Lock shaft mechanism and optometry unit

Abstract

The utility model discloses a lock shaft mechanism and an optometry unit. The shaft locking mechanism comprises a mounting seat, a braking part and a driving part; one end of the shaft body is rotatably mounted on the mounting seat; the brake component is movably arranged in the mounting seat; the driving part is rotationally arranged on the mounting seat and is in contact with the braking part; the driving piece rotates relative to the mounting base so as to have a first working position and a second working position, and when the driving piece is located at the first working position, the driving piece can act on the braking piece to drive the braking piece to abut against the shaft body so as to be in a braking state; and when the driving piece moves from the first working position to the second working position, the braking piece can be far away from the shaft body to be in an unlocking state. According to the shaft locking mechanism, when the optometry unit does not work, the shaft body cannot rotate randomly, the stability of the optometry unit in the transferring process can be better guaranteed, the optometry unit is better protected, and the service life of the optometry unit is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of eye detection equipment, in particular to a shaft locking mechanism and an optometry instrument. Background Art

[0002] An ophthalmometer is a device that can quickly detect the condition of the lens of the human eye. For example, an ophthalmometer can be used to test vision and refractive power. Since the demand for ophthalmometers is widespread and there are many optometry scenarios. The ophthalmometer needs to be moved when it leaves the factory or is transferred for use. Since the detection module of the ophthalmometer can generally be driven by a driving mechanism to move flexibly, the detection module can be better focused with the eye of the person being tested. However, during the transfer process, since the driving mechanism does not provide driving force to the shaft, the shaft of the ophthalmometer is prone to shaking during the transfer process, which drives the detection module or other components to move. Since the precision of each optical component in the ophthalmometer is high, irregular movement is likely to cause damage to the high-precision components in the ophthalmometer during the transfer process, affecting the normal use of the ophthalmometer. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is that during the transfer process of the traditional ophthalmometer, the internal components are easy to shake, which easily causes damage to the components, resulting in the entire ophthalmometer not being able to function normally.

[0004] In order to solve the above technical problems, the utility model provides a shaft locking mechanism, comprising:

[0005] A mounting seat, suitable for one end of the shaft to be rotatably mounted thereon;

[0006] A brake member, movably disposed in the mounting seat;

[0007] A driving member, rotatably disposed on the mounting seat and in contact with the braking member;

[0008] Wherein, the driving member rotates relative to the mounting seat to have a first working position and a second working position. When the driving member is in the first working position, the driving member can act on the braking member and drive the braking member to press against the shaft body to be in a braking state; when the driving member moves from the first working position to the second working position, the braking member can move away from the shaft body to be in an unlocked state.

[0009] Optionally, a first mounting hole is provided on the mounting seat; the braking member includes a brake block, which is movably disposed in the first mounting hole and can move axially along the first mounting hole, the first end of the first mounting hole is suitable to be opposite to the outer peripheral side of the shaft body, and the driving member is disposed at the second end of the first mounting hole.

[0010] Optionally, the brake block is suitable for being provided with a first braking surface and a second braking surface toward one end of the shaft body, the first braking surface and the second braking surface are arranged opposite to each other, and in the direction from the first end toward the second end, the first braking surface and the second braking surface are arranged gradually closer to each other.

[0011] Optionally, the driving member includes a driving rod, one end of which is provided with an abutment portion, and the other end of the driving rod can extend from the mounting seat; wherein, when the driving rod is in the first working position, the abutment portion abuts against the brake block and makes the brake block abut against the shaft body, and when the driving rod is in the second working position, the abutment portion contacts the brake block and makes the brake block separate from the shaft body.

[0012] Optionally, the abutment portion includes a boss protruding from the drive rod, the boss having an arc-shaped abutment surface; in the direction of rotation from the second working position toward the first working position, the distance between the abutment surface and the rotation center of the drive rod is gradually narrowed.

[0013] Optionally, a gripping portion is provided at the other end of the driving rod, and the gripping portion is exposed outside the mounting seat; and / or,

[0014] The brake member further comprises a brake leaf spring connected to the brake block, and the brake leaf spring is located on a side of the brake block facing the driving member.

