Doorbell with display function

Abstract

This application relates to the technical field of doorbells and discloses a doorbell with a display function. It includes a housing, a speaker mounted on the housing, and a trigger button. The housing houses a storage battery for powering the doorbell. The housing also contains LED beads, a display frame, a PCB board, and a temperature and humidity sensor. The display frame has a light-transmitting hole for light to pass through. The LED beads are mounted on the PCB board, and the display frame is located on one side of the PCB board. A controller is electrically connected to the temperature and humidity sensor, and the controller is electrically connected to the LED beads. The temperature and humidity sensor can detect ambient temperature and humidity and display them on the display frame via the controller to provide real-time information. This enriches the human-computer interaction of the doorbell, facilitates its integration with smart home systems, improves its practicality and user engagement, and enhances its overall intelligence.

Description

Technical Field

[0001] This application relates to the technical field of doorbells, and in particular to a doorbell with a display function. Background Technology

[0002] With the continuous deepening of IoT technology and the smart home ecosystem, doorbells have evolved from basic electroacoustic alert devices into core entry points for smart security systems in modern homes and offices. Their role is no longer limited to simple visitor alerts, but has been given multiple missions including remote interaction, security monitoring, and even smart home integration. Under this trend, users' expectations for doorbells have long surpassed their traditional functional scope, seeking instead the comprehensiveness, interactivity, and reliability expected of a smart terminal. Market evolution clearly demonstrates that an isolated, single-function doorbell product can no longer integrate into and meet the increasingly systematic and scenario-based needs of modern smart living. Therefore, the upgrading of doorbells is not only an iteration of the product itself, but also a process of reshaping its value as an interface to the smart ecosystem. This provides a clear market direction and broad application prospects for the design and development of a new generation of multifunctional, highly integrated doorbell products.

[0003] The doorbell products currently on the market and those with related patents still have relatively basic technical architectures and functional implementations. In terms of hardware, a typical design usually includes a signal trigger unit for outdoor installation, such as the housing and button, and an indoor sound alert unit, such as a speaker. The two communicate unidirectionally via wired or wireless radio frequency signals. Internal core components generally include a microprocessor, simple audio codec circuitry, a storage battery, and a basic communication module. The entire system operates as a simple open-loop control: a visitor presses the button to trigger a signal, which the indoor unit receives and drives the speaker to emit a preset alert tone. Although some improved products attempt to integrate simple LED indicators or change sound effects, their fundamental technical paradigm remains unchanged. This design philosophy, with "alerts" as the ultimate goal, leads to inherent functional limitations in the product's system architecture. It lacks the ability to perceive the external environment and cannot effectively exchange and collaborate with other smart devices within the home, resulting in a relatively rigid overall technical form.

[0004] Based on the aforementioned technological status quo, existing doorbell products exhibit significant functional deficiencies and technological bottlenecks when addressing diverse user needs. The primary issue lies in their limited interaction dimension, offering only audio prompts, which are easily overlooked in noisy environments or situations requiring silence, lacking multimodal feedback mechanisms such as visual and tactile feedback. Secondly, their system isolation is prominent. Lacking environmental sensors like cameras and motion detectors, and with a simple communication protocol, they are difficult to use as trigger nodes to activate smart home scenarios, such as indoor humidifiers and air conditioners. This severely limits the product's practicality and user engagement, ultimately preventing it from meeting users' comprehensive needs for security, convenience, and intelligence, thus requiring improvement. Summary of the Invention

[0005] To enhance the user experience of the doorbell and improve its intelligence, this application provides a doorbell with a display function.

[0006] The doorbell with display function provided in this application adopts the following technical solution: A doorbell with a display function includes a housing, a speaker mounted on the housing, and a trigger button. The housing contains a storage battery for powering the doorbell. The housing also contains LED beads, a display frame, a PCB board, and a temperature and humidity sensor. The display frame has a light-transmitting hole for light to pass through. The LED beads are mounted on the PCB board. The display frame is located on one side of the PCB board. The temperature and humidity sensor is electrically connected to a controller, and the controller is electrically connected to the LED beads.

[0007] By adopting the above technical solution, the temperature and humidity sensor can detect the ambient temperature and humidity, and then transmit the temperature and humidity data to the controller. The controller controls different LED beads to light up, thereby displaying different numbers on the display frame to show the ambient temperature and humidity in real time. This enriches the human-computer interaction dimension of the doorbell, facilitates its integration with smart home devices, and serves as a trigger node for smart home devices such as indoor humidifiers and air conditioners, providing a comfortable indoor environment. This meets the needs of increasingly automated and intelligent home products, facilitates integration with other smart home products, improves the doorbell's practicality and user stickiness, enhances the user experience, and makes the doorbell more intelligent.

