Telescopic structure and lawn mower

Abstract

The utility model relates to the field of gardening tools, and particularly discloses a telescopic structure and a lawn mower. The telescopic structure comprises a rod part, a shell arranged on the outer side of the rod part in a sleeving mode, a linkage piece rotationally installed in the shell, a safety switch installed in the shell and a locking handle rotationally connected with the shell; one end of the locking handle extends into the shell and is rotationally connected with the shell, and the other end of the locking handle extends out of the shell. According to the locking handle, locking and loosening of the telescopic action of the rod part are controlled through the linkage piece, the linkage piece is hidden in the shell, the end, connected with the linkage piece, of the locking handle is also hidden in the shell, and only part of the end, connected with the linkage piece, of the locking handle is exposed out of the shell; the linkage piece and the locking handle are not prone to being damaged or invalid due to the fact that the linkage piece and the locking handle touch the outside.

Description

Technical Field

[0001] The present application relates to the field of garden tools, and in particular to a telescopic structure and a lawn mower. Background Art

[0002] The lawn mower includes a working part with a blade and a handle. In order to facilitate the adjustment of the working range and storage, the handle is usually connected to the working part through a telescopic rod. The telescopic rod generally includes an outer rod, an inner rod inserted into the outer rod, and a locking member for locking the inner rod.

[0003] Through understanding of relevant technologies, some lawn mowers have telescopic rod structures with two locking parts, both of which are directly exposed outside the telescopic rod. The locking parts are easily damaged in collision, resulting in structural failure;

[0004] Moreover, in some telescopic rod structures, the locking handle needs to be rotated to a fully open state before the inner rod can be extended and retracted up and down. The locking handle has low adjustment sensitivity when controlling the extension and retraction of the inner rod. Utility Model Content

[0005] The purpose of at least one specific implementation mode of the utility model is to solve the defects of the prior art and provide a telescopic structure and a lawn mower.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A telescopic structure, comprising:

[0008] Rod;

[0009] A housing, which is sleeved on the outside of the rod;

[0010] A linkage member, which is rotatably mounted inside the housing;

[0011] A locking handle, one end of which extends into the interior of the housing and is rotatably connected to the housing, and the other end of which extends to the exterior of the housing;

[0012] A safety switch, installed in the housing;

[0013] The working state of the locking handle includes a first state and a second state. When the locking handle is in the first state, the linkage member is away from the rod, the rod is in a retractable state, and the safety switch is in a disconnected state.

[0014] When the locking handle is in the second state, the linkage member is close to the rod portion, the rod portion is in a non-retractable state, and the safety switch is in a conducting state.

[0015] Through the above technical solution, when the locking handle is rotated to the first state, the telescopic state of the rod can be adjusted. In this state, the safety switch is in a disconnected state, and the machine where the telescopic structure is located is in a state where it cannot be started, thereby ensuring the safety of the machine operation. When the locking handle is rotated to the second state, the rod is in a locked state, and its length cannot be telescopically adjusted. In this state, the safety switch is in a conducting state, and the machine where the telescopic structure is located can be started. In this design, the locking handle controls the locking and releasing of the telescopic action of the rod through a linkage part. The linkage part is hidden in the shell, and the end of the locking handle connected to the linkage part is also hidden in the shell, with only a portion exposed to the outside of the shell. During use, the linkage part and the locking handle are not easily touched by the outside world to cause damage or failure.

[0016] Furthermore, the linkage member is rotatably connected to the housing via a first pin shaft, and a torsion spring for controlling the resetting of the linkage member is mounted on the first pin shaft.

[0017] Further, the linkage member includes a stopper portion, a mounting portion and a buckling portion;

[0018] The stopper portion corresponds to the safety switch and is used to control the opening and closing of the safety switch; the buckling portion corresponds to the rod portion and is suitable for buckling on the rod portion; and the mounting portion is suitable for mounting a clamping member.

