Smart mower

Abstract

The application relates to an intelligent mower, which comprises a shell, a battery pack for supplying power to the intelligent mower, the battery pack being installed in the shell, a charging terminal installed in the shell and electrically connected with the battery pack, and a charging station connected with the charging terminal to charge the battery pack. The intelligent mower further comprises an infrared sensing device for guiding the intelligent mower to return to the charging station. The shell comprises a terminal seat for bearing the charging terminal, and the infrared sensing device is installed in the terminal seat. The infrared sensing device for realizing the return charging guidance is fixedly installed in the terminal seat, so that the infrared sensor does not need additional materials for support and fixation, the manufacturing cost is reduced, and the structure of the intelligent mower is more compact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of garden tools, in particular to an intelligent mower. BACKGROUND

[0002] The intelligent mower generally comprises a casing, a moving device, a cutting device and a battery pack, which can provide the moving device and the cutting device with the required power for work. When in use, a to-be-cut area for the intelligent mower to move is set on the lawn in advance, and a charging station is arranged in the to-be-cut area. When detecting that the battery pack has a low power, the intelligent mower can automatically return to the charging station and be connected with a charging terminal in the charging station, so as to charge the battery pack. After detecting that the power in the battery pack meets the work requirement, the intelligent mower will automatically drive away from the charging station and continue to complete the trimming of the lawn in the to-be-cut area.

[0003] On the market, there are many ways to realize the return charging guidance of the intelligent mower. Among them, the intelligent mower is provided with an infrared sensing device and cooperates with the charging station to realize the return charging guidance. As for how to install the infrared sensing device on the intelligent mower, the mainstream installation method is that the intelligent mower is provided with a fixed seat to carry the infrared sensing device, and the fixed seat is installed on the outer surface of the casing to realize the fixed connection between the infrared sensing device and the intelligent mower.

[0004] However, the above-mentioned installation method of the infrared sensing device has the following problems. On the one hand, an additional fixed seat needs to be designed to install the infrared sensing device, which is high in cost. On the other hand, the fixed seat is installed on the outer surface of the intelligent mower, so that the infrared sensing device is easily affected by external environmental light such as sunlight and is triggered by mistake.

[0005] Therefore, it is necessary to provide an improved intelligent mower to overcome the defects in the prior art. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide an intelligent mower with high return charging accuracy and low installation cost of the infrared sensing device.

[0007] The present application solves the problems of the prior art by using the following technical solution: an intelligent mower, comprising: a casing; a battery pack installed on the casing and providing power for the intelligent mower; a charging terminal installed on the casing and electrically connected with the battery pack, the charging terminal being connected with a charging station to charge the battery pack; the intelligent mower further comprises an infrared sensing device for guiding the intelligent mower to return to the charging station, the casing comprises a terminal seat carrying the charging terminal, and the infrared sensing device is installed on the terminal seat.

[0008] Further, the shell further comprises a first shell and a second shell connected with the first shell and defining a first cavity, the terminal seat is connected with the first shell and defines a second cavity, the first cavity and the second cavity are communicated.

[0009] Further, the shell further comprises a first seal arranged at the connection between the first shell and the second shell and a second seal arranged at the connection between the first shell and the terminal seat.

[0010] Further, the direction in which the intelligent mower enters the charging station is defined as forward, the shell further comprises a light shield arranged at least partially in front of the terminal seat, the light shield is connected with the first shell and / or the second shell and defines a third cavity, the terminal seat is accommodated in the third cavity.

[0011] Further, the first shell comprises a first opening communicated with the first cavity, the terminal seat comprises a second opening communicated with the second cavity, the first opening and the second opening are communicated.

[0012] Further, the intelligent mower further comprises a first wire and a control device electrically connected with the infrared sensing device through the first wire, the control device is arranged at least partially in the first cavity, the infrared sensing device is arranged in the second cavity, the first wire extends from the second cavity through the first opening and the second opening to the first cavity.

[0013] Further, the intelligent mower further comprises a second wire extending from the second cavity through the first opening and the second opening to the first cavity, the charging terminal is electrically connected with the control device through the second wire.

