A power tool

Abstract

The application belongs to the technical field of batteries, and discloses an electric tool, which comprises a shell, a power mechanism, a first tool head and a second tool head, the shell comprises a first shell and a second shell, the second shell is movably installed on the first shell along a first direction; the power mechanism comprises a motor, a sleeve and a push rod, the motor is installed on the first shell, the sleeve is rotatably installed on the first shell; the push rod is movably installed on the sleeve along the first direction and rotates together with the sleeve; the first tool head and the second tool head are both used for connecting tool parts and are both rotatably installed on the second shell, the first tool head rotates around a first axis and drives the second tool head to rotate around a second axis, so that the electric tool can not only be applied to operation scenes in two directions of horizontal and vertical, but also can be extended or retracted with the second shell relative to the first shell to adapt to operation scenes in a long and narrow passage, improve battery assembly efficiency and reduce labor intensity.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to an electric tool. Background Technology

[0002] In the battery assembly process, screws and nuts are usually used to connect and fix two components. Compared with hand screwing, using power tools to tighten screws and nuts has the advantages of high efficiency and labor saving, precise and controllable torque, and the ability to cope with complex working conditions. It is of great necessity in improving work efficiency and quality, ensuring operational consistency, and adapting to the needs of high-intensity or precision work.

[0003] Since common power tools can only operate in one direction, different bits are used to remove and install screws and nuts. However, in some working environments and space-constrained situations, such as when the vertical space of the work point is limited or the work point is located in a narrow passage, existing power tools cannot be used and cannot meet the work requirements.

[0004] Therefore, there is an urgent need to provide a power tool to meet the operational needs of electrically assembling and disassembling fasteners in different working environments and spaces during the battery assembly process. Utility Model Content

[0005] The purpose of this application is to solve or at least alleviate some or all of the aforementioned problems. Therefore, the purpose of this application is to provide a power tool that can comprehensively meet the operational needs of electrically assembling and disassembling fasteners in different working environments and spaces during the battery assembly process, thereby improving battery assembly efficiency and reducing the labor intensity of personnel.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] This application provides an electric tool, comprising:

[0008] The housing includes a first housing and a second housing, wherein the second housing is movably mounted on the first housing along a first direction;

[0009] The power mechanism includes a motor, a sleeve, and a push rod. The motor is mounted on the first housing, and the sleeve is rotatably mounted on the first housing. The motor can drive the sleeve to rotate. The push rod is movably mounted on the sleeve along a first direction, and the push rod can rotate together with the sleeve.

[0010] The first tool head and the second tool head are both used to connect the tool. The first tool head is rotatably mounted on the second housing about a first axis, and the second tool head is rotatably mounted on the second housing about a second axis. The first tool head is fixedly connected to the push rod, and the first tool head can rotate about the first axis and drive the second tool head to rotate about the second axis. The first axis is perpendicular to the second axis.

[0011] As an optional embodiment of the power tool, the first tool head includes a first bevel gear and a first fixed seat fixed to the first bevel gear. The first bevel gear is rotatably mounted on the second housing, and the first bevel gear is fixedly connected to the push rod.

[0012] The second tool head includes a second bevel gear and a second fixed seat fixed to the second bevel gear. The second bevel gear is rotatably mounted on the second housing and meshes with the first bevel gear. Both the first fixed seat and the second fixed seat are used to connect the tool.

[0013] As an optional embodiment of the power tool, the power mechanism further includes a transmission assembly, which includes a driving wheel and a first driven wheel. The driving wheel is coaxially connected to the output end of the motor, and the first driven wheel is coaxially connected to the sleeve. The driving wheel can be driven to the first driven wheel.

[0014] As an optional embodiment of the power tool, the power mechanism further includes a lead screw and nut assembly, which includes a lead screw and a nut threadedly connected to the lead screw. The lead screw is rotatably inserted into the sleeve, and the nut is fixedly connected to the push rod.

[0015] As an optional embodiment of the power tool, the transmission assembly further includes a second driven wheel, which is coaxially connected to the lead screw. The driving wheel can be selectively connected to the second driven wheel or to the first driven wheel.

[0016] As an optional embodiment of the power tool, the power mechanism further includes a locking assembly, which includes a locking lever and a locking wheel. The locking lever is movably mounted on the first housing, with one end of the locking lever located outside the first housing and the other end of the locking lever fixedly connected to the locking wheel. The locking wheel can abut against the first driven wheel, thereby fixing the first driven wheel.