[0008] Optionally, a transparent plate is provided on the side of the display frame away from the PCB board, the transparent plate is connected to the outer casing, and the diameter of the light-transmitting hole gradually increases from the PCB board to the transparent plate.

[0009] By adopting the above technical solution, the transparent plate can prevent moisture from entering the housing through the light-transmitting holes of the display frame, without obstructing the light from the LEDs through the display frame. This enhances the doorbell's waterproof effect while making the display frame easier for the human eye to observe. Simultaneously, the gradually increasing aperture design effectively widens the light emission angle, allowing the light emitted from the LEDs to diffuse more evenly, reducing bright spots and dark areas. This makes the digital display on the display frame clearer and more consistent, improving the visibility of the display frame from different viewing angles. It ensures that users can clearly read temperature and humidity information from various installation heights and viewing positions, further optimizing the human-computer interaction experience and saving on LED material costs.

[0010] Optionally, the housing is provided with a power supply port, and the power supply port is provided with a wire that is electrically connected to the energy storage battery.

[0011] By adopting the above technical solution, the power supply port and wires allow the doorbell to be connected to an external power source for charging or direct power supply, ensuring that the energy storage battery can be continuously replenished with power, reducing the doorbell's inability to work due to battery depletion, improving the doorbell's reliability and continuous operation capability, and providing users with flexible power supply options.

[0012] Optionally, the housing includes a first housing and a second housing, the display frame is disposed in the first housing, the second housing is provided with an adjustment button for adjusting the display mode, the adjustment button is electrically connected to the controller, and the second housing is provided with a cover plate, the cover plate including a connecting rod hinged to the second housing and a fixing plate disposed on the connecting rod.

[0013] By adopting the above technical solution, the separate design of the first and second housings facilitates manufacturing, assembly, and maintenance. The adjustment buttons allow users to switch display modes as needed, such as between temperature, humidity, or other information, enhancing the flexibility and interactivity of user control. The cover plate, with its hinged design, can be easily opened or closed, protecting the adjustment buttons from accidental touches or environmental factors such as dust and moisture, extending the buttons' lifespan.

[0014] Optionally, a fixed suction cup is slidably disposed on the side of the fixed plate near the second housing. The fixed suction cup includes an adsorption part and a sliding part disposed on the adsorption part. A sliding hole is provided on the fixed plate for the sliding part to slide. A fixed spring is disposed in the sliding hole. One end of the fixed spring is connected to the sliding part and the other end is connected to the wall of the sliding hole. The fixed spring has a tendency to drive the sliding part into the sliding hole. A locking rod is slidably disposed in the sliding hole. The locking rod extends out of the fixed plate along the sliding hole. The minimum distance between the adsorption part and the fixed plate is greater than the maximum distance between the adjustment button and the second housing.

[0015] By adopting the above technical solution, when the cover is closed, pressing the locking lever pushes the sliding part closer to the suction part, thereby pushing the fixed suction cup closer to the second housing. This causes the suction part to adhere to the second housing, placing it between the fixed plate and the second housing. A gap exists between the fixed plate and the adjustment button, preventing accidental activation of the adjustment button due to accidental contact with the fixed plate when the cover is closed, further enhancing the doorbell's anti-accidental activation effect. The suction part adheres to the second housing, fixing the fixed plate in the position of the adjustment button, thus locking the fixed plate. To adjust the doorbell's display mode, simply rotate the fixed plate away from the second housing, separating the suction part from the second housing. The sliding part will then slide into the sliding hole under the action of the fixed spring, exposing the adjustment button for easy adjustment of the doorbell's display mode.

[0016] Optionally, the fixing plate has a fastening screw hole, in which a fastening bolt is threadedly connected. The fixing plate also has a connecting hole communicating with the fastening screw hole. The connecting hole communicates with the sliding hole, and an abutment block is slidably disposed in the connecting hole. The abutment block has a guide slope, which guides the abutment block into the sliding hole. The sliding part has a pushing groove for the abutment block to extend into. The groove wall of the pushing groove has a guide slope, which guides the sliding part to move towards the side closer to the adsorption part when the abutment block approaches the sliding part.