[0014] Further, the first opening is open downward along the height direction of the intelligent mower, the second opening is open upward along the height direction of the intelligent mower.

[0015] Further, the charging terminal comprises a first electrode and a second electrode, the first electrode and the second electrode are both accommodated in the second cavity, the infrared sensing device is mounted between the first electrode and the second electrode.

[0016] Further, the terminal seat further comprises a third opening communicated with the second cavity and a light-transmitting sheet for external light to pass through, the light-transmitting sheet is mounted in the third opening and cooperates with the third opening to close the third opening.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The intelligent lawnmower includes a housing, a battery pack installed in the housing and supplying power to the intelligent lawnmower, and a charging terminal electrically connected to the battery pack. The charging terminal is connected to a charging station to charge the battery pack. The intelligent lawnmower also includes an infrared sensing device to guide the intelligent lawnmower back to the charging station. The housing includes a terminal block that carries the charging terminal, and the infrared sensing device is installed in the terminal block. Thus, by fixing the infrared sensing device used to guide the return to the charging station to the terminal block, the infrared sensing device does not require additional support components, reducing manufacturing costs and making the structure of the intelligent lawnmower more compact. Attached Figure Description

[0018] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the automatic working system in a preferred embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A partial sectional view of the automated working system shown.

[0021] Figure 3 yes Figure 2 A magnified view of part A in the automated working system shown;

[0022] Figure 4 yes Figure 1 The diagram shows the structure of the terminal block of the intelligent lawnmower in the automated working system.

[0023] Meaning of the reference numerals in the diagram:

[0024] Smart lawnmower 100 housing 1

[0025] First outer shell 11 First opening 111

[0026] Second outer shell 12 Light-transmitting opening 13

[0027] First opening wall 131 Second opening wall 132

[0028] Light entry point 133 Terminal block 14

[0029] Second opening 141 Third opening 142

[0030] Transmitter 143, First cavity 15

[0031] Second cavity 16 Third cavity 17

[0032] Light shield 18, walking module 2

[0033] Drive wheel 21 Auxiliary wheel 22

[0034] Cutting module 3 Cutting part 31

[0035] Cutting motor 32, motor barrel 33

[0036] Control module 4, Energy module 5

[0037] Infrared sensor 6 Circuit board 61

[0038] 62 LEDs, 7 charging terminals

[0039] First electrode 71 Second electrode 72

[0040] First seal 81 Second seal 82

[0041] First conductor 91 Second conductor 92 Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. In the description of this specification, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0043] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," and "rear" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0044] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Please see Figures 1 to 4 The diagram shows an automatic working system according to an embodiment of the present invention, including an intelligent lawnmower 100 and a charging station 200 for the intelligent lawnmower 100 to dock and charge.

[0046] The intelligent mower 100 autonomously moves and mows in a working area, and comprises a housing 1, a walking module 2 for supporting the housing 1 to move, a cutting module 3 arranged at the bottom of the housing 1, a control module 4 arranged in the housing 1 and used for controlling the automatic operation of the walking module 2 and the automatic work of the cutting module 3, and an energy module 5 used for supplying energy for the intelligent mower 100.

[0047] The housing 1 comprises a first shell 11 and a second shell 12 connected with the first shell 11, wherein the first shell 11 is used for mounting functional mechanisms and functional modules such as the walking module 2, the cutting module 3, the control module 4 and the energy module 5, and the second shell 12 is configured to at least partially cover the first shell 11 and mainly plays a role of enhancing the appearance and recognition of the intelligent mower 100. It should be noted that the first shell 11 serves as a base for mounting various functional mechanisms and functional modules, and the second shell 12 serves as an upper cover, which is only an optional embodiment of the present application. In other embodiments, the second shell 12 can serve as a base, and the first shell 11 can serve as an upper cover.

