Support for washing equipment

Abstract

The present invention belongs to the technical field of washing equipment, and specifically relates to a bracket for washing equipment. The present invention aims to solve the problem that existing washing equipment cannot dehydrate some non-clothing items to be washed well. The polygonal bracket of the present invention can press the items to be washed that are easy to hit the wall of the washing drum against the wall of the washing drum, so as to avoid the items to be washed from violently hitting the wall during dehydration, increasing the noise of the washing equipment during dehydration, and reducing the dehydration effect of the items to be washed. And the abutment and cooperation between the bracket and the inner wall of the washing drum can enable the bracket to be stably clamped in the washing drum, ensuring the reliability of the fixation of the items to be washed. In addition, the inner ring position of the polygonal bracket can also accommodate other items to be washed that do not need to be fixed, so that the washing equipment can dehydrate and spin-dry the items to be washed that have fixing requirements and other items to be washed that do not need to be fixed at the same time, while ensuring the dehydration effect of all items to be washed, it also ensures the overall working efficiency of the washing equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of washing equipment, and in particular relates to a bracket used for washing equipment. Background Art

[0002] A washing device generally includes a housing and a washing drum disposed in the housing. When a user uses the washing device to clean items, the items to be washed need to be put into the washing drum and the washing drum is rotated at a set speed so that the washing water in the washing drum tumbles and rotates to wash the clothes to be washed, or after the clothes to be washed are washed, the washing water contained in the clothes to be washed is dried by the centrifugal force generated by the rotation of the washing drum. In this case, when the washing device performs a dehydration program, non-clothing items to be washed, such as shoes, bags, toys, etc., may repeatedly hit the wall of the washing drum, which may not only damage the items to be washed, but also cause the rapidly rotating washing drum to be unbalanced due to the impact, thereby affecting the dehydration effect of the items to be washed.

[0003] At present, in order to solve the above problems, some special washing equipments have appeared on the market, such as shoe washing machines specially used for washing and drying shoes. However, since users may not be allowed to place multiple washing equipments at home, and it is impossible to produce washing equipments with different uses for each item to be washed, using multiple special washing equipments to clean different items cannot well meet the needs of users.

[0004] Accordingly, the art needs a new bracket for washing equipment to solve the above problems. Summary of the invention

[0005] In order to solve the above-mentioned problems in the prior art, that is, to solve the problem that the existing washing equipment cannot dehydrate some non-clothes items to be washed well, the present invention provides a bracket for a washing equipment, characterized in that the washing equipment includes a washing drum, and the bracket is a polygonal structure, which can press the items to be washed against the inner wall of the washing drum and the polygonal structure is in abutment with the inner wall of the washing drum.

[0006] In the preferred technical solution of the above-mentioned bracket for washing equipment, the shape of the polygonal structure is a regular polygon.

[0007] In the preferred technical solution of the above-mentioned bracket for washing equipment, the shape of the polygonal structure is a non-regular polygon.

[0008] In the preferred technical solution of the above-mentioned bracket for washing equipment, the polygonal structure includes a plurality of rods and connecting members, and every two adjacent rods are connected by the connecting member. The rods press the items to be washed against the inner wall of the washing drum, and the connecting member abuts and cooperates with the inner wall of the washing drum.

[0009] In the preferred technical solution of the bracket for washing equipment, the rod is a telescopic rod, and the connecting member is abutted and matched with the inner wall of the washing tub by means of the telescopic rod.

[0010] In the preferred technical solution of the above-mentioned bracket for washing equipment, the telescopic rod includes a first end sleeve rod and a second end sleeve rod, and the ends of the first end sleeve rod and the second end sleeve rod that are away from each other are respectively connected to the adjacent telescopic rod through the connecting member, and the ends of the first end sleeve rod and the second end sleeve rod that are close to each other are sleeved and connected.

[0011] In the preferred technical solution of the above-mentioned bracket for washing equipment, the telescopic rod also includes at least one intermediate sleeve rod arranged between the first end sleeve rod and the second end sleeve rod, and the two ends of the intermediate sleeve rod are respectively sleeved and connected with the first end sleeve rod and the second end sleeve rod.

