove 172 is engaged with the first slot 22, the abutting edge portion 171 is adjacent to the second receiving platform 25, the free abutting end 211 is adjacent to the abutting edge portion 171, and the second locking groove 175 is engaged with the third slot 26, thereby completing the position-locking mounting of the main control circuit board 17, and covering the rear cover 3 on the rear side of the main control circuit board 17 and connecting with the front housing 2.

Referring to fig. 7 and 8, and with reference to fig. 4, a hole is formed through the rear cover 3, the panel 15 is installed in the hole, the rear cover 3 is made of plastic, the panel 15 is made of metal material, preferably, the panel 15 is made of aluminum alloy or copper, the inner end surface of the panel 15 is provided with a positioning groove 151, the positioning groove 151 is arranged in a rectangular shape, the inner end surface of the panel 15 is provided with a plurality of avoiding grooves 152 at the edge of the positioning groove 151, the avoiding grooves 152 are arranged in an arc shape, the heat conducting member 16 is located in the positioning groove 151, the middle portion of the rear cover is provided with a threading hole 33 in a penetrating manner, the panel 15 is located above the middle portion of the rear cover 3, that is, the panel 15 is located above the threading hole 33, and the two.

The main control circuit board 17 is provided with a main control chip 176, the main control chip 176 generates a large amount of waste heat during operation, and after the rear cover 3 is covered on the rear side of the main control circuit board 17 and connected with the front case 2, the heat conducting member 16 is connected between the main control chip 176 and the panel 15 in a heat conduction manner. The heat conducting member 16 is a heat conducting agent, a heat conducting silica gel or a heat conducting ceramic, and the waste heat of the main control chip 176 can be conducted to the panel 15 through the heat conducting member 16.

Referring to fig. 3, the hanging plate 4 is used for fixedly connecting a fixed object such as a wall or a door, four hooks 41 are arranged around the hanging plate 4, a mounting hole 42 is formed in the middle of the hanging plate 4 in a penetrating manner, a fixing hole 44 is formed in the mounting hole 42 of the hanging plate 4, the fixing hole 44 is used for being connected with the fixed object, a protrusion 43 is arranged on the periphery of the mounting hole 42 of the hanging plate 4, and the protrusion 43 protrudes towards the rear cover 3. The rear cover 3 is provided with four mounting grooves 32 on the outer periphery of the panel 15. The hanging plate 4 is positioned at the rear side of the rear cover 3 and is detachably connected with the hanging groove 32 through the hook 41, so that the connection between the hanging plate 4 and the rear cover 3 is realized, the bulge 43 is abutted with the panel 15, and the waste heat of the panel 15 can be transmitted to the hanging plate 4 for heat dissipation.

Referring to fig. 7 and 9, the front housing 2 is provided with four L-shaped sound pickup holes 27 at the bottom, the four L-shaped sound pickup holes 27 are distributed along the transverse direction, the four L-shaped sound pickup holes 27 are all located below the horn, a first opening 271 of the L-shaped sound pickup hole 27 is located towards the bottom side, a second opening 273 of the L-shaped sound pickup hole 27 is located towards the rear side, the L-shaped sound pickup hole 27 includes a first duct 272 and a second duct 274 which are communicated with each other, the first duct 272 is perpendicular to the second duct 274, the first opening 271 is located on the first duct 272, the second opening 273 is located on the second duct 274, the cross-sectional area of the first duct 272 is larger than that of the second duct 274, the hole area of the first opening 271 is larger than that of the second opening 273, and the cross-sectional surface of the first duct 272 is arranged in a circular shape, an elliptical shape or a.

The front case 2 is provided with a mounting groove 281 at each second opening 273, a sponge pad 55 is provided in the mounting groove 281, fixing holes 282 are provided at both lateral sides of each second opening 273 of the front case 2, and a positioning post 283 is provided at one side of the fixing holes 282. The door access terminal further comprises a circuit board 51 and four sound pickup modules 52, wherein the circuit board 51 is provided with four through holes 511 in a penetrating manner, the four through holes 511 are distributed along the transverse direction, the four sound pickup modules 52 are welded on the circuit board 51, the sound pickup part 521 of each sound pickup module 52 is located at one through hole 511, and the second opening 273 and the sound pickup module 52 are respectively located at two opposite ends of the through hole 511. The circuit board 51 is provided with positioning holes 53 at both sides of each through hole 511, a positioning hole 54 at one side of the positioning hole 53, the circuit board 51 covers the mounting groove 281 and is connected with the fixing hole 282 through the positioning hole 53 by a screw (not shown), the positioning post 283 is engaged with the positioning hole 54, and the rear cover 3 covers the rear side of the circuit board 51 and is connected with the front case 2.

