Fluorescent lamp splicing device

Abstract

The utility model discloses a fluorescent lamp splicing device which comprises a first end cover, a second end cover and an inserting structure. The first end cover is provided with a first insertion part and a first conductor hole for mounting a conductor; the second end cover is provided with a second conductor hole used for installing a conductor. The plug-in structure is arranged on the second end cover, the plug-in structure is provided with a third conductor hole used for installing a conductor, the third conductor hole can be communicated with the second conductor hole, and one end of the plug-in structure can be matched with the first plug-in part in a plug-in mode and enables the first conductor hole to be communicated with the second conductor hole; wherein the first end cover is provided with a first locking part, the plug-in structure is provided with a first matching part, and when one end of the plug-in structure is matched with the first plug-in part in a plug-in mode, the first locking part can be matched with the first matching part and lock the position of the plug-in structure relative to the first end cover. And the first locking part can be separated from the first matching part and unlock the position of the insertion structure relative to the first end cover.

Description

Technical Field

[0001] The utility model relates to a fluorescent lamp, in particular to a splicing device for fluorescent lamp fixtures. Background Art

[0002] For some existing fluorescent lamp fixtures, both ends of the strip-shaped lamp holder are provided with end caps, and a lamp tube is installed on the lamp holder. In order to be spliced along the length direction to form a continuous lighting effect, the end caps of two adjacent fluorescent lamp fixtures can be inserted and matched, and the end caps are provided with conductors. When the two end caps are inserted and matched, the conductors on the two end caps are butted, so that a plurality of fluorescent lamp fixtures can be powered simultaneously without external wiring. At present, for such fluorescent lamp fixtures, if the end caps are vibrated after splicing, the end caps are likely to become loose, and the use is not stable enough. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a splicing device for fluorescent lamp fixtures, which is not easy to become loose during splicing and improves the use stability.

[0004] According to an embodiment of the utility model, the splicing device for fluorescent lamp fixtures includes a first end cap, a second end cap and a plugging structure. The first end cap is provided with a first plugging part, and the first end cap is provided with a first conductor hole for installing a conductor; the second end cap is provided with a second conductor hole for installing a conductor; the plugging structure is arranged on the second end cap, the plugging structure is provided with a third conductor hole for installing a conductor, the third conductor hole can communicate with the second conductor hole, and one end of the plugging structure can be inserted and matched with the first plugging part to make the first conductor hole communicate with the second conductor hole; wherein the first end cap is provided with a first locking part, the plugging structure is provided with a first matching part, when one end of the plugging structure is inserted and matched with the first plugging part, the first locking part can cooperate with the first matching part to lock the position of the plugging structure relative to the first end cap, and the first locking part can be separated from the first matching part to unlock the position of the plugging structure relative to the first end cap.

[0005] According to an embodiment of the utility model, the splicing device for fluorescent lamp fixtures has at least the following beneficial effects: when the first end cap and the second end cap are spliced by inserting and matching, the conductors installed in the first conductor hole, the second conductor hole and the third conductor hole are conducted, and the position of the plugging structure relative to the first end cap is locked and limited by the first locking part and the first matching part, so that the first end cap and the second end cap are not easy to become loose when spliced by the plugging structure, and the use stability is improved; when it is necessary to disassemble the first end cap and the plugging structure, the first locking part and the first matching part can be separated to disassemble the first end cap and the plugging structure.

[0006] According to an embodiment of the present utility model, the plugging structure and the second end cover are of an integrally formed structure, and the second conductor hole and the third conductor hole are coaxially arranged.

[0007] According to an embodiment of the present utility model, the first plugging portion is a first plugging hole, one end of the plugging structure is adapted to the first plugging hole, the first locking portion is a first catch, and the first matching portion is a first slot.