[0017] By adopting the above technical solution, when the doorbell needs to be installed on the wall, the fixing plate can be rotated to a vertical position away from the second housing, separating the suction part from the second housing. Then, the fastening bolts can be screwed into the fastening screw holes and the wall. When the fastening bolts are screwed into the fastening screw holes, they will push the abutment block into the sliding hole along the guide slope, causing the abutment block to move along the guide slope, thereby pushing the sliding part towards the suction part, so that the suction part is attached to the wall, further fixing the fixing plate to the wall and improving the stability of the doorbell when installed on the wall. When the doorbell is installed on the wall, the fixing suction cup abuts against the fixing plate and the wall, increasing the distance between the adjustment button and the wall, thus making the adjustment button less likely to be accidentally activated due to contact with the wall.

[0018] Optionally, the second housing is provided with a mounting base for hinged connection of the connecting rod. The mounting base has a locking groove, a locking block is provided in the locking groove, and a locking spring is provided on the locking block. The locking spring has a tendency to drive the locking block out of the locking groove. The locking block has a first inclined surface, which is used to guide the locking block into the locking groove when the fixing plate abuts against the locking block. When the fixing plate rotates to its maximum angle towards the first housing, the locking block abuts against the side of the fixing plate away from the second housing.

[0019] By adopting the above technical solution, when the fixing plate is opened, after the fixing plate rotates to the vertical position, the locking block extends out of the locking groove under the action of the locking spring, and the side wall of the locking block abuts against the side wall of the fixing plate. The locking block can prevent the fixing plate from rotating towards the second housing, thereby locking the fixing plate in a vertical state, making the fixing plate less prone to rotation, facilitating the subsequent fixing of the fixing plate to the wall, and improving the convenience of doorbell installation. During the rotation and opening process of the fixing plate, the first inclined surface on the locking block abuts against the side wall of the fixing plate, thereby pushing the locking block into the locking groove during the rotation of the fixing plate. Only when the fixing plate rotates to the vertical position will the locking block extend out of the locking groove under the action of the locking spring. This makes the locking block less likely to obstruct the rotation of the fixing plate to the vertical position, facilitating the rotation of the fixing plate, and thus facilitating the installation of the doorbell on the wall.

[0020] Optionally, the first housing and the second housing are detachably connected.

[0021] By adopting the above technical solution, the first housing and the second housing are detachably connected, making the doorbell easy to disassemble for internal maintenance, battery replacement or component cleaning, reducing maintenance difficulty and cost, and improving product serviceability and service life.

[0022] Optionally, the first housing has a connecting screw hole, and the second housing has a clearance hole, through which a connecting bolt passes, and the connecting bolt is threaded into the connecting screw hole.

[0023] By adopting the above technical solution, the connecting bolts firmly connect the first and second housings through the clearance holes and connecting screw holes, ensuring the stability and integrity of the outer shell structure; at the same time, the bolt connection method allows for easy disassembly and reassembly, facilitating users to maintain or replace parts, thus improving the maintainability and user-friendliness of the product.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. By adding a display screen to the doorbell, the doorbell can display ambient temperature and humidity, enriching the user experience and enhancing its intelligence. 2. When the doorbell needs to be placed on a table, rotate the cover towards the second housing and press the locking lever to allow the suction cup to adhere to the second housing. The cover prevents accidental touches on the adjustment buttons when the display mode does not need to be adjusted. When the doorbell needs to be installed on the wall, simply rotate the cover away from the second housing and then fix the mounting plate to the wall with the fastening bolts. The suction cup will automatically extend and adhere to the wall, enhancing the stability of the doorbell. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0026] Figure 2 This is an exploded structural diagram of Embodiment 1 of this application.

[0027] Figure 3 This is an exploded structural diagram of the connecting screw hole used in Embodiment 1 of this application.

[0028] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0029] Figure 5 This is a partial structural diagram of the fixed suction cup used in Embodiment 2 of this application.

[0030] Figure 6 This is a partial structural schematic diagram of the fixed spring in Embodiment 2 of this application.

[0031] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0032] Figure 8 This is a partial structural diagram of the locking block used to illustrate Embodiment 2 of this application.

