Handrail adjusting structure and method suitable for hand-push type mower

Abstract

The invention discloses a handrail adjusting structure and method suitable for a hand-push type mower, and belongs to the technical field of mower equipment, the handrail adjusting structure comprises a positioning mechanism and a locking mechanism, the positioning mechanism comprises a positioning disc and a limiting hole; wherein the two positioning discs are installed on the two sides of the root of the handrail respectively, and the multiple limiting holes are formed in the positioning discs. The locking mechanism comprises a locking frame, a rotating disc, a first locking pin, a second locking pin, a connecting part and an inhaul cable; the locking frame is installed on the mower, the rotating disc is connected to the locking frame, the first locking pin and the second locking pin are connected to the rotating disc in an inserted mode, the connecting part is installed on the locking frame, the inhaul cable penetrates through the connecting part and is fixedly connected with the rotating disc, and the rotating disc is driven by the inhaul cable to rotate relative to the locking frame. By means of linkage among the inhaul cable, the locking mechanism and the positioning mechanism, the difficulty of locking and unlocking during height adjustment of the handrail is lowered.

Description

Technical Field

[0001] The invention belongs to the technical field of lawn mower equipment, and in particular relates to an armrest adjustment structure and an adjustment method suitable for a hand-push lawn mower. Background Art

[0002] The armrest of a push lawn mower needs to be adjusted according to the height of the user. There are various designs for the height adjustment of the armrest, including folding and telescopic types. The above armrests need to be equipped with corresponding locking devices when adjusting to achieve a fixed height after adjustment; the existing locking devices have complex structures and are laborious to lock and unlock the armrests, and most of them require the use of professional tools to unlock the armrests.

[0003] Secondly, some existing locking devices often become loose or fail due to the vibration of the lawn mower during operation, resulting in the safety hazard of the armrest shaking and falling, seriously affecting the user experience.

[0004] Finally, the existing push-type lawn mowers occupy a large area, and the use of the above-mentioned armrest design still does not improve the space utilization rate. The storage problem of the lawn mower is an important factor affecting its sales. Summary of the invention

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an armrest adjustment structure and adjustment method suitable for a push-type lawn mower, which can greatly reduce the difficulty of adjusting the height of the armrest through the cooperation of a positioning mechanism and a locking mechanism.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides an armrest adjustment structure suitable for a push-type lawn mower, comprising a positioning mechanism and a locking mechanism; The positioning mechanism comprises two positioning plates respectively installed on both sides of the root of the handrail and a plurality of limiting holes formed on the positioning plates; The locking mechanism comprises a locking frame mounted on the lawn mower, a rotating disk connected to the locking frame, a first locking pin and a second locking pin respectively plugged into the rotating disk, a connecting portion mounted on the locking frame, and a cable passing through the connecting portion and fixed to the rotating disk; Among them, when the cable is subjected to force, the rotating disk rotates relative to the locking frame driven by the cable, so that the first locking pin and the second locking pin respectively move axially and retract into the interior of the lawn mower body as the rotating disk rotates, thereby releasing the limitation on the positioning disk. When there is no external force on the cable, the rotating disk resets and drives the first locking pin and the second locking pin to extend outward at the same time, until they reach the limit and engage with the limit holes on the positioning disk, thereby locking the positioning disk.

[0007] Optionally, the base of the handrail is rotatably mounted on both sides of the lawn mower; and through holes facing the locking pin and the positioning plate are respectively opened on both sides of the lawn mower.

[0008] Optionally, the positioning plate is fixedly connected to the armrest, and a plurality of limiting holes on the positioning plate are located on the same arc corresponding to the locking pin.

[0009] Optionally, the locking frame includes a cover plate connected to the lawn mower body, a support plate connected to the inner side of the cover plate, and a vertical plate installed on the inner side of the support plate; The vertical plate and the rotating disk are respectively provided with corresponding connecting holes. The vertical plate and the rotating disk are rotatably connected via a connecting shaft, and a first spring is sleeved on the connecting shaft to enable the rotating disk to quickly reset.

[0010] Optionally, the rotating disk is a special-shaped part, and a stop block facing the support plate is provided on the top of the rotating disk, which can limit the rotation angle of the rotating disk.