[0015] Optionally, the brake leaf spring has a connecting section and two limiting sections respectively arranged on opposite sides of the connecting section, and the two limiting sections are both inclined to respectively abut against the driving rod at the first working position and the second working position.

[0016] The utility model also provides an optometry instrument, comprising:

[0017] case;

[0018] The above-mentioned shaft locking mechanism is arranged in the housing; and

[0019] The driving mechanism is arranged in the shell, and comprises a driver and a shaft body whose one end is connected to the driver, and the other end of the shaft body is rotatably connected to the mounting seat of the shaft locking mechanism.

[0020] Optionally, the ophthalmometer further includes a locking detection mechanism, a starting component provided on the shell, and a controller electrically connected to the locking detection mechanism and the starting component. The locking detection mechanism can be used to detect the working position of the driving member of the locking shaft mechanism, and when the driving member is in the first working position, the controller can control the starting component to be unable to start according to the detection information of the locking detection mechanism.

[0021] Optionally, the locking detection mechanism comprises:

[0022] A position detection switch is arranged on one side of the mounting seat of the locking shaft mechanism and has a first working state and a second working state;

[0023] A triggering member, located at one side of the position detection switch and having elastic deformation;

[0024] When the driving member is in the second working position, the trigger member is arranged away from the position detection switch, and the position detection switch is in the first working state; when the driving member is in the first working position, the trigger member can be driven to undergo elastic deformation under the action of the driving member to abut against the position detection switch, thereby prompting the position detection switch to switch to the second working state.

[0025] The technical solution provided by the utility model has the following advantages:

[0026] The utility model provides a shaft locking mechanism, comprising a mounting seat, a brake member and a driving member, wherein the mounting seat can be used for a shaft body to be rotatably mounted thereon, and can also cover the brake member and the driving member to better protect the brake member and the driving member; and, by the driving member being rotatably arranged on the mounting seat, by adjusting the driving member to a first working position, the brake member can be driven by the driving member to move to be pressed against the shaft body, so that the shaft body is in a braking state and cannot rotate, ensuring that the shaft body can be braked and fixed by the brake member when not working, and the shaft body will not rotate during the transfer of the ophthalmometer, thereby ensuring that other components inside the ophthalmometer are not easy to move, making the ophthalmometer safer and more stable during the transfer process; and when the ophthalmometer is working normally, the driving member can be adjusted to the second working position, so that the shaft body can be flexibly rotated, ensuring the sensitivity of the ophthalmometer detection. The shaft locking mechanism can make the optometre work more flexibly, and can ensure that the shaft body is not easy to rotate randomly when the optometre is not working, and can also ensure the stability of the optometre during the transfer process, so as to better protect the optometre and extend the service life of the optometre. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A structural schematic diagram of an embodiment of a shaft locking mechanism provided by the utility model;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure of the shaft locking mechanism (excluding the mounting base) described in the figure;

[0030] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the shaft locking mechanism;

[0031] Figure 4 A schematic structural diagram of an embodiment of an optometry instrument provided by the utility model;

[0032] Figure 5 for Figure 4 A schematic diagram of the structure of the ophthalmometer described in (excluding the locking detection mechanism);

[0033] Figure 6 for Figure 4 A schematic diagram of an exploded structure of the ophthalmometer described in the embodiment;

[0034] Figure 7 for Figure 4 A schematic cross-sectional structure diagram of the optometry instrument described in the embodiment;

[0035] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of detail A;

[0036] Fig. 9 for Figure 4 A cross-sectional structural schematic diagram of the locking shaft mechanism described in .

