A mouse

Abstract

This invention provides a mouse, comprising a mouse body, an upper shell, and a pop-up mechanism. The upper shell covers the mouse body. Further, the pop-up mechanism includes a magnetic sheet with a first clearance hole, a driving assembly, a first magnet, and a second magnet. Specifically, the first magnet and the second magnet are located on opposite sides of the magnetic sheet with their like poles facing each other, and are respectively fixed to the mouse body and the upper shell. By driving the magnetic sheet from a first position to a second position through the driving assembly, the first clearance hole exposes the first and second magnets, causing the second magnet to open the upper shell under the action of a repulsive force. Thus, the mouse assists the user in opening the upper shell, making the operation easy and convenient.

Description

Technical Field

[0001] This invention relates to the field of mouse structure design technology, and in particular to a mouse. Background Technology

[0002] With the development of technology, wireless mice, which offer greater convenience, have become the choice for many people. Some of these mice have an internal battery compartment, requiring the mouse shell to be opened to replace the battery. Common mouse shells require manual prying or a spring-loaded mechanism to pop open, which is inconvenient. Since conventional battery shell pop-out methods rely on springs or clips, this application provides a novel battery shell pop-out method. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a mouse that helps users easily open the casing.

[0004] This invention provides a mouse, comprising: a mouse body; an upper shell covering the mouse body; and a pop-out mechanism, the pop-out mechanism comprising a magnetic guide plate, a driving assembly, a first magnet fixed to the mouse body, and a second magnet fixed to the upper shell. The magnetic guide plate is located above the first magnet and has a first clearance hole, and the second magnet is located above the magnetic guide plate and has the same pole opposite to the first magnet. The driving assembly drives the magnetic guide plate to move between a first position and a second position. In the first position, the magnetic guide plate blocks the first magnet and the second magnet. In the second position, the first clearance hole exposes the first magnet and the second magnet, so that the second magnet, under the action of a repulsive force, drives the upper shell to detach from the mouse body.

[0005] Furthermore, the driving component includes: a connector connected to the magnetic sheet; and a button movably disposed on the mouse body and configured to drive the connector to move and cause the connector to move in conjunction with the magnetic sheet.

[0006] Furthermore, the upper housing extends downward from the bottom to form a buckle; the connector has a snap fastener that matches the buckle.

[0007] Furthermore, the end of the buckle is formed as a downwardly sloping surface.

[0008] Furthermore, the upper surface of the mouse body is recessed to form a relief groove, and the side wall of the relief groove is provided with a second relief hole; the buckle is configured to extend into the relief groove; the latch is configured to cooperate with the buckle through the second relief hole.

[0009] Furthermore, the upper surface of the connector is recessed to form a receiving groove; the magnetic sheet is disposed within the receiving groove.

[0010] Furthermore, the connector is provided with a through hole penetrating the bottom of the receiving groove.

[0011] Furthermore, the pop-up mechanism also includes a support member, which is fixedly mounted on the mouse body; wherein the first magnet is mounted on the support member.

[0012] Furthermore, the drive assembly also includes a reset member, the two ends of which abut against the support member and the connector, respectively.

[0013] Furthermore, the connector is provided with a positioning post; the reset member is sleeved on the positioning post.

[0014] Furthermore, a receiving platform is formed on the support member; the first magnet is fixed to the receiving platform.

[0015] Furthermore, the mouse body is provided with a third clearance hole that matches the button; the upper shell is provided with a fourth clearance hole that matches the button.

[0016] Furthermore, the ejection mechanism also includes a non-magnetic support sheet, which is attached to the magnetic sheet.

[0017] Furthermore, the mouse body is provided with a fifth clearance hole; the upper shell extends downward from the bottom to form a receiving portion with a lower opening, the receiving portion extending into the fifth clearance hole; the second magnet is fixed to the receiving portion.

[0018] Furthermore, the mouse body includes: a lower shell; and a middle frame, the middle frame being disposed on the lower shell; wherein, the middle frame extends downward from the bottom to form a mounting bracket, and the driving component is disposed on the mounting bracket.