[0011] Optionally, one end of the cable is connected to the rotating disk via a positioning pin, and the other end of the cable passes through a locking frame and is connected to an operating mechanism; wherein the positioning pin is installed on a side away from the connecting hole, which can maximize the torque of the rotating disk and improve the sensitivity of the rotating disk.

[0012] Optionally, one end of the first locking pin and the second locking pin are respectively inserted into the mounting hole of the rotating disk, and the other ends are respectively close to or inserted into the through holes on both sides of the lawn mower; The mounting holes include a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are located at upper and lower sides of the connecting hole.

[0013] Optionally, the first locking pin and the second locking pin are also plugged into the auxiliary support frame respectively; The first locking pin and the second locking pin are both two-section structures, the first locking pin and the second locking pin close to the rotating disk are inclined sections, and the first locking pin and the second locking pin close to the auxiliary support frame are axially opposite straight sections; The height of the auxiliary support frame is between the first mounting hole and the second mounting hole; A second spring is provided on one side of the auxiliary support frame facing the through hole of the lawn mower, which is used to buffer the axial impact and energy storage of the first locking pin and the second locking pin.

[0014] Optionally, the operating mechanism is disposed on the armrest, not limited to the bottom, top or any position on the armrest, and the force applying member of the operating mechanism is not limited to any one of a pull rod, a rocker or a button.

[0015] In a second aspect, the present invention provides an armrest adjustment method applicable to a push-type lawn mower, based on the above-mentioned armrest adjustment structure, the plurality of limit holes include: a working limit hole and a storage limit hole; The working limit hole is located on one side of the positioning plate, and the storage limit hole includes: a first storage limit hole and a second storage limit hole; the first storage limit hole is close to the middle of the positioning plate, and the second storage limit hole is located on a side away from the working limit hole; The armrest adjustment method is as follows: a force is applied to the cable, and the rotating disk is driven by the cable to rotate relative to the locking frame, so that the first locking pin and the second locking pin are axially moved and retracted into the body of the lawn mower respectively with the rotation of the rotating disk, thereby releasing the limitation of the current working limit hole or the storage limit hole; Rotate the armrest so that another working limit hole or storage limit hole on the positioning plate is axially aligned with the first locking pin and the second locking pin; The force acting on the cable is cancelled, the rotating disk is reset, and the first locking pin and the second locking pin are simultaneously extended outward until they are plugged into another working limit hole or storage limit hole on the positioning disk at the limit, thereby achieving locking of the armrest after height adjustment or storage adjustment; When the first locking pin and the second locking pin are directly switched with different working limit holes, the handrail can be adjusted to different heights; When the first locking pin and the second locking pin are plugged into the first storage limit hole, the armrest is vertically fixed on the lawn mower, so that the horizontal space occupied by the lawn mower is minimized; When the first locking pin and the second locking pin are plugged into the second storage limit hole, the armrest is folded and fixed on the lawn mower at the lowest position, so that the longitudinal space occupied by the lawn mower is minimized.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The locking mechanism is driven by a cable to switch the unlocking and locking of the positioning mechanism, which assists in the multi-angle adjustment of the armrest and locks the armrest after adjustment, thereby improving the stability of the armrest after adjustment and reducing the difficulty of unlocking and locking the armrest, meeting the need for quick switching of the armrest to different heights when in use, and also meeting the need for folding the armrest when it is stored.

[0017] The locking mechanism is concise in design and has high adjustment sensitivity. When the cable applies tension, the cable drives the rotating disk to rotate, driving the first locking pin and the second locking pin to retract inward and disengage from the limit hole respectively, thereby releasing the limit on the armrest. When the cable has no force, the rotating disk rotates and resets, driving the first locking pin and the second locking pin to extend outward and plug into the limit hole respectively, thereby re-locking the armrest. Compared with other locking components, it will not produce axial displacement with the vibration of the lawn mower, thereby avoiding locking failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a hand-push lawn mower of the present invention.

[0019] Figure 2 It is a schematic diagram of the installation of the armrest adjustment structure of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the positioning mechanism of the present invention.

[0021] Figure 4 It is a schematic diagram of unlocking the locking mechanism of the present invention.

[0022] Figure 5 It is a locking schematic diagram of the locking mechanism of the present invention.

[0023] Figure 6 It is a side view of the locking mechanism of the present invention.

[0024] Figure 7 It is an embodiment diagram of the hand-push lawn mower handrail in working state of the present invention.

