Integrated automobile lifter motor glass clamping device

By designing a motor glass clamping device for automotive lifter including mounting parts, limiting parts and pushing parts, the problems of low installation efficiency and poor connection stability in the prior art are solved, and the effects of rapid installation and high stability are achieved.

CN222921350UActive Publication Date: 2025-05-30NINGBO SHITONG AUTOMOBILE PARTS CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421659435.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-15
Publication Date
2025-05-30
Estimated Expiration
2034-07-15

AI Technical Summary

Technical Problem

In the prior art, the glass is fixed with the vehicle lift by bolts, resulting in inefficient installation and the bolts may loosen when the vehicle vibrates for a long time, affecting the stability of the connection.

Method used

An integrated automotive lifter motor glass clamping device is designed, using installation components including mounting parts, limiting parts and pushing parts. Through the cooperation of these components, the glass and lift can be quickly fixed without installing and fastening bolts one by one.

Benefits of technology

The rapid installation of glass is achieved, the installation efficiency is improved, and the elastic design resists vehicle vibrations, reducing the possibility of loosening and ensuring the stability of the connection.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222921350U_ABST
    Figure CN222921350U_ABST
Patent Text Reader

Abstract

The utility model discloses an integrated automobile lifter motor glass clamping device which comprises a main body assembly and an installation assembly, the main body assembly comprises automobile glass, a glass frame and a base, the glass frame is arranged on the outer side of the automobile glass in a sleeved mode, the base is arranged at the bottom of the glass frame, and the installation assembly is arranged on the base. Comprising a mounting part, a limiting part and a pushing part, the mounting part is arranged on the base, the limiting part is located on the mounting part, and the pushing part is arranged on the limiting part. The glass lifter has the advantages that the glass and the lifter can be fixed together through the installation assembly, bolts do not need to be installed and fastened one by one, connection can be rapidly completed, the installation efficiency is greatly improved, certain elasticity is achieved, vehicle vibration can be better resisted, and the loosening possibility is reduced.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of automotive engineering, in particular to an integrated motor glass clamping device for vehicle window lifters. Background Art

[0002] A vehicle window lifter is a device for lifting and lowering the window glass of an automobile, mainly used to control the rising and falling of the window glass, so that the driver and passengers can conveniently adjust the opening and closing state of the window according to their needs. When the driver and passengers operate the switch, the motor rotates and drives the steel wire rope or the pull rod to move through the transmission mechanism, so as to realize the lifting and lowering action of the glass. In the prior art, the glass is fixed to the window lifter by bolts. The bolts need to be installed and tightened one by one, which consumes a lot of time and manpower and reduces the installation efficiency. In the case of long-term vibration of the vehicle, etc., the bolts may gradually loosen, affecting the stability of the connection. Summary of the Utility Model

[0003] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0004] In view of the above and / or problems existing in the existing integrated motor glass clamping device for vehicle window lifters, the present utility model is proposed.

[0005] Therefore, the problem to be solved by the present utility model is that in the prior art, the glass is fixed to the window lifter by bolts. The bolts need to be installed and tightened one by one, which consumes a lot of time and manpower and reduces the installation efficiency. In the case of long-term vibration of the vehicle, etc., the bolts may gradually loosen, affecting the stability of the connection.

[0006] To solve the above technical problems, the present utility model provides the following technical solution: an integrated motor glass clamping device for vehicle window lifters, which includes a main body assembly, including an automotive glass, a glass frame and a base. The glass frame is sleeved outside the automotive glass, and the base is arranged at the bottom of the glass frame;

[0007] An installation assembly, arranged on the base, includes a mounting member, a limiting member and a pushing member. The mounting member is arranged on the base, the limiting member is located on the mounting member, and the pushing member is arranged on the limiting member.

[0008] As a preferred scheme of the integrated motor glass clamping device for vehicle window lifters of the present utility model, wherein: the mounting member includes a clamping plate and a rotating shaft. The clamping plate is located inside the base, and the rotating shaft is inserted on one side of the clamping plate.