Then between perforation 511 intercommunication sound picking-up portion 521 and the second opening 273, foam-rubber cushion 55 is located between second opening 273 and the perforation 511, and foam-rubber cushion 55's middle part is run through and is provided with the thru hole, and the thru hole intercommunication is between perforation 511 and second opening 273, realizes then that a sound picking-up module 52 corresponds an L type sound picking-up hole 27 and carries out the pickup processing.

It is from top to bottom, through will going out the sound hole setting and cover after, so go out the area of sound hole, quantity all has great arrangement space, owing to be along the loudspeaker that thickness direction arranged towards the rear side, so loudspeaker can adopt the loudspeaker of great voice coil loudspeaker voice coil, do not influence whole frivolous design, and the sound quality of big voice coil loudspeaker is better, it has sealed glue to fill between edge and the spacing rampart through loudspeaker when connecting to arrange, and close the closing cap lid at loudspeaker's rear side and seal through sealed glue, form comparatively inclosed sound chamber then, it can improve tone quality further.

And, elastic butt piece that sets gradually along the installation direction through preceding shell, first draw-in groove, first accepting platform and second draw-in groove, and the butt edge part that main control circuit board set gradually along the installation direction, first locked groove, bear edge part and locking edge part, along with main control circuit board along the removal and the installation of installation direction, then realize locking edge part and second draw-in groove block, it adjoins with first accepting platform to bear the edge part, first locked groove and first draw-in groove block, free butt end adjoins with the butt edge part, finally realize main control circuit board's installation location, owing to do not adopt conventional screwed connection to arrange, the axial space that the event can be saved screw and arrange, then can further reduce thickness direction's size, be favorable to holistic frivolous design.

Moreover, the rear cover is made of plastic, the panel is made of metal materials, the panel arranged on the rear cover is in heat conduction connection with the main control chip, waste heat of the main control chip is conducted to the panel to dissipate heat, and therefore cost can be effectively controlled and reduced.

In addition, through the arrangement of L type sound picking hole for first opening carries out the radio reception towards the bottom side, and the second opening sets up towards the rear side, carries out the pickup processing through the pickup portion of pickup module then, not only is favorable to the further frivolous change of complete machine, and has avoided setting up in the front of display screen and has picked up the sound hole, improves the screen ratio and the front flatness of occupying of display screen.

Claims (10)

1. The utility model provides an entrance guard terminal of lid installation behind loudspeaker, includes preceding shell, back lid and display screen, the display screen sets up on the preceding shell, back lid is in the rear side of display screen and with preceding shell is connected, its characterized in that:

the rear cover is provided with a sound outlet hole along the thickness direction, the rear cover is provided with a limiting ring wall at the periphery of the sound outlet hole, and the rear cover is provided with an installation outer ring wall at the periphery of the limiting ring wall;

the entrance guard terminal further comprises a loudspeaker and a sealing cover, the loudspeaker is arranged in the limiting ring wall, a sealing glue is filled between the edge of the loudspeaker and the limiting ring wall, the sealing cover covers the rear side of the loudspeaker and is fixedly connected with the rear cover, and a sealing glue is filled between the edge of the sealing cover and the outer mounting ring wall.

2. The access control terminal of claim 1, wherein:

the rear cover is provided with an installation inner ring wall on the inner side of the installation outer ring wall, an installation ring groove is formed between the installation outer ring wall and the installation inner ring wall, the edge of the sealing cover is located in the installation ring groove, and the installation ring groove is filled with sealing glue.

3. The access control terminal of claim 2, wherein:

the limiting ring wall is encircled to form a circular mounting cavity, and the loudspeaker is positioned in the circular mounting cavity;

the mounting ring groove is arranged in a rectangular extending mode, and the sealing cover is arranged in a rectangular mode.

4. The access control terminal of claim 1, wherein:

the rear cover is provided with a bearing step on the inner side of the limiting ring wall, and the horn is adjacent to the bearing step.

5. The access control terminal of claim 1, wherein:

the rear cover is provided with a fixing hole at the outer side of the outer installation ring wall, the sealing cover is provided with a positioning hole, and a connecting screw penetrates through the positioning hole to be connected with the fixing hole.

6. The access control terminal according to any one of claims 1 to 5, characterized in that:

the sealing cover comprises a bottom wall and a peripheral wall arranged on the periphery of the bottom wall, sealing glue is filled between the edge of the peripheral wall and the outer installation ring wall, and the bottom wall is adjacent to the horn.

7. The access control terminal of claim 6, wherein:

the bottom wall is connected with the loudspeaker through a bonding piece.

8. The access control terminal of claim 7, wherein:

the diapire is provided with the constant head tank, the piece that bonds is located in the constant head tank.

9. The access control terminal of claim 6, wherein:

the diapire is provided with the strengthening rib strip.

10. The access control terminal according to any one of claims 1 to 5, characterized in that:

the edge of the sealing cover and the outer installation ring wall are provided with threading holes in a penetrating mode, and the connecting line of the loudspeaker penetrates through the threading holes.

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