[0025] Figure 8 This is an embodiment of the hand-push lawn mower of the present invention in the stowed state of the armrest Figure 1 .

[0026] Fig. 9 This is an embodiment of the hand-push lawn mower of the present invention in the stowed state of the armrest Figure 2 .

[0027] In the figure: 1-armrest; 2-mower body; 201-cover plate; 3-positioning mechanism; 301-positioning plate; 302-working limit hole; 303-storage limit hole; 4-locking mechanism; 401-locking frame; 4011-support plate; 4012-vertical plate; 4013-connecting hole; 4014-connecting shaft; 4015-first spring; 402-rotating plate; 4021-stop block; 4022-first mounting hole; 4023-second mounting hole; 403-first locking pin; 404-second locking pin; 405-connecting part; 406-pull cable; 5-auxiliary support frame; 501-second spring. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example

[0029] This embodiment provides an adjustment structure of the armrest 1 applicable to a push-type lawn mower, such as Figures 1 to 6The figure shows a positioning mechanism 3 and a locking mechanism 4; the positioning mechanism 3 comprises: a positioning disk 301 and a limiting hole; wherein the number of the positioning disks 301 is two, and the two positioning disks 301 are respectively mounted on both sides of the root of the handrail 1, and the number of the limiting holes is multiple, and multiple limiting holes are opened on the positioning disk 301; the locking mechanism 4 comprises: a locking frame 401, a rotating disk 402, a first locking pin 403, a second locking pin 404, a connecting portion 405 and a cable 406; the locking frame 401 is mounted on the lawn mower, the rotating disk 402 is connected to the locking frame 401, the first locking pin 403 and the second locking pin 404 are respectively plugged into the rotating disk 402, the connecting portion 405 is mounted on the locking frame 401, and the cable 406 passes through the connecting portion 405 and is fixedly connected to the rotating disk 402.

[0030] When the cable 406 is subjected to force, the rotating disk 402 rotates relative to the locking frame 401 driven by the cable 406, so that the first locking pin 403 and the second locking pin 404 respectively move axially and retract into the inside of the lawn mower body 2 as the rotating disk 402 rotates, releasing the limitation on the positioning disk 301. When there is no external force on the cable 406, the rotating disk 402 resets and drives the first locking pin 403 and the second locking pin 404 to extend outward until they reach the limit and are plugged into the limiting holes on the positioning disk 301, thereby locking the positioning disk 301.

[0031] Optionally, the base of the armrest 1 is rotatably mounted on both sides of the lawn mower; and through holes facing the locking pin and the positioning plate 301 are respectively opened on both sides of the lawn mower.

[0032] Optionally, the positioning plate 301 is fixedly connected to the armrest 1, and the plurality of limiting holes on the positioning plate 301 are located on the same arc corresponding to the locking pin, which can meet the adjustment requirements of the armrest 1 during operation and storage. The plurality of limiting holes are distributed as follows: Figure 3 shown.

[0033] Optionally, the locking frame 401 includes: a cover plate 201, a support plate 4011 and a vertical plate 4012; wherein the cover plate 201 is connected to the body of the lawn mower to play a protective and aesthetic role, and the installation of the cover plate 201 is as follows Figure 1 As shown, the support plate 4011 is connected to the inner side of the cover plate 201, and the vertical plate 4012 is installed on the inner side of the support plate 4011; corresponding connection holes 4013 are respectively opened on the vertical plate 4012 and the rotating disk 402, and the vertical plate 4012 and the rotating disk 402 are rotatably connected through a connecting shaft 4014, and a first spring 4015 is sleeved on the connecting shaft 4014, which can quickly reset the rotating disk 402 and improve the sensitivity of the locking mechanism 4 when locked, as shown in FIG. Figure 6 The two ends of the first spring 4015 are also fixed to the vertical plate 4012 and the rotating disk 402 respectively.

[0034] Optionally, the rotating disk 402 is a special-shaped part, and a stop block 4021 facing the support plate 4011 is provided on the top of the rotating disk 402 to limit the rotation angle of the rotating disk 402, thereby limiting the movement stroke of the first locking pin 403 and the second locking pin 404.

[0035] Optionally, one end of the cable 406 is connected to the rotating disk 402 through a positioning pin, and the other end of the cable 406 passes through the locking frame 401 and is connected to the operating mechanism; wherein the positioning pin is installed on the side away from the connecting hole 4013, which can maximize the torque of the rotating disk 402 without the aid of complex tools and force-applying devices.

