Battery cell module pressurizing and boxing equipment

Abstract

The utility model relates to the field of battery production equipment, in particular to battery cell module pressurizing and boxing equipment. The battery cell module pressurizing and boxing equipment comprises a pressurizing mechanism and a boxing mechanism; the pressurizing mechanism comprises a first truss and a pressurizing module, and the pressurizing module can move along the first truss so as to pick up and transport the battery cell module to a boxing position; the pressurizing module can perform peristaltic pressurizing on the picked battery cell module; the boxing mechanism comprises a second truss, a boxing module and a pressing module; the box entering module can move along the second truss so as to be detachably connected with the corresponding pressing module and move to a box entering position, and the box entering module and the pressing module at the box entering position can press the battery cell module picked up by the pressurizing module into the box body. According to the battery cell module pressurizing and boxing equipment provided by the invention, when peristaltic pressurizing is carried out on battery cell modules of various models, automatic model changing and downward pressing modules can be correspondingly carried out according to different specifications of the battery cell modules, the model changing time is short, the efficiency is high, and the battery production efficiency can be further improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of battery production equipment, in particular to a battery cell module pressurizing and box loading device. BACKGROUND

[0002] The battery module peristalsis pressurizing and box loading process is an essential step in the battery production process. The battery module peristalsis process is performed before single-module box loading, and the purpose is to eliminate the internal stress of the single-row module composed of multiple battery cells, promote the row module to reach the preset external dimensions, so that the battery module can be smoothly loaded into the box, thereby ensuring the safety of the battery pack.

[0003] When pressurizing and loading multiple types of battery cell modules, the type needs to be changed according to the different specifications of the battery cell modules. The existing process equipment for pressurizing and loading battery cell modules mainly has the problem of long type changing time, which reduces the battery production efficiency. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the application is to provide a battery cell module pressurizing and box loading device that can change the down pressure module according to the different specifications of the battery cell module, and has a short type changing time and high efficiency.

[0005] The application provides a battery cell module pressurizing and box loading device, which comprises a pressurizing mechanism and a box loading mechanism.

[0006] The pressurizing mechanism comprises a first row frame and a pressurizing module, the pressurizing module can move along the first row frame to pick up and transport the battery cell module to a box loading position, and the pressurizing module can peristaltically pressurize the picked-up battery cell module.

[0007] The box loading mechanism comprises a second row frame, a box loading module and a down pressure module; the box loading module can move along the second row frame to be detachably connected with the corresponding down pressure module and moved to the box loading position, and the box loading module and the down pressure module can press the battery cell module picked up by the pressurizing module into the box at the box loading position.

[0008] In the above technical solution, further, the down pressure module comprises a first connecting plate, a first driving part and a down pressure assembly.

[0009] The first connecting plate is detachably connected with the box loading module, and the first driving part is installed between the first connecting plate and the down pressure assembly to drive the down pressure assembly to press the battery cell module into the box in the box loading direction.

[0010] In the above technical solution, further, the first driving part comprises a first driving assembly and a first guide assembly.

[0011] The first driving assembly comprises a plurality of first driving devices arranged at intervals; each of the first driving devices is mounted on the first connecting plate, and the driving end of each of the first driving devices is connected with the lower pressing assembly, or each of the first driving devices is connected with the lower pressing assembly, and the driving end of each of the first driving devices is mounted on the first connecting plate;

[0012] The first guiding assembly comprises a plurality of first guiding columns arranged at intervals; one of the first connecting plate and the lower pressing assembly is provided with the first guiding column, and the other is correspondingly provided with a first guiding hole; the first guiding column penetrates through the first guiding hole and can axially move relative to the first guiding hole.

[0013] In the above technical solution, further, the lower pressing assembly comprises a second connecting plate, a second driving part and a suction accessory;

[0014] The first driving part is connected with the second connecting plate;

[0015] The suction accessory is used for adsorbing the battery cell module; the second driving part is mounted on the second connecting plate and connected with the suction accessory, so as to drive the suction accessory to press the battery cell module into the box in the box-in direction.