[0048] The walking module 2 is used to drive the intelligent mower 100 to walk in the working area, and comprises driving wheels 21 and auxiliary wheels 22 mounted on the housing 1. Specifically, the driving wheels 21 are provided with two and connected with corresponding walking motors (not shown), the walking motors drive the driving wheels 21 to rotate to realize the automatic walking of the intelligent mower 100, and the auxiliary wheels 22 mainly play a role of auxiliary support, the number of the auxiliary wheels 22 is one or two, and the auxiliary wheels 22 are located at the front of the intelligent mower 100. The auxiliary wheels 22 are not connected with the walking motors, but are driven to roll when supporting the intelligent mower 100 to walk. Through the above structure, the intelligent mower 100 can be controlled by the control module 4 to flexibly walk and turn on the working surface. When walking normally, the two walking motors output the same rotating speed to directly drive or indirectly drive the intelligent mower 100 to move through a gear or a belt transmission structure, and the auxiliary wheels 22 also roll; when turning, the two walking motors output different rotating speeds, and the intelligent mower 100 turns to the side of the driving wheel 21 with a lower rotating speed, or the side of the driving wheel 21 corresponding to the direction of retreat.

[0049] The cutting module 3 at least comprises a cutting member 31 for cutting the turf and a cutting motor 32 for driving the cutting member 31 to move. Specifically, the cutting motor 32 is mounted on the first housing 11 of the housing 1, and the cutting motor 32 is electrically connected with the control module 4, which can control the start and stop of the cutting motor 32 and adjust the rotating speed of the cutting motor 32; the cutting motor 32 is accommodated in a motor cylinder 33, and a four-bar linkage structure 34 is further arranged between the motor cylinder 33 and the first housing 11, and the four-bar linkage structure 34 is rotatably connected with the motor cylinder 33 and the first housing 11, so that when the intelligent mower 100 encounters obstacles such as stones and low shrubs during walking, the cutting member 31 will not collide with the above-mentioned obstacles, but will be pushed by the above-mentioned obstacles and drive the motor cylinder 33 to move in the height direction, so that on the one hand, the cutting member 31 can be prevented from being damaged by hard collision with the obstacles; on the other hand, the obstacle crossing ability of the intelligent mower 100 is improved. It should be noted that the cutting member 31 can be a cutting disc and a plurality of cutting blades mounted on the cutting disc, or a single cutting blade, which is not limited here.

[0050] The control module 4 is used for controlling the automatic walking and working of the intelligent mower 100, and the functions executed include controlling the cutting module 3 to start working or stop, generating a walking path and controlling the walking module 2 to walk according to the walking path, receiving the environmental signals detected by the intelligent mower 100, judging the power of the energy module 5 and timely controlling the intelligent mower 100 to return to the charging station 200 for automatic docking and charging, and the like.

[0051] The energy module 5 is used for supplying power to the intelligent mower 100 and is mounted on the above-mentioned housing 1. Specifically, the energy module 5 is constructed as a battery pack, and the first housing 11 is provided with a battery pack compartment (not shown), and the battery pack is detachably mounted in the battery pack compartment. The battery pack is electrically connected with the above-mentioned battery pack compartment, and the battery pack compartment extends a wire (not shown) to be electrically connected with the above-mentioned walking module 2, cutting module 3 and control module 4, so as to realize the energy supply of the battery pack to the above-mentioned functional modules.

[0052] For the convenience of understanding, in the present application, the horizontal working surface through which the intelligent mower 100 walks during the cutting operation is taken as the reference object, the plane parallel to the horizontal working surface is taken as the horizontal plane, the direction perpendicular to the horizontal working surface is taken as the height direction of the intelligent mower 100, and the direction in which the intelligent mower 100 enters the charging station 200 is taken as the forward direction.

[0053] The intelligent mower 100 is provided with a charging terminal 7 electrically connected with the battery pack, and correspondingly, the charging station 200 is provided with a docking terminal (not shown), when the intelligent mower 100 is docked with the charging station 200, the docking terminal of the charging station 200 is connected with the charging terminal 7 of the above-mentioned intelligent mower 100 to charge the battery pack.

[0054] The charging station 200 has a flat plate for the smart mower 100 to stop, which is laid on the ground. When the smart mower 100 is located on the flat plate as a whole, the uneven ground can be prevented from causing the smart mower 100 to be tilted, so that the above-mentioned docking terminal and the charging terminal 7 cannot be docked.

