A base cover switch structure

Abstract

The application discloses a bottom cover switch structure and belongs to the technical field of medical equipment. In order to solve the problems that switches generally adopt a push switch, a button switch, a button switch and the like in the process of changing a battery of an electric tool, the switches are small in size, frequent pressing can make a metal spring fatigue and lose elasticity and thus fail, and a touch switch cannot independently generate a function, and the switches are poor in durability and convenience during the process of changing the battery, a connecting protrusion is arranged at the middle part of the top surface of a handle sleeve, one side of the handle sleeve is embedded with a base, a concave connector is arranged at the other side of the upper end of the base, a middle rotating block is movably arranged at the middle part of the lower end of one side of the base, a switch is fixedly arranged on the middle part of one side of the middle rotating block, and a lock tongue is arranged at the middle part of the lower end between a cover plate and the base. The bottom cover switch structure is more efficient, convenient, durable and controllable, and facilitates the disassembly and assembly of the battery.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a bottom cover switch structure. Background Technology

[0002] With the changing social environment and improved living standards, orthopedic surgery is receiving increasing attention from doctors and patients, as well as from medical institutions. As the aging population grows, the proportion of bone and joint reconstruction and revision surgeries in orthopedic procedures is increasing, leading to higher demands on the quality of power tools. Most power tools rely on batteries for power, and these batteries are designed to be replaceable. When changing batteries, the switches used in these mechanisms are typically toggle switches, push-button switches, or rotary switches. These are small, and frequent pressing can cause the metal springs to fatigue and lose elasticity, leading to failure. Touch switches cannot function independently and are not durable or convenient during battery changes.

[0003] To address the above issues, a bottom cover switch structure is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a bottom cover switch structure. Using this device, the problem in the background is that when changing batteries with power tools, switches such as toggle switches, push-button switches, and toggle switches are generally small in size. Frequent pressing will cause the metal spring to fatigue and lose elasticity, resulting in failure. Tactile switches cannot function independently and are not durable or convenient during battery changing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bottom cover switch structure, including a handle sleeve, a connecting protrusion provided at the center of the top surface of the handle sleeve, a base embedded in one side of the handle sleeve, a concave connector provided at the other end of the upper end of the base, the concave connector being movably mounted on the connecting protrusion, a rotating block movably embedded in the center of the lower end of one side of the base, a switch fixedly mounted on the outer wall of the center of one side of the rotating block, a cover plate fixedly mounted on the outer wall of the inner side of the base, a small cover plate provided at the center of the middle position between the cover plate and the base, the small cover plate being located at the center of the cover plate, a locking tongue provided at the center of the lower end between the cover plate and the base, the locking tongue being fixedly connected to the rotating block by screws, a locking piece provided in the inner cavity of the lower end of the base, the locking piece being located directly above the rotating block, and elastic top blocks respectively installed on both sides of the center of the inner side of the base; an arc-shaped locking groove is provided on the bottom surface of the center of one side of the inner cavity of the handle sleeve.

[0006] Furthermore, connecting shafts are fixedly installed on the outer walls of the middle sections on both sides of the connecting protrusion, and torsion springs are respectively sleeved on the outer periphery of the connecting shafts.

[0007] Furthermore, an embedding groove is provided on the outer wall of the lower middle part of one side of the base, and a circular rotating groove is provided on the inner wall of the lower middle part of the inner cavity of the embedding groove. An arc-shaped limiting groove is provided on the inner wall of the upper end of the inner cavity of the embedding groove. A bottom double through groove is provided on the outer wall of the lower inner side of the base. An installation inner groove is provided in the inner cavity of the lower middle part of the base, and the installation inner groove is connected to the circular rotating groove. Receiving grooves are provided on the outer walls of both sides of the inner middle part of the base. An inner sliding groove is provided in the inner cavity of one side of the upper end of the base, and a bottom through hole is provided on the bottom surface of the inner cavity of the inner sliding groove, and the bottom through hole is connected to the arc-shaped limiting groove. A spring-loaded inner groove is provided on the inner wall of the upper end of the inner cavity of the inner sliding groove, and a torsion spring is provided in the spring-loaded inner groove.