[0019] Further, the rod portion comprises:

[0020] Inner rod;

[0021] An outer rod, one end of which is sleeved on the outer side of the inner rod;

[0022] Among them, a stop sleeve is installed at the end of the outer rod, and a limit sleeve is sleeved on one end of the inner rod extending into the inner part of the outer rod, and the stop sleeve is snap-fitted and installed inside the shell.

[0023] Through the above technical solution, when one end of the inner rod is extended and retracted inside the outer rod, the limit sleeve at the end of the inner rod will move together in the inner cavity of the outer rod. When the relative stretching length of the inner rod and the outer rod approaches the limit, the end of the limit sleeve on the inner rod will collide with the end of the stop sleeve on the outer rod, thereby preventing the inner rod from being over-stretched and falling out of the outer rod.

[0024] Further, the outer rod and the limiting sleeve are respectively provided with a first hole, and the outer rod, the limiting sleeve and the inner rod are respectively provided with a second hole, wherein the positions of the first holes on the outer rod and the limiting sleeve correspond to each other, and the positions of the second holes on the outer rod, the limiting sleeve and the inner rod correspond to each other;

[0025] When the locking handle is in the second state, the linkage part is close to the rod part, the clamping part on the linkage part passes through the first hole and contacts the outer peripheral surface of the inner rod, and the buckling part of the linkage part passes through the outer rod, the limiting sleeve and the second hole on the inner rod in sequence and bites the inner rod.

[0026] Furthermore, the locking handle is rotatably connected to the shell through a second pin shaft, and the locking handle includes a gripping portion and a matching portion, the matching portion is linked with the linkage member, and the gripping portion extends to the outside of the shell.

[0027] Through the above technical solution, the locking handle only needs to be rotated a certain angle (the mating part does not interfere with the linkage part), and the torsion spring will drive the linkage part to reset to a state away from the rod part, and the inner rod can be extended and retracted up and down. The locking handle has high adjustment sensitivity when controlling the extension and retraction of the inner rod.

[0028] Furthermore, the pressing member is fixedly mounted on the mounting portion of the linkage member, and an elastic member is mounted on one side of the pressing member close to the outer circumference of the inner rod, and the elastic member is adapted to the outer circumference of the inner rod.

[0029] Furthermore, when the locking handle is in the first state, the pressing member and the buckling portion are away from the inner rod, the rod portion is in a retractable state, and at the same time, the stop portion is away from the safety switch, and the safety switch is in an off state;

[0030] When the locking handle is in the second state, the pressing member and the buckling portion are close to the inner rod, the rod portion is in a non-retractable state, and at the same time, the stop portion abuts against the safety switch, and the safety switch is in a conducting state.

[0031] Through the above technical solution, when the locking handle is in the first state, the matching portion is away from the linkage member, and no force is generated on the linkage member at this time, and the inner rod and the outer rod can freely expand and contract. When the locking handle is gradually rotated and reaches the second state, the gradually rotating matching portion abuts against one side of the linkage member and squeezes the linkage member, and the linkage member rotates in the shell around the first pin shaft. At this time, the elastic member on the side of the clamping member on the linkage member penetrates the first hole on the outer rod and the limiting sleeve and abuts against the outer peripheral surface of the inner rod. At the same time, the buckling portion of the linkage member penetrates the second hole on the outer rod and the limiting sleeve and abuts against the outer peripheral surface of the inner rod. The elastic member contacts the outer peripheral surface of the inner rod. When the outer rod is pressed against the engaging portion, the friction resistance between the inner rod and the engaging portion can be increased, and the pressing effect can be further improved. Under the action of the friction resistance, the inner rod cannot be telescopically moved in the outer rod. The design advantage of the second eyelet is that the second eyelet can provide a space for the buckling portion to be placed, so that when the linkage member is squeezed by the matching portion, the linkage member can be completely parallel to the inner rod. The surface of the elastic member installed on the linkage member can basically be completely fitted on the surface of the inner rod, which further improves the friction resistance generated by the fitting of the elastic member and the inner rod. Moreover, after the buckling portion on the linkage member is buckled with the second eyelet, the stability of the linkage member fitting on the outer side of the outer rod is also improved.

