Formaldehyde detection device

Abstract

The utility model provides a formaldehyde detection device. The formaldehyde detection device comprises a shell assembly, a machine core plate, a plurality of display units, a power supply assembly and a vibration unit, an air inlet, an air outlet and a detection cavity are formed in the shell assembly, and the air inlet and the air outlet correspondingly communicate with the detection cavity to form a detection air channel; the machine core plate is arranged on the detection air duct and fixedly connected to the inner wall surface of the detection cavity to obtain the formaldehyde concentration; the display units are arranged in the detection cavity, and the multiple display units are arranged at intervals in the extension direction of the machine core plate and used for displaying a test result according to the formaldehyde concentration; the power supply assembly is arranged on the shell assembly and used for providing energy for the machine core plate and the display unit. The vibration unit is arranged in the detection cavity and used for sending out a vibration signal when the power supply assembly starts to work. According to the formaldehyde detection device provided by the invention, a detection result is visually fed back through the display unit and the vibration unit, meanwhile, the internal structure is relatively simple, and the production cost is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of monitoring devices, and more specifically, to a formaldehyde detection device. Background Art

[0002] Formaldehyde is a colorless gas with high volatility and a strong pungent smell. Formaldehyde has a strong irritating effect on human skin and can cause skin eczema and systemic allergies. The World Health Organization has identified formaldehyde as a Class 1 carcinogen. There are multiple sources of formaldehyde indoors, including various phenolic resin adhesive panels used as decorative materials such as wall panels and ceilings, as well as indoor displays and daily necessities that may emit formaldehyde, such as furniture, chemical fiber carpets, and foam plastics. Therefore, for building materials, furniture materials, etc., before they are completed and put into use, they are generally tested for formaldehyde content using formaldehyde testing devices.

[0003] In the related art, the formaldehyde detection device is controlled by chip integration and the results are displayed on an LCD screen. However, the formaldehyde detection device configured in this way is usually bulky and has a high production cost. It is only used as a common means for manufacturers to conduct factory inspections on the production side. For users who need to test for formaldehyde after purchasing furniture and other products, the experience is not good enough. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a formaldehyde detection device, aiming to improve the deficiencies of the above-mentioned prior art, further simplify the structural spatial arrangement of the formaldehyde detection device and optimize the feedback method of the results, so as to provide convenience for users.

[0005] To achieve the above purpose, the formaldehyde detection device proposed in this application includes:

[0006] A shell component, wherein the shell component is formed with an air inlet, an air outlet and a detection cavity, and the air inlet and the air outlet are correspondingly connected to the detection cavity to form a detection air duct;

[0007] A core board, which is arranged in the detection air duct and fixedly connected to the inner wall of the detection cavity to obtain the formaldehyde concentration;

[0008] A plurality of display units, the display units are arranged in the detection cavity and electrically connected to the core board, and the plurality of display units are arranged at intervals along the extension direction of the core board to display the test results according to the formaldehyde concentration;

[0009] A power supply component, which is disposed on the housing component and electrically connected to the movement board to provide energy for the movement board and the display unit; and

[0010] A vibration unit is disposed in the detection cavity and electrically connected to the movement board so as to send out a vibration signal when the power supply component starts to work.

[0011] As a feasible implementation mode, the shell assembly includes an upper shell and a lower shell, and the upper shell and the lower shell are detachably connected to enclose the detection cavity, the air inlet and the air outlet are arranged on the upper shell, and the movement board and the power supply assembly are arranged on the lower shell.

[0012] As a feasible implementation, the upper shell is provided with a plurality of light-transmitting grooves, the number of which corresponds to the display unit settings, and the display unit is arranged on the movement board and arranged toward the light-transmitting grooves, so that each of the display units is at least partially exposed in one of the light-transmitting grooves.

[0013] As a feasible implementation manner, the upper shell is formed with a mounting groove, the shell assembly further includes a display plug-in board, the light-transmitting groove is arranged on the display plug-in board, and the display plug-in board is inserted into the mounting groove.

[0014] As a feasible implementation manner, the housing assembly further includes a display cover plate, which is disposed on a side of the upper housing away from the lower housing and completely covers each of the light-transmitting grooves.

[0015] As a feasible implementation manner, the display cover is formed with a plurality of display slots, the number of the display slots corresponds to the arrangement of the light-transmitting slots, and the width of the display slots is smaller than that of the light-transmitting slots.

[0016] As a feasible implementation manner, the display cover is made of a light-transmitting material.

[0017] As a feasible implementation manner, the display cover is further provided with a switch button, and the upper shell is correspondingly formed with an avoidance hole so that the switch button can movably abut against the vibration unit.