[0017] As an optional embodiment of the power tool, the driving wheel, the first driven wheel, the second driven wheel, and the locking wheel are all gears.

[0018] As an alternative to the power tool, the first housing includes a first enclosure portion and a first support portion disposed within the first enclosure portion. The first support portion has a first through hole extending in a first direction, and the sleeve is rotatably mounted in the first through hole via a first bearing.

[0019] As an alternative to the power tool, the second housing includes a second enclosure portion and a second support portion disposed within the second enclosure portion. The second support portion has a second through hole extending in a first direction, and the second enclosure portion has a third through hole arranged perpendicular to the second through hole. The first bevel gear is rotatably mounted in the second through hole via a second bearing, and the second bevel gear is rotatably mounted in the third through hole via a third bearing.

[0020] As an alternative to the power tool, the first enclosure portion has a groove extending in a first direction, and the second enclosure portion has a guide rod that slides in conjunction with the groove.

[0021] As an optional embodiment of the power tool, the number of slides is at least two, the number of guide rods on the second enclosure is the same as the number of slides, and the guide rods are arranged in a one-to-one correspondence with the slides.

[0022] The beneficial effects of this application are as follows:

[0023] The power tool provided in this application drives a first tool head to rotate around a first axis and drives a second tool head to rotate around a second axis via a power mechanism, making it suitable for both horizontal and vertical work scenarios. By movably mounting a second housing to the first housing along a first direction and a push rod to be movably mounted to the sleeve along a first direction, the first and second tool heads can extend or retract relative to the first housing with the second housing, adapting to work scenarios in narrow passages. This fully meets the operational needs of electric fastener disassembly and assembly in different working environments and spaces during battery assembly, improving battery assembly efficiency and reducing labor intensity. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0025] Figure 1 This is a structural schematic diagram of the power tool provided in one state according to an embodiment of this application.

[0026] Figure 2This is a structural schematic diagram of the power tool provided in the embodiments of this application in another state.

[0027] Figure 3 This is an exploded view of the shell provided in an embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the structure of the first shell and the second shell in cooperation provided in the embodiments of this application.

[0029] Figure 5 This is a schematic diagram of the operation of the power tool provided in the embodiment of this application in the first scenario.

[0030] Figure 6 This is a schematic diagram of the operation of the power tool provided in the embodiment of this application in a second scenario.

[0031] Figure 7 This is a schematic diagram of the operation of the power tool provided in the embodiments of this application in a third scenario.

[0032] Figure label:

[0033] 1. Shell; 11. First shell; 111. First enclosure; 1111. Slide groove; 112. First support; 1121. First through hole; 12. Second shell; 121. Second enclosure; 1211. Third through hole; 1212. Guide rod; 122. Second support; 1221. Second through hole;

[0034] 2. Power mechanism; 21. Motor; 22. Sleeve; 23. Push rod; 24. Transmission assembly; 241. Driving wheel; 242. First driven wheel; 243. Second driven wheel; 25. Locking assembly; 251. Locking lever; 252. Locking wheel;

[0035] 3. First tool head; 31. First bevel gear; 32. First fixed base;

[0036] 4. Second tool head; 41. Second bevel gear; 42. Second fixed base;

[0037] 5. First bearing;

[0038] 6. Second bearing;

[0039] 7. Third bearing. Detailed Implementation

[0040] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0041] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0042] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0043] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0044] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0045] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0046] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0047] like Figures 1 to 4 As shown, this application provides a power tool, which includes a housing 1, a power mechanism 2, a first tool head 3, and a second tool head 4. The power mechanism 2, the first tool head 3, and the second tool head 4 are all rotatably mounted on the housing 1. The first tool head 3 and the second tool head 4 are both used to connect to a tool and are arranged perpendicularly. The first tool head 3 can rotate around a first axis and drive the second tool head 4 to rotate around a second axis. The first axis is perpendicular to the second axis to meet the operation requirements in both horizontal and vertical directions. The power mechanism 2 is used to drive the first tool head 3 and the second tool head 4 to rotate, so as to drive the tool to rotate and complete the corresponding operation.

[0048] It is understood that the tools can be screwdriver bits or wrench bits, etc. Among them, screwdriver bits include, but are not limited to, flathead bits, Phillips head bits, star bits, and star bits; wrench bits include, but are not limited to, hex bits, Torx bits, and socket bits, etc., and will not be listed one by one here.

