Sterilizer door with locking mechanism

By designing a sterilizer door with a locking mechanism, the problem of traditional sterilizer doors being prone to loosening is solved, achieving a stable lock and efficient seal, ensuring the safety and reliability of the sterilizer.

CN223516679UActive Publication Date: 2025-11-07ZHEJIANG MUSHROOM MEDICAL EQUIPMENT CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422634844.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-30
Publication Date
2025-11-07
Estimated Expiration
2034-10-30

AI Technical Summary

Technical Problem

Traditional sterilizer doors are often secured with latches or bolts that are prone to loosening or damage, affecting sealing and safety and posing safety hazards.

Method used

A sterilizer door with a locking mechanism was designed, including a circular door panel and a locking mechanism. The circular door panel is securely locked by the cooperation of a locking rod, a sleeve and an operating rod. The stability and durability are improved by using hinges and rolling bearings, and the sealing performance is enhanced.

Benefits of technology

It effectively prevents the sterilizer door from opening accidentally during operation, improving the sterilizer's safety and sealing performance, and extending its service life.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223516679U_ABST
    Figure CN223516679U_ABST
Patent Text Reader

Abstract

The utility model provides a sterilizer door with a locking mechanism, which comprises a circular door plate used for blocking the opening of a sterilizer sterilization bin and the locking mechanism, a screw rod is screwed in the middle of the outer side surface of the circular door plate, a lantern ring is fixedly arranged at one end of the screw rod far away from the circular door plate, and the lantern ring is fixedly sleeved on a rotating shaft; the rotating shaft is rotatably installed on the connecting arm, and one end of the connecting arm is provided with a bayonet. According to the sterilizer door with the locking mechanism provided by the utility model, the locking mechanism mainly comprises the locking rod, the hinging piece II, the sleeve and the operating rod, and when the locking rod is clamped into the bayonet, the operating rod is rotated to drive the sleeve to tightly press and lock one end, with the bayonet, of the connecting arm; therefore, the purpose of firmly locking the circular door plate at the opening of the sterilization bin of the sterilizer is achieved, the danger caused by the fact that the circular door plate is accidentally opened when the sterilizer works can be avoided, and the safety performance and the sealing performance of the sterilizer are effectively improved.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The utility model relates to sterilizer technical field, concretely relates to a sterilizer door with locking mechanism. BACKGROUND

[0002] The sterilizer is a kind of instrument that can kill or remove all microorganisms on transmission medium, including bacteria spores and non-pathogenic microorganisms, mainly including wet heat disinfection sterilization equipment, dry heat disinfection sterilization equipment and chemical disinfection sterilization equipment.

[0003] In the use process of the sterilizer, it is crucial to ensure the sealing property of sterilization bin to prevent sterilization medium leakage and external pollutants from entering. The traditional sterilizer door usually adopts simple lock catch or bolt fixation, these ways are prone to looseness or damage after frequent opening and closing or long-term use, thereby affecting sterilization effect, especially being prone to be opened by unintentional touch, and there is certain safety hazard. Therefore, a more stable and reliable locking mechanism is needed to ensure the sealing property and safety of sterilizer door, and for this purpose, a sterilizer door with locking mechanism is provided. SUMMARY

[0004] The utility model provides a sterilizer door with locking mechanism to solve the problems in the background art.

[0005] The specific technical scheme is as follows:

[0006] A sterilizer door with locking mechanism includes a circular door plate for plugging the sterilization bin opening of the sterilizer and a locking mechanism, wherein:

[0007] A screw rod is centrally screwed on the outer side of the circular door plate, a collar is fixedly installed at the end of the screw rod away from the circular door plate, the collar is fixedly sleeved on a rotating shaft, the rotating shaft is rotatably installed on a connecting arm, a bayonet is formed at one end of the connecting arm, and the other end of the connecting arm is hingedly connected to the side wall of the sterilizer with the sterilization bin opening through a hinging piece one;

[0008] The locking mechanism includes a locking rod, one end of the locking rod is hingedly connected to the side wall of the sterilizer with the sterilization bin opening through a hinging piece two, the locking rod can be clamped into the bayonet, a sleeve is threadedly sleeved at the other end of the locking rod, an operating rod is fixedly installed on the outer side of the sleeve, and when the locking rod is clamped into the bayonet, rotating the operating rod can drive the sleeve to press and lock the end of the connecting arm with the bayonet.