[0008] According to an embodiment of the present utility model, the first end cover is provided with a first elastic arm, the first elastic arm extends along the axial direction of the first plugging hole, one side of the first elastic arm is located on the side wall of the first plugging hole, the first catch is connected to the side of the first elastic arm close to the first plugging hole, the first slot is located outside the plugging structure, and the first elastic arm can elastically deform to enable the first catch to enter or disengage from the first slot.

[0009] According to an embodiment of the present utility model, the other side of the first elastic arm is located on the outer wall of the first end cover.

[0010] According to an embodiment of the present utility model, the first end cover is provided with a first guiding strip, the first guiding strip extends along the axial direction of the first plugging hole, the plugging structure is provided with a guiding groove, and the first guiding strip is adapted to the guiding groove.

[0011] According to an embodiment of the present utility model, the second end cover is provided with a second plugging portion, the other end of the plugging structure can be plugged and matched with the second plugging portion, the second end cover is provided with a second locking portion, the plugging structure is provided with a second matching portion, when the other end of the plugging structure is plugged and matched with the second matching portion, the second conductor hole and the third conductor hole are communicated, and the second locking portion can cooperate with the second matching portion to lock the position of the plugging structure relative to the second end cover; and the second locking portion can be separated from the second matching portion to unlock the position of the plugging structure relative to the second end cover.

[0012] According to an embodiment of the present utility model, the second plugging portion is a second plugging hole, the other end of the plugging structure is adapted to the second plugging hole, the second locking portion is a second catch, and the second matching portion is a second slot.

[0013] According to an embodiment of the present invention, the plugging structure includes a flexible wire, a first plugging block, and a second plugging block. The two ends of the flexible wire are respectively connected to the first plugging block and the second plugging block. The first plugging block and the second plugging block are both provided with the third conductor holes. The first plugging block is adapted to the first plugging portion, the second plugging block is adapted to the second plugging portion, the first matching portion is arranged on the first plugging block, and the second matching portion is arranged on the second plugging block.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0016] Figure 1 is a three-dimensional schematic diagram when the daylight lamp splicing device of the first embodiment of the present invention is spliced;

[0017] Figure 2 is a cross-sectional schematic diagram of the daylight lamp splicing device of the first embodiment of the present invention when spliced along the Figure 1 X-X direction;

[0018] Figure 3 is an exploded schematic diagram of the daylight lamp splicing device of the first embodiment A of the present invention;

[0019] Figure 4 is an exploded schematic diagram of the daylight lamp splicing device of the first embodiment B of the present invention;

[0020] Figure 5 is a schematic diagram of the plugging structure of the third embodiment of the present invention.

[0021] REFERENCE SIGNS:

[0022] First end cap 100, first plugging portion 110, first conductor hole 120, first locking portion 130, first elastic arm 140, first guiding strip 150;

[0023] Second end cap 200, second conductor hole 210, second plugging portion 220, second locking portion 230, second elastic arm 240;

[0024] Plugging structure 300, third conductor hole 310, first matching portion 320, guiding groove 330, second matching portion 340, flexible wire 350, first plugging block 360, second plugging block 370. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, it should be understood that with regard to the orientation description, such as up, down, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0027] In the description of the present utility model, "a plurality of" refers to more than two. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0028] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense. Those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0029] Referring to Figures 1 to 5 , for the daylight lamp splicing device of the embodiment of the present utility model, it includes a first end cap 100, a second end cap 200 and a plug-in structure 300. The first end cap 100 is provided with a first plug-in portion 110, and the first end cap 100 is provided with a first conductor hole 120 for installing a conductor; the second end cap 200 is provided with a second conductor hole 210 for installing a conductor; the plug-in structure 300 is arranged on the second end cap 200, and the plug-in structure 300 is provided with a third conductor hole 310 for installing a conductor. The third conductor hole 310 can communicate with the second conductor hole 210, and one end of the plug-in structure 300 can be plugged and matched with the first plug-in portion 110 to make the first conductor hole 120 and the second conductor hole 210 communicate; wherein the first end cap 100 is provided with a first locking portion 130, and the plug-in structure 300 is provided with a first matching portion 320. When one end of the plug-in structure 300 is plugged and matched with the first plug-in portion 110, the first locking portion 130 can cooperate with the first matching portion 320 to lock the position of the plug-in structure 300 relative to the first end cap 100, and the first locking portion 130 can be separated from the first matching portion 320 to unlock the position of the plug-in structure 300 relative to the first end cap 100.

