CN212012719U - Security and protection equipment - Google Patents

Abstract

The utility model discloses a security protection device, it includes equipment casing, circuit board and acoustics device, acoustics device installs in equipment casing, and acoustics device is connected with the circuit board electricity, equipment casing includes shell body, first spacing portion and second spacing portion, circuit board and shell body relatively fixed, shell body is equipped with the sound receiving hole and goes out the sound hole, shell body includes the panel and connects lateral part and the bottom of the same side of panel, first spacing portion sets up with the bottom of shell body relatively, second spacing portion sets up with the lateral part of shell body relatively; the acoustic device is limited between the bottom and the first limiting part in a first direction, between the side and the second limiting part in a second direction, and between the panel and the circuit board in a third direction, wherein any two of the first direction, the second direction and the third direction are perpendicular to each other. The acoustic device in the security equipment provided by the technical scheme is simple and convenient to install and high in production efficiency.

Description

Security and protection equipment

Technical Field

The utility model relates to a security protection product technology field especially relates to a security protection equipment.

Background

With the gradual improvement of the safety consciousness of people, the security product gradually enters the visual field of people. Security products are usually equipped with acoustic devices such as receivers and speakers to allow a user to communicate with an outdoor visitor by voice while the user is indoors. Among present security protection equipment, acoustic device generally installs to the double-screw bolt of product casing with the help of the screw on, and assembly work is comparatively loaded down with trivial details, and production efficiency is lower.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a security protection equipment to the equipment work of solving present security protection product is loaded down with trivial details, problem that production efficiency is low.

In order to solve the above problem, the utility model adopts the following technical scheme:

a security device, comprising:

the device comprises a device shell, a first limiting part and a second limiting part, wherein the device shell comprises a shell body, the first limiting part and the second limiting part, the shell body is provided with a sound receiving hole and a sound outlet hole, the shell body comprises a panel, and a side part and a bottom part which are connected to the same side of the panel, the first limiting part and the second limiting part are fixed on the panel, the first limiting part is arranged opposite to the bottom part of the shell body, and the second limiting part is arranged opposite to the side part of the shell body;

the circuit board is arranged on one side of the side part, which is far away from the panel, and the circuit board is detachably and fixedly connected with the shell body;

an acoustic device mounted to the equipment enclosure and electrically connected to the circuit board;

the acoustic device is limited between the bottom and the first limiting part in a first direction, between the side and the second limiting part in a second direction, and between the panel and the circuit board in a third direction, wherein any two of the first direction, the second direction, and the third direction are perpendicular to each other.

The utility model discloses a technical scheme can reach following beneficial effect:

the utility model discloses an among the security protection equipment, the equipment casing includes the panel, first spacing portion and the spacing portion of second, the circuit board is fixed in one side that the lateral part deviates from the panel, acoustic device is connected with the circuit board electricity, and at the in-process of installation acoustic device, can restrict the position of acoustic device on the first direction through bottom and first spacing portion, can restrict the position of acoustic device on the second direction through lateral part and the spacing portion of second, can restrict the position of acoustic device on the third direction through panel and circuit board, because first direction, both arbitrary mutually perpendicular in second direction and the third direction, thereby need not to set up screw and double-screw bolt, can be fixed in the equipment casing with acoustic device on, and is easy and simple to handle, and can promote machining efficiency. In addition, the equipment shell is also provided with a sound receiving hole and a sound outlet hole, so that the acoustic device arranged in the equipment shell can transmit sound with the outside through the sound receiving hole and the sound outlet hole.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is an exploded schematic view of a security device disclosed in an embodiment of the present invention;

FIG. 2 is an enlarged view of portion I of FIG. 1;

fig. 3 is an assembly view of an acoustic device and an apparatus housing in the security apparatus disclosed in the embodiment of the present invention;

FIG. 4 is an enlarged view of detail II of FIG. 3;

fig. 5 is the utility model discloses a structural schematic of acoustic device in security protection equipment.

Description of reference numerals:

100-equipment shell, 110-first limit part, 120-second limit part, 130-third limit part, 140-panel, 141-sound-absorbing hole, 150-side enclosing plate, 160-bottom, 170-first positioning column, 180-second positioning column, 190-stud, screw bolt,

200-circuit board, 210-through hole,

300-acoustic device, 310-outer frame, 311-sound opening, 320-metal spring, 330-first positioning part, 340-second positioning part, 350-sealing foam,

400-waterproof breathable film.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in fig. 1-5, an embodiment of the present invention discloses a security device, which includes a device housing 100, a circuit board 200, and an acoustic device 300.