[0009] As a preferred embodiment of the integral motor glass clamping device for vehicle window lifters of the present utility model, the following applies: The mounting member further includes a rotating bar and a first torsion spring. The rotating bar is fixed to one end of the rotating shaft, and the first torsion spring is sleeved outside the rotating bar.

[0010] As a preferred embodiment of the integral motor glass clamping device for vehicle window lifters of the present utility model, the following applies: The mounting member further includes a rotating disk. The rotating disk is fixed to one end of the rotating bar, one end of the first torsion spring is fixed to one side of the rotating disk, and the other end is fixed to one side of the base.

[0011] As a preferred embodiment of the integral motor glass clamping device for vehicle window lifters of the present utility model, the following applies: The limiting member includes a limiting block and a supporting disk. The supporting disk is sleeved outside the rotating shaft, and the limiting block is hinged inside the supporting disk.

[0012] As a preferred embodiment of the integral motor glass clamping device for vehicle window lifters of the present utility model, the following applies: The limiting member further includes a first spring and a toothed frame. One end of the first spring is fixed to the bottom of the limiting block, the other end is fixed to the inner wall of the supporting disk, and the toothed frame is sleeved outside the supporting disk.

[0013] As a preferred embodiment of the integral motor glass clamping device for vehicle window lifters of the present utility model, the following applies: The limiting member further includes a second spring and a positioning frame. One end of the second spring is fixed to one side of the toothed frame, the other end is fixed to one side of the base. The positioning frame is sleeved outside the toothed frame, and the positioning frame and the toothed frame are movably connected.

[0014] As a preferred embodiment of the integral motor glass clamping device for vehicle window lifters of the present utility model, the following applies: The pushing member includes a moving frame and a pushing block. The moving frame is fixed to the bottom of the toothed frame, and the pushing block is arranged below the moving frame.

[0015] As a preferred embodiment of the integral motor glass clamping device for vehicle window lifters of the present utility model, the following applies: The pushing member further includes a pushing frame and a protective shell. The pushing frame is fixed to the bottom of the pushing block, and the protective shell is fixed to one side of the base.

[0016] As a preferred embodiment of the integral motor glass clamping device for vehicle window lifters of the present utility model, the following applies: The pushing member further includes a moving rod, a supporting sleeve and a third spring. The moving rod is fixed to the bottom of the pushing frame, the supporting sleeve is sleeved outside the moving rod, the supporting sleeve and the moving rod are movably connected, and one end of the third spring is fixed to the bottom of the moving rod, and the other end is fixed to the inner wall of the supporting sleeve.

[0017] The beneficial effects of the present utility model are as follows: Through the setting of the installation component, the glass can be fixed to the window lifter, eliminating the need to install and tighten bolts one by one. The connection can be completed quickly, greatly improving the installation efficiency. Moreover, it has a certain elasticity, which can better resist vehicle vibrations and reduce the possibility of loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0019] Figure 1 FIG. 10 is an overall structure diagram of an integrated motor glass clamping device for a vehicle window lifter.

[0020] Figure 2 FIG. 14 is a sectional structure diagram of the base of an integrated motor glass clamping device for a vehicle window lifter.

[0021] Figure 3 FIG. 18 is a Figure 2 locally enlarged structure diagram at position A of an integrated motor glass clamping device for a vehicle window lifter.

[0022] Figure 4 FIG. 24 is a sectional structure diagram of the protective shell of an integrated motor glass clamping device for a vehicle window lifter.

[0023] Figure 5 FIG. 28 is a Figure 4 locally enlarged structure diagram at position B of an integrated motor glass clamping device for a vehicle window lifter.

[0024] Figure 6 FIG. 34 is a structure diagram of the push block of an integrated motor glass clamping device for a vehicle window lifter.

[0025] Figure 7 FIG. 38 is a sectional structure diagram of the positioning frame of an integrated motor glass clamping device for a vehicle window lifter.