[0009] As a preferred scheme of the utility model, the hinging piece one and the hinging piece two are respectively distributed on both sides of the sterilization bin opening of the sterilizer.

[0010] As a preferred scheme of the utility model, the hinged part one includes a connecting block, the connecting block is hinged at one end of the connecting arm away from the bayonet through a pin shaft, the connecting block is installed on a matching seat through bolts, the matching seat is fixedly installed on the inner wall of the sterilizer, and the connecting block penetrates the side wall of the sterilizer with a sterilization bin mouth.

[0011] As a preferred scheme of the utility model, the hinged part two includes a U-shaped mounting seat, a mounting rod and a sleeve ring, the U-shaped mounting seat is fixedly installed on the inner wall of the sterilizer, an avoiding hole for avoiding the locking rod is formed in the side wall of the U-shaped mounting seat, the mounting rod is fixedly installed on the U-shaped mounting seat, the sleeve ring is movably sleeved on the mounting rod, and one end of the locking rod away from the sleeve is movably penetrated through the avoiding hole and fixedly connected with the outer side surface of the sleeve ring.

[0012] As a preferred scheme of the utility model, two stop rings are fixedly installed on the mounting rod, the sleeve ring is located between the two stop rings, and the sleeve ring is movably contacted with the two stop rings respectively.

[0013] As a preferred scheme of the utility model, a rolling bearing and a protection block are movably sleeved on the locking rod, the outer ring of the rolling bearing is fixedly connected with the inner wall of the sleeve, the inner ring of the rolling bearing is not contacted with the locking rod, the protection block is located at one end of the sleeve towards the sleeve ring, and the part of the protection block extending into the sleeve is fixedly connected with the inner ring of the rolling bearing.

[0014] As a preferred scheme of the utility model, the protection block is a T-shaped rubber block or a T-shaped silica gel block.

[0015] As a preferred scheme of the utility model, a spherical block is fixedly installed at one end of the operating rod away from the sleeve, and three operating rods are arranged at equal angles around the sleeve.

[0016] As a preferred scheme of the utility model, a silica gel sealing gasket is fixedly installed on the inner side surface of the circular door plate, and the size of the silica gel sealing gasket is matched with the size of the sterilization bin mouth of the sterilizer.

[0017] As a preferred scheme of the utility model, a matching block is fixedly installed in the U-shaped mounting seat, a damping rod is fixedly installed on the side surface of the matching block towards the sleeve, the damping rod is arranged through the side wall of the U-shaped mounting seat, a stop block is fixedly installed at the position close to the bayonet of the connecting arm, and the stop block can abut against the telescopic end of the damping rod.

[0018] The utility model has the following beneficial effects:

[0019] The sterilizer door with the locking mechanism provided by the utility model mainly consists of a circular door plate for plugging the sterilization bin opening of the sterilizer and a locking mechanism for locking the circular door plate at the sterilization bin opening of the sterilizer, the locking mechanism is mainly composed of a locking rod, a hinge piece two, a sleeve and an operating rod, when the locking rod is clamped into the bayonet, rotating the operating rod can drive the sleeve to press and lock the end of the connecting arm with the bayonet, so that the circular door plate is firmly locked at the sterilization bin opening of the sterilizer, the danger that the circular door plate is accidentally opened when the sterilizer works can be avoided, and the safety performance and the sealing performance of the sterilizer are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The sterilizer door with the locking mechanism provided by the utility model is installed on the sterilizer Figure One

[0021] Figure 2 The sterilizer door with the locking mechanism provided by the utility model is installed on the sterilizer Figure Two

[0022] Figure 3 The structure diagram of the sterilizer door with the locking mechanism provided by the utility model Figure One