[0049] To achieve the linkage between the first tool head 3 and the second tool head 4, the first tool head 3 includes a first bevel gear 31 and a first fixed seat 32 fixed to the first bevel gear 31, and the first bevel gear 31 is rotatably mounted on the housing 1; the second tool head 4 includes a second bevel gear 41 and a second fixed seat 42 fixed to the second bevel gear 41, and the second bevel gear 41 is rotatably mounted on the housing 1 and meshes with the first bevel gear 31; both the first fixed seat 32 and the second fixed seat 42 are used to connect the tool components.

[0050] When the first bevel gear 31 rotates, the second bevel gear 41 will also rotate under the action of the first bevel gear 31. If the rotation axis of the first bevel gear 31 extends in the horizontal direction, then the rotation axis of the second bevel gear 41 extends in the vertical direction, thereby realizing operation in both horizontal and vertical directions.

[0051] To drive the first bevel gear 31 to rotate, the power mechanism 2 includes a motor 21, a sleeve 22, and a push rod 23. The motor 21 is mounted on the housing 1, the sleeve 22 is rotatably mounted on the housing 1, and the push rod 23 is mounted on the sleeve 22 and can rotate with the sleeve 22. The push rod 23 is connected to the first bevel gear 31 for transmission. The motor 21 is used to drive the sleeve 22 to rotate, which in turn drives the push rod 23 to rotate, and finally the push rod 23 drives the first bevel gear 31 to rotate. The second bevel gear 41 will rotate together with the rotation of the first bevel gear 31.

[0052] The power mechanism 2 also includes a transmission assembly 24, which includes a driving wheel 241 and a first driven wheel 242. The driving wheel 241 is coaxially connected to the output end of the motor 21, and the first driven wheel 242 is coaxially connected to the sleeve 22. The driving wheel 241 can be connected to the first driven wheel 242.

[0053] This power tool is now suitable for both horizontal and vertical work scenarios.

[0054] Continue as Figures 1 to 2 As shown, the housing 1 includes a first housing 11 and a second housing 12. The second housing 12 is movably mounted on the first housing 11 along a first direction. The motor 21 is mounted on the first housing 11. The sleeve 22 is rotatably mounted on the first housing 11. The push rod 23 is movably mounted on the sleeve 22 along the first direction, and the push rod 23 can rotate together with the sleeve 22. The first bevel gear 31 and the second bevel gear 41 are both rotatably mounted on the second housing 12.

[0055] For operation scenarios in narrow passages, the push rod 23 can be pulled out relative to the sleeve 22 (during which the second shell 12 will move synchronously relative to the first shell 11) so that the first tool head 3 and the second tool head 4 can extend forward and enter the narrow passage for operation.

[0056] In other words, the second shell 12 of the housing 1 can move relative to its first shell 11 in a first direction, and the push rod 23 can move relative to the sleeve 22 in a first direction, so that the first tool head 3 and the second tool head 4 installed on the second shell 12 can move in the first direction to adapt to channel operation scenarios of different sizes and improve the applicability of the power tool.

[0057] In one embodiment, to achieve the electric extension or retraction of the push rod 23, the power mechanism 2 further includes a lead screw and nut assembly. The lead screw and nut assembly includes a lead screw and a nut threadedly connected to the lead screw. The lead screw is rotatably inserted into the sleeve 22, and the nut is fixedly connected to the push rod 23. The motor 21 can drive the lead screw to rotate, causing the nut threadedly connected to the lead screw to move relative to the lead screw and the sleeve 22 in a first direction, thereby driving the push rod 23 to move in the first direction. It is understood that in another embodiment, the extension or retraction of the push rod 23 can also be achieved by manually pulling the second housing 12, thereby achieving the extension and retraction of the first tool head 3 and the second tool head 4 to function within narrow channels.