[0033] Explanation of reference numerals in the attached figures: 1. Outer shell; 11. Speaker; 12. LED bead; 13. Display frame; 131. Light-transmitting hole; 14. PCB board; 15. Temperature and humidity sensor; 16. First housing; 161. Connecting screw hole; 17. Second housing; 171. Clearing hole; 172. Connecting bolt; 173. Power supply port; 174. Adjustment button; 18. Energy storage battery; 19. Transparent plate; 2. Cover plate; 21. Connecting rod; 22. Fixing plate; 221. Sliding hole; 222. Fixing spring; 223. Locking rod; 224. Fastening screw hole; 225. Fastening bolt; 226. Connecting hole; 227. Abutting block; 228. Guide slope; 23. Fixing suction cup; 231. Adsorption part; 232. Sliding part; 233. Pushing groove; 234. Guide slope; 3. Mounting base; 31. Locking groove; 311. Locking block; 312. First slope. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0035] This application discloses a doorbell with a display function.

[0036] Example 1 Reference Figure 1 and Figure 2 A doorbell with display function includes a housing 1, a speaker 11, a trigger button (not shown), LED beads 12, a display frame 13, a PCB board 14, a temperature and humidity sensor 15, and a controller (not shown). The housing 1 protects the internal components, the speaker 11 provides an audible alert, the trigger button allows visitors to activate the doorbell signal, the LED beads 12 and the display frame 13 work together to provide a visual display, the temperature and humidity sensor 15 senses the ambient temperature and humidity, and the controller controls the LED beads 12 based on the data from the temperature and humidity sensor 15. This achieves the effect of enabling the doorbell to have environmental perception and visual display functions, thus improving the user experience.

[0037] Reference Figure 1 and Figure 2 The outer casing 1 includes a first casing 16 and a second casing 17. The display frame 13 is disposed in the first casing 16, which serves to protect the display frame 13 and internal components. The outer casing 1 is provided with an energy storage battery 18 for powering the doorbell. The energy storage battery 18 can be a lithium battery or a lead-acid battery. The energy storage battery 18 is connected to the various electrical components of the doorbell through wires to provide them with power.

[0038] Reference Figure 2 and Figure 3 The first housing 16 and the second housing 17 are detachably connected. The first housing 16 has a connecting screw hole 161 and the second housing 17 has a clearance hole 171. A connecting bolt 172 passes through the clearance hole 171 and is threaded into the connecting screw hole 161, which facilitates the maintenance and replacement of the internal components of the doorbell.

[0039] Reference Figure 2 The display frame 13 has a light-transmitting hole 131 for light to pass through, which allows the light emitted by the LED 12 to pass through the display frame 13 more effectively. The LED 12 is mounted on the PCB board 14, which serves to support and connect electronic components. The display frame 13 is located on one side of the PCB board 14 and can be made of plastic.

[0040] Reference Figure 2The controller is electrically connected to the temperature and humidity sensor 15. The controller can be a microcontroller or a PLC. Microcontrollers are small and low-cost, making them suitable for small devices, while PLCs offer high stability and strong anti-interference capabilities, making them suitable for complex environments. The controller is also electrically connected to the LED beads 12. The temperature and humidity sensor 15 transmits the detected temperature and humidity data to the controller. The controller then controls the number, position, and color of the LED beads 12 according to a preset program to visually display the ambient temperature and humidity information.

[0041] Reference Figure 1 A transparent plate 19 is provided on the side of the display frame 13 away from the PCB board 14, and the transparent plate 19 is connected to the housing 1. The diameter of the light-transmitting hole 131 gradually increases from the PCB board 14 to the transparent plate 19. This design allows the light to diffuse better and improves the display effect.

[0042] Reference Figure 2 and Figure 3 The second housing 17 is provided with a power supply port 173, which is equipped with a wire (not shown in the figure) that is electrically connected to the energy storage battery 18. The power supply port 173 can be a Type-C interface or a DC interface. The Type-C interface has strong universality, while the DC interface has better power supply stability. When the energy storage battery 18 is low on power, it can be charged by connecting an external power source through the power supply port 173.

[0043] The implementation principle of a doorbell with display function according to this application embodiment is as follows: by adding components such as a temperature and humidity sensor 15, LED beads 12, and a display frame 13, the doorbell acquires environmental perception and visual display functions, providing users with richer information. Simultaneously, the power supply port 173 facilitates the charging of the energy storage battery 18, improving the convenience of doorbell use and solving the problems of traditional doorbells having limited functionality, lacking environmental perception and multimodal feedback, thus enhancing the product's practicality and user experience.

[0044] Example 2 Reference Figure 4 The difference between this embodiment and Embodiment 1 is that the second housing 17 is provided with an adjustment button 174 for adjusting the display mode. The adjustment button 174 is electrically connected to the controller and can be a mechanical button. The user can select different display modes, such as displaying temperature and humidity or displaying battery level, through the adjustment button 174.