[0037] Description of reference numerals:

[0038] 1000-optometre; 100-locking shaft mechanism; 1-mounting seat; 11-first mounting hole; 12-second through hole; 2-braking member; 21-brake block; 211-first braking surface; 212-second braking surface; 22-brake leaf spring; 221-connecting section; 222-limiting section; 3-driving member; 31-driving rod; 32-abutting portion; 321-boss; 3211-abutting surface; 33-gripping portion; 4-locking detection mechanism; 41-position detection switch; 42-trigger member; 200-housing; 201-first through hole; 300-driving mechanism; 301-driver; 302-axis body. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0041] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0042] The utility model provides a shaft locking mechanism 100, which can be applied to an optometre 1000, so that when the optometre 1000 is not working, the shaft body 302 in the optometre 1000 can be locked to ensure that the optometre 1000 is more stable and less prone to damage when moving.

[0043] Specifically, see Figures 1 to 3The locking shaft mechanism 100 includes a mounting seat 1, a brake member 2 and a driving member 3. The mounting seat 1 is suitable for one end of the shaft body 302 to be rotatably mounted thereon; the brake member 2 is movably arranged in the mounting seat 1; the driving member 3 is rotatably arranged on the mounting seat 1 and contacts the brake member 2; wherein the driving member 3 rotates relative to the mounting seat 1 to have a first working position and a second working position. When the driving member 3 is in the first working position, the driving member 3 can act on the brake member 2 and drive the brake member 2 to be pressed against the shaft body 302 to be in a braking state; when the driving member 3 moves from the first working position to the second working position, the brake member 2 can be away from the shaft body 302 to be in an unlocking state. The mounting seat 1 can be used as a support seat for the shaft body 302 and also as a mounting base for the driving member 3 and the brake member 2, which makes it easier to ensure the assembly concentricity of the shaft body 302 and the locking shaft mechanism 100, and can also avoid the problem of the axis center running off due to long-term use of the locking shaft mechanism 100.

[0044] In the present invention, the mounting seat 1 can be used for the shaft 302 to be rotatably mounted thereon, and can also cover the brake member 2 and the driving member 3 to better protect the brake member 2 and the driving member 3; moreover, the driving member 3 is rotatably mounted on the mounting seat 1, and by adjusting the driving member 3 to the first working position, the brake member 2 can be driven by the driving member 3 to move and abut against the shaft 302, so that the shaft 302 is in a braking state and cannot rotate, ensuring that the shaft 302 can be braked and fixed by the brake member 2 when not working, and the shaft 302 will not rotate during the transfer of the ophthalmometer 1000, thereby ensuring that other components inside the ophthalmometer 1000 are not easy to move, making the ophthalmometer 1000 safer and more stable during the transfer process. When the ophthalmometer 1000 is working normally, the driving member 3 can be adjusted to the second working position, so that the shaft 302 can rotate flexibly, ensuring the sensitivity of the detection of the ophthalmometer 1000. The shaft locking mechanism 100 can make the ophthalmometer 1000 work more flexibly, and can ensure that the shaft body 302 is not easily rotated when the ophthalmometer 1000 is not working, and can also ensure the stability of the ophthalmometer 1000 during the transfer process, better protect the ophthalmometer 1000, and extend the service life of the ophthalmometer 1000.

[0045] The mounting seat 1 is substantially in the shape of a rectangular parallelepiped, and a first mounting hole 11 is provided on the mounting seat 1. Figure 1 and Figure 7As shown, the first mounting hole 11 is provided in the middle of the mounting seat 1. The brake member 2 comprises a brake block 21, which is movably provided in the first mounting hole 11 and can move along the axial direction of the first mounting hole 11. The shape of the brake block 21 matches the shape of the first mounting hole 11. The brake block 21 is generally cylindrical. The first end of the first mounting hole 11 along its axial direction is suitable to be opposite to the outer peripheral side of the shaft body 302. The driving member 3 is provided at the second end of the first mounting hole 11 along its axial direction. The driving member 3 acts on the brake block 21, and then the brake block 21 abuts against the shaft body 302, so that the shaft body 302 is braked to better protect the shaft body 302.