[0032] In addition, when the locking handle is gradually rotated and reaches the second state, the linkage part is squeezed by the matching part, and the linkage part rotates around the first pin shaft in the housing, and the stop part on the linkage part contacts the safety switch. In this state, the safety switch is in the on state, and the machine where the telescopic structure is located can be started;

[0033] Furthermore, the stop sleeve is provided with a limiting flange, the shell is formed by splicing two shell units, and two limiting baffles are arranged on the inner wall of the shell unit. After the two shell units are spliced, the limiting baffles are engaged on both sides of the limiting flange.

[0034] The telescopic structure provided by the present application has the following beneficial technical effects compared with the prior art: 1. The locking handle of the present application controls the locking and loosening of the telescopic action of the rod through a linkage member, the linkage member is hidden in the shell, and the end of the locking handle connected to the linkage member is also hidden in the shell, with only a part of it exposed to the outside of the shell. During use, the linkage member and the locking handle are not easy to come into contact with the outside world and cause damage or failure;

[0035] 2. The locking handle of the present application includes a gripping portion and a mating portion, which cooperates with the linkage part. The gripping portion extends to the outside of the shell. The locking handle only needs to be rotated a certain angle (the mating portion does not interfere with the linkage part), and the torsion spring will drive the linkage part to reset to a state away from the rod part, and the inner rod can be extended and retracted up and down. The locking handle has high adjustment sensitivity when controlling the extension and retraction of the inner rod.

[0036] Another technical solution adopted by the present application is to provide a lawn mower, including the above-mentioned telescopic structure.

[0037] After the lawn mower provided by the present application adopts the above telescopic structure, the telescopic structure of the lawn mower is not easily damaged or failed due to contact. At the same time, the locking handle of the lawn mower has high adjustment sensitivity when controlling the extension and retraction of the inner rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 It is a schematic diagram of the structure of the present application in Example 1;

[0040] Figure 2 This is a schematic diagram of the internal structure of the present application in Example 1;

[0041] Figure 3 This is an explosion diagram of the present application in Example 1;

[0042] Figure 4 This is a schematic diagram of the partial structure of the present application in Example 1;

[0043] Figure 5 This is a schematic diagram of the cooperation when the linkage member locks the inner rod in Example 1;

[0044] Figure 6 It is a schematic diagram of the structure when the linkage member is separated from the inner rod in Example 1;

[0045] Figure 7 This is a schematic diagram of the internal structure of the present application in the first state in Example 1;

[0046] Figure 8 This is a schematic diagram of the internal structure of the present application in the second state in Example 1;

[0047] Fig. 9 It is a side schematic diagram of the present application in Example 1;

[0048] Fig.10 for Fig. 9 Schematic diagram of the cross section along line AA;

[0049] Fig.11 Schematic diagram of the structure of the lawn mower in Example 2. DETAILED DESCRIPTION

[0050] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] Example 1

[0052] Reference Figure 1 , Figure 2 A telescopic structure 100 includes a rod 10, a shell 20 sleeved on the outside of the rod 10, a linkage member 30 rotatably installed inside the shell 20, a safety switch 40 installed inside the shell 20, and a locking handle 50 rotatably connected to the shell 20, one end of the locking handle 50 extends into the interior of the shell 20 and is rotatably connected to the shell 20, and the other end extends to the outside of the shell 20.

