Aluminum profile oxidation equipment

Abstract

The utility model relates to the technical field of aluminum profile oxidation treatment equipment, in particular to aluminum profile oxidation equipment which comprises an oxidation pond, a hanging tool assembly and a conveying assembly used for driving the hanging tool assembly to move, and the hanging tool assembly comprises a hanging tool transverse rod arranged horizontally and two vertical rods installed on the hanging tool transverse rod. A supporting rod assembly used for supporting an aluminum profile is further arranged between the two vertical rods, the supporting rod assembly and the vertical rods are connected through locking mechanisms, the upper ends of the vertical rods are provided with bent ends, and the vertical rods are hung on the hanging tool transverse rod through the bent ends. The supporting rod assembly is additionally arranged between the hanging tool assembly and the aluminum profile, the supporting rod assembly is inserted into the aluminum profile to support the aluminum profile, the supporting rod assembly is connected with the vertical rod in the hanging tool assembly through the locking mechanism, fixing of a supporting rod is achieved, and the problem that the periphery of the end of the aluminum profile cannot be oxidized is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aluminium profile oxidation treatment equipment, specifically is a kind of aluminium profile oxidation equipment. BACKGROUND

[0002] Aluminium profile is widely used in industrial field and is the basic material of military industry and civilian industry.But aluminium profile is easily corroded when being exposed in air for a long time, and the corrosion resistance and wear resistance of aluminium profile can be significantly improved by forming dense oxide film on the surface of aluminium profile through oxidation treatment.

[0003] At present, when aluminium profile is oxidized, it is mainly sent into oxidation tank for oxidation treatment by lifting appliance, but currently aluminium profile is generally bound on lifting appliance by iron wire or directly clamped on lifting appliance by fixing frame, so that although aluminium profile can be stably fixed on lifting appliance, the end peripheral portion of aluminium profile cannot form oxide film due to the shielding of iron wire fixing clamp, so that the needs of some customers cannot be met, and part of material is wasted, resulting in the increase of production cost. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a kind of aluminium profile oxidation equipment to solve the problem that the connecting mode of hanger and aluminium profile in current oxidation equipment can not complete oxidation of the end of aluminium profile.

[0005] The technical scheme adopted by the utility model is: a kind of aluminium profile oxidation equipment, including oxidation tank, hanger assembly and the conveying assembly for driving the movement of the hanger assembly, the hanger assembly includes horizontally arranged hanger cross bar and two vertical rods installed on the hanger cross bar, and support rod assembly for supporting aluminium profile is further arranged between two vertical rods, and the support rod assembly is connected with the vertical rod through locking mechanism, the upper end of the vertical rod is provided with bent end, and the vertical rod is hung on the hanger cross bar through the bent end.

[0006] After adopting the above structure, the following beneficial effects are obtained:

[0007] 1. support rod assembly is added between hanger assembly and aluminium profile, and the inside of aluminium profile is inserted and supported by support rod assembly, and the support rod assembly is connected with the vertical rod in hanger assembly through locking mechanism, so that the fixation of support rod is realized, and the problem that the outer periphery of the end of aluminium profile cannot be oxidized is effectively avoided.

[0008] 2. the interval between two vertical rods in hanger assembly can be conveniently adjusted by hanging the vertical rod on the hanger cross bar through bent end, so that when aluminium profile of different sizes is oxidized, good and stable supporting effect can be achieved by adjusting the interval between vertical rods.

[0009] Preferably, the support rod assembly penetrates the aluminum profile, and the locking mechanism is a fixed clamp.

[0010] The support rod assembly penetrates the entire aluminum profile, and is fixed on the vertical rod by the fixed frame, thereby providing more stable support to the aluminum profile and ensuring that the aluminum profile will not easily fall off the hanger assembly.

[0011] Preferably, the locking mechanism comprises a circular through hole formed in the vertical rod, and the support rod assembly comprises a support rod body and a connecting rod mounted at both ends of the support rod body, and the connecting rod is inserted into the circular through hole.

[0012] In this way, the support rod assembly can be connected to the hanger assembly by inserting the connecting rod into the circular through hole.

[0013] Preferably, a first recess is formed in the connecting rod, a first limiting buckle is rotatably connected in the first recess, and a first elastic member is mounted between the first limiting buckle and the connecting rod.

