Garden tool

Abstract

The application relates to a garden tool which comprises a main machine, a push rod, an unlocking mechanism and an operating piece. The main machine is provided with a fixing plate, at least two positioning holes are formed in the fixing plate. The push rod is rotationally installed on the main machine. The unlocking mechanism comprises a telescopic pin and an unlocking piece. The telescopic pin is slidingly installed on the push rod, and the telescopic pin has a locking state matched with the positioning hole and an unlocking state disengaged from the positioning hole. The unlocking piece is rotationally connected to the telescopic pin around a first axis, and the unlocking piece has an unlocking surface which abuts against the push rod. When the push rod abuts against the unlocking surface, the push rod and the unlocking surface form a first contact point and a second contact point, and the distance between the first contact point and the first axis is smaller than the distance between the second contact point and the first axis. The operating piece is connected to the unlocking piece. When the operating piece drives the unlocking piece to rotate from the first contact point to the second contact point, the telescopic pin is disengaged from the positioning hole, and the telescopic pin is switched from the locking state to the unlocking state.

Description

Technical Field

[0001] This application relates to the field of garden tool technology, and in particular to a garden tool. Background Technology

[0002] Lawn sweepers, snowplows, and other outdoor gardening tools are equipped with push rods for pushing. The push rod structure makes lawn sweepers relatively bulky, so push rods that can be folded relative to the lawn sweeper are usually provided. This way, when storing the lawn sweeper as a whole, the push rod can be folded to the front of the main unit to reduce the space occupied by the whole machine.

[0003] The push rods of existing lawnmowers mostly use a complex linkage transmission structure to achieve folding, locking, and unlocking, which has poor structural stability and occupies a lot of space. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide a garden tool that employs a simple and highly stable structure to achieve locking and unlocking of the push rod folding mechanism.

[0005] The present invention can solve the problems of the prior art by adopting the following technical solutions: This application provides a garden tool, comprising a main unit, a push rod, an unlocking mechanism, and an operating component. The main unit is mounted on a fixing plate with at least two positioning holes. The push rod is rotatably mounted on the main unit. The unlocking mechanism includes a telescopic pin and an unlocking component. The telescopic pin is slidably mounted on the push rod, having a locked state engaged with the positioning holes and an unlocked state disengaged from the positioning holes. The unlocking component is rotatably connected to the telescopic pin about a first axis, and has an unlocking surface that abuts against the push rod. When the push rod abuts against the unlocking surface, a first contact point and a second contact point are formed. The distance between the first contact point and the first axis is less than the distance between the second contact point and the first axis. The operating component is connected to the unlocking component. When the operating component drives the unlocking component to rotate from the first contact point to the second contact point, the telescopic pin disengages from the positioning holes, transitioning from the locked state to the unlocked state.

[0006] Optionally, the unlocking surface is a smooth curved surface, and the unlocking surface is eccentric to the first axis.

[0007] Optionally, the first contact point and the second contact point are located on two different planes.

[0008] Optionally, the distance from the connection point between the operating element and the unlocking element to the first axis is greater than the distance from the second contact point to the first axis.

[0009] Optionally, the telescopic pin is slidably mounted on the push rod in a direction perpendicular to the axis of the push rod.

[0010] Optionally, the unlocking component includes a connecting plate and at least two unlocking plates. The connecting plate connects the at least two unlocking plates, which are respectively disposed on both sides of the telescopic pin. Each unlocking plate is provided with an unlocking surface that abuts against the push rod. The at least two unlocking plates are rotatably connected to the telescopic pin via the same rotating shaft.

[0011] Optionally, the unlocking mechanism further includes a pin sleeve, which includes a guide portion and a mounting portion. The guide portion is installed inside the push rod and has a through hole. The telescopic pin is slidably installed in the through hole. The mounting portion is located outside the push rod and is fixedly installed to the push rod by bolts.

[0012] Optionally, the unlocking mechanism further includes a first elastic element disposed between the unlocking member and the push rod, and abutting or connecting with the unlocking member and the push rod.

[0013] Optionally, the unlocking mechanism further includes a second elastic element disposed between the telescopic pin and the push rod, and abutting or connecting with the telescopic pin and the push rod.

