TW201432163A - Fastener module and docking module - Google Patents

Abstract

Disclosed are a fastener module and a docking module, and the fastener module comprises: a fixing section, a fixing frame, an extension section, a fastening section, and an abutting section. The first coupling unit of the fixing section is coupled to a coupling hole of the fixing frame. The extension section is connected to the first coupling unit of the fixing section. A movement channel formed inside the fixing section and the extension section. The fastening section is movably mounted to the extension section. The abutting section comprises an operation unit and an abutting unit that are inter-connected. The operation unit is exposed outside the fixing section. The abutting section is movably arranged in the movement channel and the fastening section can be released or abutted. The docking module comprises a docking seat and a docking ring. The docking seat comprises: a second coupling unit, a docking hole, and a receiving zone. The docking ring is movably received in the receiving zone. The fastening fastens the docking ring. As such, the present invention allows for quickly coupling or disassembling two objects to enhance the convenience of coupling and disassembling.

Description

Fastening module and docking module

The present invention relates to a fastening module and a docking module; and more particularly to a module that is fastened to a docking ring by a fastening portion.

It is conventional to use a screw and a nut for fixing two objects. In use, the holes are respectively opened on the two objects, and then the screws are passed through the openings of the two objects and the nut is pre-screwed into the thread of the screw. Then use a wrench to hold the nut and use another wrench to turn the screw until the screw and nut lock the two objects. However, when the nut is screwed into the thread of the screw, both the screw and the nut must be stabilized. After the wrench has to be rotated a few times, the screw and the nut can be locked together, which is very time consuming and laborious to assemble; If you want to separate the two objects, you need to use two wrenches to fix the screws and rotate the nut several times to separate the two objects. It is also very time-consuming and laborious to disassemble.

Therefore, how to invent a combination module so that it can quickly assemble or disassemble two objects to improve the convenience of assembly or disassembly will be actively disclosed by the present invention.

In view of the shortcomings of the above-mentioned prior art, the inventor feels that he has not perfected it, exhausted his mind and researched and overcome it, and developed a kind of fastening module and docking module based on his accumulated experience in the industry for many years. In order to achieve the purpose of quickly assembling or disassembling two objects to improve the convenience of assembly or disassembly.

In order to achieve the above object, a first aspect of the present invention provides a fastening module, which comprises And comprising: a fixing portion having a first assembling unit; a fixing frame having a plurality of connecting holes, the first connecting unit is coupled to the set of connecting holes; and an extending portion connected to the first An assembly unit, the fixed portion and the extension portion form a movable passage; a fastening portion that is movably disposed on the extension portion; and a top abutment portion having a control unit and an abutting unit connected to each other, The control unit is exposed to the fixing portion, and the top abutting unit is movably disposed on the movable passage and the fastening portion to loosen or abut the fastening portion.

A second aspect of the present invention provides a docking module that interfaces with the above-mentioned fastening module, and includes: a pair of sockets, a second assembly unit, at least one pair of holes, and a receiving area, the capacity The connection area is connected to the docking hole; and the pair of ring body is located in the accommodating area, and the center of the docking ring body is connected to the docking hole, wherein the fastening part of the fastening module is fastened to the docking module Docking ring body.

Thereby, the fastening module and the docking module of the invention can quickly assemble or disassemble two objects to improve the convenience of assembly or disassembly.