Wherein, equipment casing 100 includes the shell body, the spacing portion of first spacing portion 110 and second 120, preferably, the shell body, the spacing portion of first spacing portion 110 and second 120 can adopt hard materials such as plastics or metal to form through integrated into one piece, can further promote the production efficiency of whole security protection equipment on the one hand, on the other hand, can also promote the reliability of being connected between the spacing portion of first spacing portion 110 and second 120 and the shell body to a certain extent to further promote the stability of relatively fixed relation between acoustic device 300 and equipment casing 100.

As shown in fig. 2, the case body includes a panel 140, and a side portion and a bottom portion 160 connected to the same side of the panel 140, the first limiting portion 110 and the second limiting portion 120 are fixed to the panel 140, the first limiting portion 110 is disposed opposite to the bottom portion 160 of the case body, and the second limiting portion 120 is disposed opposite to the side portion of the case body; as shown in fig. 3, the circuit board 200 is disposed on a side of the side portion facing away from the panel 140, and the circuit board 200 is detachably and fixedly connected to the housing body, optionally, the circuit board 200 is fixed to the housing body by means of plugging or clamping, or the circuit board 200 may be fixed to the housing body by a threaded connector. Of course, the circuit board 200 may be fixed to the device housing 100 in other ways, for example, the security device may further include a rear casing (not shown in the figure), the rear casing may be disposed on a side of the side portion away from the panel 140, and the rear casing and the device housing 100 may be connected by a connector such as a screw, so as to fix the circuit board 200 to the device housing 100, in this case, the circuit board 200 may also be located in a space surrounded by the side portion, the bottom portion 160 and the panel 140.

The case body and the circuit board 200 enclose a mounting space in which the acoustic device 300 can be mounted to provide a protective function for the acoustic device 300 and the like by means of the case body and the circuit board 200. It should be noted that the side and bottom portions 160 of the case body are portions connected to different positions on the panel 140. Generally, the housing body has a cover-shaped structure, in the case that the housing body has a square structure, the number of the side portions and the bottom portions 160 may be two, the two bottom portions 160 are oppositely disposed, the two side portions are oppositely disposed, the side portions and the bottom portions 160 may be respectively two adjacent side edges of the housing body, and in the housing body, the side portions and the bottom portions 160 are alternately disposed. Alternatively, the housing body may also have a circular or polygonal configuration, in which case the sides and the bottom 160 may be different portions of the housing body, wherein the portion opposite the first limiting portion 110 may be considered as a side and the portion opposite the second limiting portion 120 may be considered as a bottom 160. In addition, the first direction may be a height direction of the security device, the second direction may be a width direction of the security device, and the third direction may be a thickness direction of the security device, which are perpendicular to each other, more specifically, the first direction and the second direction may be a direction Y and a direction X in fig. 3, respectively, and the third direction may be a direction perpendicular to the paper surface in fig. 3.

Also, the acoustic device 300 is electrically connected to the circuit board 200, so that the acoustic device 300 can convert a sound signal and an electric signal into each other, so that a user can make a voice call with an outdoor visitor by means of the security device. Alternatively, the acoustic device 300 can be electrically connected to the circuit board 200 by a cable or other conductive structure for the purpose of electrical connection. The acoustic device 300 may include a plurality of single-function acoustic devices, such as a microphone and a speaker, which are independently disposed, or the acoustic device 300 may be a multifunctional combined device having both functions of sound production and sound reception.

In the process of mounting the acoustic device 300, by limiting the acoustic device 300 between the bottom 160 and the first limiting portion 110 in the first direction, limiting the acoustic device 300 between the side portion and the second limiting portion 120 in the second direction, and limiting the acoustic device 300 between the panel 140 and the circuit board 200 in the third direction, since the circuit board 200 and the device case 100 can be relatively fixed, and any two of the first direction, the second direction, and the third direction are perpendicular to each other, a reliable relative fixing relationship among the acoustic device 300, the device case 100, and the circuit board 200 can be ensured. Obviously, in the assembling process of the security equipment, the acoustic device 300 is installed without screws or studs, the acoustic device 300 is clamped between the first limiting part 110, the second limiting part 120, the side part and the bottom part 160, and then the circuit board 200 is installed between the equipment shells 100, so that the operation is simple and convenient, and the processing efficiency of the security equipment can be improved.