[0019] The mouse provided in this embodiment of the invention includes a mouse body, an upper shell, and a pop-up mechanism. The upper shell covers the mouse body. Further, the pop-up mechanism includes a magnetic sheet with a first clearance hole, a driving assembly, a first magnet, and a second magnet. Specifically, the first magnet and the second magnet are located on opposite sides of the magnetic sheet with their like poles facing each other, and are respectively fixed to the mouse body and the upper shell. By driving the magnetic sheet from a first position to a second position through the driving assembly, the first clearance hole exposes the first and second magnets, thereby causing the second magnet to open the upper shell under the action of a repulsive force. Thus, the mouse assists the user in opening the upper shell, making the operation easy and convenient. Attached Figure Description

[0020] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of a mouse provided in an embodiment of the present invention;

[0022] Figure 2 This is an exploded view of a mouse provided in an embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional schematic diagram of a mouse provided in an embodiment of the present invention;

[0024] Figure 4 This is a partially enlarged schematic diagram of a mouse cross-section provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of an upper shell provided in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of a middle frame provided in an embodiment of the present invention;

[0027] Figure 7 This is a structural schematic diagram of a middle frame from another perspective provided in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of a connector provided in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of a support member provided in an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of a magnetic conductive sheet and a non-magnetic support sheet provided in an embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram of the structure of a lower shell provided in an embodiment of the present invention;

[0032] Figure 12 This is a schematic diagram of a magnetic conductive sheet in the first position according to an embodiment of the present invention;

[0033] Figure 13 This is a schematic diagram of a magnetic conductive sheet in the second position according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Lower shell; 11-Annular groove; 2-Middle frame; 21-Allowing groove; 211-Second clearance hole; 22-Third clearance hole; 23-Fifth clearance hole; 24-Mounting bracket; 3-Upper shell; 31-Snap ring; 32-Fourth clearance hole; 33-Accommodation part; 4-Pop-up mechanism; 41-Magnetic guide plate; 411-First clearance hole; 42-Drive assembly; 421-Connector; 4211-Snap buckle; 4212-Accommodation groove; 4213-Through hole; 4214-Positioning post; 4215-Limiting groove; 422-Button; 423-Reset component; 43-First magnet; 44-Second magnet; 45-Support component; 451-Accommodation platform; 452-Sixth clearance hole; 46-Non-magnetic support plate; 5-Scroll wheel; 6-Wear-resistant pad; A-Mouse body. Detailed Implementation

[0036] The present invention is described below based on embodiments, but the invention is not limited to these embodiments. In the detailed description of the invention below, certain specific details are described in detail. Those skilled in the art will fully understand the invention even without these details. To avoid obscuring the essence of the invention, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0037] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0038] Unless the context explicitly requires it, words such as "including" or "contains" in the instruction manual should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0039] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] like Figure 1-3As shown, the mouse provided in this embodiment includes a mouse body A, an upper shell 3, and a pop-up mechanism 4. The mouse body A has an internal cavity to accommodate various electronic components. In one embodiment, the mouse body A includes a lower shell 1 and a middle frame 2. The lower shell 1 is formed in a basin shape, and the middle frame 2 covers the lower shell 1 to form a cavity for housing various electronic components. The mouse also includes commonly used components such as a scroll wheel 5. Furthermore, the upper shell 3 matches the shape of the middle frame 2 and covers the middle frame 2 to enclose the entire mouse structure, for example, by enclosing the battery compartment (not shown in the figure) through the upper shell 3. In this embodiment, the upper shell 3 pops up via the pop-up mechanism 4, allowing for convenient maintenance, battery replacement, and other operations.