1‧‧‧Snap module

10‧‧‧Snap module

1'‧‧‧Snap Module

10'‧‧‧Snap Module

1”‧‧‧Snap Module

10"‧‧‧Snap Module

11‧‧‧ Fixed Department

11’‧‧‧ Fixed Department

11"‧‧‧ Fixed Department

11'''‧‧‧ Fixed Department

111‧‧‧First set of units

111’‧‧‧First set of units

111”‧‧‧The first set of units

111'''‧‧‧The first set of units

112‧‧‧First stop unit

12‧‧‧Extension

121‧‧‧Opening

13‧‧‧Deduction Department

131‧‧‧ buckled sphere

13’‧‧‧Deduction Department

131’‧‧‧ 弹 Button Body

14‧‧‧Abutment

141‧‧‧Control unit

142‧‧‧Abutment unit

143‧‧‧ recessed unit

15‧‧‧Activity Channel

16‧‧‧Parts

17‧‧‧Turning body

171‧‧‧The first top

172‧‧‧Second top

173‧‧‧ pivot

174‧‧‧Turn the handle

18‧‧‧Flexible components

19‧‧‧Retaining frame

191‧‧‧Group holes

192‧‧‧Fixed holes

2‧‧‧Docking module

2'‧‧‧Docking Module

2”‧‧‧Docking module

2'''‧‧‧Docking Module

21‧‧‧ docking station

211‧‧‧Second unit

211’‧‧‧Second unit

211”‧‧‧Second unit

211'''‧‧‧Second unit

212‧‧‧ docking holes

213‧‧‧Receiving area

214‧‧‧Second stop unit

22‧‧‧ docking ring

3‧‧‧First object

31‧‧‧First set of holes

4‧‧‧Second object

41‧‧‧Second set of holes

5‧‧‧Fixed components

Figure 1 is a schematic view of the fastening module of the present invention.

Figure 2 is a schematic view 2 of the fastening module of the present invention.

Figure 3 is a schematic view of the first embodiment of the present invention.

Figure 4 is a schematic view of the first embodiment of the present invention.

Figure 5 is a schematic view 2 of the fastening module of the present invention before the two components are assembled.

Figure 6 is a schematic view 2 of the fastening module of the present invention after the two components are assembled.

Figure 7 is a schematic view 3 of the fastening module of the present invention.

Figure 8 is a schematic view 4 of the fastening module of the present invention.

Figure 9 is a schematic view of the first assembly unit of the fixing portion of the present invention.

Figure 10 is a schematic view of the docking module of the present invention.

Figure 11 is a schematic view of the underside of the docking module of the present invention.

Figure 12 is a schematic view of the second assembly unit of the docking module of the present invention.

Figure 13 is a schematic view of the first embodiment of the present invention before the fastening module and the docking module are assembled.

Figure 14 is a schematic view of the first embodiment of the present invention after the fastening module and the docking module are assembled.

Figure 15 is a schematic view of the second embodiment of the present invention before the fastening module and the docking module are assembled.

Figure 16 is a schematic diagram 2 of the fastening module and the docking module of the present invention.

Figure 17 is a schematic view 5 of the fastening module of the present invention.

Figure 18 is a schematic view 6 of the fastening module of the present invention.

Figure 19 is a schematic view of the fastening module of the present invention.

Figure 20 is a schematic view of the buckle module of the present invention.

In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail with reference to the accompanying drawings. The first aspect of the present invention is a fastening module 1 including a fixing portion 11, a fixing frame 19, an extending portion 12, a fastening portion 13 and A top abutment 14. The fixing portion 11 has a first assembly unit 111, and the first assembly unit 111 can be assembled to an assembly hole of an object by using a lateral assembly structure (for example, a stamping structure). In addition, the fixing portion 11 can have a first stopping unit 112. When the fixing portion 11 is assembled to the assembly hole of the object by using the first assembly unit 111, the first stop The unit 112 can stop the fixing portion 11 on the object to prevent the fixing portion 11 from excessively deepening the object; The fixing frame 19 can be L-shaped and has a plurality of connecting holes 191 on one side thereof. The first connecting unit 111 is assembled to the set of connecting holes 191. In addition, the other side of the fixing frame 19 can have a fixing hole 192. Therefore, the fixing frame 19 can be fixed to an object (not shown) by using a fixing component (not shown). If the fixing bracket 19 does not have the fixing hole 192, the fixing frame 19 can still be glued or welded. The fixing frame 19 is fixed to the metal material or the plastic material according to actual needs; the extending portion 12 is connected to the lower side of the first connecting unit 111, and the fixing portion 11 and the extending portion 12 are formed. a movable passage 15 for penetrating the fixing portion 11 and the extending portion 12; the fastening portion 13 is movably disposed below the extending portion 12 for fastening another object (not shown); the top abutting portion 14 has An operating unit 141 and an abutting unit 142 are connected to each other, and the operating unit 141 is exposed to the fixing portion 11 to enable the user to manipulate the operating unit 141. The abutting unit 142 can be rod-shaped and active in the activity. a passage 15 and the fastening portion 13, whereby when the user pulls up the manipulation unit 141, the manipulation list The 141 will move the abutting unit 142 away from the fastening portion 13, and the fastening portion 13 can be loosened without any object. When the user pushes the manipulation unit 141 downward, the manipulation unit 141 will The abutting unit 142 is driven to reach the fastening portion 13 , and the fastening portion 13 can be abutted by the abutting unit 142 .