[0014] The first limiting buckle can automatically pop out after the connecting rod is inserted into the circular through hole, and can limit the position between the connecting rod and the vertical rod, thereby facilitating the installation of the support rod assembly and the hanger assembly, limiting the position of the vertical rod, avoiding the separation of the hanger assembly and the support rod assembly due to the movement of the vertical rod during use, and facilitating the unlocking of the first limiting buckle by the elastic member.

[0015] Preferably, the support rod body is a hollow pipe, and a plurality of second recesses are formed in the top surface of the support rod, and a support wheel is rotatably connected in each second recess, and the support rod abuts against the inner side wall of the aluminum profile by the support wheel.

[0016] In this way, the support effect of the support rod assembly on the aluminum profile can be ensured, and the contact points between the support rod assembly and the aluminum profile can be reduced, thereby reducing the blind area of the oxidation process and improving the oxidation effect of the aluminum profile. In addition, the support wheel reduces the friction between the aluminum profile and the support rod assembly, thereby avoiding the wear of the aluminum profile and the support rod assembly, and making the aluminum profile more smoothly set on the support rod assembly.

[0017] Preferably, the locking mechanism comprises a circular through hole formed in the vertical rod, and two support rod assemblies are provided, and the two support rod assemblies are respectively inserted into the circular through holes of the vertical rods on both sides, and first limiting bosses are respectively arranged at both ends of the support rod assemblies.

[0018] Two support rod assemblies can support the two ends of the aluminum profile respectively, not only can stably support the aluminum profile, but also reduce the contact area between the aluminum profile, thereby reducing the blind area in the oxidation process, improving the oxidation effect, and the support rod assembly can slide in the circular through hole, so that the support rod assembly can be pulled away from the hanger assembly outside during normal times, the aluminum profile is prevented from being prevented on the side of the support rod assembly, and then the support rod assembly is pushed in, so that the support rod assembly abuts against the inner wall of the aluminum profile, so that the installation process is more easy and fast, the first limiting boss can limit the support rod assembly, and prevent the support rod assembly from falling out of the circular through hole.

[0019] As preferred, the support rod assembly is further fixedly connected with a second limiting buckle, and the side of the circular through hole is further provided with a third groove for the second limiting buckle to pass through.

[0020] When the support rod assembly extends into the circular through hole, the support rod assembly can be rotated, so that the side of the second limiting buckle abuts against the side of the vertical rod, thereby supporting the support rod assembly and ensuring that the support rod assembly remains horizontally arranged, thereby stably supporting the aluminum profile.

[0021] As preferred, the upper and lower ends of the vertical rod are further respectively provided with a second limiting boss, and at least two limiting plates are arranged between the two vertical rods, and the two ends of the limiting plate are provided with a plurality of limiting grooves for clamping on the second limiting boss.

[0022] The limiting plate clamped between the two second limiting bosses can limit the position between the two vertical rods, thereby preventing the distance between the two vertical rods from changing during the oxidation of the aluminum profile, and ensuring that the aluminum profile can be stably oxidized. The plurality of limiting grooves on the limiting plate can also be selected according to the length of the aluminum profile to connect with the second limiting boss, so that it can be applied to the oxidation work of aluminum profiles of different lengths.

[0023] As preferred, the support rod assembly comprises a fixed shell, a sliding groove is formed in the fixed shell, a sliding block is slidably connected in the sliding groove, one end of the sliding block is connected with a movable rod, the movable rod extends to the outside of the fixed shell, a first support plate is rotatably connected to one end of the fixed shell, a second support plate is rotatably connected to the sliding block, and the first support plate and the second support plate are rotatably connected.

[0024] The sliding block moves in the sliding groove, thereby driving the first support plate and the second support plate to move, so that the connection between the first support plate and the second support plate can be supported on the inner wall of the aluminum profile. Such a design can not only ensure stable support of the aluminum profile during oxidation of the aluminum profile with high height, but also ensure that the support rod assembly can be stably connected with the aluminum profile, thereby ensuring stable and effective oxidation effect.

[0025] As preferred, a second elastic member is further arranged between the sliding block and the movable rod, a third limiting boss for abutting with the second elastic member is arranged on the movable rod, a limiting hole is arranged on the sliding block, one end of the movable rod inside the fixed shell penetrates through the limiting hole, and a fourth limiting boss is further connected to the one end of the movable rod inside the fixed shell, and a telescopic locking structure for locking the position of the movable rod is further arranged between the movable rod and the fixed shell.