[0041] like Figure 2 As shown, the pop-out mechanism 4 includes a magnetic guide plate 41, a drive assembly 42, a first magnet 43, and a second magnet 44. Among these, combined with... Figure 2-4 As shown, the first magnet 43 is fixed to the middle frame 2 and located below the magnetic guide plate 41, while the second magnet 44 is fixed to the upper housing 3 and located above the magnetic guide plate 41. It should be noted that the first magnet 43 and the second magnet 44 have the same poles facing each other. A first clearance hole 411 is provided on the magnetic guide plate 41 located between the first magnet 43 and the second magnet 44. The size of the first clearance hole 411 can be set as needed. Furthermore, the magnetic guide plate 41 is connected to the driving assembly 42, allowing the driving assembly 42 to drive the magnetic guide plate 41 to move between a first position and a second position (in conjunction with...). Figure 12-13 (As shown).

[0042] Combination Figure 6-7 As shown, in one embodiment, the middle frame 2 extends downward from the bottom to form a mounting bracket 24, and the drive assembly 42 is disposed on the mounting bracket 24. That is, the drive assembly 42 is disposed on the middle frame 2 via the mounting bracket 24.

[0043] It should be noted that the magnetic conductive sheet 41 can be made of metallic magnetic materials such as soft iron and carbon steel, or it can be made of ferrites such as manganese-zinc ferrite and barium ferrite. Therefore, combined with... Figure 3-4 As shown, when the upper housing 3 is in the closed state, the magnetic sheet 41 is in the first position (e.g., Figure 12 As shown, the magnetic conductive sheet 41 blocks the first magnet 43 and the second magnet 44, and the first clearance hole 411 is located to the side of the first magnet 43 and the second magnet 44, that is, the body of the magnetic conductive sheet 41 is located in the middle of the first magnet 43 and the second magnet 44. At this time, both the first magnet 43 and the second magnet 44 generate an attractive force with the magnetic conductive sheet 41, which not only eliminates the repulsive force between the first magnet 43 and the second magnet 44, but also allows the second magnet 44 to pull the upper housing 3 to be attracted, thus increasing the stability of the assembly of the upper housing 3 to a certain extent.

[0044] On the other hand, such as Figure 13 As shown, when the driving assembly 42 drives the magnetic plate 41 to the second position, the first clearance hole 411 exposes the first magnet 43 and the second magnet 44. That is, when the first clearance hole 411 is located between the first magnet 43 and the second magnet 44, the second magnet 44 is again subjected to repulsive force, causing the upper shell 3 to spring up and detach from the middle frame 2. At this time, the upper shell 3 is in the open state. Therefore, the mouse user only needs to operate the driving assembly 42 to open the upper shell 3 under the magnetic force of the magnets, thereby enabling subsequent maintenance, battery replacement, and other work.

[0045] like Figure 2-4 As shown, in one embodiment, the driving component 42 includes a connector 421 and a button 422. The connector 421 is connected to the magnetic sheet 41, and the button 422 is movably disposed on the middle frame 2 and configured to drive the connector 421 to move. Specifically, one end of the button 422 protrudes from the outer surface of the mouse (e.g., ...). Figure 1 As shown, when the mouse user presses button 422 inward, button 422 pushes connector 421 to move. Connector 421 then moves magnetic sheet 41, thereby pushing magnetic sheet 41 to move. This allows the first clearance hole 411 to be positioned between the first magnet 43 and the second magnet 44, causing the second magnet 44 to pull the upper shell 3 away from the middle frame 2 under the action of repulsive force. Thus, the mouse user only needs to press button 422 to easily open the upper shell 3 with the assistance of the first magnet 43 and the second magnet 44.

[0046] like Figure 8 As shown, in one embodiment, the connector 421 has a limiting groove 4215 at the end facing the button 422. Specifically, the button 422 is connected to the connector 421 through the limiting groove 4215, thereby ensuring the uniformity of the movement path of each component and helping to enhance the structural reliability of the drive assembly 42.

[0047] Furthermore, combined Figure 5-7 As shown, the middle frame 2 has a third clearance hole 22 that matches the button 422, and the upper housing 3 has a fourth clearance hole 32 that matches the button 422. It is easy to understand that the matching positions of the third clearance hole 22 and the fourth clearance hole 32 allow the button 422 to be exposed and moved through both holes, facilitating the mouse user to press the button 422 and easily open the upper housing 3 with the assistance of the first magnet 43 and the second magnet 44.