[0023] Figure 4 The structure diagram of the sterilizer door with the locking mechanism provided by the utility model Figure Two

[0024] Figure 5 The structure diagram of the sterilizer door with the locking mechanism provided by the utility model Figure Three

[0025] Figure 6 The structure diagram of the sterilizer door with the locking mechanism provided by the utility model Figure Four

[0026] Figure 7 The local structure diagram of the sterilizer door with the locking mechanism provided by the utility model Figure One

[0027] Figure 8 The local structure diagram of the sterilizer door with the locking mechanism provided by the utility model Figure Two

[0028] Figure 9 The local structure diagram of the sterilizer door with the locking mechanism provided by the utility model Figure Three

[0029] ​​​​​​​​​In the drawings:

[0030] 1. A sterilizer;

[0031] 2. A locking mechanism; 201, a U-shaped mounting seat; 202, a mounting rod; 203, a sleeve ring; 204, a locking rod; 205, a fitting block; 206, a damping rod; 207, a stop block; 208, a sleeve; 209, an operating rod; 210, a stop ring; 211, a protection block; 212, a rolling bearing; 213, a avoiding hole;

[0032] 3. A circular door plate; 301, a silica gel sealing gasket;

[0033] 4. A connecting arm; 401, a rotating shaft; 402, a sleeve ring; 403, a screw rod; 404, a bayonet;

[0034] 5. A connecting block; 501, a fitting seat; 502, a pin shaft. DETAILED DESCRIPTION

[0035] The technical solutions of the present application will be further described below in combination with the drawings and through specific embodiments.

[0036] It should be understood that the drawings are only used for illustrative description, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation of the present patent; in order to better illustrate the embodiments of the present application, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0037] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, structure and operation, therefore the terms describing the positional relationship in the drawings are only used for illustrative description, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] In the description of the utility model, unless another explicit provision and limitation, if the connection between the components appears the term "connection" and the like indicates the connection relationship, the term should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be the communication inside two components or the interaction relationship of two components. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0039] Embodiment

[0040] The sterilizer door with locking mechanism provided by the embodiment comprises a circular door plate 3 for plugging the sterilization bin opening of a sterilizer 1 and a locking mechanism 2. Figures 1-9 As shown in the figure, the locking mechanism 2 comprises a locking rod 204, one end of the locking rod 204 is hinged to the side wall of the sterilizer 1 having the sterilization bin opening through a hinge piece two, and the other end of the locking rod 204 is threadedly sleeved with a sleeve 208, the outer side surface of the sleeve 208 is fixedly installed with an operating rod 209.

[0041] The outer side surface of the circular door plate 3 is centrally screwed with a screw rod 403, one end of the screw rod 403 away from the circular door plate 3 is fixedly installed with a collar 402, the collar 402 is fixedly sleeved on a rotating shaft 401, the rotating shaft 401 is rotatably installed on a connecting arm 4, one end of the connecting arm 4 is provided with a bayonet 404, and the other end of the connecting arm 4 is hinged to the side wall of the sterilizer 1 having the sterilization bin opening through a hinge piece one. The screw rod 403, the collar 402 and the rotating shaft 401 cooperate with each other to enable the circular door plate 3 to rotate relative to the connecting arm 4, so as to ensure that the circular door plate 3 can be covered on the sterilization bin opening of the sterilizer 1, thereby ensuring the plugging effect of the circular door plate 3 on the sterilization bin opening of the sterilizer 1.

[0042] When the locking rod 204 is clamped into the bayonet 404, rotating the operating rod 209 can drive the sleeve 208 to press and lock one end of the connecting arm 4 with the bayonet 404.

[0043] The sterilizer door with the locking mechanism mainly comprises a circular door plate 3 for plugging the sterilization chamber of the sterilizer 1 and a locking mechanism 2 for locking the circular door plate 3 at the sterilization chamber of the sterilizer 1. The locking mechanism 2 mainly comprises a locking rod 204, a hinge part II, a sleeve 208 and an operating rod 209. When the locking rod 204 is clamped in the notch 404, rotating the operating rod 209 can drive the sleeve 208 to press and lock the end of the connecting arm 4 with the notch 404, thereby achieving the purpose of firmly locking the circular door plate 3 at the sterilization chamber of the sterilizer 1. This can avoid the danger of the circular door plate 3 being accidentally opened during the operation of the sterilizer 1, and effectively improve the safety performance and sealing performance of the sterilizer 1.