[0026] Figure 8 FIG. 42 is a Figure 7 locally enlarged structure diagram at position C of an integrated motor glass clamping device for a vehicle window lifter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.

[0028] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0029] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments.

[0030] Embodiment 1

[0031] Referring to Figures 1 to 8 , which is the first embodiment of the present utility model. This embodiment provides an integrated motor glass clamping device for a vehicle window lifter. The integrated motor glass clamping device for a vehicle window lifter includes a main body assembly 100 and a mounting assembly 200. The two cooperate to fix the glass and the window lifter together, eliminating the need to individually install and tighten bolts, and enabling quick connection.

[0032] The main body assembly 100 includes an automotive glass 101, a glass frame 102, and a base 103. The glass frame 102 is sleeved outside the automotive glass 101, and the base 103 is disposed at the bottom of the glass frame 102.

[0033] The automotive glass 101 functions to shield against wind and rain, block external debris, and provide a view, etc. It is an important component for ensuring the in-vehicle environment and driving safety. The glass frame 102 is used to fix and support the automotive glass 101, keeping the automotive glass 101 in a stable position and shape, and ensuring the smoothness and safety of the automotive glass 101 during movements such as lifting and lowering. The base 103 provides a mounting foundation and support for the glass frame 102 and related components, ensuring the stable installation of the entire automotive glass 101 lifting system and related structures. By driving the base 103 to lift through a motor, the lifting of the automotive glass 101 is completed.

[0034] The mounting assembly 200 is disposed on the base 103 and includes a mounting member 201, a limiting member 202, and a pushing member 203. The mounting member 201 is disposed on the base 103, the limiting member 202 is located on the mounting member 201, and the pushing member 203 is disposed on the limiting member 202.

[0035] The installation components 200 are in two groups and are both arranged on the base 103. Through the arrangement of the installation parts 201, the vehicle glass 101 can be quickly installed on the base 103 without bolt installation, improving the efficiency. After the vehicle glass 101 is installed, through the arrangement of the limiting parts 202, the installation parts 201 can be limited to prevent the installation parts 201 from moving by themselves and causing the fixation of the vehicle glass 101 to become loose. When it is necessary to release the limitation of the vehicle glass 101, by moving the pushing part 203, the pushing part 203 drives the limiting part 202 to move, and the movement of the limiting part 202 releases the limitation of the installation part 201, and then the vehicle glass 101 can be disassembled.

[0036] Embodiment 2

[0037] Refer to Figures 1 to 8 , which is the second embodiment of the present utility model, and this embodiment is based on the previous embodiment.

[0038] Specifically, the installation part 201 includes a clamping plate 201a and a rotating shaft 201b. The clamping plate 201a is located inside the base 103, and the rotating shaft 201b is inserted on one side of the clamping plate 201a.

[0039] After the vehicle glass 101 is placed inside the base 103, the vehicle glass 101 will squeeze the clamping plate 201a to make the clamping plate 201a flip. At this time, the flipped clamping plate 201a will squeeze the bottom of the vehicle glass 101, so as to fix the vehicle glass 101. The rotating shaft 201b is inserted inside the base 103, and the rotating shaft 201b is movably connected to the base 103. When the clamping plate 201a rotates, the rotating shaft 201b will also rotate. At this time, the rotating shaft 201b can support the clamping plate 201a to prevent the clamping plate 201a from shifting.

[0040] Specifically, the installation part 201 further includes a rotating bar 201c and a first torsion spring 201d. The rotating bar 201c is fixed to one end of the rotating shaft 201b, and the first torsion spring 201d is sleeved outside the rotating bar 201c.

[0041] When the clamping plate 201a flips to fix the vehicle glass 101, the rotating shaft 201b will drive the rotating bar 201c to rotate. By rotating the rotating bar 201c, a torsional force can be applied to the first torsion spring 201d. After the clamping plate 201a flips to complete the fixation of the vehicle glass 101, when it is necessary to remove the vehicle glass 101, the rotating bar 201c can be driven to rotate back by the returning force of the first torsion spring 201d. At this time, the clamping plate 201a can be driven to rotate back, and the vehicle glass 101 can be ejected from the base 103 through the rotation of the clamping plate 201a. At this time, the vehicle glass 101 can be disassembled.