[0046] Furthermore, since the shaft body 302 is cylindrical, in order to better brake the shaft body 302, Figure 2 and Figure 3 As shown, a first braking surface 211 and a second braking surface 212 are provided at one end of the brake block 21 that is suitable for facing the shaft body 302. The first braking surface 211 and the second braking surface 212 are arranged opposite to each other, and in the direction from the first end toward the second end, the first braking surface 211 and the second braking surface 212 are arranged gradually close to each other. The first braking surface 211 and the second braking surface 212 are arranged roughly in a "V" shape, so that when the brake block 21 moves toward the shaft body 302, it can be forked to the outside of the shaft body 302 through the V-shaped opening, thereby fixing the shaft body 302 to ensure a better braking effect.

[0047] Moreover, the brake member 2 also includes a brake leaf spring 22 arranged at the second end of the brake block 21. The brake leaf spring 22 is in contact with the driving member 3, so that the driving member 3 is more stable and less likely to shake when it is in the first working position and the second working position, thereby ensuring the braking effect on the shaft 302.

[0048] Furthermore, if Figure 3 As shown in , the brake leaf spring 22 has a connecting section 221 and two limiting sections 222 respectively arranged on opposite sides of the connecting section 221, and the two limiting sections 222 are both inclined to respectively abut against the driving rod 31 at the first working position and the second working position. The connecting section 221 can be connected and fixed to the brake block 21 by screws, and the two limiting sections 222 are relatively arranged, so that when the driving member 3 is in the first working position, one of the limiting sections 222 can abut against the driving member 3, and when the driving member 3 is in the second working position, the other limiting section 222 can abut against the driving member 3, so as to ensure that the driving member 3 will not easily switch working positions and is more stable.

[0049] For the driving member 3, preferably, the Figures 1 to 3 As shown, the driving member 3 includes a driving rod 31, one end of which is provided with an abutting portion 32, and the other end of the driving rod 31 can extend from the mounting seat 1; wherein, when the driving rod 31 is in the first working position, the abutting portion 32 abuts against the brake block 21, and makes the brake block 21 abut against the shaft body 302, thereby pressing and locking the shaft body 302. When the driving rod 31 is in the second working position, the abutting portion 32 contacts the brake block 21, and makes the brake block 21 separate from the shaft body 302, so that the shaft body 302 can rotate freely, so that it can work normally to drive the movement of the internal components of the ophthalmometer 1000. The abutting portion 32 acts on the brake block 21 at different positions, so that the brake block 21 can abut against and separate from the shaft body 302 to switch the working state of the shaft body 302, which is simple and convenient to operate, and the protection of the shaft body 302 is more reliable.

[0050] Further preferably, the abutting portion 32 includes a boss 321 protruding from the driving rod 31, and the boss 321 has an abutting surface 3211 arranged in an arc shape; in the direction of rotation from the second working position to the first working position, the distance between the abutting surface 3211 and the rotation center of the driving rod 31 is gradually arranged. That is, when the driving rod 31 is in the first working position, the distance between the area where the abutting surface 3211 contacts the brake block 21 and the rotation center of the driving rod 31 is greater than the distance between the area where the abutting surface 3211 contacts the brake block 21 and the rotation center of the driving rod 31 when the driving rod 31 is in the first working position. Therefore, when the driving rod 31 is in the first working position, the driving rod 31 can abut the brake rod to move toward the shaft body 302 for a greater distance, so that the brake block 21 can contact the shaft body 302 more closely until it is locked.

[0051] It is understandable that the driving rod 31 can be driven to rotate by the driving mechanism 300, or the driving rod 31 can be rotated manually. Preferably, in the present invention, the driving rod 31 is rotated manually, which is more cost-effective and has a simpler structure.

[0052] Moreover, if Figure 2 As shown in , a gripping portion 33 is provided at the other end of the driving rod 31 , and the gripping portion 33 is exposed on the outside of the mounting seat 1 . The driving rod 31 can be operated to move by operating the gripping portion 33 manually, which is more convenient to operate.

