Doorbell device

Abstract

The utility model discloses a doorbell device comprising a housing, the housing is provided with an installation cavity and a sealing cover shell, and the sealing cover shell seals the installation cavity; the mounting cavity is provided with a loudspeaker and a light source, the sealing cover shell is provided with a sound guide area and a light guide area, and the light guide area is arranged on the periphery of the sound guide area; the sound guide area is arranged corresponding to the loudspeaker and guides sound to be guided out; the light guide area is used for guiding out light of the light source. According to the doorbell device, the sound guide area and the light guide area on the sealing cover shell can be partitioned, meanwhile, the mounting positions of the loudspeaker and the light source in the mounting cavity are partitioned, so that sound generated by the loudspeaker can be transmitted out more intensively through the sound guide area, meanwhile, the light guide area is not interfered by the position of the loudspeaker, and the sound guide effect is better. The light can be independently and uniformly distributed on the periphery of the sound guide area.

Description

TECHNICAL FIELD

[0001] The utility model relates to doorbell technical field especially relates to a doorbell device. BACKGROUND

[0002] At present, the main function of doorbell is to send sound to inform the owner that the visitor arrives. The doorbell is usually composed of doorbell transmitter and doorbell receiver, the doorbell transmitter is placed at the door, when the user presses the button on the doorbell transmitter, the doorbell receiver installed in the room receives the ring signal sent by the doorbell transmitter, and then sends the corresponding ring sound.

[0003] However, the traditional doorbell device does not have reasonable planning for the installation position of the lamp bead and the loudspeaker and the output area of the light and sound, which leads to the fact that the light of the doorbell device is blocked by the loudspeaker when the light is exported, or the lamp bead is affected when the loudspeaker vibrates, and there are problems such as unreasonable light distribution, poor light and sound propagation effect, thereby affecting the prompt effect. UTILITY MODEL CONTENT

[0004] In order to overcome at least one of the defects of the prior art described above, the utility model provides a doorbell device, which partitions the sound guide area and the light guide area on the cover shell, and the loudspeaker is arranged corresponding to the sound guide area, which avoids the light being blocked by the loudspeaker during propagation, and also avoids the stability of the light source being affected when the loudspeaker vibrates.

[0005] The utility model adopts the technical scheme that:

[0006] A doorbell device, comprising a shell, the shell is provided with a mounting cavity and a cover shell, the cover shell covers the mounting cavity; the mounting cavity is provided with a loudspeaker and a light source, the cover shell is provided with a sound guide area and a light guide area, the light guide area is arranged at the outer periphery of the sound guide area; the sound guide area is arranged corresponding to the loudspeaker and guides the sound to export; the light guide area is used for guiding the light of the light source to export.

[0007] Further, the sound guide area is provided with an annular enclosing wall towards the mounting cavity, the annular enclosing wall encloses an installation groove, the groove wall of the installation groove is provided with a loudspeaker hole; the loudspeaker is installed in the installation groove, and the loudspeaker hole is used for guiding the sound of the loudspeaker to export through the sound guide area.

[0008] Further, the inner side of the annular enclosing wall is provided with a supporting block, the annular enclosing wall is supported on the outer periphery of the loudspeaker, and the supporting block is supported on the sound emitting side of the loudspeaker.

[0009] Further, the mounting cavity is provided with a circuit board, and the loudspeaker and the light source are electrically connected with the circuit board.

[0010] Further, the shell comprises a base and an upper shell, the base and the upper shell are buckled to form the mounting cavity; the upper shell comprises the cover shell and a side shell surrounding the periphery of the cover shell, the bottom end of the side shell is detachably connected with the base.

[0011] Further, the circuit board is arranged on the base; the bottom of the base is further provided with a power taking pin, the power taking pin penetrates through the base and is electrically connected with the circuit board.

[0012] Further, the doorbell device comprises a protective shell, the protective shell covers the outer side of the upper shell; the protective shell has a protective surface, the protective surface is arranged correspondingly with the cover shell, the protective surface is provided with a communication hole, the communication hole falls within the sound guide area and the light guide area in the orthographic projection of the cover shell.