[0036] Optionally, one end of the first locking pin 403 and the second locking pin 404 are respectively inserted into the mounting holes of the rotating disk 402, and the other ends are respectively close to or inserted into the through holes on both sides of the lawn mower; The mounting holes include a first mounting hole 4022 and a second mounting hole 4023 , and the first mounting hole 4022 and the second mounting hole 4023 are located at upper and lower sides of the connecting hole 4013 , so that the first mounting hole 4022 and the second mounting hole 4023 move in opposite directions during rotation.

[0037] Optionally, the first locking pin 403 and the second locking pin 404 are also plugged into the auxiliary support frame 5 respectively; the first locking pin 403 and the second locking pin 404 are both two-section structures, the first locking pin 403 and the second locking pin 404 close to the rotating disk 402 are inclined sections, and the first locking pin 403 and the second locking pin 404 close to the auxiliary support frame 5 are axially corresponding straight sections; the height of the auxiliary support frame 5 is located between the first mounting hole 4022 and the second mounting hole 4023; a second spring 501 is provided on the side of the auxiliary support frame 5 facing the through hole of the lawn mower, which is used to buffer the axial impact and energy storage of the first locking pin 403 and the second locking pin 404; The first mounting hole 4022 and the second mounting hole 4023 are approximately rounded rectangular holes. Figure 4 and Figure 5As shown, the ends of the first locking pin 403 and the second locking pin 404 are respectively installed with stop plates, which abut against the first mounting hole 4022 and the second mounting hole 4023. When the inclined section rotates with the rotating disk, the first locking pin 403 and the second locking pin 404 slide along the first mounting hole 4022 and the second mounting hole 4023 respectively, and a part of the longitudinal force is offset during sliding, thereby preventing the rotating disk mounting holes from being deformed due to long-term uneven force, affecting the service life of the equipment; through the deformation and design of the above structure, the rotating force drives the inclined section to rotate, and the rotating force provides the first locking pin 403 and the second locking pin 404 with a longitudinal force and a lateral force respectively, and a part of the downward or upward force is offset by the sliding connection between the inclined section and the mounting hole, leaving only the lateral force, thereby driving the straight sections of the first locking pin 403 and the second locking pin 404 to perform synchronous and reverse linear motions respectively.

[0038] Optionally, the operating mechanism is installed on the armrest 1, not limited to the bottom, top and any position on the armrest 1, and the force applying member of the operating mechanism is not limited to any one of a pull rod, a rocker and a button. Example

[0039] This embodiment provides an armrest adjustment method and an armrest adjustment structure applicable to a push-type lawn mower. The armrest adjustment structure is as follows: Figure 7 , Figure 8 and Fig. 9 As shown, it includes a positioning mechanism 3 and a locking mechanism 4; the positioning mechanism 3 includes: a positioning disk 301 and a limiting hole; wherein the number of the positioning disks 301 is two, and the two positioning disks 301 are respectively installed on both sides of the root of the armrest 1, and the number of the limiting holes is multiple, and the multiple limiting holes are opened on the positioning disk 301, and the multiple limiting holes are specifically working limiting holes 302 and storage limiting holes 303; the number of the working limiting holes 302 is not limited, and the working limiting holes 302 are located on the side of the positioning disk 301 close to the locking mechanism 4, and the storage limiting holes 303 include a first storage limiting hole 303 that enables the armrest 1 to be vertically opposite to the lawn mower body 2 and a second storage limiting hole 303 that enables the armrest 1 to be folded on the lawn mower in the lowest position, the first storage limiting hole 303 is close to the middle of the positioning disk 301, and the second storage limiting hole 303 is located on the side away from the working limiting hole 302. When the armrest 1 is perpendicular to the lawn mower body 2, the lawn mower can occupy the smallest horizontal space; when the armrest 1 is folded and fixed on the lawn mower body 2 in the lowest position, the lawn mower can occupy the smallest longitudinal space, thereby being suitable for more than one storage space and meeting diversified storage needs.