Referring to FIG. 1 again, as shown in the figure, the extending portion 12 has at least one opening 121. The figure shows two openings 121. The fastening portion 13 has at least one fastening ball 131, which is shown in the figure. There are two fastening balls 131. The diameter of the inward side of the opening 121 is slightly smaller than the diameter of the fastening ball 131. The diameter of the opening 121 to the outer side is also slightly smaller than the diameter of the fastening ball 131. The splicing ball 131 is movably disposed between the fastening holes 131, and the urging unit 142 is movably disposed between the fastening balls 131. The control unit 141 will drive the abutting unit 142 away from the fastening balls 131. The fastening balls 131 can be loosened by the object and can be retracted into the extension 12 when the user is down. Pushing the manipulation unit 141, The urging unit 141 can drive the abutting unit 142 to reach between the fastening balls 131. The fastening balls 131 can be abutted by the abutting unit 142 and partially protrude outside the extending portion 12.

Referring to FIG. 1 again, as shown in the figure, the fastening module 1 further includes a conical or truncated conical portion 16 , and the alignment portion 16 is coupled to the lower portion of the extension portion 12 when The fastening module 1 is to be connected to the assembly hole (not shown) of the object, and the alignment portion 16 can first align the connection hole and guide the first assembly unit 111 of the fastening module 1 to be assembled. The connection holes in the group improve the convenience of the assembly.

2 is a schematic view 2 of the fastening module of the present invention. As shown in the figure, the fastening portion 13 ′ can have at least one spring body 131 ′, and two elastic body 131 ′ are displayed in the drawing. The button body 131 ′ is connected to the lower portion of the extension portion 12 , and the top abutting unit 142 is movably disposed between the elastic body 131 ′, so that when the user pulls the manipulation unit 141 upwards, the manipulation unit 141 The ejector unit 142 is driven away from the elastic body 131', and the elastic body 131' is detached from the object and can be loosened and deformed inward. When the user pushes the steering unit 141 downward, the user The control unit 141 will drive the abutting unit 142 to reach between the latch bodies 131', and the latching bodies 131' can be abutted by the abutting unit 142 and cannot be deformed inward.

Figure 3 to Figure 6 are schematic diagrams of the first embodiment of the present invention. The first embodiment of the fastening module is connected to the two objects. And the second embodiment of the fastening module is connected to the two objects. As shown in the figure, the fastening module 1, 1' of the first and second embodiments of the present invention first utilizes the fastening module 1, 1 The fixing hole 192 of the fixing frame 19 and a fixing member 5 (such as a screw) are assembled to the first group of connecting holes 31 of the first object 3, and then the steering unit 141 of the abutting portion 14 is pulled upward to make the top abutting The abutting unit 142 of the portion 14 is separated from the fastening ball 131 and the elastic body 131', thereby releasing the fastening ball 131 and the elastic body 131', since the fastening balls 131 are contractible In the extension portion 12, the elastic body 131' can be deformed inward, so the fastening module 1, 1' can penetrate the second set of holes 41 of the second object 4, and then push the manipulation unit 141 of the abutting portion 14 downward so that the abutting unit 142 of the abutting portion 14 reaches the fastening balls 131. Between the latching bodies 131' and the latching balls 131 and the latching bodies 131', the latching balls 131 cannot be retracted into the extending portion 12, and the bullets The buckle body 131' cannot be deformed inwardly, so that the fastening ball 131 and the elastic body 131' can be fastened to the second set of holes 41 of the second object 4, thereby making the first object 3 and the second object The objects 4 are grouped together. If the first object 3 and the second object 4 are to be detached, the manipulation unit 141 of the abutting portion 14 only needs to be pulled up to release the fastening balls 131 and the elastic bodies 131'.

As described above, the fastening module of the present invention can quickly assemble or disassemble two objects to improve the convenience of assembly or disassembly.