[0013] Further, the periphery of the protective surface is continuously provided with a blind hole, the blind hole surrounds the periphery of the communication hole; the blind hole falls on the periphery of the light guide area in the orthographic projection of the cover shell.

[0014] Further, the inner side periphery of the protective surface of the protective shell is provided with a reinforcing piece, the reinforcing piece covers the bottom of the outermost communication hole, so that the outermost communication hole is formed into the blind hole.

[0015] Further, the inner side of the bottom end of the protective shell is provided with a first connecting part, the outer side of the bottom end of the upper shell is provided with a second connecting part, the first connecting part and the second connecting part are detachably connected.

[0016] In summary, the doorbell device has the following technical effects:

[0017] The doorbell device divides the sound guide area and the light guide area on the cover shell, and divides the installation positions of the loudspeaker and the light source in the mounting cavity, so that the sound generated by the loudspeaker can be more concentratedly propagated through the sound guide area, meanwhile, the light guide area is not disturbed by the position of the loudspeaker, and can independently and uniformly distribute light around the periphery of the sound guide area. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an overall structure schematic view of the doorbell device of the embodiment of the utility model;

[0019] Figure 2 It is a cross-sectional structure schematic view of the doorbell device of the embodiment of the utility model;

[0020] Figure 3 It is an explosion view of the doorbell device of the embodiment of the utility model;

[0021] Figure 4 Figure 2 is a schematic view of the inner side structure of the protective shell according to an embodiment of the present application;

[0022] Figure 5 Figure 3 is a schematic view of the structure of the doorbell device after hiding the protective shell according to an embodiment of the present application;

[0023] Figure 6 Figure 4 is a schematic view of the inner side structure of the upper shell according to an embodiment of the present application.

[0024] In the drawings, the reference signs have the following meanings:

[0025] 10, shell; 11, base; 111, concave table; 112, mounting seat; 12, upper shell; 121, second connecting part; 13, mounting cavity; 14, mounting groove; 15, loudspeaker hole; 16, sound guide area; 17, light guide area; 18, annular enclosing wall; 19, supporting block; 20, loudspeaker; 30, light source; 40, circuit board; 41, power supply pin; 42, button; 50, protective shell; 51, communication hole; 52, blind hole; 53, first connecting part; 54, reinforcing part. DETAILED DESCRIPTION

[0026] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0027] In the description of the present application, it should be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0029] Referring to Figure 5 The present application discloses a doorbell device, which can be a doorbell receiver. The doorbell device comprises a shell 10, referring to Figure 2, the shell 10 is provided with a mounting cavity 13 and a cover shell, and the cover shell covers the mounting cavity 13. Specifically, the mounting cavity 13 is provided with a loudspeaker 20 and a light source 30, the cover shell is provided with a sound guide area 16 and a light guide area 17, and the light guide area 17 is arranged at the outer periphery of the sound guide area 16. Among them, the sound guide area 16 is arranged corresponding to the loudspeaker 20 and guides the sound to be exported; the light guide area 17 is used to guide the light of the light source 30 to be exported.

[0030] On the basis of this structure, when the doorbell device of the utility model is used, the loudspeaker 20 is first installed at the center position in the mounting cavity 13 during assembly, and then the light source 30, specifically the light source 30 can be a lamp bead, is installed at the corner of the mounting cavity 13; then the cover shell covers the mounting cavity 13, at this time, the sound guide area 16 on the cover shell corresponds to the loudspeaker 20.

[0031] When a visitor presses the doorbell button 42, the doorbell device receives the signal, and the loudspeaker 20 in the mounting cavity 13 starts to work, the loudspeaker 20 vibrates to generate a sound signal, and the sound is transmitted outward through the sound guide area 16 arranged corresponding on the cover shell, so that the people in the house can hear the doorbell sound. At the same time, the light emitted by the light source 30 in the mounting cavity 13 is guided outward through the light guide area 17 of the cover shell.

[0032] Therefore, the sound guide area 16 can guide the sound emitted by the loudspeaker 20, so that the sound is concentratedly transmitted in a specific direction. When the doorbell rings, the light will be turned on, the light guide area 17 guides the light of the light source 30 to be exported, and plays an obvious visual indication role.