[0026] The arrangement of the second elastic member makes the first support plate and the second support plate not continue to move with the movable rod when the first support plate and the second support plate have abutted with the inner side wall of the aluminum profile, thereby avoiding the problem that the first support plate and the second support plate cause damage to the inner wall of the aluminum profile; the telescopic locking structure adopts the pressing telescopic locking structure of a ball pen, can quickly push out and lock the first support plate and the second support plate, and can also be quickly and conveniently unlocked, so that the aluminum profile can be conveniently taken out. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the hanging assembly in the aluminum profile oxidation equipment in embodiment 1.

[0028] Figure 2 is a schematic diagram of the hanging assembly in the aluminum profile oxidation equipment in embodiment 2. Figure 1 is a schematic diagram of the local enlarged structure in region A.

[0029] Figure 3 is a schematic diagram of the hanging assembly in the aluminum profile oxidation equipment in embodiment 2.

[0030] Figure 4 is a schematic diagram of the hanging assembly in the aluminum profile oxidation equipment in embodiment 2.

[0031] Figure 5 is a schematic diagram of the hanging assembly in the aluminum profile oxidation equipment in embodiment 2.

[0032] Figure 6 is a schematic diagram of the hanging assembly in the aluminum profile oxidation equipment in embodiment 3. Figure 5 is a schematic diagram of the local enlarged structure in region B.

[0033] Figure 7 is a schematic diagram of the hanging assembly in the aluminum profile oxidation equipment in embodiment 3.

[0034] Figure 8 is a schematic diagram of the hanging assembly in the aluminum profile oxidation equipment in embodiment 3.

[0035] Figure 9 is Figure 8 is a partial enlarged structural schematic view of the "C" area in the figure.

[0036] Figure 10 is a perspective structural schematic view of the support rod assembly in the aluminum profile oxidation equipment in embodiment 4.

[0037] Figure 11 is a front view structural schematic view of the support rod assembly in the aluminum profile oxidation equipment in embodiment 4.

[0038] Among them, the hanger assembly 10, the hanger cross rod 11, the vertical rod 12, the bent end 121, the circular through hole 122, the third groove 123, the second limiting boss 13, the support rod assembly 20, the support rod body 21, the second groove 211, the connecting rod 22, the first groove 221, the first limiting buckle 222, the support wheel 23, the first limiting boss 24, the second limiting buckle 25, the fixed shell 26, the sliding groove 261, the sliding block 27, the movable rod 28, the third limiting boss 281, the fourth limiting boss 282, the second elastic element 29, the fixed clamp 30, the limiting plate 40, the limiting groove 41, the first supporting plate 51, the second supporting plate 52, the telescopic locking structure 60, the aluminum profile 70. DETAILED DESCRIPTION

[0039] The utility model will be further described below in combination with the drawings and specific embodiments.

[0040] Embodiment 1

[0041] According to the drawings shown in the description Figure 1 The utility model provides a kind of aluminum profile oxidation equipment, including oxidation pool, hanger assembly 10 and the conveying assembly for driving hanger assembly 10 to move, wherein hanger assembly includes horizontally arranged hanger cross rod 11 and two vertical rods 12 hung on hanger cross rod 11, the upper end of vertical rod 12 is bent end 121 of inverted "U" character, can be stably hung on hanger cross rod 11, support rod assembly 20 for supporting aluminum profile 70 is also installed between two vertical rods 12, in the embodiment, support rod assembly 20 is long rod through aluminum profile 70, support rod assembly 20 can be made of aluminum profile 70 waste material, both meet the use requirement, also realize waste utilization.

[0042] The both ends of support rod assembly 20 are connected on vertical rod 12 by locking mechanism, in the embodiment, locking mechanism is fixed clamp 30, and both ends of fixed clamp 30 respectively clamp one support rod assembly 20 on vertical rod 12, to realize the fixation of two groups of support rod assembly 20 and aluminum profile 70 simultaneously.