[0055] The smart mower 100 further comprises an infrared sensing device 6 for guiding the smart mower 100 to return to the charging station 200. Specifically, the infrared sensing device 6 of the smart mower 100 is configured as an infrared receiving device for receiving an infrared signal. Correspondingly, the charging station 200 is also provided with an infrared transmitting device (not shown) for transmitting an infrared signal, which cooperates with the above-mentioned infrared receiving device to guide the smart mower 100 to return to the charging station 200. During the process of returning to charge and docking with the charging station 200, the control module 4 of the smart mower 100 can determine the steering of the smart mower 100 according to the received infrared signal, and can continuously adjust the steering according to the direction of the charging station 200 until the smart mower 100 is opposite to the charging station 200. The control module 4 controls the smart mower 100 to walk in the direction opposite to the charging station 200 until the smart mower 100 is docked with the charging station 200.

[0056] The housing 1 further comprises a terminal seat 14 carrying the charging terminal 7, and the above-mentioned infrared sensing device 6 is mounted on the terminal seat 14. Specifically, the terminal seat 14 is mounted on the first shell 11, and the charging terminal 7 is fixedly mounted on the terminal seat 14, and the fixed mounting mode includes but is not limited to welding or injection molding. In the embodiment, by fixing the infrared sensing device 6 for realizing the return charging guidance on the terminal seat 14, the infrared sensing device 6 does not need additional material for support and fixation, which reduces the manufacturing cost and makes the structure of the smart mower 100 more compact.

[0057] The second shell 12 is arranged above the first shell 11, and the first shell 11 and the second shell 12 are connected and define a first cavity 15, the terminal seat 14 is connected with the first shell 11 and defines a second cavity 16, and the first cavity 15 and the second cavity 16 are communicated. Specifically, the connection part of the first shell 11 and the second shell 12 is provided with a first sealing member 81, and the connection part of the first shell 11 and the terminal seat 14 is provided with a second sealing member 82, and the infrared sensing device 6 is installed in the second cavity 16. In the embodiment, by arranging the first sealing member 81 and the second sealing member 82, the first cavity 15 and the second cavity 16 are in fluid communication with each other, but are isolated from the external environment. In this way, on the one hand, the infrared sensing device 6 housed in the second cavity 16 is isolated from the external environment, the waterproof sealing effect is good, and the service life of the infrared sensing device is prolonged; on the other hand, compared with the additional design of a fixing seat to install the infrared sensing device 6, the waterproof sealing of the infrared sensing device 6 in the embodiment is realized through the sealing between the terminal seat 14 and the first shell 11, without the need for additional sealing devices, the structure is simple, and the cost is reduced.

[0058] Further, the charging terminal 7 includes a first electrode 71 and a second electrode 72, and the first electrode 71 and the second electrode 72 are respectively accommodated in the second cavity 16, and the infrared sensing device 6 is installed between the first electrode 71 and the second electrode 72. In the embodiment, by installing the infrared sensing device 6 between the first electrode 71 and the second electrode 72, the space between the first electrode 71 and the second electrode 72 is reasonably utilized, so that the terminal seat 14 structure is more compact, and the intelligent mower 100 structure is further more compact.

[0059] The first shell 11 includes a first opening 111 communicated with the first cavity 15, the terminal seat 14 includes a second opening 141 communicated with the second cavity 16, and the first opening 111 and the second opening 141 are communicated. Specifically, the above-mentioned charging terminal 7 and the control device 4 or the battery pack are electrically connected through the second lead wire 92, and the second lead wire 92 extends from the second cavity 16 through the first opening 111 and the second opening 141 to the first cavity 15. Further, the control device 4 and the infrared sensing device 6 are electrically connected through the first lead wire 91, the control device 4 is at least partially arranged in the first cavity 15, and the infrared sensing device 6 is arranged in the second cavity 16, and the above-mentioned first lead wire 91 extends from the second cavity 16 through the first opening 111 and the second opening 141 to the first cavity 15.