[0033] In this way, by directing the sound propagation, the efficiency and clarity of sound propagation are effectively improved, and it is ensured that the people in the house can clearly hear the doorbell sound, even in a room far away from the doorbell device or in a noisy environment. In some noisy environment, people may have difficulty hearing the doorbell sound, but they can easily notice the flickering light, so as to know that there is a visitor. For the hearing impaired, light indication provides an important doorbell prompting method.

[0034] Among them, by partitioning the sound guide area 16 and the light guide area 17 on the cover shell, and corresponding the loudspeaker 20 with the sound guide area 16, the lamp bead is arranged at the corner of the mounting cavity 13, that is, the installation positions of the loudspeaker 20 and the lamp bead are also divided, so that when the loudspeaker 20 vibrates, the vibration will not affect the stability of the lamp bead. At the same time, the light will not be disturbed by the structure of the loudspeaker 20, and the light guide area 17 can better play its function of guiding light, and can independently and uniformly distribute the light at the outer periphery of the sound guide area 16.

[0035] Further, referring to Figure 2 and Figure 4The sound guide area 16 is provided with an annular wall 18 protruding towards the installation cavity 13, and the annular wall 18 surrounds the installation slot 14. The slot wall of the installation slot 14 is provided with a loudspeaker hole 15; the loudspeaker 20 is installed in the installation slot 14, and the loudspeaker hole 15 is used to guide the sound of the loudspeaker 20 to be conducted out through the sound guide area 16.

[0036] On the basis of the structure, when the loudspeaker 20 produces sound, the sound first conducts a preliminary propagation in the installation slot 14. Since the slot wall of the installation slot 14 is provided with the loudspeaker hole 15, the sound wave will be propagated outward from the sound guide area 16 through the loudspeaker hole 15, clearly delivering the sound of the doorbell to the external environment, so that the user can hear the sound of the doorbell.

[0037] The installation slot 14 surrounded by the annular wall 18 can concentrate the sound produced by the loudspeaker 20, and isolate the front and rear sounds of the loudspeaker 20 from each other. It should be noted that when the loudspeaker 20 works, the front and rear vibrations of the diaphragm respectively produce front and rear sounds. Under normal circumstances, if the front and rear sounds are not isolated, they will interfere with each other and disperse the sound energy, affecting the effect of sound propagation outward.

[0038] The installation slot 14 surrounded by the annular wall 18 forms a physical barrier, which structurally blocks the direct interaction of the front and rear sounds of the loudspeaker 20. For the sound propagated to the installation slot 14 from the front, it is limited in the space of the installation slot 14 and conducted to the sound guide area 16 through the loudspeaker hole 15; and for the sound produced from the rear, it is difficult to enter the installation slot 14 to mix with the front sound due to the blockage of the annular wall 18, thus effectively realizing the isolation of the front and rear sounds.

[0039] Therefore, the installation slot 14 surrounded by the annular wall 18 makes the finally transmitted sound of the doorbell clearer and cleaner, without the problems of sound quality blur and sound direction confusion caused by the mixing of front and rear sounds, and more accurately delivers the prompt sound of the doorbell to the indoor or outdoor places where people need to hear the doorbell.

[0040] Further, the inner side of the annular wall 18 is provided with a support block 19; wherein the annular wall 18 is supported on the outer periphery of the loudspeaker 20, and the support block 19 is supported on the sound producing side of the loudspeaker 20.

[0041] Specifically, the annular wall 18 is supported on the outer periphery of the loudspeaker 20, which can prevent the loudspeaker 20 from being displaced in the installation slot 14, keep the position of the loudspeaker 20 stable, and ensure its normal work. The support block 19 is located on the inner side of the annular wall 18 and supported on the sound producing side of the loudspeaker 20, which together with the annular wall 18 forms a multi-point support system for the loudspeaker 20, making the position of the loudspeaker 20 in the installation slot 14 more stable.