[0043] The working principle is that when the aluminum profile 70 is oxidized, the support rod assembly 20 is first inserted into the inside of the aluminum profile 70, and the support rod and the aluminum profile 70 are fixedly installed on the vertical rod 12 of the hanger assembly 10 through the fixing clamp 30. The hanger and the aluminum profile 70 connected thereto can be sent into the oxidation tank through the conveying assembly for oxidation work. In this way, the aluminum profile 70 can be effectively oxidized, and the outer surface and the end of the aluminum profile 70 are not wound or blocked, so that the outer surface and the end of the aluminum profile 70 can be effectively oxidized, thereby improving the oxidation effect of the aluminum profile 70.

[0044] Embodiment 2

[0045] According to the description Figures 2-3 The difference between the present embodiment and embodiment 1 is that the locking mechanism comprises a plurality of circular through holes 122 formed in the vertical rod 12, which are arranged uniformly from top to bottom, and the support rod assembly 20 comprises a support rod body 21 and a connecting rod 22 installed at both ends of the support rod body 21, and the connecting rod 22 is inserted into the circular through hole 122 of the vertical rod 12 on both sides of the support rod assembly 20.

[0046] In the present embodiment, a first recess 221 is further formed in the connecting rod 22, and a first limiting buckle 222 is rotatably connected in the first recess 221, and a first elastic member is further arranged between the first limiting buckle 222 and the first recess 221. The first elastic member is a torsion spring, so that the first limiting buckle 222 has a tendency to move towards the outside of the first recess 221. A boss is further arranged on the outer side of the first recess 221 for limiting the first limiting buckle 222, to prevent the first limiting buckle 222 from turning to the outside of the first recess 221. In the present embodiment, the top surface of the first limiting buckle 222 is inclined, and the end away from the support rod body 21 is located inside the first recess 221, and the end close to the support rod body 21 extends to the outside of the first recess 221, so that the connecting rod 22 can be directly inserted into the circular through hole 122, and the first limiting buckle 222 automatically pops up when it moves to the outside of the vertical rod 12, realizing the limiting function.

[0047] In the present embodiment, the support rod body 21 is a hollow pipe, and five second recesses 211 are formed in the top surface of the support rod body 21, and support wheels 23 are rotatably connected in the second recesses 211. The top surface of the support wheel 23 extends to the outside of the support rod body 21, and the support rod assembly 20 is connected with the aluminum profile 70 through the support wheel 23.

[0048] The working principle is that when the aluminum profile 70 is oxidized, the support rod assembly 20 is inserted and penetrates the inside of the aluminum profile 70, and the support wheel 23 is abutted with the top surface of the inside of the aluminum profile 70, then the connecting rod 22 at one end of the support rod assembly 20 is inserted into the circular through hole 122 on one of the vertical rods 12, when the first limiting boss 24 moves to the outside of the vertical rod 12, it is automatically popped up under the action of the first elastic member, and the side surface is abutted on the side surface of the vertical rod 12, so that the vertical rod 12 is limited, then the connecting rod 22 at the other end of the support rod assembly 20 is inserted into the circular through hole 122 on the other vertical rod 12 to realize the connection between the support rod assembly 20 and the two vertical rods 12, then the lifting appliance and the aluminum profile 70 connected therewith can be sent into the oxidation tank through the conveying assembly for oxidation work.

[0049] Embodiment 3

[0050] According to the description accompanying Figures 4-7 The difference between the present embodiment and embodiment 1 is that the locking mechanism includes a circular through hole 122 opened on the vertical rod 12, the support rod assembly 20 is provided with two and is installed on the vertical rods 12 on both sides, the support rod assembly 20 is inserted in the circular through hole 122, and the first limiting boss 24 for limiting the support rod assembly 20 is arranged at both ends of the support rod assembly 20, which effectively avoids the support rod assembly 20 from falling out of the circular through hole 122 during use.

[0051] In the present embodiment, the second limiting buckle 25 is also welded on the support rod assembly 20, the distance between the side surface of the second limiting buckle 25 and the first limiting boss 24 of the support rod assembly 20 located outside the vertical rod 12 is the same as the thickness of the vertical rod 12, and a third groove 123 is opened on the side of the circular through hole 122 for the second limiting buckle 25 to pass through, when the second limiting buckle 25 enters between the two vertical rods 12, rotating the support rod assembly 20 can make the side surface of the second limiting buckle 25 abut on the side surface of the vertical rod 12, so as to ensure that the support rod assembly 20 remains perpendicular to the vertical rod 12 during use, and further ensures that the aluminum profile 70 can be stably supported, in the present embodiment, in order to facilitate the rotation of the support rod assembly 20, a handle is further arranged at the outer end of the support rod assembly 20.