[0008] Furthermore, two snap-fit ​​grooves are provided on the outer periphery of the rotating block. The snap-fit ​​component includes a steel ball and a connecting spring installed on the top of the steel ball. The steel ball is elastically slidably installed in the inner cavity of the mounting groove through the connecting spring, and the lower end of the steel ball is snap-fitted in the snap-fit ​​groove.

[0009] Furthermore, the elastic top block includes a top block body and a return spring mounted on the top block body, and the top block body is elastically slidably mounted in the inner cavity of the receiving groove by means of the return spring.

[0010] Furthermore, a spring-loaded reset component is installed in the inner cavity of the upper side of the base. The spring-loaded reset component includes an upper push rod and a rotating sleeve movably installed inside the inner cavity of the spring-loaded groove. The upper push rod is slidably installed in the inner groove. A double-grooved roller is movably installed in the middle of the inner cavity of the spring-loaded groove, and the double-grooved roller is connected to the rotating sleeve by a transmission belt. A pull rope is wound around the outer periphery of the other side of the double-grooved roller. A support roller is movably installed on the lower inner wall of the outer side of the inner cavity of the spring-loaded groove, and one end of the pull rope passes around the support roller and is connected to the inner outer wall of the upper end of the upper push rod.

[0011] Furthermore, the upper push rod includes a middle push slider and a side protrusion fixedly installed on the outer wall of one side of the lower end of the middle push slider. An upper abutment is fixedly installed on the bottom surface of the side protrusion, and the other side surface of the upper abutment is inclined. The upper abutment is slidably installed in the bottom through hole, and the lower end of the upper abutment protrudes into the arc-shaped limiting groove. The middle push slider is elastically slidably installed in the inner slide groove by a compression spring.

[0012] Furthermore, the rotating sleeve includes a rotating sleeve body and an H-shaped roller fixedly installed on the outer wall of the middle part of one side of the rotating sleeve body. The H-shaped roller is movably installed on the inner wall of the inner cavity of the spring groove. A matching groove is provided on the outer wall of the middle part of the other side of the rotating sleeve body. The matching groove matches the torsion spring, and the torsion spring is embedded in the matching groove.

[0013] Furthermore, the H-shaped roller is connected to the double-groove roller via a transmission belt, and the diameter of the H-shaped roller is set to be smaller than that of the double-groove roller.

[0014] Furthermore, one end of the pull rope is connected and installed on the outer peripheral wall of the double groove roller, and the other end of the pull rope is connected and installed with a connecting block, which is fixedly installed on the inner outer wall of the upper end of the middle push slider.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: When the operator needs to replace the battery, the front end of the switch can be moved by finger, causing the front end of the switch to move to one side of the arc-shaped limiting groove. During this process, the locking tongue can be rotated by the central rotating block, thereby causing the lower end of the locking tongue to move out of the arc-shaped locking groove, thus opening the base and removing and installing the battery. When it is necessary to install the base on the handle sleeve, the front end of the switch can be moved, and the lock tongue can be reset by the switch, thus locking the base on the handle sleeve. This setting is more efficient, convenient, durable, and controllable, which not only facilitates the removal and installation of the battery, but also improves the efficiency of the medical drill. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the back of the handle sleeve of the present invention;

[0018] Figure 3 This is a top cross-sectional view of the upper part of the handle sleeve of the present invention;

[0019] Figure 4 This is a top cross-sectional view of the middle part of the handle sleeve of the present invention;

[0020] Figure 5 This is a schematic cross-sectional view of the overall back portion of the present invention;

[0021] Figure 6 This is a schematic side cross-sectional view of the entire invention;

[0022] Figure 7 This is a schematic cross-sectional view of the springback inner groove of the present invention;

[0023] Figure 8 This is a schematic diagram of the connection position between the connecting shaft and the torsion spring of the present invention;

[0024] Figure 9 This is a three-dimensional structural diagram of the connection between the rotating sleeve and the double-groove roller of the present invention;

[0025] Figure 10 This is a schematic diagram of the planar structure of the matching slot of the present invention;

[0026] Figure 11 This is a schematic diagram of the three-dimensional structure of the upper push rod of the present invention.