7 and 8 are respectively schematic diagrams 3 and 4 of the fastening module of the present invention. As shown in the figure, the fastening module 1 ′′ further includes a turning body 17 , and the turning body 17 has a wrench a pivoting handle 174, a first top abutting edge 171 and a second top abutting edge 172, the pivoting body 17 pivotally connected with the steering unit 141 and form a pivoting portion 173, the first top abutting edge 171 or the first The distance between the pivoting portion 173 and the first top abutting edge 171 is greater than the distance from the pivoting portion 173 to the second top abutting edge 172. When the user pulls up When the cranking handle 174 of the turning body 17 is moved, the turning body 17 rotates relative to the pivoting portion 173, and the first top abutting edge 171 abuts against the fixing portion 11, due to the pivoting The distance from the portion 173 to the first top abutting edge 171 is relatively large. Therefore, the pivoting body 17 pulls up the steering unit 141 of the abutting portion 14 , and the steering unit 141 drives the top abutting portion 14 to abut the top abutting portion 14 . The unit 142 leaves the fastening ball 131, and the fastening ball 131 can be loosened by the object and can be retracted into the extension 12; when the user pulls the wrench of the toggle body 17 downward Turn 174, which will pull the swivel 17 with respect to the rotation of the pivot 173, the second and the top edge 172 will abut against the top of the fixing portion 11, Since the distance between the pivoting portion 173 and the second top abutting edge 172 is small, the turning body 17 pushes down the steering unit 141 of the abutting portion 14, and the steering unit 141 drives the topping The abutting unit 142 of the portion 14 reaches between the fastening balls 131, and the fastening balls 131 can be abutted by the abutting unit 142 and partially protrude outside the extending portion 12. 7 and 8 show the state in which the toggle body 17 and the elastic member 18 are used in the fastening module 1 of FIG. 1. Similarly, the toggle body 17 and the elastic member 18 can also be used. The fastening module 1' used in Fig. 2 is used. Furthermore, the state in which the fastening modules including the turning body 17 and the elastic member 18 are connected to the two objects 3, 4 can also be referred to the description of FIGS. 3 to 6 above.

Referring to FIG. 7 and FIG. 8 again, as shown, the fastening module 1 ′′ can further include an elastic member 18 , one end of the elastic member 18 abutting against the wall surface of the movable channel 15 , for example, the movable channel 15 . Inwardly protruding structure, the other end of the elastic member 18 abuts against the abutting unit 142, for example, the structure of the abutting unit 142 protruding outward. When the user pulls the turning handle 174 of the turning body 17 upward The first top edge 171 will abut against the fixing portion 11, the elastic member 18 will be compressed, and the elastic member 18 is compressed and stored elastic force to maintain the fastening module 1" in the state of FIG. When the user pulls the turning handle 174 of the turning body 17 downward, the second top edge 172 will abut against the fixing portion 11, and the elastic element 18 is compressed and the stored elastic force is partially released. The elastic force that the elastic member 18 is not released will maintain the fastening module 1" in the state of FIG.

Referring to FIG. 3 to FIG. 6 again, as shown in the figure, the above-mentioned manipulation unit 141 may be T-shaped to facilitate the user to pull up the manipulation unit 141 of the abutment portion 14 or push the abutment portion 14 downward. The manipulation unit 141.

Figure 9 is a schematic view of the first assembly unit of the fixing portion of the present invention. As shown, the first assembly unit 111 of the fixing portion 11 is a stamped structure, and the first assembly unit 111', 111" , 111''' can also be screw-locked (such as Figure 9 (a)), expanded structure (such as Figure 9 (b)), welded structure (such as Figure 9 (b)), sticky according to actual use requirements. Connection structure (such as Figure 9 (b)) or fastening structure (such as Figure 9 (c)).

FIG. 10 is a schematic view of the docking module of the present invention. As shown in the figure, the second aspect of the present invention is a docking module 2 comprising a pair of sockets 21 and a pair of ring bodies 22. The docking station 21 has a second connecting unit 211, at least one pair of connecting holes 212, and a receiving area 213. The receiving area 213 is connected to the docking hole 212, and the second connecting unit 211 can utilize the lateral direction thereof. The assembly structure (for example, a stamping structure) is assembled to an assembly hole (not shown) of an object. In addition, the docking seat 21 can have a second stop unit 214 around the docking seat 21. When the second assembly unit 211 is assembled to the assembly hole of the object, the second stop unit 214 can stop the docking seat 21 on the object to prevent the docking seat 21 from excessively deepening the object; the docking ring The body 22 is limited to the accommodating area 213. The center of the docking ring 22 communicates with the docking hole 212. Referring to FIG. 1 , FIG. 2 and FIG. 7 , the fastening module 1 , 1 ′, 1 The fastening portions 13, 13', 13 of the "but" can be fastened to the mating ring body 22 of the docking module 2.