[0018] As a feasible implementation manner, the lower shell is provided with a mounting platform protruding toward the upper shell, and the movement plate is fixedly connected to the mounting platform.

[0019] As a feasible implementation mode, a receiving groove is formed on the side of the lower shell facing away from the upper shell corresponding to the mounting platform, and the shell assembly also includes a battery cover, which is detachably connected to the lower shell and enclosed with the receiving groove to form a battery cavity, and the power supply assembly is arranged in the battery cavity.

[0020] Compared with the prior art, the formaldehyde detection device provided in the embodiment of the present application has the following beneficial effects:

[0021] The formaldehyde monitoring device is provided with a shell component, a movement board, a plurality of display units, a power supply component and a vibration unit. The shell component is formed with an air inlet, an air outlet and a detection cavity, and the air inlet and the air outlet are connected to the detection cavity correspondingly to form a detection air duct; the movement board is arranged in the detection air duct and fixedly connected to the inner wall of the detection cavity to obtain the formaldehyde concentration; the display unit is arranged in the detection cavity, and a plurality of display units are arranged at intervals along the extension direction of the movement board to display the test results according to the formaldehyde concentration; the power supply component is arranged in the shell component to provide energy for the movement board and the display unit; the vibration unit is arranged in the detection cavity to send a vibration signal when the power supply component starts working. The display unit forms a light signal to be captured by the human eye; at the same time, the vibration unit intuitively feedbacks whether the formaldehyde detection device has entered the working state, while ensuring the efficiency of obtaining the detection results, it has a relatively simple internal structure and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 Schematic diagram of the explosion structure of the formaldehyde detection device provided in the embodiment of the present application Figure 1 ;

[0024] Figure 2 A schematic diagram of the three-dimensional structure of a formaldehyde detection device provided in an embodiment of the present application;

[0025] Figure 3 for Figure 2 A schematic diagram of a vertical cross-sectional structure of a lower shell of a formaldehyde detection device shown;

[0026] Figure 4 for Figure 3 The three-dimensional structure of the lower shell of the formaldehyde detection device shown in FIG. Figure 2 .

[0027] Among them, the reference numerals in the figure are:

[0028] 10. Shell assembly; 11. Air inlet; 12. Upper shell; 121. Light-transmitting slot; 123. Mounting slot; 125. Avoidance hole; 13. Air outlet; 14. Lower shell; 141. Mounting platform; 143. Accommodating slot; 15. Detection cavity; 16. Display plug-in board; 17. Detection air duct; 18. Display cover; 181. Display slot; 19. Battery cover; 191. Battery cavity; 30. Movement board; 50. Display unit; 70. Power supply assembly; 90. Vibration unit. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] Formaldehyde is a colorless gas with high volatility and a strong pungent smell. Formaldehyde has a strong irritating effect on human skin and can cause skin eczema and systemic allergies. The World Health Organization has identified formaldehyde as a Class 1 carcinogen. There are multiple sources of formaldehyde indoors, including various phenolic resin adhesive panels used as decorative materials such as wall panels and ceilings, as well as indoor displays and daily necessities that may emit formaldehyde, such as furniture, chemical fiber carpets, and foam plastics. Therefore, for building materials, furniture materials, etc., before they are completed and put into use, they are generally tested for formaldehyde content using formaldehyde testing devices.

[0034] In the related art, the formaldehyde detection device is controlled by chip integration and the results are displayed on an LCD screen. However, the formaldehyde detection device configured in this way is usually bulky and has a high production cost. It is only used as a common means for manufacturers to conduct factory inspections on the production side. For users who need to test for formaldehyde after purchasing furniture and other products, the experience is not good enough.

[0035] The purpose of the embodiment of the present application is to provide a formaldehyde detection device, aiming to improve the deficiencies of the above-mentioned prior art, by forming a light signal through a display unit to be captured by the human eye; at the same time, through a vibration unit, intuitive feedback is given on whether the formaldehyde detection device has entered a working state, while ensuring the efficiency of obtaining the detection results, having a relatively simple internal structure and reducing production costs.

[0036] The following will be combined Figures 1 to 4 , Figure 1 Schematic diagram of the explosion structure of the formaldehyde detection device provided in the embodiment of the present application Figure 1 ; Figure 2 A schematic diagram of the three-dimensional structure of a formaldehyde detection device provided in an embodiment of the present application;

[0037] Figure 3 for Figure 2 A schematic diagram of a vertical cross-sectional structure of a lower shell of a formaldehyde detection device shown; Figure 4 for Figure 3 The three-dimensional structure of the lower shell of the formaldehyde detection device shown in FIG. Figure 2 , the formaldehyde detection device provided in the embodiment of the present application is described in detail through specific examples.