[0048] like Figure 4 and Figure 5As shown, in one embodiment, the upper housing 3 extends downward from the bottom to form a retaining ring 31, while the connecting member 421 has a latch 4211 that matches the retaining ring 31. Specifically, the latch 4211 is formed by extending the main body of the connecting member 421 toward the button 422. When the upper housing 3 is in the closed state, the latch 4211 is engaged with the retaining ring 31, preventing the upper housing 3 from detaching from the middle frame 2. When the mouse user presses the button 422, the connecting member 421 moves away from the retaining ring 31, causing the latch 4211 to disengage from the retaining ring 31, thus releasing the locking effect on the upper housing 3; at the same time, the magnetic sheet 41 moves under the action of the connecting member 421, so that the first clearance hole 411 is located in the middle position of the first magnet 43 and the second magnet 44, thereby enabling the second magnet 44 to drive the upper housing 3 to spring up and detach from the middle frame 2. It should be noted that in this embodiment, the buckle 31 is fastened to the buckle 4211; as an optional embodiment, other structures such as hooks can also be formed at the bottom of the upper housing 3 to cooperate with the buckle 4211.

[0049] Furthermore, such as Figure 6 As shown, the upper surface of the middle frame 2 is recessed to form a relief groove 21, and the side wall of the relief groove 21 is provided with a second relief hole 211. Thus, when the upper shell 3 is closed, the retaining ring 31 can extend into the relief groove 21. It is easy to understand that by setting the relief groove 21, the required accommodating space for the retaining ring 31 is met, while also protecting the electronic components inside the mouse. Furthermore, the latch 4211 is configured to engage with the retaining ring 31 through the second relief hole 211. Specifically, when the mouse user drives the connector 421 via the button 422, the latch 4211 moves through the second relief hole 211, allowing the latch 4211 to disengage from or engage with the retaining ring 31.

[0050] like Figure 8 As shown, in one embodiment, a receiving groove 4212 is recessed on the upper surface of the connector 421. It is readily understood that the shape and dimensions of the receiving groove 4212 match those of the magnetic sheet 41, which is disposed within the receiving groove 4212. Thus, when the mouse user drives the connector 421 via the button 422, the magnetic sheet 41 within the receiving groove 4212 moves with the connector 421.

[0051] Furthermore, such as Figure 8 As shown, the connector 421 has a through hole 4213 that penetrates the bottom of the receiving groove 4212. When the magnetic sheet 41 is placed in the receiving groove 4212, the first magnet 43 can be placed below the magnetic sheet 41 through the through hole 4213. That is to say, the first magnet 43 and the magnetic sheet 41 are not blocked, which helps to ensure the effect of the magnetic force.

[0052] Combination Figure 2-4 As shown, in one embodiment, the pop-out mechanism 4 further includes a support member 45. Specifically, the support member 45 is fixedly mounted on the middle frame 2, and the first magnet 43 is mounted on the support member 45. Thus, the support member 45 is used to fix the first magnet 43 to the middle frame 2.

[0053] Furthermore, such as Figure 9 As shown, a receiving platform 451 is formed on the support member 45, and the first magnet 43 is fixed on the receiving platform 451. It should be noted that the receiving platform 451 is arranged towards the connector 421 and extends into the through hole 4213. Thus, the first magnet 43 fixed on the receiving platform 451 can be positioned below the magnetic conductive sheet 41. As an optional embodiment, a receiving cavity with an opening at the top is formed on the receiving platform 451, and the first magnet 43 is positioned in the receiving cavity through the opening.

[0054] Combination Figure 2-4 As shown, in one embodiment, the drive assembly 42 further includes a reset member 423. Specifically, the two ends of the reset member 423 abut against the support member 45 and the connector 421, respectively. It should be noted that the reset member 423 includes a spring or an elastic member made of an elastic material such as rubber. In this embodiment, when the mouse user presses the button 422, it drives the connector 421 to move, causing the latch 4211 to disengage from the retaining ring 31 and the first clearance hole 411 to be located in the middle position between the first magnet 43 and the second magnet 44. At the same time, the movement of the connector 421 causes the reset member 423 to be compressed. When the mouse user releases the button 422, the connector 421 can drive the button 422 back to its initial position under the elastic force of the reset member 423.