[0012] In the preferred technical solution of the bracket for washing equipment, a locking member is further provided between the first end sleeve rod and the second end sleeve rod, and the locking member can limit the movement of the first end sleeve rod relative to the second end sleeve rod.

[0013] In the preferred technical solution of the above-mentioned bracket for washing equipment, the locking member is a positioning pin, a first limiting hole is provided on the first end sleeve rod, and a second limiting hole is provided on the second end sleeve rod, and the positioning pin is sequentially inserted into the first limiting hole and the second limiting hole to limit the movement of the first end sleeve rod relative to the second end sleeve rod.

[0014] In the preferred technical solution of the above-mentioned bracket for washing equipment, the locking member is a locking screw, and a screw hole is provided on one of the first end sleeve rod and the second end sleeve rod closer to the outside, and the locking screw is screwed into the screw hole to abut against one of the first end sleeve rod and the second end sleeve rod closer to the inside, so as to limit the movement of the first end sleeve rod relative to the second end sleeve rod.

[0015] It is understood by those skilled in the art that the bracket of the present invention is a polygonal structure, which can press the items to be washed that are easy to hit the wall of the washing drum against the wall of the washing drum, so as to fix the items to be washed in the washing drum, so as to avoid the items to be washed from violently hitting the wall of the washing drum during dehydration, increase the noise of the washing equipment during dehydration, and reduce the dehydration effect of the items to be washed. And the polygonal structure is in abutment with the inner wall of the washing drum, so that the polygonal structure can be stably clamped in the washing drum, ensuring the reliability of the fixation of the items to be washed. In addition, the inner ring space of the polygonal structure can also accommodate other items to be washed that do not need to be fixed, so that the washing equipment can dehydrate and dry the items to be washed that have fixation requirements and the items to be washed that do not need to be fixed at the same time, while ensuring the dehydration effect of all items to be washed, it also ensures the overall working efficiency of the washing equipment.

[0016] As a preferred embodiment, the polygonal structure is in the shape of a regular polygon, so that the regular polygonal structure and the wall of the washing drum can accommodate multiple items to be washed with a smaller volume difference, so that the bracket can meet the user's needs of simultaneously fixing multiple items to be washed with basically the same volume.

[0017] As another preferred embodiment, the polygonal structure is in the shape of a non-regular polygon, so that the non-regular polygonal structure and the wall of the washing drum can accommodate multiple items to be washed with large volume differences, so that the bracket can meet the user's needs of fixing multiple items to be washed with different volumes at the same time.

[0018] Furthermore, the polygonal structure includes a plurality of telescopic rods and connecting components, and every two adjacent telescopic rods are connected by a connecting component. The items to be washed are pressed between the telescopic rods and the inner wall of the washing drum, and the connecting structure abuts and cooperates with the inner drum of the washing drum with the help of the telescopic effect of the telescopic rods, so that the polygonal structure can adapt to the fixing needs of various items to be washed, and can simultaneously fix multiple items to be washed with a large difference in volume, and can simultaneously fix multiple items to be washed with a small difference in volume, which makes it more convenient for users to dehydrate multiple different items to be washed at the same time, thereby improving the user experience.

[0019] Furthermore, a locking member is also provided on the telescopic rod, so that the telescopic rod can maintain its adjusted telescopic state through the locking member after the length adjustment is completed, so as to ensure that the connecting member at the end of the telescopic rod can reliably abut against the wall of the washing drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The preferred embodiment of the present invention is described below with reference to the accompanying drawings and in combination with the case where the washing device is a drum washing machine. The accompanying drawings are:

[0021] Figure 1 is a schematic diagram of the working state of the bracket of the present invention in the drum of a drum washing machine;

[0022] Figure 2 is a schematic structural diagram of a first embodiment of a bracket of the present invention, wherein a first locking member is shown;

[0023] Figure 3 1 is a schematic structural diagram of a second embodiment of the bracket of the present invention, wherein a second locking member is shown.