In addition, in order to ensure that the sound signal can be transmitted between the inside of the mounting device and the outside of the security device, the shell body is provided with a sound receiving hole 141 and a sound outlet hole, so that the sound signal can be transmitted into the mounting device through the sound receiving hole 141 and collected by the acoustic device 300; correspondingly, the sound signal emitted by the acoustic device 300 is transmitted out of the security device through the sound outlet hole, so that the user can obtain the sound signal with high loudness. The size and the coverage area of the sound outlet hole and the sound receiving hole 141 may be determined according to actual conditions, and the sound outlet hole may be directed to a region of the acoustic device 300 where the sound signal is generated, and the sound receiving hole 141 may be directed to a region of the acoustic device 300 where the sound signal is received, so as to further optimize the transmission process of the sound signal between the user and the acoustic device 300.

As described above, the acoustic device 300 is electrically connected to the circuit board 200, and optionally, as shown in fig. 5, the acoustic device 300 is provided with the metal dome 320, an electrical connection portion is provided on the circuit board 200 in a region facing the metal dome 320, and the metal dome 320 is press-fitted against the electrical connection portion. Alternatively, the area of the circuit board 200 facing the metal dome 320 may be exposed or an electrical connection portion formed by separately adding a conductive material such as metal may ensure that the electrical connection portion abutting against the metal dome 320 can distribute power to the acoustic device 300. Accordingly, the arrangement positions of the electrical connection portions may be determined according to the positions of the metal elastic pieces 320, the number of the metal elastic pieces 320 may be two, the two metal elastic pieces 320 are respectively used as the positive electrode and the negative electrode of the acoustic device 300, and the two metal elastic pieces 320 are respectively connected with the two electrical connection portions at corresponding positions on the circuit board 200 in a one-to-one correspondence manner.

Under the condition of adopting above-mentioned technical scheme, need not the welding cable, but after acoustic device 300 was installed to equipment casing 100, along with the going on of the equipment of circuit board 200 and equipment casing 100 work of assembling, accomplish the electric connection work between acoustic device 300 and the circuit board 200 together, this can further reduce the installation process of acoustic device 300, promote the production efficiency of security protection equipment. Moreover, after the circuit board 200 is fixedly connected with the device housing 100, the metal elastic sheet 320 is abutted to the electrical connection portion of the circuit board 200, so that poor contact and even disconnection between the acoustic device 300 and the circuit board 200 caused by cable breakage and the like can be basically prevented, and the security device is ensured to have higher reliability.

Optionally, the distance between the first position-limiting portion 110 and the bottom portion 160 gradually increases along the direction in which the panel 140 points to the circuit board 200. In the case that the apparatus casing 100 adopts the above structure, when it is necessary to mount the acoustic device 300 to the apparatus casing 100, the acoustic device 300 may be extended between the first position-limiting portion 110, the second position-limiting portion 120, and the side portion and the bottom portion 160 from the side portion and the bottom portion 160 away from the panel 140, that is, the direction in which the circuit board 200 is directed toward the panel 140. Since the distance between the first position-limiting portion 110 and the bottom portion 160 gradually increases in the direction in which the panel 140 points to the circuit board 200, the distance between the position farthest from the panel 140 on the first position-limiting portion 110 and the bottom portion 160 is maximized. The position of the first limiting portion 110 farthest from the panel 140 is an entrance when the acoustic device 300 and the equipment enclosure 100 are assembled with each other, and the distance between the position of the first limiting portion 110 farthest from the panel 140 and the bottom portion 160 is large, so that the difficulty in the mutual matching between the acoustic device 300 and the equipment enclosure 100 can be reduced, and the acoustic device 300 can be easily installed between the first limiting portion 110 and the bottom portion 160. Furthermore, as the acoustic device 300 gradually penetrates, the distance between the first limiting portion 110 and the bottom portion 160 is gradually smaller, and finally, it can still be ensured that the acoustic device 300 is limited and disposed between the first limiting portion 110 and the bottom portion 160 in the first direction.

Specifically, the side of the first position-limiting part 110 facing the bottom part 160 may be an inclined plane or an arc plane. Moreover, the distance between the position where the first limiting part 110 is connected with the panel 140 and the bottom 160 may be smaller than the size of the acoustic device 300 in the first direction, which enables the first limiting part 110 and the bottom 160 to form a mutual pressing fit relation with the acoustic device 300, and further improves the limiting fit relation between the acoustic device 300 and the equipment casing 100 in the first direction.