[0030] When the first end cover 100 and the second end cover 200 are spliced through plug-in fit, the conductors installed in the first conductor hole 120, the second conductor hole 210 and the third conductor hole 310 are electrically connected. The position of the plug-in structure 300 relative to the first end cover 100 is locked and limited by the first locking portion 130 and the first matching portion 320, so that when the first end cover 100 and the second end cover 200 are spliced through the plug-in structure 300, they are not easily loosened, improving the use stability; when it is necessary to disassemble the first end cover 100 and the plug-in structure 300, separating the first locking portion 130 from the first matching portion 320 can disassemble the first end cover 100 and the plug-in structure 300.

[0031] In the first embodiment, referring to Figure 3 and Figure 4 , the first end cover 100, the second end cover 200 and the plug-in structure 300 are produced separately and then assembled.

[0032] In the second embodiment, the plug-in structure 300 and the second end cover 200 are an integrally formed structure, and the second conductor hole 210 and the third conductor hole 310 are coaxially arranged. The plug-in structure 300 and the second end cover 200 are directly integrally formed, reducing the number of parts, simplifying the assembly process of the second end cover 200 and the plug-in structure 300, and improving the use experience.

[0033] In the first embodiment, referring to Figure 3 and Figure 4 , the first plug-in portion 110 is a first plug-in hole, one end of the plug-in structure 300 is adapted to the first plug-in hole, the first locking portion 130 is a first hook, and the first matching portion 320 is a first slot. When one end of the plug-in structure 300 is inserted into the first plug-in hole, the first hook is engaged with the first slot in a snap-fit manner, thereby realizing the position of the plug-in structure 300 relative to the first end cover 100 can be locked, and the locking structure is relatively simple and easy to implement. When it is necessary to disassemble the first end cover 100 and the plug-in structure 300, by separating the first hook from the first slot, the plug-in structure 300 can then be pulled out and separated from the first end cover 100.

[0034] It can be imagined that the first plug-in portion 110 can also be a plug-in block, and a first plug-in hole is provided at one end of the plug-in structure 300, which can also realize the plug-in fit between the two; the first locking portion 130 can also be a first slot, and the first matching portion 320 can also be a first hook; or the first locking portion 130 uses a spring pin, and the first matching portion 320 uses a pin hole. When the spring pin is inserted into the pin hole, the first end cover 100 and the plug-in structure 300 are locked; when the spring pin is pressed to disengage from the pin hole, the first end cover 100 and the plug-in structure 300 can be separated conveniently.

[0035] In the first embodiment, referring to Figure 1 and Figure 2The first end cover 100 is provided with a first elastic arm 140, which extends along the hole axis direction of the first plug-in hole, one side of the first elastic arm 140 is located on the side wall of the first plug-in hole, the first hook is connected to the side of the first elastic arm 140 close to the first plug-in hole, the first slot is located on the outside of the plug-in structure 300, and the first elastic arm 140 can be elastically deformed to allow the first hook to enter or escape from the first slot. When the plug-in structure 300 is inserted into the first plug-in hole, the first elastic arm 140 is elastically deformed and allows the first hook to avoid the plug-in structure 300, and then the first elastic arm 140 is reset and allows the first hook to be locked into the first slot. When the first hook is engaged with the first slot, the first hook can be relatively easily separated from the first slot by the deformation of the first elastic arm 140, so that the first hook has a better range of motion and is convenient for entering or escaping from the first slot.