[0058] To achieve power transmission, the transmission assembly 24 also includes a second driven wheel 243, which is coaxially connected to the lead screw. The driving wheel 241 can be selectively connected to the second driven wheel 243 or to the first driven wheel 242. For example, when the first tool head 3 and the second tool head 4 need to extend or retract, see [reference needed]. Figure 1 The driving wheel 241 is connected to the second driven wheel 243 via a transmission. The motor 21 drives the driving wheel 241 to rotate, which in turn drives the second driven wheel 243 to rotate, thereby causing the lead screw to rotate. The nut, which is threadedly connected to the lead screw, moves relative to the lead screw and sleeve 22 in a first direction under the action of the lead screw and sleeve 22, thereby causing the first tool head 3 and the second tool head 4 to move in the first direction. For example, when it is necessary to rotate the first tool head 3 and the second tool head 4 for operation, see [reference needed]. Figure 2 The drive wheel 241 is connected to the first driven wheel 242. The motor 21 drives the drive wheel 241 to rotate, which in turn drives the first driven wheel 242 to rotate, thereby causing the sleeve 22 to rotate. The push rod 23 rotates together with the sleeve 22, thereby causing the first bevel gear 31 to rotate and driving the second bevel gear 41 to rotate, so that the first tool head 3 rotates around its axis and the second tool head 4 rotates around its axis to perform operations.

[0059] When the driving wheel 241 is connected to the second driven wheel 243, in order to fix the first driven wheel 242 and the sleeve 22 relative to the housing 1, the power mechanism 2 also includes a locking assembly 25. The locking assembly 25 includes a locking lever 251 and a locking wheel 252. The locking lever 251 is movably mounted on the first housing 11, with one end of the locking lever 251 located outside the first housing 11 and the other end of the locking lever 251 fixedly connected to the locking wheel 252. The locking wheel 252 can abut against the first driven wheel 242, thereby fixing the first driven wheel 242. At this time, the sleeve 22 is fixed relative to the housing 1. When the lead screw rotates, the sleeve 22 does not rotate, and the nut can move relative to the sleeve 22 and the lead screw in the first direction.

[0060] In one embodiment, the driving wheel 241, the first driven wheel 242, the second driven wheel 243, and the locking wheel 252 are all gears. The driving wheel 241 can mesh with the first driven wheel 242 to drive the first driven wheel 242 to rotate the sleeve 22; the driving wheel 241 can also mesh with the second driven wheel 243 to drive the second driven wheel 243 to rotate the lead screw. Since the locking wheel 252 is fixed relative to the first housing 11, when the locking wheel 252 can mesh with the first driven wheel 242, the first driven wheel 242 is also fixed relative to the housing 1, thereby fixing the sleeve 22 relative to the first housing 11.

[0061] Continue as Figure 3 Combination Figure 2 As shown, the first shell 11 includes a first enclosure portion 111 and a first support portion 112 disposed within the first enclosure portion 111. The first support portion 112 has a first through hole 1121 extending in a first direction. The sleeve 22 is rotatably mounted in the first through hole 1121 via a first bearing 5, which not only facilitates the installation of the sleeve 22 in the first shell 11, but also ensures the stability of the sleeve 22.

[0062] The second housing 12 includes a second enclosure portion 121 and a second support portion 122 disposed within the second enclosure portion 121. The second support portion 122 has a second through hole 1221 extending along a first direction. The second enclosure portion 121 has a third through hole 1211 arranged perpendicularly to the second through hole 1221. The first bevel gear 31 is rotatably mounted in the second through hole 1221 via a second bearing 6; the second bevel gear 41 is rotatably mounted in the third through hole 1211 via a third bearing 7. This arrangement not only facilitates the installation of the first bevel gear 31 and the second housing 12, but also facilitates the installation of the second bevel gear 41 and the second housing 12, making the overall structure of the power tool more compact, and also helps to improve the stability of the first bevel gear 31 and the second bevel gear 41.

[0063] In order to ensure that the second shell 12 moves stably relative to the first shell 11 along the first direction, the first enclosure 111 has a groove 1111 extending along the first direction, and the second enclosure 121 has a guide rod 1212 that slides in cooperation with the groove 1111.

[0064] In one embodiment, the number of slides 1111 is at least two, such as two, three, four, etc., and the number of guide rods 1212 on the second enclosure portion 121 is the same as the number of slides 1111, and the guide rods 1212 and slides 1111 are arranged in a one-to-one correspondence.

[0065] Therefore, the power tools provided in this application are not only applicable to both horizontal and vertical working scenarios, but also the first tool head 3 and the second tool head 4 can extend or retract to adapt to working scenarios in narrow passages. This can comprehensively meet the operational needs of electric fastener disassembly and assembly in different working environments and spaces during the battery assembly process, thereby improving battery assembly efficiency and reducing the labor intensity of personnel.