[0060] In this way, in this embodiment, the communication between the first cavity 15 and the second cavity 16 is achieved through the first opening 111 and the second opening 141 that are in communication with each other, and the first wire 91 for electrically connecting the infrared sensing device 6 and the control module 4 and the second wire 92 for electrically connecting the charging terminal 7 and the control module 4 or the battery pack are routed through the first opening 111 and the second opening 141, so that, on the one hand, the wiring arrangement of the intelligent mower is simplified, and waterproof sealing design is easy to implement; on the other hand, compared with the additional design of a fixing seat to install the infrared sensing device 6, the infrared sensing device 6 and the charging terminal 7 in this embodiment share a wiring channel, which is lower in cost and simplifies the structure of the intelligent mower 100.

[0061] Further, the terminal seat 14 further includes a third opening 142 in communication with the second cavity 16 and a light-transmitting sheet 143 for allowing external light to pass through, the light-transmitting sheet 143 is installed in the third opening 142 and cooperates with the third opening 142 to close the third opening 142. Specifically, the infrared sensing device 6 is installed in the above-mentioned second cavity 16, and the terminal seat 14 is provided with the third opening 142, the third opening 142 is located in front of the infrared sensing device 6, and external light can enter the second cavity 16 through the third opening 142, so that the infrared sensing device 6 can receive external light through the third opening 142. It should be noted that in this embodiment, the third opening 142 is also provided with the light-transmitting sheet 143, the light-transmitting sheet 143 covers the third opening 142 and closes the third opening 142, and the connection mode of the third opening 142 and the light-transmitting sheet 143 can be adhesive bonding or injection molding, so as to improve the sealing performance of the terminal seat 14.

[0062] Further, the first opening 111 is open downward along the height direction of the intelligent mower 100, and the second opening 141 is open upward along the height direction of the intelligent mower 100. Specifically, the first opening 111 and the second opening 141 that are in communication with each other are open opposite to each other along the height direction of the intelligent mower 100, so that the first wire 91 and the second wire 92 do not need to be bent to adjust the wiring direction during the process of extending from the second cavity 16 through the first opening 111 and the second opening 141 to the first cavity 15, further simplifying the wiring arrangement of the intelligent mower 100.

[0063] The shell 1 further comprises a light shield 18 disposed at least partially in front of the terminal seat 14, the light shield 18 being connected with the first shell 11 and / or the second shell 12 and defining a third cavity 17 in which the terminal seat 14 is accommodated. Specifically, the light shield 18 is partially disposed in front of the terminal seat 14 and partially disposed above the terminal seat 14 to cover the terminal seat 14, and the light shield 18 is connected with the first shell 11 and defines the third cavity 17 in which the terminal seat 14 is accommodated. In this way, when the intelligent mower 100 is working in an outdoor environment, sunlight and other environmental light are difficult to irradiate the infrared receiving device 6 deeply buried in the shell 1 due to the shielding of the light shield 18, so that the infrared receiving device 6 will not be triggered by the infrared light in the sunlight and other environmental light, and the intelligent mower 100 can accurately perform the charging action without being affected by the environmental light.

[0064] Further, the infrared sensing device 6 of the intelligent mower 100 is disposed in the interior of the shell 1 to avoid direct irradiation of external light. Specifically, the light shield 18 is further provided with a light transmission port 13, and the infrared sensing device 6 receives external light only through the light transmission port 13. The mounting position of the infrared sensing device 6 and the light transmission port 13 are spaced apart by not less than 30 mm in the horizontal direction. In this way, when the intelligent mower 100 is working in an outdoor environment, sunlight and other environmental light are difficult to irradiate the infrared sensing device 6 deeply buried in the shell 1, so that the infrared sensing device 6 will not be triggered by the infrared light in the sunlight and other environmental light, and the intelligent mower 100 can accurately perform the charging action without being affected by the environmental light.