[0038] One embodiment of the utility model provides a formaldehyde detection device, including a housing assembly 10, a core board 30, a plurality of display units 50, a power supply assembly 70 and a vibration unit 90. The housing assembly 10 is formed with an air inlet 11, an air outlet 13 and a detection cavity 15, and the air inlet 11 and the air outlet 13 are correspondingly connected to the detection cavity 15 and form a detection air duct 17; the core board 30 is arranged in the detection air duct 17 and fixedly connected to the inner wall of the detection cavity 15 for obtaining the formaldehyde concentration; the display unit 50 is arranged in the detection cavity 15 and electrically connected to the core board 30, and the plurality of display units 50 are arranged at intervals along the extension direction of the core board 30 for displaying the test results according to the formaldehyde concentration; the power supply assembly 70 is arranged in the housing assembly 10 and electrically connected to the core board 30 for providing energy for the core board 30 and the display unit 50; the vibration unit 90 is arranged in the detection cavity 15 and electrically connected to the core board 30 for sending a vibration signal when the power supply assembly 70 starts to work.

[0039] It can be understood that the shell assembly 10 is used to form a detection channel with an air inlet 11 and an air outlet 13, and is used to guide the flow of air in the process of air entering from the air inlet 11 and being discharged from the air outlet 13, so that the air can fully contact the core board 30 arranged in the detection air duct 17, so that the sensor for capturing the formaldehyde content in the air that may exist on the core board 30 has a larger contact area with the air, that is, further ensures the measurement accuracy of the core board 30 for the formaldehyde concentration in the air to be detected, and further improves the detection accuracy of the formaldehyde detection device. On the other hand, the detection cavity 15 formed by the shell is also used to carry the core board 30, the display unit 50, the power supply component and the vibration unit 90, so that the various components of the formaldehyde detection device have a fixed positional relationship relative to each other, avoiding the possibility of being disturbed by vibration during use and thus affecting the measurement accuracy.

[0040] It should be noted that the core board 30 can be a PCB (Printed Circuit Board) board, that is, a printed circuit board, which is a basic platform for connecting electronic components together, and has a plate-like structure made of insulating material, on which conductive circuits and other metal parts are printed, for supporting and connecting electronic components. The core board 30 set as a PCB board plays the role of supporting, connecting and conducting electrical signals in the formaldehyde monitoring device. The connection between the electronic components is made more stable and reliable, and the spatial arrangement in the detection cavity 15 is optimized, thereby improving the performance and reliability of the formaldehyde detection device.

[0041] As a possible implementation, please also refer to Figure 1 and Figure 2 The shell assembly 10 includes an upper shell 12 and a lower shell 14 , which are detachably connected to enclose a detection cavity 15 , an air inlet 11 and an air outlet 13 are disposed on the upper shell 12 , and a movement board 30 and a power supply assembly 70 are disposed on the lower shell 14 .

[0042] It can be understood that, compared with the one-piece shell assembly 10, the upper shell 12 and the lower shell 14 are detachably connected to form the detection chamber 15, so that the disassembled upper shell 12 and lower shell 14 can be operated and maintained separately without moving the entire shell assembly 10, thereby further improving the maintenance efficiency of the formaldehyde detection device and reducing the operational risks.

[0043] As a possible implementation, see Figure 1 and Figure 2 The upper shell 12 is provided with a plurality of light-transmitting grooves 121 , the number of which corresponds to the number of display units 50 , and the display units 50 are arranged on the movement board 30 and toward the light-transmitting grooves 121 , so that each display unit 50 is at least partially exposed in a corresponding light-transmitting groove 121 .

[0044] It can be understood that, compared with a single light-transmitting slot 121 corresponding to a plurality of display units 50, a plurality of light-transmitting slots 121 are provided, and the number of light-transmitting slots 121 corresponds to the display unit 50, wherein the display unit 50 is provided in the direction of the light-transmitting slot 121. Specifically, the display unit 50 is used to form an optical signal and transmit the optical signal through the light-transmitting slot 121 out of the detection cavity 15 and be obtained by the user during use. The opening direction of the light-transmitting slot 121 is also the transmission direction of the optical signal formed by the display unit 50 guided by the light-transmitting slot 121. All optical signals not in this direction will be refracted or absorbed by the side wall of the light-transmitting slot 121 during the transmission process. In this way, the display effect of the optical signal displayed by the display unit 50 is further ensured, thereby further improving the display effect and transmission efficiency of the formaldehyde detection device provided with the display unit 50.