[0027] In the diagram: 1. Handle sleeve; 11. Arc-shaped snap-fit ​​groove; 2. Connecting protrusion; 21. Connecting shaft; 22. Torsion spring; 3. Base; 31. Embedded groove; 32. Circular rotating groove; 33. Arc-shaped limiting groove; 34. Bottom double through groove; 35. Mounting inner groove; 36. Retraction groove; 37. Bottom through hole; 38. Inner sliding groove; 39. Rebound inner groove; 4. Concave connector; 5. Central rotating block; 51. Snap-fit ​​groove; 6. Switch; 7. Locking tongue; 8. Screw; 9. Clip; 91. Steel ball; 92. Connecting spring ; 10. Elastic top block; 101. Top block body; 102. Return spring; 20. Cover plate; 30. Small cover plate; 40. Spring-up return component; 401. Upper push rod; 4011. Middle push slider; 4012. Side protrusion; 4013. Upper abutment block; 4014. Compression spring; 402. Rotating sleeve; 4021. Rotating sleeve body; 4022. H-shaped roller; 4023. Matching groove; 403. Double groove roller; 404. Transmission belt; 405. Support roller; 406. Pull rope; 4061. Connecting block. Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To address the technical issues encountered when changing batteries in power tools, such as the common use of toggle switches, push-button switches, and rotary switches, which are small in size and prone to fatigue and loss of elasticity in their metal contacts due to frequent pressing, and the fact that tactile switches cannot function independently and are generally not durable or convenient during battery changes, a solution is needed. Figures 1-6 As shown, the following preferred technical solutions are provided:

[0030] A bottom cover switch structure includes a handle sleeve 1. A connecting protrusion 2 is provided at the center of the top surface of the handle sleeve 1. A base 3 is embedded in one side of the handle sleeve 1, and a concave connector 4 is provided at the other end of the upper part of the base 3. The concave connector 4 is movably mounted on the connecting protrusion 2. A central rotating block 5 is movably embedded in the center of the lower end of one side of the base 3. A switch 6 is fixedly mounted on the outer wall of the center of one side of the central rotating block 5. Arc-shaped recesses are provided on both sides of the front end of the switch 6 to facilitate the operator's gripping and pushing of the switch 6. A cover plate 20 is fixedly mounted on the inner outer wall of the base 3. A small cover plate 30 is provided at the middle position between the cover plate 20 and the base 3, and the small cover plate 30 is located at the middle position of the cover plate 20. A locking tongue 7 is provided at the lower middle position between the cover plate 20 and the base 3, and the locking tongue 7 is fixedly connected to the central rotating block 5 by screws 8. A locking piece 9 is provided in the lower middle inner cavity of the base 3, and the locking piece 9 is located directly above the central rotating block 5. Elastic top blocks 10 are installed on both sides of the middle inner side of the base 3. An arc-shaped locking groove 11 is provided on the bottom surface of the middle side of one side of the inner cavity of the handle sleeve 1. The lower end of the locking tongue 7 is inserted into and locked in the arc-shaped locking groove 11.

[0031] An embedding groove 31 is provided on the outer wall of the lower middle part of one side of the base 3, and a circular rotating groove 32 is provided on the inner wall of the lower middle part of the inner cavity of the embedding groove 31. An arc-shaped limiting groove 33 is provided on the inner wall of the upper end of the inner cavity of the embedding groove 31. A bottom double through groove 34 is provided on the outer wall of the lower inner side of the base 3, and the locking tongue 7 is movably installed in the bottom double through groove 34. An installation inner groove 35 is provided in the inner cavity of the lower middle part of the base 3. The installation inner groove 35 is connected to the circular rotating groove 32, and the locking piece 9 is installed in the installation inner groove 35. In the middle of the inner side of the base 3, there are two outer walls on the sides of the base 3 respectively with receiving grooves 36, and the elastic top block 10 is installed in the receiving grooves 36. The front end of the elastic top block 10 is set through the small cover plate 30. There is an inner slide groove 38 in the inner cavity on one side of the upper end of the base 3, and there is a bottom through hole 37 on the bottom surface of the inner cavity of the inner slide groove 38. The bottom through hole 37 is connected to the arc-shaped limiting groove 33. There is a rebound inner groove 39 on the inner wall of the upper end of the inner cavity of the inner slide groove 38, and the torsion spring 22 is set in the rebound inner groove 39.