[0042] Specifically, the mounting member 201 further includes a rotating disk 201e. The rotating disk 201e is fixed to one end of the rotating bar 201c. One end of the first torsion spring 201d is fixed to one side of the rotating disk 201e, and the other end is fixed to one side of the base 103.

[0043] The rotation of the rotating bar 201c can drive the rotation of the rotating disk 201e. By rotating the rotating disk 201e, a torsional force can be applied to the first torsion spring 201d. When it is necessary to remove the vehicle glass 101, the rotating bar 201c can be driven to rotate back by the returning force of the first torsion spring 201d. At this time, the clamping plate 201a can be driven to rotate back to remove the vehicle glass 101.

[0044] Specifically, the limiting member 202 includes a limiting block 202a and a supporting disk 202b. The supporting disk 202b is sleeved outside the rotating shaft 201b, and the limiting block 202a is hinged inside the supporting disk 202b.

[0045] When the clamping plate 201a flips to fix the vehicle glass 101, the rotating shaft 201b will drive the supporting disk 202b to rotate. At this time, in order to prevent the rotating shaft 201b from rotating back due to the returning force of the first torsion spring 201d, the rotating shaft 201b can be limited by the setting of the limiting block 202a to prevent the rotating shaft 201b from rotating back.

[0046] Specifically, the limiting member 202 further includes a first spring 202c and a tooth frame 202d. One end of the first spring 202c is fixed to the bottom of the limiting block 202a, and the other end is fixed to the inner wall of the supporting disk 202b. The tooth frame 202d is sleeved outside the supporting disk 202b.

[0047] A limiting groove corresponding to the limiting block 202a is provided on the tooth frame 202d. When the clamping plate 201a flips to fix the vehicle glass 101, the supporting disk 202b will drive the limiting block 202a to rotate. At this time, the limiting block 202a can be squeezed through the setting of the limiting groove, so that the limiting block 202a is not limited. When the limiting block 202a is squeezed, the limiting block 202a will apply a squeezing force to the first spring 202c. When the limiting block 202a is moved to the next limiting groove, the returning force of the first spring 202c can make the limiting block 202a move to the next limiting groove. At this time, the limiting block 202a can be limited through the setting of the limiting groove, thereby preventing the clamping plate 201a from reversing.

[0048] Specifically, the limiting member 202 further includes a second spring 202e and a positioning frame 202f. One end of the second spring 202e is fixed to one side of the tooth frame 202d, and the other end is fixed to one side of the base 103. The positioning frame 202f is sleeved outside the tooth frame 202d, and the positioning frame 202f and the tooth frame 202d are movably connected.

[0049] Teeth are provided on the outer side of the tooth frame 202d, and tooth grooves are provided in the positioning frame 202f. The teeth slide within the tooth grooves. When it is necessary to reverse the clamping plate 201a to remove the vehicle glass 101, by moving the tooth frame 202d, the tooth frame 202d is separated from the limit block 202a, thereby the limitation on the clamping plate 201a can be released, and the clamping plate 201a can be reversed. When moving the tooth frame 202d, a pulling force can be applied to the second spring 202e. The tooth frame 202d can return to its original position by the elastic force of the second spring 202e, and the tooth frame 202d is re-engaged with the limit block 202a, thereby the limit block 202a can be limited again for the next use.

[0050] Embodiment 3

[0051] Referring to Figures 1 to 8 , this is the third embodiment of the present utility model, and this embodiment is based on the first two embodiments.

[0052] Specifically, the pushing member 203 includes a moving frame 203a and a pushing block 203b. The moving frame 203a is fixed to the bottom of the tooth frame 202d, and the pushing block 203b is arranged below the moving frame 203a.