[0053] In this embodiment, the rod portion 10 is composed of an inner rod 101 and an outer rod 102, one end of the outer rod 102 is sleeved on the outer side of the inner rod 101, in order to avoid exposing the connection gap between the inner rod 101 and the outer rod 102, the housing 20 is installed at the connection position of the inner rod 101 and the outer rod 102, and the linkage member 30 and the locking handle 50 of the present application need to lock the inner rod 101 by cooperating with each other. In addition, in order to ensure the safety of operation, the machine where the telescopic structure is located can be safely started only after the inner rod 101 is completely locked. Therefore, the telescopic structure 100 of the present application includes a safety switch 40;

[0054] Therefore, the present application achieves the purpose of locking and loosening the inner rod 101 through the mutual cooperation of the linkage part 30 and the locking handle 50, and ensures the safety of the machine operation through the linkage cooperation of the safety switch 40 and the linkage part 30. The present application can cleverly cover the linkage part 30, the safety switch 40 and the locking handle 50 through the shell 20, wherein one end of the locking handle 50 extends to the outside of the shell 20, mainly to facilitate a person's hand to hold the locking handle 50 for operation.

[0055] When the rod 10 is telescopically adjusted, the linkage and coordination actions of the linkage member 30 and the locking handle 50 are all performed inside the shell 20, and the linkage and coordination between the linkage member 30 and the safety switch 40 are also performed inside the shell 20. The shell 20 can play a good protective role for the linkage member 30, the safety switch 40 and the locking handle 50, avoiding the problem of damage to each component due to contact.

[0056] The present application is described below in conjunction with the specific working state of the locking handle 50 .

[0057] The working state of the locking handle 50 of the present application includes a first state and a second state. When the locking handle is in the first state, the linkage member 30 is away from the rod 10, the rod 10 is in a retractable state, and the safety switch 40 is in a disconnected state. In this state, the machine where the telescopic structure is located is in a state where it cannot be started, thereby ensuring the safety of the machine operation.

[0058] When the locking handle 50 is in the second state, the linkage 30 is close to the rod 10, the rod 10 is in a non-retractable state, the safety switch 40 is in a conducting state, and the machine where the telescopic structure is located can be started. In this design, the locking handle 50 controls the locking and releasing of the telescopic action of the rod 10 through the linkage 30. The linkage 30 is hidden in the shell 20, and the end of the locking handle 50 connected to the linkage 30 is also hidden in the shell 20, and only a part is exposed to the outside of the shell 20. During use, the linkage 30 and the locking handle 50 are not easily touched by the outside world to cause damage or failure.

[0059] The present application is described in detail below in conjunction with the specific structure.

[0060] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 A stop sleeve 103 is installed at the end of the outer rod 102, and a limit sleeve 104 is installed at one end of the inner rod 101 that extends into the outer rod 102. When one end of the inner rod 101 is extended and retracted inside the outer rod 102, the limit sleeve 104 at the end of the inner rod 101 will move together in the inner cavity of the outer rod 102. When the relative stretching length of the inner rod 101 and the outer rod 102 approaches the limit, the end of the limit sleeve 104 on the inner rod 101 will conflict with the end of the stop sleeve 103 on the outer rod 102, thereby preventing the inner rod 101 from being over-stretched and falling out of the outer rod 102.

[0061] In this embodiment, the stop sleeve 103 is fixedly installed on the end of the outer rod 102 by means of a snap buckle, and the limit sleeve 104 is also fixedly installed on the end of the inner rod 101 by means of a snap buckle. The stop sleeve 103 is snap-fitted and installed inside the shell 20. Specifically, the stop sleeve 103 has a limit flange 105. The shell 20 is formed by splicing two shell units 201. Two limit baffles 202 are provided on the inner wall of the shell unit 201. After the two shell units 201 are spliced ​​together, the limit baffles 202 are snap-fitted on both sides of the limit flange 105, thereby clamping and fixing the stop sleeve 103. Correspondingly, the two shell units 201 can be clamped and fixed on the outside of the outer rod 102 after splicing.

[0062] Furthermore, the linkage member 30 is rotatably connected to the housing 20 via a first pin shaft 60 , and a torsion spring 70 for controlling the linkage member 30 to return to its original position is mounted on the first pin shaft 60 .