[0040] The locking mechanism 4 includes: a locking frame 401, a rotating disk 402, a first locking pin 403, a second locking pin 404, a connecting portion 405 and a cable 406; the locking frame 401 is installed on the lawn mower, the rotating disk 402 is connected to the locking frame 401, the first locking pin 403 and the second locking pin 404 are respectively inserted into the rotating disk 402, the connecting portion 405 is installed on the locking frame 401, and the cable 406 passes through the connecting portion 405 and is fixedly connected to the rotating disk 402.

[0041] Working principle: When the lawn mower is working, the height of the armrest 1 is adjusted, and the operating mechanism applies a force to the cable 406. After the cable 406 is subjected to the force, the rotating disk 402 rotates relative to the locking frame 401 under the drive of the cable 406, so that the first locking pin 403 and the second locking pin 404 are respectively retracted into the inside of the lawn mower body 2 as the rotating disk 402 rotates, and the limitation on the positioning disk 301 is released. The armrest 1 is rotated to make the corresponding working limit holes 302 on the positioning disk 301 axially correspond to the first locking pin 403 and the second locking pin 404, and then the force is canceled. The rotating disk 402 is reset and drives the first locking pin 403 and the second locking pin 404 to extend outwards until they are plugged into the working limit holes 302 on the positioning disk 301 at the limit, and finally the armrest 1 is fixed at different heights.

[0042] When the lawn mower is stored, the operating mechanism also acts on the cable 406 to apply a force. After the cable 406 is subjected to the force, the rotating disk 402 rotates relative to the locking frame 401 under the drive of the cable 406, so that the first locking pin 403 and the second locking pin 404 are respectively retracted into the interior of the lawn mower body 2 as the rotating disk 402 rotates, releasing the limitation on the positioning disk 301, and rotating the armrest 1 so that the corresponding first storage limit hole 303 or the second storage limit hole 303 on the positioning disk 301 is axially aligned with the first locking pin 403 and the second locking pin 404. Then, the force is canceled, the rotating disk 402 is reset, and at the same time, the first locking pin 403 and the second locking pin 404 are driven to extend outward until they are plugged into the first storage limit hole 303 or the second storage limit hole 303 on the positioning disk 301 at the limit, finally realizing the vertical fixation of the armrest 1 and the folding and fixation of the armrest 1 in the lowest position, thereby meeting the storage needs of different families and users.

[0043] To summarize, the locking mechanism 4 is driven by the pull cable 406 to switch between unlocking and locking the positioning mechanism 3, thereby assisting the multi-angle adjustment of the armrest 1, and locking the armrest 1 after adjustment, thereby improving the stability of the armrest 1 after adjustment and reducing the difficulty of unlocking and locking the armrest 1, meeting the need for quickly switching between different heights of the armrest 1 when in use, and at the same time meeting the need for folding the armrest 1 when it is stored.

[0044] The locking mechanism 4 is designed to be simple and has high adjustment sensitivity. When the cable 406 applies tension, the cable 406 drives the rotating disk 402 to rotate, driving the first locking pin 403 and the second locking pin 404 to retract inward and disengage from the limiting hole respectively, thereby releasing the limit on the armrest 1. When the cable 406 has no force, the rotating disk 402 rotates and resets to drive the first locking pin 403 and the second locking pin 404 to extend outward and plug into the limiting hole respectively, thereby re-locking the armrest 1. Compared with locking components with screwed or riveted elements, it will not loosen due to the vibration of the lawn mower, thus avoiding failure of the locking pin or axial displacement, and has a more stable locking effect.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

Claims

1. An armrest adjustment structure suitable for a push lawn mower, characterized in that: including a positioning mechanism and a locking mechanism; The positioning mechanism comprises two positioning plates respectively installed on both sides of the root of the handrail and a plurality of limiting holes formed on the positioning plates; The locking mechanism comprises a locking frame mounted on the lawn mower, a rotating disk connected to the locking frame, a first locking pin and a second locking pin respectively plugged into the rotating disk, a connecting portion mounted on the locking frame, and a cable passing through the connecting portion and fixed to the rotating disk; Among them, when the cable is subjected to force, the rotating disk rotates relative to the locking frame driven by the cable, so that the first locking pin and the second locking pin respectively move axially and retract into the interior of the lawn mower body as the rotating disk rotates, thereby releasing the limitation on the positioning disk. When there is no external force on the cable, the rotating disk resets and drives the first locking pin and the second locking pin to extend outward at the same time, until they reach the limit and engage with the limit holes on the positioning disk, thereby locking the positioning disk.