[0032] Two locking grooves 51 are provided on the outer periphery of the central rotating block 5. When the front end of the switch 6 moves to the two sides of the inner cavity of the arc-shaped limiting groove 33, the locking grooves 51 will move to the lower part of the mounting inner groove 35 respectively. The locking element 9 includes a steel ball 91 and a connecting spring 92 installed on the top of the steel ball 91. The steel ball 91 is elastically slidably installed in the inner cavity of the mounting inner groove 35 through the connecting spring 92. The lower end of the steel ball 91 is locked in the locking groove 51. By setting the steel ball 91, when the switch 6 is moved to the two sides of the arc-shaped limiting groove 33, the steel ball 91 can be pushed into the locking groove 51 by the elastic force of the connecting spring 92, so as to lock and fix the position of the switch 6. When the operator's turning force on the switch 6 is greater than the pre-tightening force of the steel ball 91, the switch 6 can be pushed to rotate along the central rotating block 5, thereby locking and unlocking the base 3.

[0033] The elastic top block 10 includes a top block body 101 and a return spring 102 mounted on the top block body 101, and the top block body 101 is elastically slidably mounted in the inner cavity of the receiving groove 36 by the return spring 102.

[0034] Specifically, when the operator needs to replace the battery, they can use their finger to move the front end of switch 6, causing the front end of switch 6 to move to one side of the inner cavity of the arc-shaped limiting groove 33. During this process, the locking tongue 7 can be rotated by the central rotating block 5, so that the lower end of the locking tongue 7 can be moved out of the arc-shaped locking groove 11, thereby opening the base 3 and removing and installing the battery. When it is necessary to install the base 3 on the handle sleeve 1, the front end of switch 6 can be moved, and the locking tongue 7 can be reset by switch 6, thereby locking the base 3 on the handle sleeve 1. This setting is more efficient, convenient, durable, and controllable, which not only facilitates the removal and installation of batteries, but also improves the efficiency of medical electric drill use.

[0035] To address the technical problem that unlocking the base 3 from the handle sleeve 1 requires the operator to manually open the base 3 to install and remove the battery, which is cumbersome and inconvenient to use, such as... Figures 7-11 As shown, the following preferred technical solutions are provided:

[0036] Connecting shafts 21 are fixedly installed on the outer walls of the middle part of both sides of the connecting protrusion 2, and torsion springs 22 are respectively sleeved on the outer periphery of the connecting shafts 21.

[0037] A spring-loaded reset component 40 is installed in the inner cavity of the upper side of the base 3. The spring-loaded reset component 40 includes an upper push rod 401 and a rotating sleeve 402 movably installed in the inner cavity of the spring-loaded inner groove 39. The upper push rod 401 is slidably installed in the inner slide groove 38. A double groove roller 403 is movably installed in the middle of the inner cavity of the spring-loaded inner groove 39. The double groove roller 403 and the rotating sleeve 402 are connected by a transmission belt 404. A pull rope 406 is wound around the outer periphery of the other side of the double groove roller 403. A support roller 405 is movably installed on the lower inner wall of the outer side of the inner cavity of the spring-loaded inner groove 39. One end of the pull rope 406 passes around the support roller 405 and is connected to the inner outer wall of the upper end of the upper push rod 401.

[0038] The upper push rod 401 includes a middle push slider 4011 and a side protrusion 4012 fixedly installed on the outer wall of one side of the lower end of the middle push slider 4011. An upper abutment block 4013 is fixedly installed on the bottom surface of the side protrusion block 4012. The other side surface of the upper abutment block 4013 is inclined. The upper abutment block 4013 is slidably installed in the bottom through hole 37. The lower end of the upper abutment block 4013 protrudes into the arc-shaped limiting groove 33. The middle push slider 4011 is elastically slidably installed in the inner slide groove 38 by a compression spring 4014. One end of the pull rope 406 is connected and installed on the outer peripheral wall of the double groove roller 403. The other end of the pull rope 406 is connected and installed with a connecting block 4061. The connecting block 4061 is fixedly installed on the inner outer wall of the upper end of the middle push slider 4011.