[0014] Optionally, the unlocking mechanism further includes a housing, which is fixedly mounted on the push rod and cooperates with the push rod to form a receiving cavity, the receiving cavity containing the unlocking mechanism.

[0015] Optionally, the above-mentioned garden tool also includes one of the operating components, two of the push rods, and two unlocking mechanisms, with the two unlocking mechanisms respectively disposed on the two push rods, and the operating component connected to the two unlocking mechanisms respectively.

[0016] Optionally, the unlocking mechanism further includes a flexible strip, one end of which is connected to the unlocking element and the other end of which is connected to the operating element.

[0017] Optionally, the end of the push rod away from the main unit is provided with a user engagement portion, and the operating element is disposed on or adjacent to the user engagement portion. Compared with the prior art, the present invention has the following beneficial effects: This application employs a structure where the unlocking surface of the unlocking component engages with a telescopic pin to unlock and lock the push rod's rotation. Especially in scenarios where the telescopic pin slides perpendicular to the push rod, compared to a linkage mechanism, this reduces the number of hinge points, simplifies the unlocking mechanism's structure, and reduces space occupation. Furthermore, the unlocking surface of the unlocking component is always in contact with the push rod, with seamless contour engagement, making it less prone to loosening under vibration and ensuring high stability. Additionally, this application uses an elastic element acting on the unlocking component or the telescopic pin to achieve automatic locking of the telescopic pin, improving the user experience. The operating component is positioned close to the user, allowing them to unlock the push rod without bending over or excessively. The operating component simultaneously operates two unlocking mechanisms, requiring only one operation to unlock both push rods simultaneously, simplifying user operation and enhancing the user experience. Attached Figure Description

[0018] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings: Figure 1 This is a complete machine drawing of a garden tool provided in an embodiment of the present invention; Figure 2 This is a diagram of a push rod structure for a garden tool provided in an embodiment of the present invention; Figure 3 yes Figure 2 A magnified view of a portion of the image; Figure 4 This is a schematic diagram of the locked state of an unlocking mechanism provided in an embodiment of the present invention; Figure 5 yes Figure 4 A structural diagram showing the locked state of the unlocking mechanism from another perspective; Figure 6 This is a structural schematic diagram of the unlocking state of an unlocking mechanism provided in an embodiment of the present invention; Figure 7 This is a cross-sectional view of the unlocking state of an unlocking mechanism provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the connection between the operating component and the unlocking mechanism provided in an embodiment of the present invention.

[0019] Meaning of the reference numerals in the diagram: 100. Main unit; 110. Fixing plate; 120. Positioning hole; 130. Chassis; 140. Wheel; 200. Push rod; 300. Unlocking mechanism; 310. Telescopic pin; 320. Unlocking component; 400. Operating component; 340. Second elastic component; 321. Unlocking plate; 322. Connecting plate; 323. Unlocking surface; 324. Rotating shaft; 350. Pin sleeve; 351. Guide part; 352. Mounting part; 354. Bolt; 360. Housing; 370. Flexible strip; 500. User joint; 600. Crossbar; 610. Transmission component; 700. Rotating shaft. Detailed Implementation

[0020] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," and "rear" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0021] Please refer to Figures 1-8 This application provides a garden tool, which includes a main unit 100, a push rod 200, an operating component 400, and an unlocking mechanism 300. A fixing plate 110 is mounted on the main unit 100, and the fixing plate 110 has at least two positioning holes 120. The push rod 200 is rotatably mounted on the main unit 100. The unlocking mechanism 300 includes a telescopic pin 310 and an unlocking component 320. The telescopic pin 310 is slidably mounted on the push rod 200 and has a locked state that engages with the positioning holes 120 and an unlocked state that disengages from the positioning holes 120. The unlocking component 320 is rotatably connected to the telescopic pin 310 about a first axis. The unlocking component 320 has an unlocking surface 323 that abuts against the push rod 200. When the push rod 200 abuts against the unlocking surface 323, a first contact point and a second contact point are formed. The distance between the first contact point and the first axis is less than the distance between the second contact point and the first axis. The operating element 400 is connected to the unlocking element 320. When the operating element 400 drives the unlocking element 320 to rotate from the first contact point to the second contact point, the telescopic pin 310 disengages from the positioning hole 120, changing from the locked state to the unlocked state.