[0045] Reference Figure 4 The second housing 17 is provided with a cover plate 2, which includes a connecting rod 21 hinged to the second housing 17 and a fixing plate 22 disposed on the connecting rod 21. The connecting rod 21 can be a metal rod, which is strong and durable. The fixing plate 22 can rotate around the hinge point between the connecting rod 21 and the second housing 17, making it convenient for the user to open or close the fixing plate 22.

[0046] Reference Figure 5 A fixed suction cup 23 is slidably provided on the side of the fixed plate 22 near the second housing 17. The fixed suction cup 23 includes an adsorption part 231 and a sliding part 232 provided on the adsorption part 231. The adsorption part 231 can be made of rubber, which has good adsorption properties and can be firmly adsorbed onto the surface of the object.

[0047] Reference Figure 6 The fixed plate 22 has a sliding hole 221 for sliding the sliding part 232. A fixing spring 222 is provided in the sliding hole 221. One end of the fixing spring 222 is connected to the sliding part 232 and the other end is connected to the hole wall of the sliding hole 221. The fixing spring 222 has the tendency to drive the sliding part 232 into the sliding hole 221.

[0048] Reference Figure 6 A locking rod 223 is slidably disposed in the sliding hole 221. The locking rod 223 extends out of the fixing plate 22 along the sliding hole 221. By pressing the locking rod 223, the fixing suction cup 23 is firmly attached to the second housing 17. The minimum distance between the suction part 231 and the fixing plate 22 is greater than the maximum distance between the adjustment button 174 and the second housing 17. This ensures that the fixing suction cup 23 can abut between the fixing plate 22 and the second housing 17, making it less likely that the fixing plate 22 will accidentally press the adjustment button 174.

[0049] Reference Figure 6 and Figure 7 The fixing plate 22 has a fastening screw hole 224, and a fastening bolt 225 is threaded into the fastening screw hole 224. The fixing plate 22 also has a connecting hole 226 communicating with the fastening screw hole 224. The connecting hole 226 communicates with the sliding hole 221. An abutment block 227 is slidably disposed in the connecting hole 226. The abutment block 227 has a guide slope 228, which is used to guide the abutment block 227 into the sliding hole 221.

[0050] Reference Figure 7 The sliding part 232 has a pushing groove 233 for the abutment block 227 to extend into. The groove wall of the pushing groove 233 has a guiding slope 234, which guides the sliding part 232 to move closer to the adsorption part 231 when the abutment block 227 approaches it. When the fastening bolt 225 is tightened, the abutment block 227 enters the sliding hole 221 under the push of the fastening bolt 225. Then, the abutment block 227 pushes the sliding part 232 towards the adsorption part 231, causing the adsorption part 231 to adhere to the wall surface, further enhancing the fixing effect on the doorbell.

[0051] Reference Figure 4 and Figure 8The second housing 17 is provided with a mounting base 3 for hinged connection of the connecting rod 21. The mounting base 3 is provided with a locking groove 31. A locking block 311 is provided in the locking groove 31. A locking spring is provided on the locking block 311. The locking spring has the tendency to drive the locking block 311 out of the locking groove 31.

[0052] Reference Figure 8 The locking block 311 is provided with a first inclined surface 312, which is used to guide the locking block 311 into the locking groove 31 when the fixing plate 22 abuts against the locking block 311. When the fixing plate 22 rotates to its maximum angle towards the first housing 16, the locking block 311 abuts against the side of the fixing plate 22 away from the second housing 17, thereby locking the fixing plate 22 and preventing it from rotating arbitrarily.

[0053] The implementation principle of a doorbell with a display function in this application embodiment is as follows: An adjustment button 174 allows users to easily adjust the display mode, increasing the doorbell's interactivity. The inclusion of a cover plate 2, a suction cup 23, and a locking block 311 improves the doorbell's ease of use and stability. When placing the doorbell on a table, the desired display mode can be adjusted using the adjustment button 174. Then, the cover plate 2 is rotated towards the second housing 17, and the locking lever 223 is pressed, causing the suction cup 23 to adhere to the second housing 17. The cover plate 2 prevents accidental activation of the adjustment button 174 when no adjustment of the display mode is needed, and also serves a waterproof function. When installing the doorbell on a wall, simply rotate the cover plate 2 away from the second housing 17, and then fix the fixing plate 22 to the wall using the fastening bolts 225. At this time, the suction cup 23 will automatically extend and adhere to the wall, further enhancing the doorbell's installation stability.