[0063] The linkage member 30 includes a stop portion 301, a mounting portion 302 and a snap-fit ​​portion 303, wherein a contact piece 401 is provided on the safety switch 40, the stop portion 301 corresponds to the contact piece 401 of the safety switch 40 and is used to control the opening and closing of the safety switch 40, the snap-fit ​​portion 303 corresponds to the rod portion 10 and is suitable for snapping onto the rod portion 10, and a clamping member 304 is fixedly installed on the mounting portion 302.

[0064] The outer rod 102 and the limiting sleeve 104 are respectively provided with a first hole 106, and the outer rod 102, the limiting sleeve 104 and the inner rod 101 are respectively provided with a second hole 107, wherein the positions of the first hole 106 on the outer rod 102 and the limiting sleeve 104 correspond to each other, and the positions of the second hole 107 on the outer rod 102, the limiting sleeve 104 and the inner rod 101 correspond to each other.

[0065] Further, the locking handle 50 is rotatably connected to the housing 20 via the second pin 80, and the locking handle 50 includes a gripping portion 501 and a matching portion 502, the matching portion 502 is linked with the linkage member 30, and the gripping portion 501 extends to the outside of the housing 20;

[0066] After the linkage member 30, the safety switch 40 and the locking handle 50 are assembled inside the shell 20, each component is located on the outside of the outer rod 102, wherein the linkage member 30 is rotatably connected to the shell 20 through the first pin shaft 60, and the locking handle 50 is rotatably connected to the shell 20 through the second pin shaft 80. The matching portion 502 of the locking handle 50 abuts against the side of the mounting portion 302, the stopping portion 301 and the snap-fit ​​portion 303 are respectively located at both ends of the mounting portion 302, the end face of the stopping portion 301 is an arc surface, the stopping portion 301 corresponds to the contact piece 401 of the safety switch 40, and the snap-fit ​​portion 303 is in a hook shape and is arranged at a position corresponding to the position of the second hole 107.

[0067] In actual operation, a person applies force to the gripping portion 501, and when the locking handle 50 is in the first state, the pressing member 304 and the buckling portion 303 are away from the inner rod 101, and the rod 10 is in a retractable state. At the same time, the stop portion 301 is away from the contact piece 401 of the safety switch 40, and the safety switch 40 is in an off state.

[0068] When a person applies force to the gripping portion 501 and the locking handle 50 is in the second state, the linkage member 30 approaches the rod 10, the pressing member 304 on the linkage member 30 passes through the first hole 106 and contacts the outer peripheral surface of the inner rod 101, and the buckling portion 303 of the linkage member 30 passes through the outer rod 102, the limiting sleeve 104 and the second hole 107 on the inner rod 101 in sequence and engages with the inner rod 101, the rod 10 is in a non-retractable state, and at the same time, the stopping portion 301 contacts the contact piece 401 of the safety switch 40, and the safety switch 40 is in a conducting state.

[0069] During actual operation, when the inner rod 101 is adjusted from a locked state to a freely retractable state, the locking handle 50 only needs to be rotated a certain angle (the matching part 502 does not interfere with the linkage part 30), and the torsion spring 70 drives the linkage part 30 to reset in the direction away from the rod part 10. The limiting state of the inner rod 101 by the linkage part 30 can be quickly eliminated, and the inner rod 101 can be retracted up and down. The locking handle 50 has a high adjustment sensitivity when controlling the retraction of the inner rod 101.

[0070] In some embodiments, an elastic member 305 is installed on the side of the clamping member 304 close to the outer circumference of the inner rod 101. The elastic member 305 is adapted to the outer circumference of the inner rod 101. The material of the elastic member 305 is preferably rubber. When the elastic member 305 contacts the outer circumference of the inner rod 101, the friction resistance between the elastic member 305 and the inner rod 101 can be increased.