[0016] In the above technical solution, further, the second driving part comprises a second driving assembly and a second guiding assembly;

[0017] The second driving assembly comprises a plurality of second driving devices arranged at intervals; each of the second driving devices is mounted on the second connecting plate, and the driving end of each of the second driving devices is connected with the suction accessory;

[0018] The second guiding assembly comprises a plurality of second guiding columns arranged at intervals; one of the second connecting plate and the suction accessory is provided with the second guiding column, and the other is correspondingly provided with a second guiding hole; the second guiding column penetrates through the second guiding hole and can axially move relative to the second guiding hole.

[0019] In the above technical solution, further, the suction accessory comprises at least one suction disc;

[0020] The second driving part is connected with the suction disc;

[0021] The suction disc is correspondingly arranged with the battery cell queue formed by the battery cell module, so that at least one suction disc adsorbs one battery cell queue;

[0022] The suction disc is circumferentially surrounded by a limiting piece; the limiting piece is connected with the second connecting plate, so as to limit the pressure of the battery cell queue adsorbed by the suction disc in the box-in direction.

[0023] Further, the box feeding mechanism further comprises a quick-change device.

[0024] The quick-change device comprises a first connecting disc and a second connecting disc; the first connecting disc is connected with the box feeding module, the second connecting disc is connected with the lower pressing module, and the first connecting disc and the second connecting disc are detachably connected.

[0025] Further, the pressing mechanism further comprises a first conveying line.

[0026] The first conveying line is used for conveying the battery cell module; and the conveying path of the first conveying line passes through the first row frame, so that the pressing module moving along the first row frame can pick up the battery cell module on the first conveying line.

[0027] Further, the box feeding mechanism further comprises a second conveying line.

[0028] The second conveying line is used for conveying the lower pressing module; and the conveying path of the second conveying line passes through the second row frame, so that the lower pressing module moving along the second row frame can be detachably connected with the box feeding module on the second conveying line.

[0029] Further, the pressing module comprises a guiding assembly and a picking assembly.

[0030] The picking assembly picks up and peristaltically presses the battery cell module.

[0031] The guiding assembly is located on the side of the picking assembly close to the lower pressing module, and the guiding assembly is provided with a hollow area to guide the pressing action of the lower pressing module.

[0032] Compared with the prior art, the application has the following advantages:

[0033] The battery cell module pressing and boxing equipment provided by the application can move the box feeding module along the second row frame to the second feeding end of the upper pressing module, so as to automatically change the type of the lower pressing module according to the different specifications of the battery cell module, and the changing time is short and the efficiency is high, thereby improving the battery production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the accompanying drawings needed to be used in the specific embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on these embodiments also belong to the protection scope of the present application.

[0035] Figure 1 The structural schematic diagram of the battery cell module press-in-box equipment provided by the present application is shown in the figure.

[0036] Figure 2 The assembly structural schematic diagram of the press-in-box module and the down-press module provided by the present application is shown in the figure.

[0037] Figure 3 The first structural schematic diagram of the down-press module provided by the present application is shown in the figure.

[0038] Figure 4 The second structural schematic diagram of the down-press module provided by the present application is shown in the figure.

[0039] Figure 5 The structural schematic diagram of the down-press module provided by the present application is shown in the figure. Figure 1 The enlarged schematic diagram of A in the figure.

[0040] In the figure: 101-pressing mechanism; 102-press-in-box mechanism; 103-first row frame; 104-pressing module; 105-second row frame; 106-press-in-box module; 107-down-press module; 108-first connecting plate; 109-first driving assembly; 110-first guiding assembly; 111-second connecting plate; 112-suction accessory; 113-second driving assembly; 114-second guiding assembly; 115-cross plate; 116-limiting piece; 117-suction disc; 118-fast exchange device; 119-first conveying line; 120-second conveying line; 121-guiding assembly; 122-hollow area. DETAILED DESCRIPTION

[0041] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work also belong to the protection scope of the present application.