[0022] It should be understood that the above-mentioned garden tools include, but are not limited to, lawnmowers, snowplows, and other tools equipped with push rods 200. This application uses a lawnmower as an example for illustration.

[0023] Optionally, at least one of the at least two positioning holes 120 corresponds to the folded state of the push rod 200, and at least one corresponds to the working state of the push rod 200. Optionally, the number of positioning holes 120 is four, of which three positioning holes 120 correspond to the working states of the push rod 200 at different angles. The positioning holes 120 can be slots, through holes, or blind holes, etc., structures that can limit the telescopic pin 310. The main unit 100 includes a chassis 130, an actuator, a motor, wheels 140, and other main functional structures. The actuator corresponding to the lawnmower is a cutting blade. The push rod 200 is rotatably mounted on the main unit 100 via a rotating shaft 700. Specifically, the rotating shaft 700 is rotatably mounted on the main unit 100, and the push rod 200 is fixedly mounted on the rotating shaft 700.

[0024] In the above implementation process, such as Figure 4 ,5 As shown, when the operating component 400 is in the first position, the push rod 200 contacts the first contact point of the unlocking surface 323, and the telescopic pin 310 extends into the positioning hole 120, locking the push rod 200 onto the main unit 100 and preventing it from rotating. When the user manipulates the operating component 400 to move it from the first position to the second position, the operating component 400 connects to the unlocking component 320. The unlocking component 320 rotates and causes the telescopic pin 310 to slide relative to the push rod 200 until the push rod 200 contacts the second contact point of the contact surface. Figure 6 As shown, the telescopic pin 310 disengages from the positioning hole 120, unlocking the push rod 200 from the main unit 100, allowing the push rod 200 to rotate relative to the main unit 100 and adjust the angle of the push rod 200.

[0025] As can be seen from the above process, the unlocking mechanism 300 provided in this application has only one hinge point, namely the hinge point between the unlocking component 320 and the telescopic pin 310. Compared with linkage mechanisms with multiple hinge points, it occupies less space and has a simpler structure. In addition, the unlocking surface 323 always abuts against the push rod 200, with contour engagement, making it less prone to loosening under vibration and exhibiting high stability.

[0026] Optionally, the action of the telescopic pin 310 changing from the unlocked state to the locked state can be achieved by the user directly operating the operating member 400 to move the operating member 400 from the second position to the first position; or it can be achieved by means of an elastic structure, whereby the user releases the operating member, and the elastic structure acts directly or indirectly on the telescopic pin 310, causing the telescopic pin 310 to automatically extend into the positioning hole 120.

[0027] In one possible implementation, the distance between the unlocking surface 323 and the first axis gradually increases from the first contact point to the second contact point.

[0028] During the above implementation process, as the distance between the unlocking surface 323 and the first axis gradually increases from the first contact point to the second contact point, the unlocking component 320 rotates smoothly relative to the push rod 200 during the rotation process, without any jamming points in the middle. On the one hand, this is conducive to realizing the control of the unlocking component 320 by the operating component 400, and on the other hand, the unlocking operation is smooth and without jamming, which is conducive to improving the user experience.

[0029] In one possible implementation, the unlocking surface 323 is a smooth curved surface, and the unlocking surface 323 is eccentric to the first axis. That is, the unlocking member 320 adopts a cam structure, and the smooth curved surface rolls on the push rod 200, which can reduce the resistance of the unlocking member 320's rotation, improve the smoothness of the locking and unlocking actions of the unlocking member 320, and enhance the user's operating experience.

[0030] In one possible implementation, the first contact point and the second contact point are located on two separate planes. That is, the unlocking surface 323 comprises two planes, which can be adjacent or connected by another plane or curved surface.

[0031] In one possible implementation, the distance from the connection point between the operating element 400 and the unlocking element 320 to the first axis is greater than the distance from the second contact point to the first axis.

[0032] In the above implementation process, the distance from the connection point between the operating component 400 and the unlocking component 320 to the first axis is greater than the distance from the second contact point to the first axis, and the power arm is greater than the resistance arm. This forms a force-saving lever on the unlocking component 320, which can reduce the force applied by the user to operate the operating component 400 and improve the user experience.