[0071] This embodiment is described below in conjunction with the specific working principle.

[0072] Reference Figures 7 to 10(It should be noted that, in order to facilitate the display of the first eyelet 106, Figure 6 The pressing member 304 in the locking handle 50 is hidden), when the locking handle 50 is in the first state, the matching portion 502 is away from the mounting portion 302 of the linkage member 30, and no force is generated on the linkage member 30 at this time, the elastic member 305 and the buckling portion 303 of the linkage member 30 will not approach the inner rod 101, and the inner rod 101 will not be limited or resisted. At this time, the inner rod 101 and the outer rod 102 can be relatively free to expand and contract. When the locking handle 50 is gradually rotated and reaches the second state, the gradually rotating matching portion 502 abuts against one side of the linkage member 30 and squeezes the mounting portion 30 of the linkage member 30. The linkage member 30 rotates around the first pin 60 in the housing 20. At this time, the elastic member 305 on the side of the pressing member 304 on the linkage member 30 penetrates the first hole 106 on the outer rod 102 and the limiting sleeve 104 and contacts the outer peripheral surface of the inner rod 101. At the same time, the buckling portion 303 at the end of the linkage member 30 also rotates. The rotating buckling portion 303 sequentially penetrates the outer rod 102, the limiting sleeve 104 and the second hole 107 on the inner rod 101 and bites with the inner rod 101, thereby limiting the inner rod 101. When the elastic member 305 contacts the outer circumference of the inner rod 101, the friction resistance between the elastic member 305 and the inner rod 101 can be increased, and the pressing effect can be further improved. Under the action of the friction resistance, the inner rod 101 cannot be telescopically moved in the outer rod 102. The design advantage of the second hole 107 is that the second hole 107 can provide a space for the buckle portion 303 to be placed, so that when the linkage member 30 is squeezed by the matching portion 502, the linkage member 30 can be completely parallel to the inner rod 101, and the surface of the elastic member 305 installed on the linkage member 30 is basically The inner rod 101 can be completely fitted on the surface of the inner rod 101, and the friction resistance generated by the fitting of the elastic member 305 and the inner rod 101 is further improved. Moreover, after the buckle portion 303 on the linkage member 30 is buckled with the second eyelet 107, it is equivalent to that the elastic member 305 and the buckle portion 303 can limit the inner rod 101 synchronously, and the limiting strength of the linkage member 30 on the inner rod 101 is higher. When the inner rod 101 is subjected to a large tensile force, it will not be relatively stretched and contracted with the outer rod 102. This also improves the stability of the linkage member 30 on the outer side of the outer rod 102 from the side.

[0073] In addition, when the locking handle 50 gradually rotates and reaches the second state, after the linkage member 30 is squeezed by the matching portion 502, the linkage member 30 will rotate in the shell 20 with the first pin shaft 60 as the center, and the elastic member 305 and the buckling portion 303 will rotate and lock the inner rod 101. At the same time, the stop portion 301 at the other end of the linkage member 30 will also rotate, and the rotating stop portion 301 will abut against the contact piece 401 of the safety switch 40. In this state, the safety switch 40 is in a conducting state, and the machine where the telescopic structure is located can be started. In this case, the inner rod 101 is in a stable locked state, and the safety switch 40 is in a conducting state through the synchronous linkage of the linkage member 30. That is to say, only when the inner rod 101 is in a stable locked state can the safety switch 40 be smoothly turned on, thereby ensuring the safety of the machine operation. It should be noted that the machine corresponding to the telescopic structure 100 in this embodiment can be some garden tools.