[0036] In the first embodiment, referring to Figure 1 and Figure 2 , the other side of the first elastic arm 140 is located at the outer wall of the first end cover 100. When the first hook is engaged with the first slot, the user can directly move the first elastic arm 140 from the outside of the first end cover 100 to drive the first hook out of the first slot, so that the user can relatively easily drive the first hook out of the first slot, reducing the difficulty of disassembling the first end cover 100 and the plug-in structure 300.

[0037] Specifically, the first end cover 100 is made of plastic material, so that the first elastic arm 140 can have good elasticity. It is understandable that the first hook can also be slidably connected to the first end cover 100, and the first hook is driven by a spring to snap into the first slot.

[0038] In the first embodiment, referring to Figure 3 and Figure 4 The first end cover 100 is provided with a first guide bar 150, and the first guide bar 150 extends along the hole axis direction of the first plug hole. The plug structure 300 is provided with a guide groove 330, and the first guide bar 150 is adapted to the guide groove 330. The first guide bar 150 is provided, and when the plug structure 300 is inserted into the first plug hole, the first guide bar 150 can cooperate with the guide groove 330 to guide the sliding direction of the plug structure 300, so that the plugging process of the two is more stable and accurate, and the plugging strength of the two is improved.

[0039] In the first embodiment, referring to Figure 2, the second end cap 200 is provided with a second insertion portion 220, the other end of the insertion structure 300 can be inserted and matched with the second insertion portion 220, the second end cap 200 is provided with a second locking portion 230, and the insertion structure 300 is provided with a second matching portion 340. When the other end of the insertion structure 300 is inserted and matched with the second matching portion 340, the second conductor hole 210 is communicated with the third conductor hole 310. The second locking portion 230 can cooperate with the second matching portion 340 to lock the position of the insertion structure 300 relative to the second end cap 200, and the second locking portion 230 can be separated from the second matching portion 340 to unlock the position of the insertion structure 300 relative to the second end cap 200. The second end cap 200 and the insertion structure 300 are also assembled and spliced by an insertion method. The position of the insertion structure 300 relative to the second end cap 200 is locked and limited by the second locking portion 230 and the second matching portion 340, so that the second end cap 200 and the insertion structure 300 are not easily loosened when spliced, and the use stability is improved; when the second end cap 200 and the insertion structure 300 need to be disassembled, the second locking portion 230 can be separated from the second matching portion 340 for disassembly.

[0040] In the first embodiment, refer to Figure 2 , the second insertion portion 220 is a second insertion hole, the other end of the insertion structure 300 is adapted to the second insertion hole, the second locking portion 230 is a second hook, and the second matching portion 340 is a second slot. When the other end of the insertion structure 300 is inserted into the second insertion hole, the second hook is snap-fitted with the second slot, so as to lock the position of the insertion structure 300 relative to the second end cap 200. The locking structure is relatively simple and easy to implement. When the second end cap 200 and the insertion structure 300 need to be disassembled, by separating the second hook from the second slot, the insertion structure 300 can then be pulled out relative to the second end cap 200.

[0041] Specifically, in the first embodiment, the structure of the second end cap 200 is the same as that of the first end cap 100, that is, the two can use the same part, improving the versatility of the parts and reducing the types of parts. That is, the second end cap 200 also has a second elastic arm 240 and a second guide bar, which will not be elaborated here. It can be imagined that the second hook can also be slidably arranged on the second end cap 200, and the second hook is driven by a spring to be inserted into the second slot.

[0042] In the third embodiment, refer to Figure 5The plug-in structure 300 includes a flexible wire 350, a first plug-in block 360 and a second plug-in block 370. The two ends of the flexible wire 350 are respectively connected to the first plug-in block 360 and the second plug-in block 370. The first plug-in block 360 and the second plug-in block 370 are both provided with a third conductor hole 310. The first plug-in block 360 is adapted to the first plug-in portion 110, and the second plug-in block 370 is adapted to the second plug-in portion 220. The first matching portion 320 is provided on the first plug-in block 360, and the second matching portion 340 is provided on the second plug-in block 370.