[0039] The rotating sleeve 402 includes a rotating sleeve body 4021 and an H-shaped roller 4022 fixedly installed on the outer wall of the middle part of one side of the rotating sleeve body 4021. The H-shaped roller 4022 is movably installed on the inner wall of the inner cavity of the spring groove 39. A matching groove 4023 is provided on the outer wall of the middle part of the other side of the rotating sleeve body 4021. The matching groove 4023 is matched with the torsion spring 22. The torsion spring 22 is embedded in the matching groove 4023. The H-shaped roller 4022 is connected to the double groove roller 403 through the transmission belt 404. The diameter of the H-shaped roller 4022 is set to be smaller than the diameter of the double groove roller 403.

[0040] Specifically, when the operator needs to open the base 3, they can use their finger to move the front end of the switch 6, causing the front end of the switch 6 to move towards one side of the inner cavity of the arc-shaped limiting groove 33. When the front end of the switch 6 moves to one side of the inner cavity of the arc-shaped limiting groove 33, it will contact the bottom surface of the upper abutment block 4013, thereby pushing the upper abutment block 4013 upward. The upper abutment block 4013 will then drive the middle push slider 4011 to move upward through the side protrusion 4012. The middle push slider 4011 will then drive one end of the pull rope 406 to move upward through the connecting block 4061. The other end of the pull rope 406 will then pull the double groove roller 403 to rotate. Under the transmission action of the transmission belt 404, the roller 4022 will drive the roller 403 to rotate. The rotating sleeve body 4021 rotates, and under the restriction of the matching groove 4023, the torsion spring 22 is continuously compressed. Under the elastic force of the torsion spring 22, the connecting shaft 21 is driven to rotate, thereby causing the base 3 to automatically flip and open. When the switch 6 is reset, the upper push rod 401 will be reset under the elastic force of the compression spring 4014. At this time, the operator can close the base 3. This setting allows the operator to achieve multiple effects when pushing the switch 6. It not only realizes the automatic opening of the base 3 and facilitates the removal and installation of the battery, but also ensures the service life of the torsion spring 22, so that the torsion spring 22 will not deform and lose its elasticity due to long-term compression.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," 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 process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bottom cover switch structure, comprising a handle sleeve (1), characterized in that: A connecting protrusion (2) is provided at the center of the top surface of the handle sleeve (1), and a base (3) is embedded in one side of the handle sleeve (1). A concave connector (4) is provided at the other end of the upper part of the base (3), and the concave connector (4) is movably mounted on the connecting protrusion (2). A rotating block (5) is movably mounted at the center of the lower end of one side of the base (3). A switch (6) is fixedly mounted on the outer wall of the middle part of one side of the rotating block (5). A cover plate (20) is fixedly mounted on the inner outer wall of the base (3), and a switch (6) is provided at the center between the cover plate (20) and the base (3). There is a small cover plate (30), and the small cover plate (30) is located in the middle of the cover plate (20). A locking tongue (7) is provided at the lower middle position between the cover plate (20) and the base (3). The locking tongue (7) is fixedly connected to the central rotating block (5) by screws (8). A locking piece (9) is provided in the lower middle inner cavity of the base (3), and the locking piece (9) is located directly above the central rotating block (5). Elastic top blocks (10) are installed on both sides of the middle inner side of the base (3). An arc-shaped locking groove (11) is provided on the bottom surface of the middle side of the inner cavity of the handle sleeve (1).

2. The bottom cover switch structure according to claim 1, characterized in that: Connecting shafts (21) are fixedly installed on the outer walls of the middle part of both sides of the connecting protrusion (2), and torsion springs (22) are respectively sleeved on the outer periphery of the connecting shafts (21).