11 is a schematic view of the lower side of the docking module of the present invention. As shown in the figure, the docking ring body 22 may have a circular shape, and the receiving portion 213 may have a circular cross section to correspond to the butting ring body 22. Section shape.

Figure 12 is a schematic view of the second assembly unit of the docking module of the present invention. As shown, the second assembly unit 211 of the docking station 21 is a stamping structure, and the second assembly unit 211', 211 ", 211''' can also be screw-locked (such as Figure 12 (a)), expanded structure (such as Figure 12 (b)), welded structure (such as Figure 12 (b)) depending on actual use requirements. , bonding structure (such as Figure 12 (b)) or fastening structure (such as Figure 12 (c)).

Referring to FIG. 10 again, as shown in the figure, the second assembly unit 211 may be located around the docking hole 212.

FIG. 13 to FIG. 16 are respectively a schematic view of the first embodiment of the present invention after the fastening module and the docking module are assembled. FIG. 1 is a schematic diagram of the assembly after the fastening module and the docking module are assembled. In the second embodiment, as shown in the figure, the fastening modules 1 and 1' of the first and second embodiments of the present invention and the docking module 2 of the eleventh embodiment first utilize the fastening module 1, The fixing hole 192 of the fixing frame 19 of the 1' and the fixing component 5 (such as a screw) are assembled to the first group of connecting holes 31 of the first object 3, and the second grouping unit 211 of the docking module 2 is assembled with the second grouping unit 211 of the docking module 2 The second set of holes 41 of the second object 4 is then pulled upward to pull the control unit 141 of the abutting portion 14 such that the abutting unit 142 of the abutting portion 14 leaves the fastening ball 131 and the latch body 131 ', and then the fastening balls 131 and the elastic bodies 131' are loosened. Since the fastening balls 131 can be retracted into the extending portion 12, the elastic bodies 131' can be deformed inward, so The fastening portion 13 , 13 ′ of the fastening module 1 , 1 ′ can penetrate the docking ring body 22 of the docking module 2 , and at this time, the docking ring body 22 is located in the accommodating area 213 , The docking ring body 22 can be laterally moved in the accommodating area 213. If the fastening portions 13 and 13 ′ of the fastening module 1 , 1 ′ are not biased toward the center of the docking ring body 22 , the The docking ring body 22 can be moved laterally so that the fastening portions 13, 13' of the fastening module 1, 1' are facing the center of the docking ring body 22, thereby fastening the fastening module 1, 1' The connecting portion 13 , 13 ′ penetrates the docking ring body 22 of the docking module 2 , and then pushes the steering unit 141 of the abutting portion 14 downward to cause the abutting unit 142 of the abutting portion 141 to reach the fastening balls Between the 131s and the latching bodies 131', and thus the latching balls 131 and the latching bodies 131', the latching balls 131 cannot be retracted into the extending portion 12, The latching body 131' cannot be deformed inwardly, so that the latching ball 131 and the latching body 131' can be fastened to the mating ring body 22 of the docking module 2, thereby making the first object 3 and the second object The objects 4 are grouped together. If the first object 3 and the second object 4 are to be detached, the manipulation unit 141 of the abutting portion 14 only needs to be pulled up to release the fastening balls 131 and the elastic bodies 131'. In addition, Fig. 13 to Fig. 16 show the use of the fastening modules 1, 1' of Figs. 1 and 2; In the same way, the above state of use can also be applied to the fastening module 1" of FIG.