[0044] Specifically, in the embodiment, the hinge part I and the hinge part II are arranged on both sides of the sterilization chamber of the sterilizer 1 to meet the installation requirements of the circular door plate 3.

[0045] Specifically, in the embodiment, the hinge part I comprises a connecting block 5 which is hingedly connected to one end of the connecting arm 4 away from the notch 404 through a pin shaft 502. The connecting block 5 is installed on a fitting seat 501 through bolts, and the fitting seat 501 is fixedly installed on the inner wall of the sterilizer 1. The connecting block 5 penetrates through the side wall of the sterilization chamber of the sterilizer 1. The hinge part I mainly comprises the connecting block 5, the pin shaft 502 and the fitting seat 501, so that the connecting arm 4 can stably rotate around the pin shaft 502, and the long-term frequent use requirement can be met.

[0046] Specifically, in the embodiment, the hinge part II comprises a U-shaped mounting seat 201, a mounting rod 202 and a sleeve ring 203. The U-shaped mounting seat 201 is fixedly installed on the inner wall of the sterilizer 1, and the side wall of the U-shaped mounting seat 201 is provided with an avoiding hole 213 for avoiding the locking rod 204. The mounting rod 202 is fixedly installed on the U-shaped mounting seat 201, and the sleeve ring 203 is movably installed on the mounting rod 202. One end of the locking rod 204 away from the sleeve 208 movably penetrates through the avoiding hole 213 and is fixedly connected to the outer side of the sleeve ring 203. The hinge part II mainly comprises the U-shaped mounting seat 201, the mounting rod 202 and the sleeve ring 203, so that the locking rod 204 can stably rotate around the mounting rod 202, and the long-term frequent use requirement can be met.

[0047] Specifically, in the embodiment, two stop rings 210 are fixedly installed on the mounting rod 202, and the sleeve ring 203 is located between the two stop rings 210 and movably contacts the two stop rings 210. The two stop rings 210 are arranged to limit the sleeve ring 203, so as to limit the locking rod 204, thereby ensuring that the locking rod 204 can be accurately clamped in the notch 404.

[0048] Specifically, in the embodiment, the locking rod 204 is movably sleeved with a rolling bearing 212 and a protective block 211. The outer ring of the rolling bearing 212 is fixedly connected with the inner wall of the sleeve 208, and the inner ring of the rolling bearing 212 is not in contact with the locking rod 204. The protective block 211 is located at one end of the sleeve 208 facing the sleeve 203, and the part of the protective block 211 extending into the sleeve 208 is fixedly connected with the inner ring of the rolling bearing 212. The protective block 211 is arranged to prevent the sleeve 208 from damaging the connecting arm 4, and to improve the stability of the sleeve 208 when pressing the connecting arm 4. The rolling bearing 212 is arranged to prevent the protective block 211 from moving randomly and rotating with the sleeve 208, so as to avoid the mutual friction between the protective block 211 and the connecting arm 4, thereby affecting the use.

[0049] Specifically, in the embodiment, in order to ensure the protection effect of the protective block 211, the protective block 211 is arranged as a T-shaped rubber block or a T-shaped silica gel block.

[0050] Specifically, in the embodiment, in order to improve the operation feeling of the operating rod 209, a spherical block is fixedly installed at one end of the operating rod 209 away from the sleeve 208. Three operating rods 209 are arranged at equal angles around the sleeve 208.

[0051] Specifically, in the embodiment, in order to improve the sealing performance between the circular door plate 3 and the sterilization chamber opening of the sterilizer 1, a silica gel sealing gasket 301 is fixedly installed on the inner side of the circular door plate 3. The size of the silica gel sealing gasket 301 is matched with the size of the sterilization chamber opening of the sterilizer 1, that is, the diameter of the silica gel sealing gasket 301 is slightly larger than the diameter of the sterilization chamber opening of the sterilizer 1.