[0033] Optionally, the telescopic pin 310 is slidably mounted on the push rod 200 in a direction perpendicular to the axis of the push rod 200.

[0034] In one possible implementation, the unlocking component 320 includes a connecting plate 322 and at least two unlocking plates 321. The connecting plate 322 connects at least two unlocking plates 321, which are respectively disposed on both axial sides of the telescopic pin 310. Each unlocking plate 321 is provided with an unlocking surface 323 that abuts against the push rod 200. At least two unlocking plates 321 are rotatably connected to the telescopic pin 310 through the same rotating shaft 324.

[0035] In the above implementation process, compared with directly increasing the dimensions of the unlocking component 320 and the unlocking surface 323 in the axial direction of the rotation axis 324, this application sets the unlocking component 320 into a structure of unlocking plates 321 disposed on both sides of the telescopic pin 310 in the axial direction. This not only increases the support points between the unlocking component 320 and the push rod 200, but also makes it lighter in weight, which can effectively improve the stability of the cooperation between the unlocking component 320 and the push rod 200, and improve the user's operating experience.

[0036] In one possible implementation, the unlocking mechanism 300 further includes a pin sleeve 350, which includes a guide portion 351 and a mounting portion 352. The guide portion 351 is installed inside the push rod 200 and has a through hole. The telescopic pin 310 is slidably installed in the through hole. The mounting portion 352 is located outside the push rod 200 and is fixedly installed to the push rod 200 by bolts 354.

[0037] To reduce the overall weight, the push rod 200 is generally a hollow rod. Therefore, this application provides a pin sleeve 350 to fill the push rod 200 to guide the sliding of the telescopic pin 310. The telescopic pin 310 is slidably installed in the through hole on the pin sleeve 350, and the mounting part 352 of the pin sleeve 350 is fixed to the push rod 200 by bolts 354.

[0038] In one possible implementation, the unlocking mechanism 300 further includes a first elastic element disposed between the unlocking member 320 and the push rod 200, and in contact with or connected to the unlocking member 320 and the push rod 200, for applying an elastic force to the unlocking member 320 to drive the telescopic pin 310 closer to the fixed plate 110.

[0039] During the above implementation process, the operating component 400 drives the telescopic pin 310 away from the fixed plate 110 and disengages from the positioning hole 120, thereby unlocking the push rod 200. In order to improve the operating experience and achieve automatic locking of the push rod 200, a first elastic element is provided between the unlocking component 320 and the push rod 200. When there is no external force acting on the operating component 400, the first elastic element can drive the telescopic pin 310 closer to the fixed plate 110. When the push rod 200 rotates to a predetermined angle, the telescopic pin 310 automatically extends into the positioning hole 120 under the action of the first elastic element to achieve locking.

[0040] Optionally, the first elastic element is a spring. According to the structural design of the unlocking element 320, the first elastic element can exert either a pulling force or a pushing force on the unlocking element 320. When the first elastic element exerts a pulling force on the unlocking element 320, both ends of the first elastic element are connected to the unlocking element 320 and the push rod 200, respectively. When the first elastic element exerts a pushing force on the unlocking element 320, such as a compression spring, both ends of the first elastic element can be directly connected to the unlocking element 320 and the push rod 200, or they can simply abut against the unlocking element 320 and the push rod 200.

[0041] In one possible implementation, such as Figure 4-6 As shown, the unlocking mechanism 300 further includes a second elastic element 340, which is disposed between the telescopic pin 310 and the push rod 200, and abuts against or connects with the telescopic pin 310 and the push rod 200, for applying an elastic force toward the fixed plate 110 to the telescopic pin 310.

[0042] In the above implementation process, in order to automatically lock the telescopic pin 310, a second elastic element 340 can also be directly provided between the telescopic pin 310 and the push rod 200. Specifically, the second elastic element 340 can be a spring, which can be directly sleeved on the telescopic pin 310 and located in the through hole on the pin sleeve 350. One end of the spring abuts against the telescopic pin 310, and the other end abuts against the pin sleeve 350 on the push rod 200.

[0043] In one possible implementation, the unlocking mechanism 300 further includes a housing 360, which is fixedly mounted on the push rod 200 and cooperates with the push rod 200 to form a receiving cavity, the receiving cavity containing the unlocking mechanism 300.