[0042] Therefore, through the annular surrounding wall 18 and the supporting block 19, the speaker 20 can be prevented from sinking or tilting and other unstable conditions due to its own vibration during sound production, so as to ensure that the sound can be transmitted out through the speaker hole 15 at a correct angle and direction.

[0043] Further, referring to Figure 2 and Figure 3 , the circuit board 40 is arranged in the mounting cavity 13, and the speaker 20 and the light source 30 are electrically connected with the circuit board 40.

[0044] On this basis, when a visitor presses the button 42 of the doorbell transmitter, the doorbell transmitter will emit a trigger signal. At this time, the doorbell device located indoors receives the trigger signal and transmits the signal to the circuit board 40 through the line. After receiving the signal, the circuit board 40 drives the diaphragm of the speaker 20 to vibrate, thereby generating sound. At the same time, the circuit board 40 makes the light source 30 emit light, and the light is emitted outward through the light guide area 17.

[0045] Therefore, the circuit board 40 integrates the control function, ensuring that the speaker 20 and the light source 30 can work cooperatively.

[0046] Further, referring to Figure 3 and Figure 5 , the shell 10 includes the base 11 and the upper shell 12, and the base 11 and the upper shell 12 are buckled to form the mounting cavity 13. The upper shell 12 includes the cover shell and the side shell surrounding the outer periphery of the cover shell, and the bottom end of the side shell is detachably connected with the base 11.

[0047] On this basis, during assembly, the circuit board 40 is first placed on the base 11 at a proper position, and then the speaker 20 and the light source 30 are installed at corresponding positions of the base 11 or the upper shell 12 through corresponding mounting structures and are electrically connected with the circuit board 40, so as to ensure that the components are stably connected and the line connection is accurate and correct.

[0048] Then, the bottom end of the side shell of the upper shell 12 is aligned with the corresponding connecting part of the base 11. Specifically, the detachable connection can be achieved by means of buckling, slot cooperation or screws, and the bottom end of the side shell is buckled or screwed with the base 11 along the edge of the base 11, so that the upper shell 12 is gradually attached to the base 11 until completely buckled, so that the two form the mounting cavity 13.

[0049] Therefore, by dividing the shell 10 into two parts of the base 11 and the upper shell 12, the modular assembly operation on the production line is facilitated. Workers can first concentrate on installing key components such as the circuit board 40, the loudspeaker 20, and the light source 30 on the base 11 or the upper shell 12, and then assemble the two, which is clear in division of labor, can improve production efficiency, reduce assembly difficulty, and better ensure the accuracy and stability of the installation of each component.

[0050] In addition, the detachable connection of the side shell bottom end and the base 11 makes it extremely convenient to operate when maintenance, repair, or replacement of components inside the doorbell is required.

[0051] It should be noted that the upper shell 12 is made of glass, transparent plastic, or other materials, which allows the upper shell 12, especially the light guide area 17, to guide light.

[0052] Further, the circuit board 40 is arranged on the base 11, and the bottom of the base 11 is further provided with a power taking pin 41, wherein the power taking pin 41 penetrates the base 11 and is electrically connected with the circuit board 40.

[0053] On this basis, the base 11 is recessed with a recess 111, and the recess 111 is provided with a mounting seat 112, one end of the power taking pin 41 penetrates the mounting seat 112 from the bottom of the base 11 and is connected with the circuit board 40 above the recess 111.

[0054] In use of the doorbell device, the power taking pin 41 can be connected with an external power source. The external power source can be a household power line or other suitable direct current power source (such as a battery pack, etc.). The power taking pin 41 is usually made of metal, which can be inserted into a power socket or tightly connected with a power interface.

[0055] When the power taking pin 41 is successfully connected with the external power source, the current is transmitted to the circuit board 40 through the power taking pin 41 to provide power support for various electronic elements (such as control chips, loudspeaker 20 driving circuit, light source 30 driving circuit, etc.) on the circuit board 40.

[0056] The mounting seat 112 ensures that the position of the power taking pin 41 is correct, and the power taking pin 41 is not easily displaced during plugging with the external power source, avoiding the position deviation of the power taking pin 41 and the circuit board 40 to pull the circuit board 40.