[0053] The utility model also provides an optometry instrument 1000, combined with Figures 4 to 6As shown, the ophthalmometer 1000 includes the above-mentioned locking mechanism 100, a housing 200 and a driving mechanism 300. The locking mechanism 100 and the driving mechanism 300 are both arranged in the housing 200. The driving mechanism 300 includes a driver 301 and a shaft 302 connected to the driver 301 at one end, and the other end of the shaft 302 is rotatably connected to the mounting seat 1 of the locking mechanism 100. When the ophthalmometer 1000 is working normally, the driving rod 31 of the locking mechanism 100 is in the second working position, and the shaft 302 can be rotated under the drive of the driver 301 to drive the movable parts inside the ophthalmometer 1000 to move, so that the detection effect of the ophthalmometer 1000 is better. When the ophthalmometer 1000 is not working, the driving rod 31 can be adjusted to the first working position, and the shaft 302 can be locked by the brake block 21, so as to prevent the shaft 302 from rotating by mistake and affecting other parts.

[0054] Furthermore, in order to prevent the operator from accidentally starting the ophthalmometer 1000 when the ophthalmometer 1000 is in a braking state, thereby causing damage to the shaft 302. Figure 1 and Figure 4 As shown, the ophthalmometer 1000 also includes a locking detection mechanism 4, a starting component (not shown in the drawings) provided on the shell, and a controller (not shown in the drawings) electrically connected to the locking detection mechanism 4 and the starting component. The locking detection mechanism 4 can be used to detect the working position of the driving member 3 of the locking shaft mechanism 100, and when the driving member 3 is in the first working position, the controller can control the starting component to be unable to start according to the detection information of the locking detection mechanism 4, thereby effectively preventing the operator from mistakenly starting the ophthalmometer 1000 when the ophthalmometer 1000 is in a braking state, causing the shaft 302 and the locking shaft mechanism 100 to be damaged by forced friction.

[0055] It should be noted that the start component can be set in many forms. For example, the start component can be a start button, a start touch button, a voice control, or a remote control start mode, etc., provided on the housing 200. When the user issues a start command to order the ophthalmometer 1000 to start, if the shaft locking mechanism 100 is in the unlocked state, the ophthalmometer 1000 will start the drive mechanism 300 to work after receiving the start command. When the shaft locking mechanism 100 is in the braking state, the controller will control the start component not to work, and may issue a prompt warning to remind the operator that the ophthalmometer 1000 is in the braking state. Among them, the prompt warning can be a sound signal (such as a voice broadcast device is in a locked state, etc.), or a photoelectric signal (issuing a flash warning), or a combination of the above two alarm modes, etc.

[0056] Preferably, combined Figure 4 and Fig. 9 As shown, the locking detection mechanism 4 includes a position detection switch 41 and a trigger 42. The position detection switch 41 is arranged at one side of the mounting seat 1 of the locking shaft mechanism 100 and has a first working state and a second working state. The trigger 42 is located at one side of the position detection switch 41 and has elastic deformation. When the driving member 3 is in the second working position, the trigger 42 is arranged away from the position detection switch 41, and the position detection switch 41 is in the first working state. When the driving member 3 is in the first working position, the trigger 42 can be driven to elastically deform to abut against the position detection switch 41 under the action of the driving member 3, prompting the position detection switch 41 to switch to the second working state. The controller can control the operation of the starting component according to the working state of the position detection switch 41 to better protect the shaft body 302 and the entire ophthalmometer 1000.

[0057] Furthermore, combined with Figures 6 to 8 As shown, a first through hole 201 is provided at the bottom of the shell 200, and a second through hole 12 is provided on the mounting base 1 of the locking shaft mechanism 100, which is opposite to the first through hole 201. At least a part of the driving member 3 of the locking shaft mechanism 100 can extend from the second through hole 12 and be exposed outside the first through hole 201, so that the gripping portion 33 of the driving rod 31 is exposed at the bottom of the shell 200, which is more concealed and convenient to operate.