Optionally, the distance between the second position-limiting portion 120 and the side portion gradually increases along the direction in which the panel 140 points to the circuit board 200. Similarly, in the case of adopting the above technical solution, by further increasing the size of the entrance of the acoustic device 300 in the apparatus casing 100, the difficulty of fitting between the acoustic device 300 and the apparatus casing 100 can be further reduced. Specifically, the side surface of the second limiting portion 120 facing the side portion may be an inclined plane or an arc surface, and the distance between the position of the second limiting portion 120 connected to the panel 140 and the side portion may also be smaller than the distance between the acoustic device 300 in the second direction, so that the apparatus casing 100 and the acoustic device 300 also form a press fit relationship in the second direction, and the limit fit relationship between the acoustic device 300 and the apparatus casing 100 in the second direction is further improved.

The side portion may be a plate-like structure, in which case the acoustic device 300 is arranged to conform to the side portion. Optionally, the side portion includes a side enclosing plate 150 and a third position-limiting portion 130, the third position-limiting portion 130 is fixed to the panel 140 and is spaced apart from the side enclosing plate 150, and in the second direction, the acoustic device 300 is limited between the third position-limiting portion 130 and the second position-limiting portion 120, which may also ensure that the acoustic device 300 and the equipment enclosure 100 can form a limit-matching relationship in the second direction. And, the stud 190 is arranged between the third limiting portion 130 and the side wall plate 150, and the circuit board 200 can be detachably fixed to the case body by a screw connected to the stud 190, so that the circuit board 200 is fixedly connected to the edge of the case body, thereby further improving the connection reliability between the circuit board 200 and the device case 100, and preventing the edge of the circuit board 200 from tilting, so that the sealing performance between the circuit board 200 and the device case 100 is relatively high. Alternatively, in the case where the security device is provided with a rear case, the stud 190 serves as a component for fixing the device case 100 and the rear case to each other, and the rear case and the device case 100 may also limit the position of the circuit board 200.

Optionally, the side wall plate 150, the third limiting portion 130 and the stud 190 are formed in an integrated manner, so as to improve the production efficiency and the connection reliability between the three. By positioning the stud 190 between the side wall 150 and the third position-limiting portion 130, the space between the side wall 150 and the third position-limiting portion 130 can be effectively utilized, and the connection reliability between the circuit board 200 and the device case 100 can be improved. Of course, the circuit board 200 and the device housing 100 may be fixed to each other by a plurality of screws, and correspondingly, the device housing 100 may also be provided with a plurality of studs 190, the edge of the inner side of the device housing 100 may be provided with a plurality of studs 190, and the center area of the device housing 100 may also be provided with a plurality of studs 190, and the circuit board 200 is provided with through holes 210 at positions corresponding to the studs 190, so that threaded connectors such as screws can pass through the through holes 210 on the circuit board 200 to connect with the studs 190, thereby achieving the purpose of fixing the circuit board 200 and the device housing 100.

Further, the dimension of the third limiting portion 130 in the first direction is smaller than the dimension of the acoustic device 300 in the first direction, and compared with the cooperation of the third limiting portion 130 through the side portion of the plate-shaped structure, the contact area between the third limiting portion 130 and the acoustic device 300 is relatively smaller, which may make the pressure between the third limiting portion 130 and the acoustic device 300 larger, and may further improve the stability of the limiting cooperation relationship between the acoustic device 300 and the apparatus casing 100 in the second direction. Alternatively, the number of the third position-limiting portions 130 may be one, and in the first direction, the distance between the third position-limiting portion 130 and the first position-limiting portion 110 may be equal to the distance between the third position-limiting portion 130 and the bottom portion 160, so that the matching stability between the acoustic device 300 and the equipment enclosure 100 is further improved by matching the third position-limiting portion 130 and the middle portion of the acoustic device 300.

In other embodiments of the present invention, the number of the third limiting portions 130 may be two, and in the first direction, the second limiting portion 120 is located between the two third limiting portions 130, after the acoustic device 300 is installed on the device casing 100, along the second direction, the acoustic device 300 can be limited between the second limiting portion 120 and the two third limiting portions 130, and in the case that the second limiting portion 120 and the two third limiting portions 130 form a "triangle" vertex distribution, the acoustic device 300 can be further prevented from rotating along the direction around the third direction, and the stability of the relative fixing relationship between the acoustic device 300 and the device casing 100 is further improved.