[0044] In the above implementation process, a housing 360 is provided on the push rod 200, and the unlocking component 320 and telescopic pin 310 are housed in the housing 360, which can protect the unlocking mechanism 300 and prevent external sand and gravel from damaging the unlocking mechanism 300.

[0045] Optionally, one end of the second elastic member 340 can indirectly abut against the push rod 200 by abutting against the housing 360, that is, one end of the second elastic member 340 abuts against the housing 360 and the other end abuts against the telescopic pin 310.

[0046] In one possible implementation, such as Figure 1 , Figure 2 and Figure 8 As shown, the end of the push rod 200 away from the host 100 is provided with a user engagement portion 500, and the operating member 400 is provided on the user engagement portion 500, or the operating member 400 is provided adjacent to the user engagement portion 500.

[0047] It should be understood that the aforementioned user engagement portion 500 can be a gripping part for the operator to push the push rod 200, or it can be a part equipped with various switches that control the functions of the host 100, such as a trigger or a push rod 200 extension / retraction unlocking switch. The aforementioned operating element 400 being located near the user engagement portion 500 means that when the push rod 200 is extended, it is positioned so that the user can reach it while standing or slightly leaning forward. For example, it could be located on the upper half of the push rod 200 near the user engagement portion 500. To improve the stability of the push rod 200, a crossbar 600 is generally provided between the two push rods 200. The two ends of the crossbar 600 are connected to the two push rods 200 respectively, and the crossbar 600 is located near the middle position in the extension direction of the push rod 200. The operating element 400 can be located on the crossbar 600 near the user engagement portion 500.

[0048] In the above implementation process, the operating component 400 is set on or near the user joint 500, so that the operator can adjust the angle of the push rod 200 in a standing or slightly bent-over posture, which effectively improves the user experience.

[0049] In one possible implementation, the unlocking mechanism 300 further includes a flexible strip 370, with the two ends of the flexible strip 370 connected to the operating member 400 and the unlocking member 320, respectively.

[0050] Specifically, the flexible strip 370 can be made of steel wire rope, nylon rope, etc., so as to link the unlocking component 320 and the operating component 400 which are separated by a certain distance.

[0051] Optionally, the operating component 400 is slidably mounted on the crossbar 600, and the crossbar 600 is also provided with a transmission component 610. The transmission component 610 is rotatably mounted on the crossbar 600, with one end abutting or connecting to the operating component 400 and the other end connected to a steel wire rope. When the operator presses down on the operating component 400, the end of the transmission component 610 connected to the steel wire rope is lifted, thereby pulling the unlocking component 320 to rotate.

[0052] Optionally, the axis of the telescopic pin 310 is perpendicular to the extension direction of the push rod 200, and the unlocking member 320 and the wire rope can link the sliding movement of the operating member 400 to the sliding movement of the telescopic pin 310 perpendicular to the push rod 200.

[0053] In one possible implementation, such as Figure 8 As shown, the garden tool also includes an operating component 400, two push rods 200 and two unlocking mechanisms 300. The two unlocking mechanisms 300 are respectively located on the two push rods 200, and the operating component 400 is connected to the two unlocking mechanisms 300 respectively.

[0054] In the above implementation process, to improve the stability of the push rods 200, two push rods 200 are generally arranged on the left and right sides of the main unit 100. To further enhance the stability of the push rods 200 during folding and locking, this application provides an unlocking mechanism 300 on each push rod 200, and uses a single operating component 400 to operate both unlocking mechanisms 300 simultaneously. The user only needs to operate the operating component 400 to unlock both push rods 200 simultaneously, effectively improving the user experience.

[0055] Specifically, in scenarios where the operating component 400 is positioned far from the unlocking mechanism 300 and the telescopic pin 310 is perpendicular to the push rod 200, the structure of the unlocking component 320 rotating against the push rod 200 can convert the vertical sliding motion of the telescopic pin 310 relative to the push rod 200 into the rotational motion of the unlocking component 320. The operating component 400 and the unlocking component 320 are connected by a flexible strip such as a steel wire rope, thus converting the rotation of the unlocking component 320 into the rotation or sliding of the operating component 400, facilitating user operation. Furthermore, with the unlocking surface 323 of the unlocking component 320 being a smooth curved surface, compared to a linkage hinge structure, the entire transmission structure from the operating component 400 to the unlocking component 320 and then to the telescopic pin 310 is simple and stable, occupies less space, has fewer hinge points, and provides smooth and seamless user operation without any jamming.