3. The bottom cover switch structure according to claim 2, characterized in that: An embedding groove (31) is provided on the outer wall of the lower middle part of one side of the base (3), and a circular rotating groove (32) is provided on the inner wall of the lower middle part of the inner cavity of the embedding groove (31). An arc-shaped limiting groove (33) is provided on the inner wall of the upper end of the inner cavity of the embedding groove (31). A bottom double through groove (34) is provided on the outer wall of the lower inner side of the base (3). An installation inner groove (35) is provided in the inner cavity of the lower middle part of the base (3). The installation inner groove (35) and the circular rotating groove (32) The base (3) is connected to the outer wall of the inner middle part of the base (3) and the two sides are respectively provided with receiving grooves (36). The inner cavity of the upper end of the base (3) is provided with an inner slide groove (38), and the bottom surface of the inner cavity of the inner slide groove (38) is provided with a bottom through hole (37). The bottom through hole (37) is connected to the arc-shaped limiting groove (33). The inner wall of the upper end of the inner cavity of the inner slide groove (38) is provided with a spring-loaded inner groove (39), and the torsion spring (22) is provided in the spring-loaded inner groove (39).

4. The bottom cover switch structure according to claim 3, characterized in that: Two snap-fit ​​grooves (51) are provided on the outer periphery of the rotating block (5). The snap-fit ​​part (9) includes a steel ball (91) and a connecting spring (92) installed on the top of the steel ball (91). The steel ball (91) is elastically slidably installed in the inner cavity of the mounting inner groove (35) through the connecting spring (92). The lower end of the steel ball (91) is snap-fitted in the snap-fit ​​groove (51).

5. The bottom cover switch structure according to claim 4, characterized in that: The elastic top block (10) includes a top block body (101) and a return spring (102) mounted on the top block body (101), and the top block body (101) is elastically slidably mounted in the inner cavity of the receiving groove (36) by the return spring (102).

6. The bottom cover switch structure according to claim 3, characterized in that: A spring-loaded reset component (40) is installed in the inner cavity of the upper side of the base (3). The spring-loaded reset component (40) includes an upper push rod (401) and a rotating sleeve (402) movably installed in the inner cavity of the spring-loaded inner groove (39). The upper push rod (401) is slidably installed in the inner slide groove (38). A double groove roller (403) is movably installed in the middle of the inner cavity of the spring-loaded inner groove (39). The double groove roller (403) and the rotating sleeve (402) are connected by a transmission belt (404). A pull rope (406) is wound around the outer periphery of the other side of the double groove roller (403). A support roller (405) is movably installed on the lower inner wall of the outer side of the inner cavity of the spring-loaded inner groove (39). One end of the pull rope (406) passes around the support roller (405) and is connected to the inner outer wall of the upper end of the upper push rod (401).

7. A bottom cover switch structure according to claim 6, characterized in that: The upper push rod (401) includes a middle push slider (4011) and a side protrusion (4012) fixedly installed on the outer wall of the lower end of the middle push slider (4011). An upper abutment (4013) is fixedly installed on the bottom surface of the side protrusion (4012). The other side surface of the upper abutment (4013) is inclined. The upper abutment (4013) is slidably installed in the bottom through hole (37). The lower end of the upper abutment (4013) protrudes into the arc-shaped limiting groove (33). The middle push slider (4011) is elastically slidably installed in the inner slide groove (38) by a compression spring (4014).

8. The bottom cover switch structure according to claim 7, characterized in that: The rotating sleeve (402) includes a rotating sleeve body (4021) and an H-shaped roller (4022) fixedly installed on the outer wall of the middle part of one side of the rotating sleeve body (4021). The H-shaped roller (4022) is movably installed on the inner wall of the inner cavity of the spring groove (39). A matching groove (4023) is provided on the outer wall of the middle part of the other side of the rotating sleeve body (4021). The matching groove (4023) is matched with the torsion spring (22). The torsion spring (22) is embedded in the matching groove (4023).

9. A bottom cover switch structure according to claim 8, characterized in that: The H-shaped roller (4022) is connected to the double groove roller (403) via a transmission belt (404), and the diameter of the H-shaped roller (4022) is set to be smaller than the diameter of the double groove roller (403).

10. A bottom cover switch structure according to claim 9, characterized in that: One end of the pull rope (406) is connected and installed on the outer peripheral wall of the double groove roller (403), and the other end of the pull rope (406) is connected and installed with a connecting block (4061), and the connecting block (4061) is fixedly installed on the inner outer wall of the upper end of the middle push slider (4011).

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