Alternatively, as shown in fig. 2 and 4, the housing body is provided with a first positioning column 170 and a second positioning column 180, the acoustic device 300 is provided with a first positioning portion 330 and a second positioning portion 340, the first positioning portion 330 is sleeved on the first positioning column 170, the second positioning portion 340 is sleeved on the second positioning column 180, under the action of the first positioning column 170 and the second positioning column 180, the acoustic device 300 and the equipment enclosure 100 can form a stable limit fit relation in the direction around the third direction, on one hand, a pre-positioning effect can be provided for the acoustic device 300 by means of the first positioning column 170 and the second positioning column 180, on the other hand, after the acoustic device 300 is mounted to the apparatus housing 100, the first positioning post 170 and the first positioning portion 330, and the fitting relationship between the second positioning column 180 and the second positioning portion 340 can further improve the stability of the relative fixing relationship between the acoustic device 300 and the apparatus casing 100.

In addition, the first positioning column 170 may be disposed between the side wall plate 150 and the third limiting portion 130, so that the first positioning column 170 may occupy the installation space in the equipment housing 100 as little as possible, and the utilization rate of the space sandwiched between the side wall plate 150 and the third limiting portion 130 is increased, and by disposing the second positioning column 180 on the side where the second limiting portion 120 is located, the positioning effect provided by the first positioning column 170 and the second positioning column 180 for the acoustic device 300 may be further improved.

Alternatively, the sound receiving hole 141 and the sound emitting hole may be disposed on different surfaces of the device case 100 to prevent the sound signal emitted from the sound emitting hole from adversely affecting the sound receiving process of the acoustic device 300.

Optionally, the sound receiving hole 141 is disposed on the panel 140 to improve the quality of the sound obtained by the acoustic device 300 through the sound receiving hole 141, and accordingly, the sound emitting hole can be disposed at the bottom 160 of the housing body, so that on one hand, the sound signal emitted from the sound emitting hole is prevented from generating adverse effect on the sound receiving process, on the other hand, the external moisture and dust can be reduced to enter the security device from the sound receiving hole 141, and the service life of the security device is prolonged.

Specifically, the shapes and sizes of the sound receiving hole 141 and the sound emitting hole, and the area of the region covered by each of the sound receiving hole and the sound emitting hole can be determined according to actual requirements. The number of the sound absorbing hole 141 and the sound emitting hole may be only one, and the cross-sectional shapes of the sound absorbing hole and the sound emitting hole may be square, circular or other shapes, which is not limited herein. Optionally, the number of the sound receiving holes 141 and the number of the sound outlet holes are multiple, the sound receiving holes 141 are spaced from each other and cover the region for receiving the sound signal in the acoustic device 300, and the region for receiving the sound signal in the acoustic device 300 is provided with the multiple sound receiving holes 141, so that the total area of the region for communicating the security device with the outside can be further reduced under the condition of meeting the sound receiving requirement, and the dustproof and waterproof performance of the security device can be greatly improved by reducing the sectional area of the single sound receiving hole 141. Similarly, the same is true of the sound holes.

In order to further improve the sealing performance between the acoustic device 300 and the housing body, a sealing foam 350 may be disposed on one side of the acoustic device 300 facing the panel 140, and the sound receiving hole 141 is only communicated with the region of the acoustic device 300 for receiving the sound signal, and the sound receiving hole 141 is isolated from other regions inside the security device, so that the sealing performance of the security device may be further improved. In addition, under the condition that the acoustic device 300 is hermetically connected with the device shell 100 through the sealing foam 350, the problem that sound signals received by the acoustic device 300 are reduced due to the fact that sound entering the security device from the sound receiving hole 141 is diffused can be prevented, and the sound receiving performance of the acoustic device 300 is high.

Under the condition that the sealing foam 350 is arranged on the side, facing the panel 140, of the acoustic device 300, the circuit board 200 and the panel 140 of the equipment enclosure 100 can further improve the sealing performance between the acoustic device 300 and the equipment enclosure 100 in a mode of pressing the sealing foam 350, on the one hand, in the third direction, the limit relation between the acoustic device 300 and the equipment enclosure 100 is more stable, and the situation that the acoustic device 300 and the equipment enclosure 100 are damaged due to mutual pressing can be basically prevented.

More specifically, the sealing foam 350 disposed on the side of the acoustic device 300 facing the panel 140 may be a ring-shaped structure, and the sealing foam 350 is disposed around the area of the acoustic device 300 for receiving the sound signal and is in mutual press fit with the outer frame 310 of the acoustic device 300, so as to prevent the arrangement of the sealing foam 350 from adversely affecting the receiving operation of the sound signal, and further improve the sealing effect provided by the sealing foam 350.