[0057] In addition, the power taking pin 41 penetrating the base 11 achieves electrical isolation to a certain extent. The base 11 is usually made of insulating materials such as plastic, which can prevent the external power source from directly contacting other components (except the circuit board 40) inside the doorbell, avoiding accidental electric shock to users, and reducing the risk of circuit short circuit.

[0058] Further, referring to Figure 1 and Figure 3 The doorbell device comprises a protective shell 50, specifically, the protective shell 50 covers the outer side of the upper shell 12, and the protective shell 50 has a protective surface corresponding to the cover shell. The protective surface is provided with a communication hole 51, and the communication hole 51 is in the orthographic projection of the cover shell within the sound guide area 16 and the light guide area 17.

[0059] On this basis, after the doorbell device is assembled, the protective shell 50 is covered on the outer side of the upper shell 12, so that the protective surface of the protective shell 50 corresponds to the cover shell. During installation, it is necessary to ensure that the position of the communication hole 51 of the protective surface is accurate, so that the orthographic projection of the cover shell can fall within the sound guide area 16 and the light guide area 17, so as to ensure that the sound and light can smoothly propagate through the communication hole 51.

[0060] The sound emitted by the loudspeaker 20 passes through the sound guide area 16 of the cover shell, and then propagates to the external environment through the communication hole 51 of the protective surface. At the same time, the light emitted by the light source 30 transmits through the light guide area 17 of the cover shell, and then transmits from the communication hole 51 of the protective surface.

[0061] Therefore, the protective shell 50 can provide physical protection for the doorbell device to prevent external hard objects from directly colliding and scratching the upper shell 12, especially protecting the sound guide area 16 and the light guide area 17 on the cover shell. The communication hole 51 is in the orthographic projection of the cover shell within the sound guide area 16 and the light guide area 17, so that the sound and light can be concentrated through these communication holes 51. This concentrated propagation mode helps to enhance the intensity of the sound and light in a specific direction.

[0062] Further, referring to Figure 2 The periphery of the protective surface is continuously provided with a blind hole 52, and the blind hole 52 is arranged around the outer periphery of the communication hole 51. The blind hole 52 is in the orthographic projection of the cover shell within the periphery of the light guide area 17.

[0063] On this basis, when the light source 30 in the doorbell device is triggered to light up, the light begins to propagate from the inside to the outside, and transmits through the light guide area 17 of the cover shell to the outside. The blind hole 52 arranged on the periphery of the protective surface is in the orthographic projection of the cover shell within the periphery of the light guide area 17. Since the blind hole 52 is a concave structure and is not permeable, when the light propagates to the position of the blind hole 52, the light propagating in the direction of the blind hole 52 cannot continue to penetrate, and is blocked by the wall surface of the blind hole 52.

[0064] In this way, part of the light is blocked by the blind hole 52, and a clear light and shadow contrast effect is generated at the edge of the light guide area 17. The area originally uniformly emitting light outward of the light guide area 17 and the position of the blind hole 52 form a difference between light and dark, so that the light at the center position of the light guide area 17 is relatively stronger, and can attract more direct attention of people.

[0065] Further, referring to Figure 2 and Figure 4 , the inner side periphery of the protective shell 50 opposite the protective surface is provided with reinforcing members 54, and the reinforcing members 54 cover the bottoms of the outermost peripheral communication holes 51, so that the outermost peripheral communication holes 51 are formed into the blind holes 52.

[0066] Specifically, the reinforcing members 54 can be plastic reinforcing ribs, which can be integrally formed with the protective shell 50. Among them, the protective shell 50 is a component that serves as a cover outside the upper shell 12 and plays a protective role, and needs to have sufficient structural strength to cope with possible external force impact, extrusion and other situations. The reinforcing members 54 are arranged at the inner side periphery of the protective shell 50, which can reinforce the overall structure of the protective shell 50, like adding a "skeleton" to the edge of the protective shell 50.

[0067] In addition, the positions of the outermost peripheral communication holes 51 are relatively weak, because the existence of the holes will break the material continuity of this area, and the structural strength will be reduced. The reinforcing members 54 cover the bottoms of these communication holes 51, so that the structure around the communication holes 51 and the overall structure of the protective shell 50 are strengthened.