[0052] Specifically, in the embodiment, in order to avoid the impact between the circular door plate 3 and the sterilization chamber opening of the sterilizer 1 when the circular door plate 3 is closed, a fitting block 205 is fixedly installed in the inside of the shaped mounting seat 201. A damping rod 206 is fixedly installed on one side of the fitting block 205 facing the sleeve 208. The damping rod 206 penetrates through the side wall of the shaped mounting seat 201. A stop block 207 is fixedly installed at the position close to the bayonet 404 of the connecting arm 4. The stop block 207 can abut against the telescopic end of the damping rod 206. The damping rod 206 and the stop block 207 cooperate to avoid the impact between the circular door plate 3 and the sterilization chamber opening of the sterilizer 1 when the circular door plate 3 is closed, thereby ensuring the service life of the sterilizer 1.

[0053] In summary, the sterilizer door with a locking mechanism provided in the embodiment realizes stable locking and efficient sealing of the sterilizer door through the following technical effects:

[0054] 1. Circular door plate 3: tightly combined with the sterilization chamber opening of the sterilizer 1 to ensure the sealing performance.

[0055] 2. Locking mechanism 2: Achieve stable locking through the cooperation of locking rod 204, sleeve 208 and operating rod 209.

[0056] 3. Hinge 1 and hinge 2: Ensure the stable rotation of circular door plate 3 and locking rod 204.

[0057] 4. Rolling bearing 212 and protective block 211: Improve the stability and durability of the locking mechanism and prevent damage to connecting arm 4.

[0058] 5. Silicone gasket 301: Enhance the sealing between circular door plate 3 and the opening of the sterilization chamber.

[0059] 6. Damping rod 206 and stop block 207: Avoid impact between circular door plate 3 and the opening of the sterilization chamber when closing

[0060] Workflow

[0061] 1. Open the circular door plate 3:

[0062] Turn the operating rod 209 to loosen the sleeve 208 on the connecting arm 4.

[0063] The locking rod 204 is released from the bayonet 404, allowing the connecting arm 4 and the circular door plate 3 to rotate around the rotating shaft 401.

[0064] 2. Close and lock the circular door plate 3:

[0065] Cover the circular door plate 3 on the opening of the sterilization chamber of the sterilizer 1, ensuring that the silicone gasket 301 tightly fits the opening.

[0066] Turn the connecting arm 4 so that the bayonet 404 is aligned with the locking rod 204.

[0067] Turn the operating rod 209 to drive the sleeve 208 to press the connecting arm 4, so that the locking rod 204 firmly enters the bayonet 404.

[0068] 3. Damping buffer:

[0069] During the closing process, the stop block 207 touches the telescopic end of the damping rod 206, slowing down the closing speed of the circular door plate 3 to avoid impact.

[0070] 4. Long-term stability and sealing:

[0071] Rolling bearing 212 and protective block 211 ensure the stability and durability of the locking mechanism under long-term frequent use.

[0072] Silicone gasket 301 maintains the tight sealing between the circular door plate 3 and the opening of the sterilization chamber.

[0073] Through the above workflow and technical effects, the sterilizer door with the locking mechanism provided in the embodiment realizes stable locking and efficient sealing of the sterilizer door, and ensures safety and reliability of the sterilizer.

[0074] The above is only the preferred embodiment of the present application, and does not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious change obtained by applying the content of the present application and drawings should be included in the protection scope of the present application.