[0053] A sliding groove is provided on one side of the base 103, and a sliding block is provided on one side of the pushing block 203b. The sliding block slides within the sliding groove. When it is necessary to move the tooth frame 202d, by moving the pushing block 203b, the movement of the pushing block 203b can squeeze the moving frame 203a to make it move, and the movement of the moving frame 203a can drive the tooth frame 202d to move.

[0054] Specifically, the pushing member 203 further includes a pushing frame 203c and a protective shell 203d. The pushing frame 203c is fixed to the bottom of the pushing block 203b, and the protective shell 203d is fixed to one side of the base 103.

[0055] A dialing block is provided on one side of the pushing frame 203c, and a moving groove is provided on one side of the protective shell 203d. The dialing block slides within the moving groove. By dialing the dialing block, the movement of the dialing block can drive the pushing frame 203c to move. At this time, the movement of the pushing frame 203c can drive the pushing block 203b to squeeze the moving frame 203a. The protective shell 203d is used to protect the pushing frame 203c to prevent the pushing frame 203c from being damaged by being hit by external sundries.

[0056] Specifically, the pushing member 203 further includes a moving rod 203e, a support sleeve 203f, and a third spring 203g. The moving rod 203e is fixed to the bottom of the pushing frame 203c, the support sleeve 203f is sleeved outside the moving rod 203e, the support sleeve 203f and the moving rod 203e are movably connected, and one end of the third spring 203g is fixed to the bottom of the moving rod 203e, and the other end is fixed to the inner wall of the support sleeve 203f.

[0057] When the pushing frame 203c is moved, it can drive the moving rod 203e to move. When the moving rod 203e moves, it can exert a pulling force on the third spring 203g. When the pushing frame 203c moves, it can drive the pushing block 203b to squeeze the moving frame 203a. Then, through the resilience of the third spring 203g, the moving rod 203e can return to its original position, thereby driving the pushing block 203b to release the extrusion on the moving frame 203a. The support sleeve 203f is fixed to the inner wall of the protective shell 203d. Through the setting of the support sleeve 203f, the moving rod 203e can be supported to prevent the moving rod 203e from shifting during movement.

[0058] During use, when it is necessary to fix the vehicle glass 101, first place the vehicle glass 101 in the base 103. The vehicle glass 101 will squeeze the clamping plate 201a to make the clamping plate 201a flip. At this time, the flipped clamping plate 201a will squeeze the bottom of the vehicle glass 101, thereby fixing the vehicle glass 101. When the clamping plate 201a flips to fix the vehicle glass 101, the rotating shaft 201b will drive the rotating bar 201c to rotate. Through the rotation of the rotating bar 201c, the rotating disk 201e can be driven to rotate. Through the rotation of the rotating disk 201e, a torsional force can be applied to the first torsion spring 201d. At this time, the other end of the rotating shaft 201b will drive the support disk 202b to rotate. When the support disk 202b rotates, it will drive the limit block 202a to rotate. At this time, through the setting of the limit groove, the limit block 202a can be squeezed, so that the limit block 202a will not be limited. When the limit block 202a is squeezed, the limit block 202a will exert a squeezing force on the first spring 202c. When the limit block 202a is moved to the next limit groove, through the resilience of the first spring 202c, the limit block 202a can be moved to the next limit groove. At this time, through the setting of the limit groove, the limit block 202a can be limited, thereby preventing the clamping plate 201a from reversing, and thus the installation of the vehicle glass 101 can be completed.