[0024] In the accompanying drawings: 1. drum; 2. bracket; 21. telescopic rod; 211. first end sleeve rod; 2111. first limiting hole; 212. second end sleeve rod; 2121. second limiting hole; 22. connecting member; 23. locking member; 231. positioning pin; 232. locking screw; 3. items to be washed. DETAILED DESCRIPTION

[0025] It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific applications. For example, although the bracket of the present invention is described in conjunction with a drum washing machine, it is obvious that the washing device is not limited to a drum washing machine. The bracket of the present invention can also be applied to other washing devices with the same fixing requirements for the items to be washed, such as a drum-type washer-dryer, etc.

[0026] It should be noted that in the description of the present invention, the terms "inside" and "outside" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element 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" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Generally, a drum washing machine includes a housing and a drum assembly disposed in the housing. Specifically, the drum assembly includes an outer drum and a drum 1 (i.e., a washing drum in the claims) rotatably disposed in the outer drum. Articles to be washed 3 (such as shoes, cloth toys, cloth bags, hats, etc.) are accommodated in the drum 1 and are dehydrated and dried by the centrifugal force generated by the high-speed rotation of the drum 1. The bracket of the present invention is described below in conjunction with the above situation.

[0029] See first Figure 1 , Figure 1 FIG. 2 is a schematic diagram of the working state of the support of the present invention in the drum of a drum washing machine. Figure 1 As shown, the support 2 for the drum washing machine of the present invention is a polygonal structure. The polygonal structure includes a plurality of rods, and the two ends of each rod are connected to each other to form a frame-like polygonal structure. The articles 3 to be washed are pressed by the support 2 between the rods and the inner wall of the drum 1, so as to fix the articles 3 to be washed in the drum 1 and prevent the articles 3 to be washed from bumping and moving in the drum 1.

[0030] In a possible scenario, when the items to be washed 3 are pressed and fixed, the bracket 2 is clamped in the drum 1 in a manner of only indirectly abutting against the inner wall of the drum 1. For example, when the items to be washed 3 are large in size and their number is the same as the number of rods of the polygonal structure, multiple items to be washed 3 correspond to one rod respectively and are distributed along the inner wall of the drum 1, and each rod of the bracket 2 abuts against the items to be washed 3 so that the items to be washed 3 are close to the inner wall of the drum 1. At this time, the bracket 2 is clamped on the side of each item to be washed 3 close to the center of the drum 1, and there is no contact position between the bracket 2 and the drum 1. Alternatively, multiple items to be washed 3 are pressed against the inner wall of the drum 1 by the corners of the above-mentioned polygonal structure, and the number of items to be washed 3 is the same as the number of corners of the polygonal structure.

[0031] In a possible scenario, when the items 3 to be washed are tightly fixed, the bracket 2 also directly abuts against the inner wall of the drum 1 to be clamped in the drum 1. For example, the number of items 3 to be washed is less than the number of rods of the polygonal structure, and the items 3 to be washed are abutted against the items 3 to be washed by the rods or corners of the polygonal structure. At this time, the rods of the polygonal structure that are not abutted against the items 3 to be washed abut against the inner wall of the drum 1, and the bracket 2 is clamped in the drum 1 by means of the above-mentioned indirect abutment and direct abutment. Or preferably, the items 3 to be washed are pressed between the rod body of the rod and the wall of the drum 1 by the rods of the bracket 2, so as to fix the items 3 to be washed in the drum 1, and prevent the items 3 to be washed from hitting the inner wall of the drum 1 during the dehydration process, thereby affecting the dehydration effect. At the same time, the rod of the bracket 2 is directly in contact with the inner wall of the drum 1, and the contact position between the bracket 2 and the drum 1 reaches the maximum, so that the bracket 2 is stably clamped on the inner wall of the drum 1, so that the items to be washed 3 can be reliably fixed to the drum 1 with the help of the bracket 2 clamped in the drum 1, thereby improving the reliability of fixing the items to be washed. The preferred technical solution of the present invention is further described below in combination with the above preferred scenarios.