[0055] like Figure 4 and Figure 8 As shown, in one embodiment, the end of the latch 4211 is formed as a downwardly sloping surface. Specifically, when the user of the mouse needs to close the upper shell 3, the connector 421 has returned to its initial position due to the action of the reset member 423. At this time, the user presses the upper shell 3 downwards, and the retaining ring 31 abuts against the sloping surface at the end of the latch 4211, thereby driving the connector 421 to move away from the button 422 through the sloping surface. When the upper shell 3 is fully closed, the retaining ring 31 no longer applies force to the sloping surface, allowing the connector 421 to return to its initial position under the action of the reset member 423, thus engaging the latch 4211 with the retaining ring 31. Therefore, the user only needs to press down on the upper shell 3 to close it, making the operation simple and convenient.

[0056] Furthermore, such as Figure 8As shown, the connector 421 is provided with a positioning post 4214, and the reset member 423 is sleeved on the positioning post 4214. It is easily understood that the positioning post 4214 prevents the reset member 423 from shifting position when compressed or springing back, thereby ensuring the continuous normal operation of the drive assembly 42. As an optional embodiment, the support member 45 is provided with a sixth clearance hole 452, and the position and size of the sixth clearance hole 452 match that of the positioning post 4214, so that when the connector 421 moves towards the support member 45 driven by the button 422, the positioning post 4214 can pass through the sixth clearance hole 452, thereby ensuring the normal operation of the drive assembly 42.

[0057] Combination Figure 2-4 as well as Figure 10 As shown, in one embodiment, the pop-out mechanism 4 further includes a non-magnetic support sheet 46. Specifically, the non-magnetic support sheet 46 is made of a non-magnetic alloy or other non-magnetic material with a certain strength. The non-magnetic support sheet 46 is attached to the magnetic conductive sheet 41 to provide support for the magnetic conductive sheet 41. It is easily understood that the non-magnetic support sheet 46 does not affect the magnetic force between the first magnet 43 and the second magnet 44.

[0058] Combination Figure 6-7 As shown, in one embodiment, the middle frame 2 is provided with a fifth clearance hole 23. Meanwhile, the upper housing 3 extends downward from the bottom to form a receiving portion 33 with an opening at the lower end. The second magnet 44 is fixed by being embedded in the receiving portion 33 through the opening. It should be noted that the position of the fifth clearance hole 23 matches the position of the receiving platform 451. When the upper housing 3 is in the closed state, the receiving portion 33 extends into the fifth clearance hole 23, so that the second magnet 44 is positioned above the magnetic conductive sheet 41 and opposite to the first magnet 43.

[0059] Combination Figure 2 and Figure 11 As shown, in one embodiment, the mouse further includes a wear-resistant pad 6. Specifically, the wear-resistant pad 6 is disposed at the bottom of the lower housing 1, and the mouse slides along the wear-resistant pad 6. Further, the wear-resistant pad 6 is annular, and a corresponding annular groove 11 is provided at the bottom of the lower housing 1. That is, the wear-resistant pad 6 is embedded in the annular groove 11.