[0045] As a possible implementation, see Figure 1 The upper shell 12 is formed with a mounting groove 123 , and the shell assembly 10 further includes a display plug-in board 16 . The light-transmitting groove 121 is disposed on the display plug-in board 16 , and the display plug-in board 16 is inserted into the mounting groove 123 .

[0046] It is understandable that the display plug board 16 can be detachably connected to the installation slot 123 in ways including but not limited to plugging, snapping, sleeve connection or welding, etc., and the present application does not make specific restrictions on this. Preferably, in one embodiment, the installation slot 123 is formed in the upper shell 12, and the display plug board 16 provided with the light-transmitting slot 121 is inserted into the installation slot 123. In this way, compared with the way in which the installation slot 123 and the upper shell 12 are integrally formed, the flexibility of use of the light-transmitting slot 121 and the formaldehyde detection device is further improved. When there are different design size requirements for the light-transmitting slot 121, the replacement process of the light-transmitting slot 121 can be realized by replacing the display plug board 16. When either the display plug board 16 or the shell assembly 10 needs to be replaced due to loss during the working process, there is no need to replace the other component simultaneously, which further improves the maintenance efficiency and service life of the shell assembly 10 and the formaldehyde detection device.

[0047] As a possible implementation, see Figure 1 to Figure 2 The housing assembly 10 further includes a display cover 18 , which is disposed on a side of the upper housing 12 away from the lower housing 14 and completely covers each light-transmitting groove 121 .

[0048] It is understandable that the light-transmitting groove 121 has through holes so that when the internal display unit 50 displays the light signal toward the outside, it also makes it possible for dust, droplets and other impurities from the outside to invade the internal components such as the movement board 30 and affect the working efficiency accordingly. At this time, the display cover 18 is set on the side of the upper shell 12 away from the lower shell 14 and completely covers each light-transmitting groove 121. In this way, when the display cover 18 has a penetrating light signal to display the result, it can reduce the possibility of dust, droplets and other impurities from the outside to invade the internal components such as the movement board 30 and affect the working efficiency accordingly, and further increase the stability of the display unit 50 and the use of the formaldehyde detection device.

[0049] As a possible implementation, see Figure 1 The display cover 18 is formed with a plurality of display slots 181 , the number of the display slots 181 corresponds to the light-transmitting slots 121 , and the width of the display slots 181 is smaller than that of the light-transmitting slots 121 .

[0050] It can be understood that each display slot 181 is set to correspond to a light-transmitting slot 121, and the width of the display slot is smaller than the light-transmitting slot 121. In this way, during the operation of the formaldehyde detection device, the light signal emitted by the display unit 50 can be scattered or refracted so that at least part of the light signal can further pass through the display slot 181 while passing through the light-transmitting slot 121, and does not affect the final display effect of the display unit 50. At the same time, the possibility of external impurities such as dust and droplets invading internal components such as the movement board 30 and correspondingly affecting the working efficiency is further reduced, thereby further improving the use stability of the shell assembly 10 and the formaldehyde detection device.

[0051] As a feasible implementation, the display cover 18 is made of a light-transmitting material.

[0052] It is understandable that the light-transmitting material forming the display cover plate 18 can be formed of one or more materials such as transparent plastic, glass, organic glass, polyamide film, etc., and the present application does not make specific restrictions on this. Specifically, the display cover plate 18 is set to be a light-transmitting material, while not affecting the transmission of the display light signal, and no gap is generated to guide the light, so there is no possibility of external dust and droplets invading the interior of the housing assembly 10, further increasing the stability of the display unit 50 and the formaldehyde detection device.

[0053] As a feasible implementation, the display cover 18 is further provided with a switch button, and the upper shell 12 is correspondingly formed with an avoidance hole 125 so that the switch button can movably abut against the vibration unit 90 .

[0054] It is understandable that the vibration unit 90 is used to emit a slight vibration before the power supply component starts to supply power to the movement board 30 when the movement board 30 is connected to the power supply component to remind the user that the working process of the formaldehyde detection device has started, thereby increasing the user feedback effect and further improving the user experience of the formaldehyde detection device. Furthermore, a switch button is provided on the display cover 18, and a corresponding avoidance hole 125 is formed on the upper shell 12. In this way, the switch button is used to realize the control effect of the power supply component in the form of an on-off contact before the formaldehyde detection device starts working and before the work ends. At the same time, the vibration effect of the vibration unit 90 is generated in the process of the user pressing the button. The pressing action of the switch button and the vibration effect of the vibration unit 90 are generated almost simultaneously, further increasing the immediacy of the feedback effect obtained by the user, thereby increasing the user experience of the formaldehyde detection device.