[0059] When the automobile glass 101 needs to be removed, the shifting block is shifted, and the movement of the shifting block can drive the push frame 203c to move, and when the push frame 203c moves, the moving rod 203e can be driven to move, and the movement of the moving rod 203e can apply a pulling force to the third spring 203g. At this time, the movement of the push frame 203c can drive the push block 203b to squeeze the moving frame 203a to make it move, and the movement of the moving frame 203a can drive the tooth frame 202d to move, and when the tooth frame 202d is moved, a pulling force can be applied to the second spring 202e, and the tooth frame 202d is moved to separate from the limit block 202a, so that the automobile glass 101 can be removed. In addition to limiting the card plate 201a, the rotation force of the first torsion spring 201d can make the card plate 201a reverse, and at this time, the automobile glass 101 can be pushed out from the base 103 by the reversal of the card plate 201a, thereby completing the disassembly of the automobile glass 101, and then the push block is released, and the rebound force of the third spring 203g can make the moving rod 203e return to its original position, thereby driving the pushing block 203b to release the squeezing of the moving frame 203a, and then the rebound force of the second spring 202e can make the tooth frame 202d return to its original position, so that the tooth frame 202d and the limiting block 202a are re-engaged, so that the limiting block 202a can be limited again for the next use.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An integrated automobile lifter motor glass clamping device, characterized in that: include, A main body component (100) comprises an automobile glass (101), a glass frame (102) and a base (103), wherein the glass frame (102) is sleeved on the outside of the automobile glass (101), and the base (103) is arranged at the bottom of the glass frame (102); A mounting assembly (200) is arranged on the base (103), comprising a mounting member (201), a limiting member (202) and a pushing member (203), wherein the mounting member (201) is arranged on the base (103), the limiting member (202) is located on the mounting member (201), and the pushing member (203) is arranged on the limiting member (202); The mounting member (201) comprises a card plate (201a) and a rotating shaft (201b), wherein the card plate (201a) is located inside the base (103), and the rotating shaft (201b) is plugged into one side of the card plate (201a); The mounting member (201) further comprises a rotating bar (201c) and a first torsion spring (201d), wherein the rotating bar (201c) is fixed to one end of the rotating shaft (201b), and the first torsion spring (201d) is sleeved on the outside of the rotating bar (201c); The mounting member (201) further comprises a rotating disk (201e), wherein the rotating disk (201e) is fixed to one end of the rotating bar (201c); one end of the first torsion spring (201d) is fixed to one side of the rotating disk (201e), and the other end is fixed to one side of the base (103); The limiting member (202) comprises a limiting block (202a) and a supporting plate (202b); the supporting plate (202b) is sleeved on the outside of the rotating shaft (201b); and the limiting block (202a) is hinged inside the supporting plate (202b); The limiting member (202) further comprises a first spring (202c) and a tooth frame (202d), wherein one end of the first spring (202c) is fixed to the bottom of the limiting block (202a), and the other end is fixed to the inner wall of the supporting plate (202b), and the tooth frame (202d) is sleeved on the outer side of the supporting plate (202b); The limiting member (202) further comprises a second spring (202e) and a positioning frame (202f); one end of the second spring (202e) is fixed to one side of the tooth frame (202d), and the other end is fixed to one side of the base (103); the positioning frame (202f) is sleeved on the outside of the tooth frame (202d); and the positioning frame (202f) and the tooth frame (202d) are movably connected.

2. The integrated automobile lifter motor glass clamping device according to claim 1, characterized in that: The pushing member (203) comprises a moving frame (203a) and a pushing block (203b); the moving frame (203a) is fixed to the bottom of the tooth frame (202d); and the pushing block (203b) is arranged below the moving frame (203a).

3. The integrated automobile lifter motor glass clamping device according to claim 2, characterized in that: The pushing member (203) further comprises a pushing frame (203c) and a protective shell (203d), wherein the pushing frame (203c) is fixed to the bottom of the pushing block (203b), and the protective shell (203d) is fixed to one side of the base (103).

4. The integrated automobile lifter motor glass clamping device according to claim 3, characterized in that: The pushing member (203) further comprises a moving rod (203e), a supporting sleeve (203f) and a third spring (203g); the moving rod (203e) is fixed to the bottom of the pushing frame (203c); the supporting sleeve (203f) is sleeved on the outside of the moving rod (203e); the supporting sleeve (203f) and the moving rod (203e) are movably connected; one end of the third spring (203g) is fixed to the bottom of the moving rod (203e), and the other end is fixed to the inner wall of the supporting sleeve (203f).