[0043] Specifically, the first plug-in portion 110 of the first end cover 100 is a first plug-in hole, the second plug-in portion 220 of the second end cover 200 is a second plug-in hole, the first plug-in block 360 of the plug-in structure 300 can be plugged into the first plug-in hole, and the first plug-in block 360 is snap-connected with the first end cover 100; the second plug-in block 370 can be plugged into the second plug-in hole, and the second plug-in block 370 is snap-connected with the second end cover 200. Since there is a flexible wire 350 between the first plug-in block 360 and the second plug-in block 370, the two fluorescent lamps can be spliced ​​at different angles through the plug-in structure 300, so that the angle of splicing between the two fluorescent lamps through the plug-in structure 300 is more flexible, thereby improving the user experience.

[0044] It should be understood that when conductors are installed in the second conductor holes 210 of the first plug-in block 360 and the second plug-in block 370 , the two conductors are connected through the flexible wire 350 .

[0045] Specifically, the first end cover 100, the plug-in structure 300 and the second end cover 200 of the first embodiment are produced separately. When splicing, one end of the plug-in structure 300 is inserted into the first plug-in hole of the first end cover 100, and the first hook on the first end cover 100 is inserted into the first slot of the plug-in structure 300, so that the two are plugged and fixed, and the positions of the two are locked; the other end of the plug-in structure 300 is inserted into the second plug-in hole of the second end cover 200, and the second hook on the second end cover 200 is inserted into the second slot of the plug-in structure 300, so that the two are plugged and fixed, and the positions of the two are locked. When it is necessary to disassemble, the first elastic arm 140 is bent to make the first hook disengage from the first slot, and the second elastic arm 240 is bent to make the second hook disengage from the second slot, and then the first end cover 100, the plug-in structure 300 and the second end cover 200 can be disassembled.

[0046] Specifically, in the second embodiment, the plug-in structure 300 and the second end cover 200 are an integrally formed structure, that is, when splicing, one end of the plug-in structure 300 is directly inserted into the first end cover 100, and the first hook is engaged and locked with the first slot. When it is necessary to disassemble, the first hook is moved by the first elastic arm 140 to disengage the first hook from the first slot, and then the plug-in structure 300 and the first end cover 100 can be disassembled.

[0047] Specifically, in the third embodiment, during splicing, the first insertion block 360 is inserted and clamped with the first end cap 100, and the second insertion block 370 is inserted and clamped with the second end cap 200.

[0048] Specifically, two first conductor holes 120, two second conductor holes 210, and two third conductor holes 310 can be respectively provided, which is suitable for a power supply method without a ground wire. Refer to the first embodiment B of the appendix Figure 4 ; or three can be respectively provided, which is suitable for a power supply method with a ground wire. Refer to the first embodiment A of the appendix Figure 3 of the appendix.

[0049] The present utility model also discloses a daylight lamp, which includes a strip-shaped lamp base, the above-mentioned daylight lamp splicing device, and a lamp tube. The first end cap 100 is installed at one end of the strip-shaped lamp base, and the second end cap 200 is installed at the other end of the strip-shaped lamp base; the lamp tube is arranged on the lamp base, and both ends of the lamp tube are fixedly connected to the first end cap 100 and the second end cap 200 respectively.

[0050] Due to the adoption of the above-mentioned daylight lamp splicing device, the ends of different daylight lamps can be spliced, and it is not easy to loosen after splicing, and the use stability is better.

[0051] Specifically, both ends of the lamp tube are fixedly connected to the first end cap 100 and the second end cap 200 respectively, that is, the lamp base and the lamp tube are fixed into a whole, which is convenient for installation and use.