[0032] As a possible implementation, the bracket 2 is a bracket of a regular polygonal structure, such as a regular triangle bracket, a square bracket, a regular pentagon bracket, etc., and the lengths of the plurality of rods are the same. When the regular polygonal bracket 2 is inserted into the drum 1, the bracket 2 can allow a plurality of to-be-washed articles 3 of similar volume to be inserted between the rod and the inner wall of the drum 1, and the corners of the bracket 2 are (directly) in contact with the inner wall of the drum 1.

[0033] As another possible implementation, the bracket 2 is a bracket of a non-regular polygonal structure, such as an oblique triangle bracket, a rectangular bracket, a non-pentagonal bracket, etc., and at least a portion of the multiple rods of the bracket 2 have different lengths. When the above-mentioned non-regular polygonal bracket 2 is inserted into the drum 1, the bracket 2 can allow multiple items 3 to be washed of different volumes to be inserted between its rods and the inner wall of the drum 1, and each corner of the bracket 2 is (directly) in contact with the inner wall of the drum 1.

[0034] Further, as a possible embodiment, the length of the rod of the bracket 2 is not adjustable, and the bracket 2 can be directly clamped in the drum 1. Specifically, in addition to the multiple rods, the bracket 2 also includes a connecting member 22, and each adjacent two rods are connected by the connecting member 22, and the rod presses the items to be washed 3 against the inner wall of the drum 1, and the connecting member 22 abuts against the inner wall of the drum 1. As an example, the above-mentioned rod is composed of a metal rod or a plastic rod with a certain elasticity, and the connecting member 22 connects the ends of the two adjacent rods by fixed connection or integral molding. The user can put the bracket 2 into the drum 1 by squeezing the bracket 2 and slightly deforming the rod of the bracket 2, and clamp the items to be washed 3 between the rod and the drum wall of the drum 1 by pulling the rod of the bracket 2, so that the rod of the bracket 2 can fix the items to be washed 3 by restoring the elastic deformation and keep the abutment state of the connecting member 22 and the inner wall of the drum 1. The drum washing machine may be equipped with a plurality of regular polygonal brackets and irregular polygonal brackets, so that the user can select a suitable bracket 2 according to the actual fixing requirements of the items to be washed 3 during each dehydration.

[0035] As an alternative preferred embodiment, the length of the rods is adjustable so that the bracket 2 can be adjusted by adjusting the length of each rod. Specifically, the rod is a telescopic rod 21, and the connecting member 22 is in abutment with the inner wall of the drum 1 by means of the telescopic rod 21. That is to say, when the telescopic rod 21 can be extended and shortened, the accommodating space between the telescopic rod 21 and the inner wall of the drum 1 can be enlarged or reduced according to the actual size of the items to be washed 3, so that the bracket 2 can simultaneously meet the fixing requirements of multiple items to be washed 3. And while pressing against the items to be washed 3, the adjusted telescopic rod 21 can also make the connecting members 22 at both ends contact the inner wall of the drum 1 respectively, so that each connecting member 22 can be closely abutted against the inner wall of the drum 1 under the support of the two telescopic rods 21 connected thereto.

[0036] See next Figure 2 and Figure 3 , Figure 2 is a schematic structural diagram of a first embodiment of the bracket of the present invention, wherein a first locking member is shown. Figure 3 FIG. 2 is a schematic structural diagram of a second embodiment of the bracket of the present invention, wherein a second locking member is shown. Figure 2 and Figure 3As shown, the telescopic rod 21 includes a first end sleeve rod 211 and a second end sleeve rod 212. The ends of the first end sleeve rod 211 and the second end sleeve rod 212 that are away from each other are respectively connected to the end sleeve rods of other adjacent telescopic rods 21 through two connecting members 22. The ends of the first end sleeve rod 211 and the second end sleeve rod 212 that are close to each other are sleeved and connected, so that the multiple telescopic rods 21 of the bracket 2 are connected into a polygonal structure with variable side lengths through the connecting members 22.