[0042] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Embodiment one

[0045] Referring to Figures 1 to 5 As shown in the figure, the battery cell module pressing and boxing equipment provided by the present application comprises a pressing mechanism 101 and a boxing mechanism 102.

[0046] The pressing mechanism 101 comprises a first row frame 103 and a pressing module 104. The pressing module 104 can move along the first row frame 103 to pick up the battery cell module at the first feeding end. After picking up the battery cell module, the pressing module 104 can move along the first row frame 103 to transport the battery cell module to the boxing position. At the boxing position, the pressing module 104 can apply peristaltic pressure to the picked-up battery cell module before the battery cell module is boxed, so as to eliminate the stress inside the single-row module composed of multiple battery cells, so that the row of battery cell modules reaches the preset external size. And in the subsequent process of boxing the battery cell module, the pressing module 104 can continuously press the battery cell module, so that the battery cell module is smoothly boxed while maintaining the state of being pressed.

[0047] The boxing mechanism 102 comprises a second row frame 105, a boxing module 106 and a pressing module 107. According to different models and quantities of the battery cell module, the boxing module 106 can move along the second row frame 105 to the second feeding end. At the second feeding end, the boxing module 106 can be detachably connected with the corresponding pressing module 107, so as to realize quick replacement of the pressing module 107 of different sizes, thereby realizing mixed production of the battery cell module. After the boxing module 106 is connected with the corresponding pressing module 107, the boxing module 106 can move along the second row frame 105 to the boxing position. At the boxing position, the boxing module 106 and the pressing module 107 can press the battery cell module picked up by the pressing module 104 into the box.

[0048] The battery cell module pressing and boxing equipment provided by the application can realize peristalsis pressing of multiple models of battery cell modules. The boxing module 106 can move along the second row frame 105 to the second feeding end of the pressing module 107, so as to automatically replace the pressing module 107 according to different specifications of the battery cell module, and the replacement time is short and the efficiency is high, thereby improving the battery production efficiency.

[0049] In the optional scheme of the embodiment, the pressing module 107 comprises a first connecting plate 108, a first driving part and a pressing assembly. The first connecting plate 108 is detachably connected with the boxing module 106, so that the boxing module 106 can be connected with and separated from different pressing modules 107, thereby realizing adaptation to different models and quantities of the battery cell module. The first driving part is installed between the first connecting plate 108 and the pressing assembly, so as to drive the pressing assembly to press the battery cell module into the box in the boxing direction.

[0050] Preferably, the first driving part comprises a first driving assembly 109 and a first guide assembly 110. The first driving assembly 109 comprises a plurality of first driving devices arranged at intervals. The plurality of first driving devices are all installed on the first connecting plate 108, and the driving ends of the plurality of first driving devices are all connected with the pressing assembly, or the plurality of first driving devices are all connected with the pressing assembly, and the driving ends of the plurality of first driving devices are all installed on the first connecting plate 108.

[0051] Figure 3 And Figure 4 The first driving device shown in the above formula is a pneumatic cylinder, and four pneumatic cylinders arranged at intervals are retracted or extended to drive the whole pressing assembly to rise or fall. When the pressing module 107 is in a non-pressing state, the four pneumatic cylinders are in a retracted state, and the pressing assembly is close to the first connecting plate 108 upward. When the battery cell module needs to be boxed, the four pneumatic cylinders can serve as a balance to the gravity of the battery cell module. When the boxing module 106 drives the pressing module 107 to press the battery cell module, the four pneumatic cylinders are also extended to press the battery cell module.

[0052] Further, the first guiding assembly 110 comprises a plurality of first guiding columns arranged at intervals, Figure 3 As shown in the figure, four first guiding columns are arranged at intervals at four corners of the first connecting plate 108. The first connecting plate 108 is provided with a first guiding column and the other is provided with a first guiding hole corresponding to the first guiding column. The first guiding column penetrates the first guiding hole and can move axially relative to the first guiding hole to guide the telescopic movement of the pressing assembly 107.