[0058] The ophthalmometer 1000 provided by the utility model can be locked by the shaft locking mechanism 100 when not in use, so that the shaft body 302 will not rotate arbitrarily, and the shaft body 302 and other components in the ophthalmometer 1000 can be better protected, so that the stability of the ophthalmometer 1000 is better and the service life of the ophthalmometer 1000 is extended.

[0059] Obviously, the above described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the utility model.

Claims

1. A shaft locking mechanism, characterized in that: include: A mounting seat, suitable for one end of the shaft to be rotatably mounted thereon; A brake member, movably disposed in the mounting seat; A driving member, rotatably disposed on the mounting seat and in contact with the braking member; Wherein, the driving member rotates relative to the mounting seat to have a first working position and a second working position. When the driving member is in the first working position, the driving member can act on the braking member and drive the braking member to press against the shaft body to be in a braking state; when the driving member moves from the first working position to the second working position, the braking member can move away from the shaft body to be in an unlocked state.

2. The shaft locking mechanism according to claim 1, characterized in that: A first mounting hole is provided on the mounting seat; the braking member includes a brake block, which is movably disposed in the first mounting hole and can move axially along the first mounting hole, the first end of the first mounting hole is suitable to be opposite to the outer peripheral side of the shaft body, and the driving member is disposed at the second end of the first mounting hole.

3. The shaft locking mechanism according to claim 2, characterized in that: The brake block has a first brake surface and a second brake surface at one end facing the shaft body. The first brake surface and the second brake surface are arranged opposite to each other and gradually approach each other in the direction from the first end toward the second end.

4. The shaft locking mechanism according to claim 2, characterized in that: The driving member includes a driving rod, one end of which is provided with an abutment portion, and the other end of the driving rod can extend from the mounting seat; wherein, when the driving rod is in the first working position, the abutment portion abuts against the brake block and makes the brake block abut against the shaft body, and when the driving rod is in the second working position, the abutment portion contacts the brake block and makes the brake block separate from the shaft body.

5. The shaft locking mechanism according to claim 4, characterized in that: The abutment portion includes a boss protruding from the drive rod, and the boss has an arc-shaped abutment surface; in the direction of rotation from the second working position toward the first working position, the distance between the abutment surface and the rotation center of the drive rod is gradually arranged.

6. The shaft locking mechanism according to claim 4, characterized in that: The other end of the driving rod is provided with a gripping portion, and the gripping portion is exposed outside the mounting seat; and / or, The brake member further comprises a brake leaf spring connected to the brake block, and the brake leaf spring is located on a side of the brake block facing the driving member.

7. The shaft locking mechanism according to claim 6, characterized in that: The brake leaf spring comprises a connecting section and two limiting sections respectively arranged on opposite sides of the connecting section. The two limiting sections are both inclined to respectively abut against the driving rod at the first working position and the second working position.

8. An optometry instrument, characterized in that: include: case; The shaft locking mechanism according to any one of claims 1 to 7, wherein the shaft locking mechanism is disposed in the housing; and The driving mechanism is arranged in the shell, and comprises a driver and a shaft body whose one end is connected to the driver, and the other end of the shaft body is rotatably connected to the mounting seat of the shaft locking mechanism.

9. The ophthalmometer according to claim 8, characterized in that: The ophthalmometer also includes a locking detection mechanism, a starting component arranged on the shell, and a controller electrically connected to the locking detection mechanism and the starting component. The locking detection mechanism can be used to detect the working position of the driving member of the locking shaft mechanism, and when the driving member is in the first working position, the controller can control the starting component to be unable to start according to the detection information of the locking detection mechanism.

10. The ophthalmometer according to claim 9, characterized in that: The locking detection mechanism comprises: A position detection switch is arranged on one side of the mounting seat of the locking shaft mechanism and has a first working state and a second working state; A triggering member, located at one side of the position detection switch and having elastic deformation; When the driving member is in the second working position, the trigger member is arranged away from the position detection switch, and the position detection switch is in the first working state; when the driving member is in the first working position, the trigger member can be driven to undergo elastic deformation under the action of the driving member to abut against the position detection switch, thereby prompting the position detection switch to switch to the second working state.

Images