[0037] Of course, although the telescopic rod 21 shown in the figure includes two sleeve rods, this is not a limitation, and the telescopic rod 21 can obviously also include more than two sleeve rods. Specifically, the telescopic rod 21 also includes at least one intermediate sleeve rod (not shown in the figure) arranged between the first end sleeve rod 211 and the second end sleeve rod 212, and the two ends of the intermediate sleeve rod are respectively sleeved and connected with the first end sleeve rod 211 and the second end sleeve rod 212, that is, when the number of the intermediate sleeve rod is one, the two ends of the intermediate sleeve rod are respectively sleeved and connected with the first end sleeve rod 211 and the second end sleeve rod 212; when the number of the intermediate sleeve rods is multiple, after the multiple intermediate sleeve rods are sleeved and connected in sequence, the outer ends of the two intermediate sleeve rods at the head and tail ends are respectively sleeved and connected with the first end sleeve rod 211 and the second end sleeve rod 212.

[0038] In addition, a locking member 23 is provided between the first end sleeve rod 211 and the second end sleeve rod 212. The locking member 23 can limit the movement of the first end sleeve rod 211 relative to the second end sleeve rod 212 so that the telescopic rod 21 can maintain its telescopic state after its length is adjusted.

[0039] like Figure 2 As shown, as a first embodiment of the bracket 2 of the present invention, the locking member 23 is a positioning pin 231, a first limiting hole 2111 is provided on the first end sleeve rod 211, and a second limiting hole 2121 is provided on the second end sleeve rod 212. The positioning pin 231 is sequentially inserted into the first limiting hole 2111 and the second limiting hole 2121 to limit the movement of the first end sleeve rod 211 relative to the second end sleeve rod 212. As an example, the first end sleeve rod 211 is sleeved to the outside of the second end sleeve rod 212. When positioning and locking, the positioning pin 231 is first inserted into the first limiting hole 2111 and then into the second limiting hole 2121 to limit the relative movement of the two sleeve rods. More specifically, a plurality of second limiting holes 2121 are provided on the second end sleeve rod 212 located on the inner side, and the plurality of second limiting holes 2121 are sequentially arranged. When the first end sleeve rod 211 slides relative to the second end sleeve rod 212 , the first limiting hole 2111 and one of the second limiting holes 2121 are aligned with each other so that the positioning pin 231 can be inserted into the first limiting hole 2111 and the second limiting hole 2121 at the same time.

[0040] like Figure 3As shown, as a second embodiment of the bracket 2 of the present invention, the locking member 23 can also be a locking screw 232, and a screw hole (not shown in the figure) is provided on the first end sleeve rod located on the outside, and the locking screw 232 is screwed into the screw hole to abut against the second end sleeve rod 212 which is sleeved on the inside, so as to limit the movement of the first end sleeve rod 211 relative to the second end sleeve rod 212.

[0041] It should be noted by those skilled in the art that, firstly, even though the brackets 2 shown in the figures are all triangular structures, in fact the number of telescopic rods 21 of the bracket 2 is not limited, and the actual number of telescopic rods 21 of the bracket 2 can be specifically set according to the actual usage requirements of the user.

[0042] Secondly, the cross-sectional shape of the telescopic rod 21 is not limited to the circular shape shown in the figure. The cross-sectional shape of each set of rods of the telescopic rod 21 can also be other shapes such as rectangle and ellipse, as long as the set cross-sectional shape does not affect the telescopic function of the telescopic rod 21.

[0043] Furthermore, in addition to the positioning pin 231 and the locking screw 232, the telescopic rod 21 can also maintain its adjusted length through locking components such as elastic buckles, as long as the set locking components can meet the locking requirements of the telescopic rod 21 and do not affect the relative sliding between the various sets of rods of the telescopic rod 21.

[0044] Finally, the shape of the connecting member 22 is not limited to the cylindrical shape shown in the figure. For example, the connecting member 22 can also be a V-shaped sleeve rod that can be sleeved and connected with the ends of the two telescopic rods 21, or the connecting member 22 can also be a prismatic block structure that is integrally formed with the ends of the two telescopic rods 21. In other words, as long as the structure of the connecting member 22 can achieve the function of connecting adjacent rods. Of course, considering the connection strength and anti-slip requirements, the connecting member 22 can also be a connecting member with an anti-slip material coated on the outside, and the specific structure of the connecting member 22 can be set according to the actual working environment.