[0053] In an optional scheme of the embodiment, the pressing assembly comprises a second connecting plate 111, a second driving part and a suction accessory 112. The second connecting plate 111 is located between the first connecting plate 108 and the suction accessory 112, and the first driving part is connected to the second connecting plate 111. The suction accessory 112 is used for adsorbing the battery cell module. The second driving part is used for providing power for the extension and retraction of the suction accessory 112. The second driving part is installed on the second connecting plate 111, and the second driving part is connected to the suction accessory 112 to further drive the suction accessory 112 to press the battery cell module into the box in the direction of the box.

[0054] In an optional scheme of the embodiment, the second driving part comprises a second driving assembly 113 and a second guiding assembly 114. The second driving assembly 113 comprises a plurality of second driving devices arranged at intervals; the plurality of second driving devices are installed on the second connecting plate 111, and the driving ends of the plurality of second driving devices are connected to the suction accessory 112. Figure 3 and Figure 4 As shown in the figure, the second driving device is a pneumatic cylinder, and the four pneumatic cylinders arranged at intervals are retracted or extended to drive the suction accessory 112 to rise or fall as a whole.

[0055] The second guiding assembly 114 comprises a plurality of second guiding columns arranged at intervals; one of the second connecting plate 111 and the suction accessory 112 is provided with a second guiding column, and the other is provided with a second guiding hole corresponding to the second guiding column. The second guiding column penetrates the second guiding hole and can move axially relative to the second guiding hole to guide the telescopic movement of the suction accessory 112.

[0056] As shown in the figures, Figure 3 and Figure 4 As shown in the figures, the second connecting plate 111 comprises a vertical plate and two layers of horizontal plates 115 arranged at intervals. The vertical plate is located between the two layers of horizontal plates 115 to play a connecting role. The first driving assembly 109 and the first guiding column are installed on the upper horizontal plate 115, and the second driving assembly 113 is installed on the lower horizontal plate 115. The upper horizontal plate 115 is provided with a clearance hole to avoid the second driving assembly 113.

[0057] In an optional solution of the embodiment, the suction accessory 112 comprises at least one suction cup 117. The second driving part is connected with the suction cup 117 to drive the suction cup 117 to extend and retract relative to the second connecting plate 111, thereby providing power for the extension and retraction of the suction cup 117. The suction cup 117 is arranged corresponding to the battery cell queue formed by the battery cell module, so that at least one suction cup 117 adsorbs one battery cell queue, and the second driving part can drive the suction cup 117 to press the battery cell module into the box in the box-in direction. The suction cup 117 is specifically a sponge suction cup, which is used to adsorb the battery cell module. Figure 4 Two sponge suction cups are shown in the middle to adsorb two rows of battery cell queues respectively.

[0058] The suction cup 117 is circumferentially surrounded by a limiting piece 116, which is connected with the second connecting plate 111 to limit the pressure of the battery cell queue adsorbed by the suction cup 117 in the box-in direction. The limiting piece 116 is specifically a pressing strip, which can be in contact with the periphery of the battery cell module, thereby avoiding deformation of the battery cell module when entering the box. It should be noted that the length of the pressing strip corresponding to the battery cell module of different sizes is different, and therefore the pressing strip and the second connecting plate 111 are detachably connected.

[0059] In an optional solution of the embodiment, the box-in mechanism 102 further comprises a quick-change device 118; the quick-change device 118 comprises a first connecting disc and a second connecting disc; the first connecting disc is connected with the box-in module 106, and the second connecting disc is connected with the pressing module 107, and the first connecting disc and the second connecting disc are detachably connected. The quick-change device 118 is specifically a gun-changing disc, and the male-female connection of the gun-changing disc can realize the quick-change operation of the pressing module 107.