Optionally, a side of the acoustic device 300 facing the bottom 160 is provided with a sealing foam and a waterproof breathable film 400, so as to improve the sealing performance between the acoustic device 300 and the sound outlet hole, and to some extent, improve the sound outlet effect of the acoustic device 300. Similarly, the sealing foam may have a ring structure, and the sealing foam is disposed around the region of the acoustic device 300 where the sound signal is emitted, that is, the sealing foam is disposed around the sound emitting opening 311. The setting of waterproof ventilated membrane 400 can further promote the sealing performance of security protection equipment, and waterproof ventilated membrane 400 can paste the inboard in the regional place of sound hole in the bottom 160 of shell body. Similarly, the inside of the region of the sound emission hole 141 in the side portion of the case body may also be provided with the waterproof breathable film 400.

The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A security device, comprising:

the device comprises a device shell (100), wherein the device shell (100) comprises a shell body, a first limiting part (110) and a second limiting part (120), the shell body is provided with a sound receiving hole (141) and a sound outlet hole, the shell body comprises a panel (140) and a side part and a bottom part (160) which are connected to the same side of the panel (140), the first limiting part (110) and the second limiting part (120) are fixed on the panel (140), the first limiting part (110) and the bottom part (160) of the shell body are arranged oppositely, and the second limiting part (120) and the side part of the shell body are arranged oppositely;

the circuit board (200) is arranged on one side of the side part, which is far away from the panel (140), and the circuit board (200) is detachably and fixedly connected with the shell body;

an acoustic device (300), the acoustic device (300) being mounted to the apparatus casing (100), and the acoustic device (300) being electrically connected to the circuit board (200);

the acoustic device (300) is confined between the bottom portion (160) and the first confinement portion (110) in a first direction, the acoustic device (300) is confined between the side portion and the second confinement portion (120) in a second direction, and the acoustic device (300) is confined between the panel (140) and the circuit board (200) in a third direction, wherein any two of the first direction, the second direction, and the third direction are perpendicular to each other.

2. The security device according to claim 1, wherein the acoustic device (300) is provided with a metal dome (320), an electrical connection portion is provided on the circuit board (200) in a region facing the metal dome (320), and the metal dome (320) is in abutting fit with the electrical connection portion.

3. The security device according to claim 1, wherein a distance between the first position-limiting portion (110) and the bottom portion (160) is gradually increased in a direction in which the panel (140) points to the circuit board (200).

4. The security device according to claim 1, wherein a distance between the second limiting portion (120) and the side portion is gradually increased in a direction in which the panel (140) points to the circuit board (200).

5. The security device according to claim 1, wherein the side portion comprises a side enclosing plate (150) and a third limiting portion (130), the third limiting portion (130) is fixed on the panel (140) and is spaced from the side enclosing plate (150), and the acoustic device (300) is limited between the third limiting portion (130) and the second limiting portion (120) in the second direction; a stud (190) is arranged between the third limiting part (130) and the side enclosing plate (150), and the circuit board (200) is detachably fixed on the shell body through a screw connected with the stud (190).

6. The security device according to claim 5, wherein the number of the third limiting portions (130) is two, the second limiting portion (120) is located between the two third limiting portions (130) in the first direction, and the acoustic device (300) is limited between the second limiting portion (120) and the two third limiting portions (130) in the second direction.

7. The security device according to claim 5, wherein the housing body is provided with a first positioning column (170) and a second positioning column (180), the first positioning column (170) is disposed between the side wall (150) and the third limiting portion (130), the second positioning column (180) is disposed on one side of the second limiting portion (120), the acoustic device (300) is provided with a first positioning portion (330) and a second positioning portion (340), the first positioning portion (330) is sleeved on the first positioning column (170), and the second positioning portion (340) is sleeved on the second positioning column (180).

8. The security device according to claim 1, wherein the sound receiving hole (141) is disposed on the panel (140), and the sound emitting hole is disposed on the bottom (160).

9. The security device according to claim 8, characterized in that the side of the acoustic device (300) facing the panel (140) is provided with a sealing foam (350).

10. The security device according to claim 8, characterized in that the side of the acoustic device (300) facing the bottom (160) is provided with a sealing foam and a waterproof and breathable membrane (400).

Images