[0045] In addition, without considering the flexibility of adjustment, the telescopic rod 21 can also be adjusted in length by other methods besides the sleeve connection. For example, the telescopic rod 21 can also include multiple flat rod segments and the ends of the multiple flat rod segments are pivotally connected in sequence, so that the telescopic rod 21 can be extended and shortened by folding some of the rod segments and unfolding some of the rod segments. In other words, the specific structure of the telescopic rod 21 is not limited to the multiple-segment sleeve, as long as the specific structure of the telescopic rod 21 can meet the telescopic requirements. The above changes in shape and structure do not exceed the principle and protection scope of the present invention.

[0046] In summary, the bracket 2 of the present invention includes a telescopic rod 21 and a connecting member 22. A plurality of telescopic rods 21 are connected by the connecting member 22 to form a polygonal structure. The telescopic rod 21 of the polygonal structure can press the laundry items 3 of different volumes against the inner wall of the drum 1. At the same time, the connecting member 22 of the polygonal structure can abut and cooperate with the inner wall of the drum 1 under the action of the telescopic rod 21 to strengthen the clamping strength of the bracket 2 and improve the fixing reliability of the laundry items 3, thereby preventing the laundry items 3 from colliding with the drum 1 during dehydration and drying, ensuring the dehydration effect of the laundry items 3, and improving the adaptability of the drum washing machine to a variety of laundry items 3 to be dehydrated.

[0047] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A support for washing equipment, It is characterized in that The washing device comprises a washing drum, the bracket is a polygonal structure, the polygonal structure can press the articles to be washed against the inner wall of the washing drum and the polygonal structure is in abutment with the inner wall of the washing drum. The polygonal structure includes a plurality of rods and connecting members, and every two adjacent rods are connected by the connecting member. The rods press the articles to be washed against the inner wall of the washing tub, and the connecting member abuts and cooperates with the inner wall of the washing tub.

2. The support for washing equipment according to claim 1, It is characterized in that The shape of the polygonal structure is a regular polygon.

3. The support for washing equipment according to claim 1, It is characterized in that The shape of the polygonal structure is a non-regular polygon.

4. The support for washing equipment according to claim 1, It is characterized in that The rod is a telescopic rod, and the connecting component is abutted and matched with the inner wall of the washing tub by means of the telescopic rod.

5. The support for washing equipment according to claim 4, It is characterized in that The telescopic rod includes a first end sleeve rod and a second end sleeve rod, the ends of the first end sleeve rod and the second end sleeve rod that are far away from each other are respectively connected to the adjacent telescopic rod through the connecting member, and the ends of the first end sleeve rod and the second end sleeve rod that are close to each other are sleeve-connected.

6. The support for washing equipment according to claim 5, It is characterized in that The telescopic rod further comprises at least one intermediate sleeve rod arranged between the first end sleeve rod and the second end sleeve rod, and two ends of the intermediate sleeve rod are respectively sleeve-connected with the first end sleeve rod and the second end sleeve rod.

7. The support for washing equipment according to claim 5, It is characterized in that A locking member is further provided between the first end sleeve rod and the second end sleeve rod, and the locking member can limit the movement of the first end sleeve rod relative to the second end sleeve rod.

8. The support for washing equipment according to claim 7, It is characterized in that The locking member is a positioning pin, the first end sleeve rod is provided with a first limiting hole, and the second end sleeve rod is provided with a second limiting hole. The positioning pin is inserted into the first limiting hole and the second limiting hole in sequence to limit the movement of the first end sleeve rod relative to the second end sleeve rod.

9. The support for washing equipment according to claim 7, It is characterized in that The locking member is a locking screw, and a screw hole is provided on one of the first end sleeve rod and the second end sleeve rod that is close to the outer side. The locking screw is screwed into the screw hole to abut against one of the first end sleeve rod and the second end sleeve rod that is close to the inner side, so as to limit the movement of the first end sleeve rod relative to the second end sleeve rod.

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