Claims

1. A sterilizer door with a locking mechanism, characterized in that, The application relates to a circular door plate (3) and a locking mechanism (2) for sealing the sterilization chamber opening of a sterilizer (1), wherein: A screw rod (403) is centrally screwed on the outer side of the circular door plate (3), one end of the screw rod (403) is fixedly installed with a sleeve ring (402), the sleeve ring (402) is fixedly sleeved on a rotating shaft (401), the rotating shaft (401) is rotatably installed on a connecting arm (4), one end of the connecting arm (4) is provided with a bayonet (404), and the other end of the connecting arm (4) is hingedly connected to the side wall of the sterilizer (1) with the sterilization chamber opening through a hinging piece one. The locking mechanism (2) comprises a locking rod (204), one end of the locking rod (204) is hingedly connected to the side wall of the sterilizer (1) with the sterilization chamber opening through a hinging piece two, the locking rod (204) can be clamped into the bayonet (404), the other end of the locking rod (204) is threadedly sleeved with a sleeve (208), the outer side of the sleeve (208) is fixedly installed with an operating rod (209), when the locking rod (204) is clamped into the bayonet (404), rotating the operating rod (209) can drive the sleeve (208) to press and lock the one end of the connecting arm (4) with the bayonet (404).

2. The sterilizer door with locking mechanism of claim 1, wherein, The hinging piece one and the hinging piece two are respectively arranged on the two sides of the sterilization chamber opening of the sterilizer (1).

3. The sterilizer door with locking mechanism of claim 2, wherein, The hinging piece one comprises a connecting block (5), the connecting block (5) is hingedly connected to one end of the connecting arm (4) away from the bayonet (404) through a pin shaft (502), the connecting block (5) is installed on a matching seat (501) through a bolt, the matching seat (501) is fixedly installed on the inner wall of the sterilizer (1), and the connecting block (5) penetrates through the side wall of the sterilizer (1) with the sterilization chamber opening.

4. The sterilizer door with locking mechanism of claim 3, wherein, The hinging piece two comprises a U-shaped mounting seat (201), a mounting rod (202) and a sleeve ring (203), the U-shaped mounting seat (201) is fixedly installed on the inner wall of the sterilizer (1), the side wall of the U-shaped mounting seat (201) is provided with an avoiding hole (213) for avoiding the locking rod (204), the mounting rod (202) is fixedly installed on the U-shaped mounting seat (201), the sleeve ring (203) is movably sleeved on the mounting rod (202), one end of the locking rod (204) away from the sleeve (208) movably penetrates through the avoiding hole (213) and is fixedly connected with the outer side of the sleeve ring (203).

5. The sterilizer door with locking mechanism of claim 4, wherein, Two stop rings (210) are fixedly installed on the mounting rod (202), the sleeve ring (203) is located between the two stop rings (210), and the sleeve ring (203) movably contacts the two stop rings (210) respectively.

6. The door for sterilizers with locking mechanism according to claim 4, characterized in that, The locking rod (204) is movably sleeved with a rolling bearing (212) and a protection block (211), the outer ring of the rolling bearing (212) is fixedly connected with the inner wall of the sleeve (208), the inner ring of the rolling bearing (212) is not in contact with the locking rod (204), the protection block (211) is located at one end of the sleeve (208) towards the sleeve (203), and the part of the protection block (211) extending into the sleeve (208) is fixedly connected with the inner ring of the rolling bearing (212).

7. The door for sterilizers with locking mechanism according to claim 6, characterized in that, The protection block (211) is a T-shaped rubber block or a T-shaped silica gel block.

8. The door for sterilizers with locking mechanism according to claim 6, characterized in that, A spherical block is fixedly installed at one end of the operating rod (209) away from the sleeve (208), and three operating rods (209) are arranged at equal angles around the sleeve (208).

9. The door for sterilizers with locking mechanism according to any one of claims 1-8, characterized in that, A silica gel sealing gasket (301) is fixedly installed on the inner side of the circular door plate (3), and the size of the silica gel sealing gasket (301) is matched with the size of the sterilization chamber opening of the sterilizer (1).

10. The door for sterilizers with locking mechanism according to claim 4, characterized in that, A matching block (205) is fixedly installed in the inside of the shaped mounting seat (201), a damping rod (206) is fixedly installed on one side of the matching block (205) towards the sleeve (208), the damping rod (206) penetrates through the side wall of the shaped mounting seat (201), a stop block (207) is fixedly installed at the position close to the bayonet (404) of the connecting arm (4), and the stop block (207) can abut against the telescopic end of the damping rod (206).