[0066] For example, such as Figure 5 As shown, this power tool is suitable for vertical work scenarios within short passageways. For example, as... Figure 6 As shown, this power tool is suitable for horizontal work scenarios within short passageways. For example, as... Figure 7 As shown, this power tool is suitable for vertical work scenarios within long passageways. It is understood that the power tool is also suitable for horizontal work scenarios within long passageways, which will not be elaborated upon here.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. A power tool, characterized in that, include: The housing (1) includes a first housing (11) and a second housing (12), wherein the second housing (12) is movably mounted on the first housing (11) along a first direction; The power mechanism (2) includes a motor (21), a sleeve (22) and a push rod (23). The motor (21) is mounted on the first housing (11), and the sleeve (22) is rotatably mounted on the first housing (11). The motor (21) can drive the sleeve (22) to rotate. The push rod (23) is movably mounted on the sleeve (22) along a first direction, and the push rod (23) can rotate together with the sleeve (22). The first tool head (3) and the second tool head (4) are both used to connect the tool. The first tool head (3) is rotatably mounted on the second housing (12) around the first axis, and the second tool head (4) is rotatably mounted on the second housing (12) around the second axis. The first tool head (3) is fixedly connected to the push rod (23), and the first tool head (3) can rotate around the first axis and drive the second tool head (4) to rotate around the second axis. The first axis is perpendicular to the second axis.

2. The power tool according to claim 1, characterized in that, The first tool head (3) includes a first bevel gear (31) and a first fixed seat (32) fixed to the first bevel gear (31). The first bevel gear (31) is rotatably mounted on the second housing (12), and the first bevel gear (31) is fixedly connected to the push rod (23). The second tool head (4) includes a second bevel gear (41) and a second fixed seat (42) fixed to the second bevel gear (41). The second bevel gear (41) is rotatably mounted on the second housing (12) and meshes with the first bevel gear (31). Both the first fixed seat (32) and the second fixed seat (42) are used to connect the tool.

3. The power tool according to claim 2, characterized in that, The power mechanism (2) further includes a transmission assembly (24), which includes a driving wheel (241) and a first driven wheel (242). The driving wheel (241) is coaxially connected to the output end of the motor (21), and the first driven wheel (242) is coaxially connected to the sleeve (22). The driving wheel (241) can be connected to the first driven wheel (242) in a transmission manner.

4. The power tool according to claim 3, characterized in that, The power mechanism (2) further includes a lead screw and nut assembly, which includes a lead screw and a nut threadedly connected to the lead screw. The lead screw is rotatably inserted into the sleeve (22), and the nut is fixedly connected to the push rod (23).

5. The power tool according to claim 4, characterized in that, The transmission assembly (24) further includes a second driven wheel (243), which is coaxially connected to the lead screw. The driving wheel (241) can be selectively connected to the second driven wheel (243) or to the first driven wheel (242).

6. The power tool according to claim 5, characterized in that, The power mechanism (2) further includes a locking assembly (25), which includes a locking lever (251) and a locking wheel (252). The locking lever (251) is movably mounted on the first housing (11). One end of the locking lever (251) is located outside the first housing (11), and the other end of the locking lever (251) is fixedly connected to the locking wheel (252). The locking wheel (252) can abut against the first driven wheel (242), thereby fixing the first driven wheel (242).

7. The power tool according to any one of claims 2-6, characterized in that, The first shell (11) includes a first enclosure portion (111) and a first support portion (112) disposed within the first enclosure portion (111). The first support portion (112) has a first through hole (1121) extending in a first direction. The sleeve (22) is rotatably mounted in the first through hole (1121) via a first bearing (5).

8. The power tool according to claim 7, characterized in that, The second shell (12) includes a second enclosure portion (121) and a second support portion (122) disposed within the second enclosure portion (121). The second support portion (122) has a second through hole (1221) extending in a first direction. The second enclosure portion (121) has a third through hole (1211) arranged perpendicularly to the second through hole (1221). The first bevel gear (31) is rotatably mounted in the second through hole (1221) via a second bearing (6). The second bevel gear (41) is rotatably mounted in the third through hole (1211) via a third bearing (7).

9. The power tool according to claim 8, characterized in that, The first enclosure portion (111) has a groove (1111) extending in a first direction, and the second enclosure portion (121) has a guide rod (1212) that slides in cooperation with the groove (1111).

10. The power tool according to claim 9, characterized in that, The number of the slide grooves (1111) is at least two, and the number of guide rods (1212) on the second enclosure (121) is the same as the number of slide grooves (1111), and the guide rods (1212) are arranged in a one-to-one correspondence with the slide grooves (1111).

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