[0052] In the embodiment, the side surface of the vertical rod 12 at the upper and lower ends is also respectively provided with a second limiting boss 13, and two horizontally arranged limiting plates 40 are installed between the two vertical rods 12, and a plurality of limiting grooves 41 for clamping the second limiting boss 13 are formed on the limiting plate 40. By installing the limiting plate 40 at the upper and lower ends of the vertical rod 12, the relative position of the two vertical rods 12 can be fixed, avoiding the change of the distance between the vertical rods 12 during the oxidation process, so as to ensure that the support rod assembly 20 can stably support the aluminum profile 70 and prevent the aluminum profile 70 from falling.

[0053] The working principle is that the support rod assembly 20 is first placed at both ends, then the aluminum profile 70 is placed between the vertical rods 12 and the support rod assembly 20 at a horizontal position, and then the support rod assemblies 20 on both sides are pushed in, so that the end of the support rod assembly 20 enters the inside of the aluminum profile 70 and supports the aluminum profile 70. Then rotate the support rod assembly 20 so that the second limiting buckle 25 abuts against the side wall of the vertical rod 12, to ensure the supporting effect of the aluminum profile 70. Then the lifting appliance and the aluminum profile 70 connected thereto can be sent into the oxidation tank by the conveying assembly for oxidation work.

[0054] Embodiment 4

[0055] According to the description Figures 8-11 The difference between the embodiment and the embodiment 3 is that the support rod assembly 20 includes a fixed shell 26 and a sliding block 27, wherein the fixed shell 26 is provided with a sliding groove 261, and the sliding block 27 is slidingly connected in the sliding groove 261, and the sliding block 27 is further connected with a movable rod 28, the movable rod 28 extends to the outside of the fixed shell 26, and the sliding block 27 is driven to move by the movable rod 28. A first support plate 51 is rotatably connected at the right end of the fixed shell 26, and a second support plate 52 is rotatably connected on the sliding block 27, and the ends of the first support plate 51 and the second support plate 52 are rotatably connected. When the sliding block 27 moves, the first support plate 51 and the second support plate 52 can be driven to move together, so that the connecting end of the first support plate 51 and the second support plate 52 extends, so as to support the aluminum profile 70. In the embodiment, the first support plate 51 and the second support plate 52 are symmetrically arranged along the center line of the fixed shell 26, and are respectively used to support the upper and lower sides of the inner wall of the aluminum profile 70.

[0056] In the embodiment, the second elastic member 29 is arranged between the sliding block 27 and the movable rod 28, wherein the second elastic member 29 is a compression spring, a third limiting boss 281 is arranged on the movable rod 28 and used for abutting against the second elastic member 29, a limiting hole is arranged on the sliding block 27, the movable rod 28 penetrates through the limiting hole and is guided by the limiting hole, a fourth limiting boss 282 is arranged on one end of the movable rod 28 inside the fixed shell 26, the fourth limiting boss 282 is arranged on the side of the sliding block 27 away from the third limiting boss 281, and is used for limiting the position of the sliding block 27 and the movable rod 28, so as to prevent the movable rod 28 and the sliding block 27 from being separated, and a telescopic locking structure 60 is arranged between the movable rod 28 and the fixed shell 26 and used for locking the position of the movable rod 28, wherein the telescopic locking structure 60 is arranged in the same structure as a ball pen in the embodiment, when the movable rod 28 is pushed to the bottom, the telescopic locking structure 60 limits the position of the movable rod 28, so as to prevent the movable rod 28 from rebounding, and when the oxidation work of the aluminum profile 70 is completed, the movable rod 28 is pressed again, so that the movable rod 28 is restored to the original position, thereby releasing the aluminum profile 70, so as to facilitate taking out the aluminum profile 70.

[0057] When the supporting rod assembly 20 is inserted into the aluminum profile 70 and is rotated and locked, the movable rod 28 is pressed, the sliding block 27 is moved, the first supporting plate 51 and the second supporting plate 52 are rotated and extended, and abut against the upper and lower inner side walls of the aluminum profile 70, at this time, the sliding block 27 will not move together with the movable rod 28 under the elastic action of the second elastic member 29, and the second elastic member 29 is compressed, so as to avoid that the first supporting plate 51 and the second supporting plate 52 cause damage to the aluminum profile 70, then the position of the movable rod 28 is locked under the action of the telescopic locking structure 60, until the oxidation work is completed, after the telescopic locking structure 60 is unlocked by pressing the movable rod 28 again, the sliding block 27 can be moved towards the outside, and the aluminum profile 70 is unlocked, so as to facilitate taking out the aluminum profile 70.