[0054] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A doorbell with display function, comprising a housing (1), a loudspeaker (11) and a trigger button arranged on the housing (1), an energy storage battery (18) for powering the doorbell is arranged in the housing (1), characterized in that: The housing (1) is provided with an LED bead (12), a display frame (13), a PCB board (14) and a temperature and humidity sensor (15). The display frame (13) has a light-transmitting hole (131) for light to pass through. The LED bead (12) is mounted on the PCB board (14). The display frame (13) is located on one side of the PCB board (14). The temperature and humidity sensor (15) is electrically connected to a controller, which is electrically connected to the LED bead (12).

2. The doorbell with display function according to claim 1, characterized in that: The display frame (13) has a transparent plate (19) on the side away from the PCB board (14). The transparent plate (19) is connected to the outer shell (1). The aperture of the light-transmitting hole (131) gradually increases from the PCB board (14) to the transparent plate (19).

3. The doorbell with display function according to claim 1, characterized in that: The outer casing (1) is provided with a power supply port (173), and the power supply port (173) is provided with a wire that is electrically connected to the energy storage battery (18).

4. The doorbell with display function according to claim 1, characterized in that: The outer casing (1) includes a first casing (16) and a second casing (17). The display frame (13) is disposed in the first casing (16). The second casing (17) is provided with an adjustment button (174) for adjusting the display mode. The adjustment button (174) is electrically connected to the controller. The second casing (17) is provided with a cover plate (2). The cover plate (2) includes a connecting rod (21) hinged to the second casing (17) and a fixing plate (22) disposed on the connecting rod (21).

5. The doorbell with display function according to claim 4, characterized in that: A fixed suction cup (23) is slidably disposed on the side of the fixed plate (22) near the second housing (17). The fixed suction cup (23) includes an adsorption part (231) and a sliding part (232) disposed on the adsorption part (231). A sliding hole (221) is provided on the fixed plate (22) for the sliding part (232) to slide. A fixed spring (222) is provided in the sliding hole (221). One end of the fixed spring (222) is connected to the sliding part (231). 2) The upper end is connected to the wall of the sliding hole (221). The fixing spring (222) has the tendency to drive the sliding part (232) into the sliding hole (221). A locking rod (223) is slidably arranged in the sliding hole (221). The locking rod (223) extends out of the fixing plate (22) along the sliding hole (221). The minimum distance between the adsorption part (231) and the fixing plate (22) is greater than the maximum distance between the adjustment button (174) and the second housing (17).

6. The doorbell with display function according to claim 5, characterized in that: The fixing plate (22) has a fastening screw hole (224) with a fastening bolt (225) threaded into it. The fixing plate (22) also has a connecting hole (226) communicating with the fastening screw hole (224). The connecting hole (226) communicates with the sliding hole (221), and a sliding abutment block (227) is slidably disposed in the connecting hole (226). The abutment block (227) has a guide slope (228). The guide slope (228) is used to guide the abutment block (227) into the sliding hole (221). The sliding part (232) is provided with a push groove (233) for the abutment block (227) to extend into. The push groove (233) is provided with a guide slope (234) on its groove wall. The guide slope (234) is used to guide the sliding part (232) to move closer to the adsorption part (231) when the abutment block (227) approaches the sliding part (232).

7. The doorbell with display function according to claim 6, characterized in that: The second housing (17) is provided with a mounting base (3) for hinged connection of the connecting rod (21). The mounting base (3) is provided with a locking groove (31). A locking block (311) is provided in the locking groove (31). A locking spring is provided on the locking block (311). The locking spring has a tendency to drive the locking block (311) out of the locking groove (31). A first inclined surface (312) is provided on the locking block (311). The first inclined surface (312) is used to guide the locking block (311) into the locking groove (311) when the fixing plate (22) abuts against the locking block (311). When the fixing plate (22) rotates to the maximum angle in the direction closer to the first housing (16), the locking block (311) abuts against the side of the fixing plate (22) away from the second housing (17).

8. A doorbell with a display function according to claim 4, characterized in that: The first housing (16) and the second housing (17) are detachably connected.

9. A doorbell with a display function according to claim 8, characterized in that: The first housing (16) has a connecting screw hole (161), and the second housing (17) has a clearance hole (171). A connecting bolt (172) passes through the clearance hole (171) and is threaded into the connecting screw hole (161).

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