[0074] Example 2

[0075] Reference Fig.11 Based on the same technical concept, an embodiment of the present application provides a lawn mower 200, including a main body 210, a handle 220 and the telescopic structure 100 in the above embodiment, the inner rod 101 of the telescopic structure 100 is connected to the handle 220, and the outer rod 102 of the telescopic structure 100 is connected to the main body 210. The telescopic structure 100 of the lawn mower 200 is not easily damaged or failed due to contact. At the same time, the locking handle 50 of the lawn mower 200 has high adjustment sensitivity when controlling the extension and retraction of the inner rod 101.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A telescopic structure, characterized in that it comprises: Rod; A housing, which is sleeved on the outside of the rod; A linkage member, which is rotatably mounted inside the housing; A locking handle, one end of which extends into the interior of the housing and is rotatably connected to the housing, and the other end of which extends to the exterior of the housing; A safety switch installed in the housing; The working state of the locking handle includes a first state and a second state. When the locking handle is in the first state, the linkage member is away from the rod, the rod is in a retractable state, and the safety switch is in a disconnected state. When the locking handle is in the second state, the linkage member is close to the rod portion, the rod portion is in a non-retractable state, and the safety switch is in a conducting state.

2. The telescopic structure according to claim 1 is characterized in that the linkage member is rotatably connected to the housing via a first pin shaft, and a torsion spring for controlling the reset of the linkage member is installed on the first pin shaft.

3. The telescopic structure according to claim 2, characterized in that the linkage member comprises a stopper portion, a mounting portion and a buckling portion; in, The stop portion corresponds to the safety switch and is used to control the opening and closing of the safety switch. The buckling portion corresponds to the rod portion and is suitable for buckling on the rod portion. The mounting portion is suitable for mounting a pressing piece.

4. The telescopic structure according to claim 3, characterized in that the rod portion comprises: Inner rod; An outer rod, one end of which is sleeved on the outer side of the inner rod; Wherein, a stop sleeve is installed at the end of the outer rod, and a limit sleeve is sleeved on one end of the inner rod extending into the inner part of the outer rod, and the stop sleeve is snap-fitted and installed inside the shell.

5. The telescopic structure according to claim 4, characterized in that the outer rod and the limiting sleeve are respectively provided with a first hole, and the outer rod, the limiting sleeve and the inner rod are respectively provided with a second hole, wherein: The positions of the first holes on the outer rod and the limiting sleeve correspond to each other, and the positions of the second holes on the outer rod, the limiting sleeve and the inner rod correspond to each other; When the locking handle is in the second state, the linkage member is close to the rod portion, the clamping member on the linkage member passes through the first hole and contacts the outer circumferential surface of the inner rod, and the buckling portion of the linkage member sequentially passes through the outer rod, the limiting sleeve and the second hole on the inner rod and engages with the inner rod.

6. The telescopic structure according to any one of claims 1-5 is characterized in that the locking handle is rotatably connected to the shell through a second pin shaft, the locking handle includes a gripping portion and a mating portion, the mating portion is linked with the linkage member, and the gripping portion extends to the outside of the shell.

7. The telescopic structure according to claim 5 is characterized in that the clamping member is fixedly mounted on the mounting portion of the linkage member, an elastic member is mounted on one side of the clamping member close to the outer circumference of the inner rod, and the elastic member is adapted to the outer circumference of the inner rod.

8. The telescopic structure according to claim 5, characterized in that, when the locking handle is in the first state, the pressing member and the buckling portion are away from the inner rod, the rod is in a telescopic state, and at the same time, the stop portion is away from the safety switch, and the safety switch is in an off state; When the locking handle is in the second state, the pressing member and the buckling portion are close to the inner rod, the rod portion is in a non-retractable state, and at the same time, the abutting portion abuts against the safety switch, and the safety switch is in a conducting state.

9. The telescopic structure according to claim 4 is characterized in that the stop sleeve has a limiting flange, the shell is formed by splicing two shell units, and two limiting baffles are provided on the inner wall of the shell unit, and after the two shell units are spliced ​​together, the limiting baffles are engaged on both sides of the limiting flange.

10. A lawn mower, characterized in that: The invention comprises the telescopic structure according to any one of claims 1 to 9.

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