[0060] In an optional solution of the embodiment, the box-in mechanism 102 further comprises a second conveying line 120; the second conveying line 120 is used to transport the pressing module 107 to feed a plurality of pressing modules 107 of different sizes, thereby adapting to battery cell modules of different models and sizes, and realizing mixed-line production of battery cell modules of different models and sizes. Moreover, the conveying path of the second conveying line 120 passes through the second row rack 105, and when the pressing module 107 moves along the second row rack 105 to the second conveying line 120, the pressing module 107 can be detachably connected with the box-in module 106 on the second conveying line 120, thereby realizing the quick-change operation of the pressing module 107.

[0061] Embodiment Two

[0062] The battery cell module pressurizing and box-in equipment in the embodiment two is an improvement on the basis of the above-mentioned embodiment, and the technical contents disclosed in the above-mentioned embodiment are not repeatedly described, and the contents disclosed in the above-mentioned embodiment also belong to the contents disclosed in the embodiment two.

[0063] Reference Figure 1As shown, in the optional scheme of the embodiment, the pressing mechanism 101 further comprises a first conveying line 119. The first conveying line 119 is used to transport the battery cell module, so as to load the battery cell modules of different sizes, thereby realizing mixed-line production of battery cell modules of different models and sizes. The conveying path of the first conveying line 119 passes through the first row of racks 103, and when the pressing module 104 moves along the first row of racks 103 to the first conveying line 119, the pressing module 104 can pick up the battery cell module on the first conveying line 119 and convey the battery cell module to the boxing position.

[0064] In the optional scheme of the embodiment, the pressing module 104 comprises a guiding assembly 121 and a picking assembly; the picking assembly picks up and peristaltically presses the battery cell module; the guiding assembly 121 is located at the side of the picking assembly close to the pressing-down module 107, and the guiding assembly 121 is provided with a hollow area 122 to guide the pressing-down action of the pressing-down module 107.

[0065] In the embodiment, the picking assembly comprises two pressing driving assemblies and two pressing pieces, the two pressing pieces are connected with the driving ends of the two pressing driving assemblies respectively, and the two pressing driving assemblies are oppositely arranged to pick up and peristaltically press the battery cell module from both sides. The pressing driving assembly comprises two pressing motors on the same side, and the driving ends of the two pressing motors are connected with the pressing pieces. The stroke of the pressing motor is appropriately selected, which can theoretically be compatible with most battery cell modules.

[0066] The guiding assembly 121 is arranged above the picking assembly and in a frame shape. When the boxing module 106 drives the pressing-down module 107 to move above the guiding assembly 121, the boxing module 106 drives the pressing-down module 107 to press down the battery cell module, and in the process of pressing down the battery cell module, the hollow area 122 inside the guiding assembly 121 can guide the battery cell module.

[0067] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. In addition, those skilled in the art can understand that although some embodiments include certain features but not others included in other embodiments, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments.

Claims

1. A cell module press-in-box apparatus, characterized by, The pressing mechanism (101) and the boxing mechanism (102) are included. The pressing mechanism (101) includes a first rack (103) and a pressing module (104), the pressing module (104) is capable of moving along the first rack (103) to pick up and transport the battery cell module to a boxing position, and the pressing module (104) is capable of peristaltic pressing on the picked-up battery cell module. The boxing mechanism (102) includes a second rack (105), a boxing module (106) and a pressing-down module (107), the boxing module (106) is capable of moving along the second rack (105) to be detachably connected with the corresponding pressing-down module (107) and moved to the boxing position, at the boxing position, the boxing module (106) and the pressing-down module (107) are capable of pressing the battery cell module picked up by the pressing module (104) into a box.

2. The cell module press-in-box apparatus according to claim 1, characterized by, The pressing-down module (107) includes a first connecting plate (108), a first driving part and a pressing-down assembly. The first connecting plate (108) is detachably connected with the boxing module (106), and the first driving part is installed between the first connecting plate (108) and the pressing-down assembly to drive the pressing-down assembly to press the battery cell module into the box in a boxing direction.