[0060] The mouse provided in this embodiment of the invention includes a lower shell, a middle frame, an upper shell, and a pop-up mechanism. The middle frame covers the lower shell, and the upper shell covers the middle frame. Further, the pop-up mechanism includes a magnetic sheet with a first clearance hole, a driving assembly, a first magnet, and a second magnet. Specifically, the first magnet and the second magnet are located on opposite sides of the magnetic sheet with their like poles facing each other, and are respectively fixed to the middle frame and the upper shell. By driving the magnetic sheet from a first position to a second position through the driving assembly, the first clearance hole exposes the first and second magnets, thereby causing the second magnet to open the upper shell under the action of a repulsive force. Thus, the mouse assists the user in opening the upper shell, making the operation easy and convenient.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mouse, characterized in that, The mouse includes: Mouse body (A); Upper housing (3), the upper housing (3) covering the mouse body (A); and The pop-up mechanism (4) includes a magnetic guide plate (41), a drive assembly (42), a first magnet (43) fixed on the mouse body (A), and a second magnet (44) fixed on the upper shell (3). The magnetic guide plate (41) is located above the first magnet (43) and has a first clearance hole (411). The second magnet (44) is located above the magnetic guide plate (41) and has the same pole opposite to the first magnet (43). The driving component (42) drives the magnetic plate (41) to move between a first position and a second position. In the first position, the magnetic plate (41) blocks the first magnet (43) and the second magnet (44). In the second position, the first clearance hole (411) exposes the first magnet (43) and the second magnet (44) so ​​that the second magnet (44) drives the upper shell (3) to detach from the mouse body (A) under the action of repulsive force. The upper housing (3) extends downward from the bottom to form a buckle (31), and the drive assembly (42) has a buckle (4211) that matches the buckle (31). The buckle (31) and the buckle (4211) are fastened together to close the upper housing (3).

2. The mouse according to claim 1, characterized in that, The driving component (42) includes: Connector (421), which is connected to the magnetic sheet (41); and A button (422) is movably disposed on the mouse body (A) and configured to drive the connector (421) to move and to cause the connector (421) to move in conjunction with the magnetic sheet (41).

3. The mouse according to claim 2, characterized in that, The buckle (4211) is formed on the connector (421).

4. The mouse according to claim 3, characterized in that, The end of the buckle (4211) is formed as a downwardly sloping surface.

5. The mouse according to claim 3, characterized in that, The upper surface of the mouse body (A) is recessed to form a relief groove (21), and the side wall of the relief groove (21) is provided with a second relief hole (211). The buckle (31) is configured to extend into the clearance groove (21); The buckle (4211) is configured to engage with the buckle (31) via the second clearance hole (211).

6. The mouse according to claim 2, characterized in that, The upper surface of the connector (421) is recessed to form a receiving groove (4212). The magnetic sheet (41) is disposed in the receiving groove (4212).

7. The mouse according to claim 6, characterized in that, The connector (421) is provided with a through hole (4213) that penetrates the bottom of the receiving groove (4212).

8. The mouse according to claim 2, characterized in that, The pop-out mechanism (4) also includes: Support member (45), the support member (45) is fixedly mounted on the mouse body (A); The first magnet (43) is disposed on the support member (45).

9. The mouse according to claim 8, characterized in that, The drive component (42) further includes: The reset member (423) has two ends that abut against the support member (45) and the connector (421), respectively.

10. The mouse according to claim 9, characterized in that, The connector (421) is provided with a positioning post (4214). The reset component (423) is sleeved on the positioning post (4214).

11. The mouse according to claim 8, characterized in that, A receiving platform (451) is formed on the support member (45). The first magnet (43) is fixed on the receiving platform (451).

12. The mouse according to claim 2, characterized in that, The mouse body (A) is provided with a third clearance hole (22) that matches the button (422); The upper housing (3) is provided with a fourth clearance hole (32) that matches the button (422).

13. The mouse according to any one of claims 1-12, characterized in that, The pop-out mechanism (4) also includes: A non-magnetic support sheet (46) is attached to the magnetic sheet (41).

14. The mouse according to any one of claims 1-12, characterized in that, The mouse body (A) is provided with a fifth clearance hole (23); The upper housing (3) extends downward from the bottom to form a receiving portion (33) with a lower opening, and the receiving portion (33) extends into the fifth clearance hole (23); The second magnet (44) is fixed to the receiving part (33).

15. The mouse according to any one of claims 1-12, characterized in that, The mouse body (A) includes: Lower housing (1); and The middle frame (2) is mounted on the lower housing (1); The middle frame (2) extends downward from the bottom to form a mounting bracket (24), and the drive assembly (42) is disposed on the mounting bracket (24).

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