[0068] Further, referring to Figure 5 and Figure 6 , the inner side of the bottom end of the protective shell 50 is provided with a first connecting part 53, and the outer side of the bottom end of the upper shell 12 is provided with a second connecting part 121, and the first connecting part 53 and the second connecting part 121 are detachably connected.

[0069] On the basis of this structure, when assembling the doorbell device, through the cooperation of the first connecting part 53 and the second connecting part 121, the protective shell 50 can be conveniently installed to the outside of the upper shell 12. For example, the first connecting part 53 and the second connecting part 121 can be a snap-on structure, and when installing, only need to align the first connecting part 53 of the protective shell 50 with the second connecting part 121 of the upper shell 12, and then press or rotate the protective shell 50 slightly, so that the two are tightly connected together.

[0070] In addition, the first connecting part 53 and the second connecting part 121 can also be connecting holes, and the first connecting part 53 and the second connecting part 121 are connected by fasteners such as screws. This detachable connection makes the installation process simple and fast, without the need for complex tools or special skills, greatly improving the assembly efficiency.

[0071] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A doorbell device, characterized by: The application relates to a doorbell device, which comprises a shell provided with a mounting cavity and a cover shell covering the mounting cavity; the mounting cavity is provided with a loudspeaker and a light source; the cover shell is provided with a sound guide area and a light guide area, and the light guide area is arranged at the outer periphery of the sound guide area; the sound guide area is arranged corresponding to the loudspeaker and guides sound to be guided out; and the light guide area is used for guiding light of the light source to be guided out.

2. The doorbell device of claim 1, wherein: The peripheral edge of the sound guide area is provided with an annular surrounding wall protruding towards the mounting cavity, the annular surrounding wall surrounds a mounting groove, and the groove wall of the mounting groove is provided with a loudspeaker hole; the loudspeaker is mounted in the mounting groove, and the loudspeaker hole is used for guiding sound of the loudspeaker to be guided out through the sound guide area.

3. The doorbell device of claim 2, wherein: The inner side of the annular surrounding wall is provided with a supporting block, the annular surrounding wall is supported on the outer periphery of the loudspeaker, and the supporting block is supported on the sound generating side of the loudspeaker.

4. The doorbell device of claim 1, wherein: The mounting cavity is provided with a circuit board, and the loudspeaker and the light source are electrically connected with the circuit board.

5. The doorbell device of claim 4, wherein: The shell comprises a base and an upper shell, the base and the upper shell are buckled to form the mounting cavity; the upper shell comprises the cover shell and a side shell surrounding the outer periphery of the cover shell, and the bottom end of the side shell is detachably connected with the base.

6. The doorbell device of claim 5, wherein: The circuit board is arranged on the base; the bottom of the base is further provided with a power taking pin, the power taking pin penetrates through the base and is electrically connected with the circuit board.

7. The doorbell device of claim 5, wherein: The doorbell device comprises a protective shell, the protective shell is arranged on the outer side of the upper shell; the protective shell has a protective surface, the protective surface is arranged corresponding to the cover shell, the protective surface is provided with a communication hole, and the communication hole is located in the sound guide area and the light guide area in the orthographic projection of the cover shell.

8. The doorbell device of claim 7, wherein: The peripheral edge of the protective surface is continuously provided with a blind hole, the blind hole surrounds the outer periphery of the communication hole; and the blind hole is located at the peripheral edge of the light guide area in the orthographic projection of the cover shell.

9. The doorbell device of claim 8, wherein: The inner side of the peripheral edge of the protective surface is continuously provided with a blind hole, the blind hole surrounds the outer periphery of the communication hole; and the blind hole is located at the peripheral edge of the light guide area in the orthographic projection of the cover shell.

10. The doorbell device of claim 7, wherein: The inner side of the bottom end of the protective shell is provided with a first connecting part, the outer side of the bottom end of the upper shell is provided with a second connecting part, and the first connecting part and the second connecting part are detachably connected.

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