[0065] The infrared sensing device 6 comprises a circuit board 61 and a lamp bead 62 mounted on the circuit board 61, and external light irradiates the lamp bead 62 through the light transmission port 13. Specifically, the light transmission port 13 comprises a first opening wall 131 and a second opening wall 132 disposed below the first opening wall 131. In the height direction of the intelligent mower 100, the mounting position of the lamp bead 62 is located between the first opening wall 131 and the second opening wall 132. In this way, the infrared emitting device of the charging station 200 can be disposed opposite to the infrared sensing device 6 of the intelligent mower 100. When the intelligent mower 100 is connected for charging, the infrared light beam emitted by the infrared emitting device can quickly pass through the light transmission port 13 to be received by the lamp bead 62, thereby facilitating the charging connection between the intelligent mower 100 and the charging station 200 and improving the charging connection efficiency.

[0066] Further, the light-transmitting port 13 further comprises a light-injection point 133, which is arranged at the lowermost end of the first opening wall 131 and at the frontmost end of the first opening wall 131, and the included angle between the connecting line L1 between the light-injection point 133 and the center point of the lamp bead 62 and the horizontal line L2 is not greater than 15 degrees. In the embodiment, the size of the light-transmitting port 13 and the horizontal distance between the lamp bead 62 and the light-transmitting port 13 are comprehensively designed, so that most of the sunlight is blocked by the first opening wall 131 and cannot irradiate the lamp bead 62 through the light-transmitting port 13, thereby further reducing the influence of the ambient light such as sunlight on the infrared charging docking between the intelligent mower 100 and the charging station 200, and improving the charging docking efficiency.

[0067] The present application is not limited to the above-mentioned specific embodiments. Those skilled in the art can easily understand that the intelligent mower of the present application has many alternative solutions without departing from the principles and scope of the present application. The protection scope of the present application is subject to the contents of the claims.

Claims

1. A smart lawnmower, comprising: case; A battery pack, installed in the housing, supplies power to the smart lawnmower; A charging terminal is installed in the housing and electrically connected to the battery pack. The charging terminal is connected to a charging station to charge the battery pack. The intelligent lawnmower is characterized by the following features: it further includes an infrared sensing device for guiding the intelligent lawnmower back to the charging station; the housing includes a terminal block for carrying the charging terminal; the infrared sensing device is mounted on the terminal block; the housing further includes a first outer shell and a second outer shell connected to the first outer shell and defining a first cavity; the terminal block is connected to the first outer shell and defines a second cavity; the first cavity and the second cavity are in communication; the charging terminal includes a first electrode and a second electrode, both of which are housed in the second cavity; and the infrared sensing device is mounted between the first electrode and the second electrode.

2. The intelligent lawnmower according to claim 1, characterized in that: The housing further includes a first seal disposed at the connection between the first outer shell and the second outer shell, and a second seal disposed at the connection between the first outer shell and the terminal block.

3. The intelligent lawnmower according to claim 1, characterized in that: The direction in which the smart lawnmower enters the charging station is defined as forward. The housing also includes a light shield that is at least partially disposed in front of the terminal block. The light shield is connected to the first housing and / or the second housing and defines a third cavity. The terminal block is housed in the third cavity.

4. The intelligent lawnmower according to claim 1, characterized in that: The first housing includes a first opening communicating with the first cavity, and the terminal block includes a second opening communicating with the second cavity, wherein the first opening and the second opening are in communication.

5. The intelligent lawnmower according to claim 4, characterized in that: The intelligent lawnmower also includes a first wire and a control device electrically connected to the infrared sensor via the first wire. The control device is at least partially disposed in the first cavity, and the infrared sensor is disposed in the second cavity. The first wire extends from the second cavity through the first opening and the second opening into the first cavity.

6. The intelligent lawnmower according to claim 5, characterized in that: The intelligent lawnmower also includes a second wire extending from the second cavity through the first opening and the second opening into the first cavity, and the charging terminal is electrically connected to the control device through the second wire.

7. The intelligent lawnmower according to claim 4, characterized in that: The first opening opens downwards along the height direction of the smart lawnmower, and the second opening opens upwards along the height direction of the smart lawnmower.

8. The intelligent lawnmower according to claim 4, characterized in that: The terminal block also includes a third opening communicating with the second cavity and a light-transmitting sheet for external light to pass through. The light-transmitting sheet is installed in the third opening and cooperates with the third opening to close the third opening.

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