[0055] As a possible implementation, see Figure 1 , Figure 3 and Figure 4 The lower shell 14 is provided with a mounting platform 141 protruding toward the upper shell 12 , and the movement plate 30 is fixedly connected to the mounting platform 141 .

[0056] It can be understood that the mounting platform 141 protruding from the lower shell 14 toward the upper shell 12 has a top surface of the mounting platform 141 that is not in the same plane as other inner wall surfaces for abutting and fixing the movement board 30, thereby avoiding interference of other parts that may be arranged on the inner wall surface of the lower shell 14 with the movement board 30, and increasing the thickness and spatial arrangement density of the shell assembly 10 in the direction from the lower shell 14 toward the upper shell 12, thereby further optimizing the space utilization of the formaldehyde detection device and reducing the inspection cost.

[0057] As a possible implementation, see Figure 1 , Figure 3 and Figure 4 A receiving groove 143 is formed on the side of the lower shell 14 facing away from the upper shell 12 corresponding to the mounting platform 141. The shell assembly 10 also includes a battery cover 19, which is detachably connected to the lower shell 14 and encloses the receiving groove 143 to form a battery cavity 191. The power supply assembly 70 is disposed in the battery cavity 191.

[0058] It can be understood that the correspondingly arranged accommodating grooves 143 and battery chambers 191 provide independent spaces for the power supply assembly 70 and electronic devices such as the movement board 30. In this way, when using a portable, detachable and replaceable power supply assembly 70 such as a lithium battery, the power supply assembly 70 can be directly removed from the battery chamber 191 and replaced after the power is exhausted without affecting other components in the detection chamber 15, thereby improving the flexibility of use and the convenience of maintenance of the formaldehyde detection device.

[0059] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A formaldehyde detection device, characterized in that: include: A shell component, wherein the shell component is formed with an air inlet, an air outlet and a detection cavity, and the air inlet and the air outlet are correspondingly connected to the detection cavity to form a detection air duct; A core board, which is arranged in the detection air duct and fixedly connected to the inner wall of the detection cavity to obtain the formaldehyde concentration; A plurality of display units, the display units are arranged in the detection cavity and electrically connected to the core board, and the plurality of display units are arranged at intervals along the extension direction of the core board to display the test results according to the formaldehyde concentration; A power supply component, which is disposed on the housing component and electrically connected to the movement board to provide energy for the movement board and the display unit; as well as A vibration unit is disposed in the detection cavity and electrically connected to the movement board so as to send out a vibration signal when the power supply component starts to work.

2. The formaldehyde detection device according to claim 1, characterized in that: The shell assembly includes an upper shell and a lower shell, and the upper shell and the lower shell are detachably connected to enclose the detection cavity. The air inlet and the air outlet are arranged on the upper shell, and the movement board and the power supply assembly are arranged on the lower shell.

3. The formaldehyde detection device according to claim 2, characterized in that: The upper shell is provided with a plurality of light-transmitting slots, the number of which corresponds to the display units. The display units are arranged on the movement board and toward the light-transmitting slots, so that each display unit is at least partially exposed in one of the light-transmitting slots.

4. The formaldehyde detection device according to claim 3, characterized in that: The upper shell is formed with a mounting groove, and the shell assembly further includes a display plug-in board. The light-transmitting groove is arranged on the display plug-in board, and the display plug-in board is inserted into the mounting groove.

5. The formaldehyde detection device according to claim 3, characterized in that: The housing assembly further comprises a display cover plate, which is arranged on a side of the upper housing away from the lower housing and completely covers each of the light-transmitting grooves.

6. The formaldehyde detection device according to claim 5, characterized in that: The display cover is formed with a plurality of display slots, the number of the display slots corresponds to the light-transmitting slots, and the width of the display slots is smaller than that of the light-transmitting slots.

7. The formaldehyde detection device according to claim 5, characterized in that: The display cover is made of light-transmitting material.

8. The formaldehyde detection device according to claim 5, characterized in that: The display cover is also provided with a switch button, and the upper shell is correspondingly formed with an avoidance hole so that the switch button can movably abut against the vibration unit.

9. The formaldehyde detection device according to any one of claims 2 to 8, characterized in that: The lower shell is provided with a mounting platform protruding toward the upper shell, and the movement plate is fixedly connected to the mounting platform.

10. The formaldehyde detection device according to claim 9, characterized in that: A receiving groove is formed on a side of the lower shell facing away from the upper shell corresponding to the mounting platform. The shell assembly also includes a battery cover, which is detachably connected to the lower shell and enclosed with the receiving groove to form a battery cavity. The power supply assembly is arranged in the battery cavity.

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