2. The armrest adjustment structure for a push-type lawn mower according to claim 1, characterized in that: The base of the handrail is rotatably mounted on both sides of the lawn mower; and through holes facing the locking pin and the positioning plate are respectively opened on both sides of the lawn mower.

3. The armrest adjustment structure for a push-type lawn mower according to claim 1, characterized in that: The positioning plate is fixedly connected to the armrest, and a plurality of limiting holes on the positioning plate are located on the same arc corresponding to the locking pin.

4. The armrest adjustment structure for a push-type lawn mower according to claim 1, characterized in that: The locking frame includes a cover plate connected to the lawn mower body, a support plate connected to the inner side of the cover plate, and a vertical plate installed on the inner side of the support plate; The vertical plate and the rotating disk are respectively provided with corresponding connecting holes. The vertical plate and the rotating disk are rotatably connected via a connecting shaft, and a first spring is sleeved on the connecting shaft to provide a pre-tightening force for the rotating disk to quickly reset it.

5. The armrest adjustment structure for a push-type lawn mower according to claim 4, characterized in that: The rotating disk is a special-shaped part, and a stop block facing the support plate is provided on the top of the rotating disk to limit the rotation angle of the rotating disk.

6. The armrest adjustment structure for a push-type lawn mower according to claim 5, characterized in that: One end of the cable is connected to the rotating disk through a positioning pin, and the other end of the cable passes through the locking frame and is connected to the operating mechanism; wherein the positioning pin is installed on a side away from the connecting hole.

7. The armrest adjustment structure for a push-type lawn mower according to claim 2, characterized in that: One end of the first locking pin and the second locking pin are respectively inserted into the mounting hole of the rotating disk, and the other ends are respectively close to or inserted into the through holes on both sides of the lawn mower; The mounting holes include a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are located at upper and lower sides of the connecting hole.

8. The armrest adjustment structure for a push-type lawn mower according to claim 7, characterized in that: The first locking pin and the second locking pin are also plugged into the auxiliary support frame respectively; The first locking pin and the second locking pin are both two-section structures, the first locking pin and the second locking pin close to the rotating disk are inclined sections, and the first locking pin and the second locking pin close to the auxiliary support frame are axially opposite straight sections; The height of the auxiliary support frame is between the first mounting hole and the second mounting hole; A second spring is provided on one side of the auxiliary support frame facing the through hole of the lawn mower, which is used to buffer the axial impact and energy storage of the first locking pin and the second locking pin.

9. The armrest adjustment structure for a push-type lawn mower according to claim 6, characterized in that: The operating mechanism is arranged on the armrest, and is not limited to the bottom, top or any position on the armrest, and the force applying member of the operating mechanism is not limited to any one of a pull rod, a rocker or a button.

10. A method for adjusting the armrest of a push lawn mower, characterized in that: Based on the armrest adjustment structure of claim 1, the plurality of limit holes include: a working limit hole and a storage limit hole; The working limit hole is located on one side of the positioning plate, and the storage limit hole includes: a first storage limit hole and a second storage limit hole; the first storage limit hole is close to the middle of the positioning plate, and the second storage limit hole is located on a side away from the working limit hole; The armrest adjustment method is as follows: a force is applied to the cable, and the rotating disk is driven by the cable to rotate relative to the locking frame, so that the first locking pin and the second locking pin are axially moved and retracted into the body of the lawn mower respectively with the rotation of the rotating disk, thereby releasing the limitation of the current working limit hole or the storage limit hole; Rotate the armrest so that another working limit hole or storage limit hole on the positioning plate is axially aligned with the first locking pin and the second locking pin; The force acting on the cable is cancelled, the rotating disk is reset, and the first locking pin and the second locking pin are simultaneously extended outward until they are plugged into another working limit hole or storage limit hole on the positioning disk at the limit, thereby achieving locking of the armrest after height adjustment or storage adjustment; When the first locking pin and the second locking pin are directly switched with different working limit holes, the handrail can be adjusted to different heights; When the first locking pin and the second locking pin are plugged into the first storage limit hole, the armrest is vertically fixed on the lawn mower, so that the horizontal space occupied by the lawn mower is minimized; When the first locking pin and the second locking pin are plugged into the second storage limit hole, the armrest is folded and fixed on the lawn mower at the lowest position, so that the longitudinal space occupied by the lawn mower is minimized.

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