3. The cell module press-in-box apparatus according to claim 2, characterized by, The first driving part includes a first driving assembly (109) and a first guiding assembly (110). The first driving assembly (109) includes a plurality of first driving devices arranged at intervals, each of the plurality of first driving devices is installed on the first connecting plate (108), and the driving end of each of the plurality of first driving devices is connected with the pressing-down assembly, or each of the plurality of first driving devices is connected with the pressing-down assembly, and the driving end of each of the plurality of first driving devices is installed on the first connecting plate (108). The first guiding assembly (110) includes a plurality of first guiding columns arranged at intervals, one of the first connecting plate (108) and the pressing-down assembly is provided with the first guiding column, and the other is correspondingly provided with a first guiding hole, the first guiding column penetrates through the first guiding hole and is capable of axially moving relative to the first guiding hole.

4. The cell module press-in-box apparatus according to claim 2, characterized by, The pressing-down assembly includes a second connecting plate (111), a second driving part and a suction accessory (112). The first driving part is connected with the second connecting plate (111). The suction accessory (112) is used for adsorbing the battery cell module, the second driving part is installed on the second connecting plate (111) and connected with the suction accessory (112) to drive the suction accessory (112) to press the battery cell module into the box in the boxing direction.

5. The cell module press-in-box apparatus according to claim 4, wherein The second driving part includes a second driving assembly (113) and a second guiding assembly (114). The second driving assembly (113) includes a plurality of second driving devices arranged at intervals, each of the plurality of second driving devices is installed on the second connecting plate (111), and the driving end of each of the plurality of second driving devices is connected with the suction accessory (112). The second guiding assembly (114) comprises a plurality of second guiding columns arranged at intervals; one of the second connecting plate (111) and the suction accessory (112) is provided with the second guiding column, and the other is provided with a corresponding second guiding hole; the second guiding column penetrates through the second guiding hole and can move axially relative to the second guiding hole.

6. The cell module press-in-box apparatus according to claim 4, wherein The suction accessory (112) comprises at least one suction disc (117); The second driving part is connected with the suction disc (117); The suction disc (117) is arranged corresponding to the battery cell queue formed by the battery cell module, so that at least one suction disc (117) adsorbs one battery cell queue; The suction disc (117) is circumferentially surrounded by a limiting piece (116), and the limiting piece (116) is connected with the second connecting plate (111) to press and limit the battery cell queue adsorbed by the suction disc (117) in the box-in direction.

7. The battery cell module press-in-box apparatus of claim 1, wherein, The box-in mechanism (102) further comprises a quick-change device (118); The quick-change device (118) comprises a first connecting disc and a second connecting disc; the first connecting disc is connected with the box-in module (106), and the second connecting disc is connected with the pressing-down module (107); the first connecting disc and the second connecting disc are detachably connected.

8. The battery cell module press-in-box apparatus of claim 1, wherein, The pressing mechanism (101) further comprises a first conveying line (119); The first conveying line (119) is used for transporting the battery cell module; and the conveying path of the first conveying line (119) passes through the first row frame (103), so that the pressing module (104) moving along the first row frame (103) can pick up the battery cell module on the first conveying line (119).

9. The battery cell module press-in-box apparatus of claim 1, wherein, The box-in mechanism (102) further comprises a second conveying line (120); The second conveying line (120) is used for transporting the pressing-down module (107); and the conveying path of the second conveying line (120) passes through the second row frame (105), so that the pressing-down module (107) moving along the second row frame (105) can be detachably connected with the box-in module (106) on the second conveying line (120).

10. The battery cell module press-in-box apparatus of claim 1, wherein, The pressing module (104) comprises a guiding assembly (121) and a picking assembly; The picking assembly picks up and peristaltically presses the battery cell module; The guiding assembly (121) is located on the side of the picking assembly close to the pressing-down module (107), and the guiding assembly (121) is provided with a hollow area (122) to guide the pressing action of the pressing-down module (107).

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