17 to 20 are respectively schematic diagrams 5 to 8 of the fastening module of the present invention, as shown in the figure, the fastening modules 10, 10', 10" and 1 of the 17th to 20th drawings are shown. The fastening modules 1, 1 ', 1" of FIGS. 2 and 7 to 8 are different in the fastening modules 10, 10', 10" of FIGS. 17 to 20 The abutting unit 142 has a plurality of recessed units 143 which enable the fastening modules 10, 10', 10" of FIGS. 17 to 20 and FIGS. 1 to 2 and 7 to 8 The fastening module 1, 1 ', 1" of the figure is operated in the opposite manner. When the user pulls the manipulation unit 141 upward, the manipulation unit 141 drives the abutting unit 142 to reach between the fastening balls 131 and Between the latching bodies 131' and the latching balls 131 and the latching bodies 131', the latching balls 131 cannot be retracted into the extending portion 12, and the latching bodies 131 'There is no inward deformation; when the user pushes the steering unit 141 downwards, the steering unit 141 drives the abutting unit 142 to cause the recessed units 143 of the abutting unit 142 to reach the fastening balls 131. Between the latching bodies 131' and the latching balls 131 and the latching bodies 131', the latching balls 131 can be retracted into the recessed units 143. The button body 131' can be deformed into the recessed unit 143.

As described above, the fastening module and the docking module of the present invention can quickly assemble or disassemble two objects to improve the convenience of assembly or disassembly.

The invention has been described above in terms of the preferred embodiments, and it should be understood by those skilled in the art that the present invention is not intended to limit the scope of the invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of protection of the present invention is defined by the scope of the patent application.

1‧‧‧Snap module

11‧‧‧ Fixed Department

111‧‧‧First set of units

112‧‧‧First stop unit

12‧‧‧Extension

121‧‧‧Opening

13‧‧‧Deduction Department

131‧‧‧ buckled sphere

14‧‧‧Abutment

141‧‧‧Control unit

142‧‧‧Abutment unit

15‧‧‧Activity Channel

16‧‧‧Parts

19‧‧‧Retaining frame

191‧‧‧Group holes

192‧‧‧Fixed holes

Claims (16)

A fastening module includes: a fixing portion having a first assembling unit; a fixing frame having a plurality of connecting holes, the first connecting unit being coupled to the set of connecting holes; and an extending portion Connected to the first assembly unit, the fixed portion and the extension portion form a movable passage; a fastening portion movably disposed on the extension portion; and a top abutment portion having a control unit connected to each other And a topping unit, the operating unit is exposed to the fixing portion, and the abutting unit is movably disposed on the movable channel and the fastening portion to loosen or abut the fastening portion. The fastening module of claim 1, wherein the extension has at least one opening, the fastening portion has at least one fastening ball, and the fastening ball is limited to the opening, and the top is abutted. The unit activity is disposed on the buckle ball to release or abut the buckle ball. The fastening module of claim 2, further comprising a conical or frustoconical alignment portion, the alignment portion being coupled to the extension portion. The fastening module of claim 1, wherein the fastening portion has at least one elastic body, the elastic body is connected to the extension portion, and the top abutting unit is movably disposed on the elastic body Loosen or pull against the buckle body. The fastening module of claim 1, further comprising a toggle body having a first top abutting edge and a second top abutting edge, the toggle body and the steering unit Pivoting and forming a pivotal portion, the first top abutting edge or the second top abutting abuts against the fixing portion, the distance from the pivoting point to the first top abutting edge and the pivoting point to the second The distance from the top edge is different. The fastening module of claim 1, further comprising an elastic member, one end of the elastic member abutting against a wall surface of the movable passage, and the other end of the elastic member abutting against the abutting unit. The fastening module of claim 1, wherein the control unit is T-shaped. The fastening module of claim 1, wherein the first assembly unit is a stamping structure, a screw locking structure, an expansion structure, a welding structure, a bonding structure or a fastening structure. The fastening module of claim 1, wherein the fixing frame is L-shaped. The fastening module of claim 1, wherein the fixing frame is made of metal. The fastening module of claim 1, wherein the fixing frame is made of plastic material. A docking module for docking a fastening module according to any one of the preceding claims, comprising: a pair of sockets having a second assembly unit, at least one pair of holes and a accommodating area, the accommodating area is connected to the docking hole; and a pair of splicing body is located in the accommodating area, and the center of the docking ring body is connected to the docking hole, wherein the fastening module is fastened The part is fastened to the docking ring of the docking module. The docking module of claim 12, wherein the docking ring body has a circular shape. The docking module of claim 12, wherein the accommodating area has a circular cross section. The docking module of claim 12, wherein the second group of connecting units is a stamping structure, a screw locking structure, an expanding structure, a welding structure, a bonding structure or a fastening structure. The docking module of claim 12, wherein the second grouping unit is located around the docking hole.