[0056] This invention is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many alternative solutions to the garden tools of this invention exist without departing from the principles and scope of the invention. The scope of protection of this invention is defined by the claims.

Claims

1. A garden tool, comprising: The host (100) is equipped with a fixing plate (110), and the fixing plate (110) has at least two positioning holes (120). A push rod (200) is rotatably mounted on the main unit (100). Its characteristic is that it further includes: Unlocking mechanism (300), including Telescopic pin (310) is slidably mounted on the push rod (200). The telescopic pin (310) has a locked state that engages with the positioning hole (120) and an unlocked state that disengages from the positioning hole (120). The unlocking component (320) is rotatably connected to the telescopic pin (310) about a first axis. The unlocking component (320) has an unlocking surface (323). The unlocking surface (323) abuts against the push rod (200). When the push rod (200) abuts against the unlocking surface (323), it forms a first contact point and a second contact point. The distance between the first contact point and the first axis is less than the distance between the second contact point and the first axis. An operating element (400) is connected to the unlocking element (320). When the operating element (400) drives the unlocking element (320) to rotate from the first contact point to the second contact point, the telescopic pin (310) disengages from the positioning hole (120) and changes from the locked state to the unlocked state.

2. The garden tool according to claim 1, characterized in that, The unlocking surface (323) is a smooth curved surface, and the unlocking surface (323) is eccentric to the first axis.

3. The garden tool according to claim 1, characterized in that, The first contact point and the second contact point are located on two different planes.

4. The garden tool according to claim 1, characterized in that, The distance from the connection point of the operating element (400) and the unlocking element (320) to the first axis is greater than the distance from the second contact point to the first axis.

5. The garden tool according to claim 1, characterized in that, The telescopic pin (310) is slidably mounted on the push rod (200) in a direction perpendicular to the axis of the push rod (200).

6. The garden tool according to claim 1, characterized in that, The unlocking component (320) includes a connecting plate (322) and at least two unlocking plates (321). The connecting plate (322) connects at least two of the unlocking plates (321). The at least two unlocking plates (321) are respectively disposed on both sides of the telescopic pin (310). Each unlocking plate (321) is provided with an unlocking surface (323) that abuts against the push rod (200). The at least two unlocking plates (321) are rotatably connected to the telescopic pin (310) through the same rotating shaft (324).

7. The garden tool according to claim 1, characterized in that, The unlocking mechanism (300) further includes a pin sleeve (350), which includes a guide portion (351) and a mounting portion (352). The guide portion (351) is installed inside the push rod (200) and has a through hole. The telescopic pin (310) is slidably installed in the through hole. The mounting portion (352) is located outside the push rod (200) and is fixedly installed to the push rod (200) by bolts (354).

8. The garden tool according to claim 1, characterized in that, The unlocking mechanism (300) further includes a first elastic element, which is disposed between the unlocking member (320) and the push rod (200) and abuts against or connects with the unlocking member (320) and the push rod (200); and / or, The unlocking mechanism (300) further includes a second elastic element (340), which is disposed between the telescopic pin (310) and the push rod (200) and abuts against or connects with the telescopic pin (310) and the push rod (200).

9. The garden tool according to claim 1, characterized in that, The unlocking mechanism (300) also includes a housing (360), which is fixedly mounted on the push rod (200) and cooperates with the push rod (200) to form a receiving cavity, which contains the unlocking mechanism (300).

10. The garden tool according to claim 1, characterized in that, It also includes an operating element (400), two push rods (200) and two unlocking mechanisms (300), with the two unlocking mechanisms (300) respectively disposed on the two push rods (200), and the operating element (400) connected to the two unlocking mechanisms (300) respectively. The unlocking mechanism (300) further includes a flexible strip (370), one end of which is connected to the unlocking member (320) and the other end is connected to the operating member (400). The push rod (200) has a user engagement portion (500) at one end away from the host (100), and the operating element (400) is disposed on or adjacent to the user engagement portion (500).

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