[0052] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A fluorescent lamp splicing device, characterized in that: include: A first end cover (100) is provided with a first plug-in portion (110), and the first end cover (100) is provided with a first conductor hole (120) for installing a conductor; A second end cover (200) is provided with a second conductor hole (210) for installing a conductor; A plug-in structure (300) is arranged on the second end cover (200), the plug-in structure (300) is provided with a third conductor hole (310) for installing a conductor, the third conductor hole (310) can be connected with the second conductor hole (210), and one end of the plug-in structure (300) can be plugged and matched with the first plug-in portion (110) to connect the first conductor hole (120) and the second conductor hole (210); The first end cover (100) is provided with a first locking portion (130), and the plug-in structure (300) is provided with a first matching portion (320). When the one end of the plug-in structure (300) is plugged and matched with the first plug-in portion (110), the first locking portion (130) can match with the first matching portion (320) and lock the position of the plug-in structure (300) relative to the first end cover (100), and the first locking portion (130) can separate from the first matching portion (320) and unlock the position of the plug-in structure (300) relative to the first end cover (100).

2. The fluorescent lamp splicing device according to claim 1, characterized in that: The plug-in structure (300) and the second end cover (200) are an integrally formed structure, and the second conductor hole (210) and the third conductor hole (310) are coaxially arranged.

3. The fluorescent lamp splicing device according to claim 1, characterized in that: The first plug-in portion (110) is a first plug-in hole, the one end of the plug-in structure (300) is adapted to the first plug-in hole, the first locking portion (130) is a first hook, and the first matching portion (320) is a first slot.

4. The fluorescent lamp splicing device according to claim 3, characterized in that: The first end cover (100) is provided with a first elastic arm (140), the first elastic arm (140) extends along the hole axis direction of the first plug-in hole, one side of the first elastic arm (140) is located on the side wall of the first plug-in hole, the first hook is connected to the side of the first elastic arm (140) close to the first plug-in hole, the first slot is located on the outside of the plug-in structure (300), and the first elastic arm (140) can be elastically deformed and enable the first hook to enter or leave the first slot.

5. The fluorescent lamp splicing device according to claim 4, characterized in that: The other side of the first elastic arm (140) is located on the outer wall of the first end cover (100).

6. The fluorescent lamp splicing device according to claim 3, characterized in that: The first end cover (100) is provided with a first guide bar (150), the first guide bar (150) extends along the hole axis direction of the first plug hole, and the plug structure (300) is provided with a guide groove (330), the first guide bar (150) is adapted to the guide groove (330).

7. The fluorescent lamp splicing device according to claim 1, characterized in that: The second end cover (200) is provided with a second plug-in portion (220), and the other end of the plug-in structure (300) can be plugged and matched with the second plug-in portion (220). The second end cover (200) is provided with a second locking portion (230), and the plug-in structure (300) is provided with a second matching portion (340). When the other end of the plug-in structure (300) is plugged and matched with the second matching portion (340), the second conductor hole (210) is connected with the third conductor hole (310), and the second locking portion (230) can cooperate with the second matching portion (340) and lock the position of the plug-in structure (300) relative to the second end cover (200); and the second locking portion (230) can be separated from the second matching portion (340) and unlock the position of the plug-in structure (300) relative to the second end cover (200).

8. The fluorescent lamp splicing device according to claim 7, characterized in that: The second plug-in portion (220) is a second plug-in hole, the other end of the plug-in structure (300) is adapted to the second plug-in hole, the second locking portion (230) is a second hook, and the second matching portion (340) is a second slot.

9. The fluorescent lamp splicing device according to claim 7, characterized in that: The plug-in structure (300) comprises a flexible wire (350), a first plug-in block (360) and a second plug-in block (370); two ends of the flexible wire (350) are respectively connected to the first plug-in block (360) and the second plug-in block (370); the first plug-in block (360) and the second plug-in block (370) are both provided with the third conductor hole (310); the first plug-in block (360) is adapted to the first plug-in portion (110); the second plug-in block (370) is adapted to the second plug-in portion (220); the first matching portion (320) is provided on the first plug-in block (360); and the second matching portion (340) is provided on the second plug-in block (370).

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