[0058] The terms of direction mentioned in the utility model, for example, "upper", "lower", "left", "right" and the like, are only for better and clearer illustration and understanding of the utility model, and are not indicative or suggestive of the devices or elements indicated having specific orientation, being constructed and operated in specific orientation, and therefore cannot be understood as the limitation of the utility model.

[0059] The above describes the preferred embodiments of the utility model, but cannot be understood as the limitation of the claims. The utility model is not limited to the above embodiments, and the specific structure can be changed, and all kinds of changes made within the protection scope of the utility model independently claimed are within the protection scope of the utility model.

Claims

1. An apparatus for oxidizing an aluminum profile, comprising an oxidation tank, a hanger assembly, and a conveying assembly for moving the hanger assembly, characterized in that, The hanger assembly comprises a horizontal hanger crossbar and two vertical rods mounted on the hanger crossbar, and a support rod assembly for supporting the aluminum profile is arranged between the two vertical rods, and the support rod assembly is connected with the vertical rods through a locking mechanism, and the upper end of the vertical rod is provided with a bent end, and the vertical rod is hung on the hanger crossbar through the bent end.

2. The aluminum profile oxidizing apparatus according to claim 1, wherein The support rod assembly penetrates the aluminum profile, and the locking mechanism is a fixed clamp.

3. The aluminum profile oxidizing apparatus according to claim 1, wherein The locking mechanism comprises a circular through hole opened on the vertical rod, and the support rod assembly comprises a support rod body and a connecting rod mounted on both ends of the support rod, and the connecting rod is inserted into the circular through hole.

4. The aluminum profile oxidizing apparatus according to claim 3, wherein A first recess is arranged on the connecting rod, a first limiting buckle is rotatably connected in the first recess, and a first elastic member is further mounted between the first limiting buckle and the connecting rod.

5. The aluminum profile oxidizing apparatus according to claim 3, wherein The support rod body is a hollow pipe, and a plurality of second recesses are opened on the top surface of the support rod, and a support wheel is rotatably connected in the second recess, and the support rod abuts on the inner side wall of the aluminum profile through the support wheel.

6. The aluminum profile oxidizing apparatus according to claim 1, wherein The locking mechanism comprises a circular through hole opened on the vertical rod, and the support rod assembly is provided with two, and the two support rod assemblies are respectively inserted into the circular through holes of the two vertical rods, and the two ends of the support rod assembly are respectively provided with a first limiting boss.

7. The aluminum profile oxidizing apparatus according to claim 6, wherein A second limiting buckle is further fixedly connected on the support rod assembly, and a third recess for the second limiting buckle is further arranged on the side of the circular through hole.

8. The aluminum profile oxidizing apparatus according to claim 7, wherein The upper and lower ends of the vertical rod are respectively provided with a second limiting boss, and at least two limiting plates are arranged between the two vertical rods, and a plurality of limiting grooves for clamping on the second limiting boss are opened on both ends of the limiting plate.

9. The aluminum profile oxidizing apparatus according to claim 8, wherein The support rod assembly comprises a fixed shell, a sliding groove is opened on the fixed shell, a sliding block is slidably connected in the sliding groove, one end of the sliding block is connected with a movable rod, the movable rod extends to the outside of the fixed shell, a first supporting plate is rotatably connected on one end of the fixed shell, a second supporting plate is rotatably connected on the sliding block, and the first supporting plate and the second supporting plate are rotatably connected.

10. The apparatus according to claim 9, wherein A second elastic member is further arranged between the sliding block and the movable rod, a third limiting boss for abutting with the second elastic member is arranged on the movable rod, a limiting hole is opened on the sliding block, one end of the movable rod inside the fixed shell penetrates through the limiting hole, and the other end of the movable rod inside the fixed shell is further connected with a fourth limiting boss, and a telescopic locking structure for locking the position of the movable rod is further arranged between the movable rod and the fixed shell.

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