CN112932113A

CN112932113A - Office table and chair with heat preservation function

Info

Publication number: CN112932113A
Application number: CN202110098544.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Cen Tuxiu
Current assignee: Cen Tuxiu
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-06-11

Abstract

The invention discloses an office table and chair with a heat preservation function, and an office table component, wherein the office table component consists of a table top component, a side plate, a storage component and a back plate, the side plate is fixedly connected to one side of the bottom of the table top component, the storage component is fixedly connected to the other side of the bottom of the table top component, the back plate is fixedly installed at the bottom of the table top component, the back plate is arranged on the back surfaces of the side plate and the storage component, and a leg heat preservation mechanism consists of two installation sliding rods, two installation sliding blocks, a hot air blower body, a limiting component and two installation components. According to the office table, the legs and the hands of office workers can be heated and insulated simultaneously, so that the office table is kept at a temperature suitable for office work all the time, normal office work of the workers is guaranteed, the adjustable notebook computer placing frame is arranged on the office table, great convenience is provided for the workers, and the practicability is good.

Description

Office table and chair with heat preservation function

Technical Field

The invention relates to the technical field of office desks and chairs, in particular to an office desk and chair with a heat preservation function.

Background

The office table and chair refers to a table and a chair used for office. Office desks and chairs can be divided into plate type office desks and chairs, rigid office desks and chairs, metal office desks and chairs, soft office desks and chairs and the like from materials; the office, the open-type office of staff, the conference room, the reading room, the book and data room, the training classroom, the laboratory and the dormitory of workers are classified from the use occasions; the main points of the use function are: desks, office chairs, sofas, filing cabinets, book cabinets, and the like.

Along with the requirement of consumers on products is higher and higher, the products with single functions do not meet the requirements of consumers, the functions are diversified to be consumption trends, in winter, most people usually work on office desks in offices, but heating systems in most areas are incomplete, the air conditioner cost is correspondingly higher, and office desks and chairs in the prior art do not have the functions of heating and heat preservation generally, so that the fingers of staff are easy to be stiff and the blood circulation is slow under the condition, the gloves are inconvenient to move, the users cannot work conveniently when wearing the gloves, and the office efficiency is greatly reduced.

Disclosure of Invention

The technical task of the invention is to provide an office table and chair with a heat preservation function, which can simultaneously heat and preserve the heat of the legs and the hands of office workers, so as to keep the office table at a temperature suitable for office work all the time, thereby ensuring the normal office work of the workers, and the office table is provided with an adjustable notebook placing frame, thereby providing great convenience for the workers and having good practicability, so as to solve the problems.

The technical scheme of the invention is realized as follows:

an office table and chair with a heat preservation function, comprising:

the office table component comprises a table top component, a side plate, a storage component and a back plate, wherein the side plate is fixedly connected to one side of the bottom of the table top component, the storage component is fixedly connected to the other side of the bottom of the table top component, the back plate is fixedly arranged at the bottom of the table top component, and the back plate is arranged on the back surfaces of the side plate and the storage component;

the leg heat-insulation mechanism consists of two mounting slide bars, two mounting slide blocks, an air heater body, a limiting assembly and two mounting assemblies, wherein the two mounting slide blocks are connected to the two mounting slide bars in a sliding manner;

the hand heat preservation mechanism consists of an installation buckle plate, an electric heater, a heating plate and a heat conduction plate, the installation buckle plate is buckled on the desktop assembly, the electric heater is fixedly installed at the bottom of the installation buckle plate, installation grooves which are arranged at equal intervals are formed in the top of the installation buckle plate, the heating plate is fixedly installed inside the installation groove above the installation buckle plate, the heating plate is electrically connected with the electric heater through a connecting wire, and the heat conduction plate is buckled above the installation buckle plate;

adjustment mechanism, adjustment mechanism passes through two fixed ears, fixed rotating shaft, two connection commentaries on classics pieces, places board, two extension rods, connects pivot, two support kellies and the spacing draw-in groove of a plurality of and constitutes, two the equal fixed mounting of fixed ear is in the top of desktop subassembly, fixed rotating shaft rotates to be installed two between the fixed ear, two connect commentaries on classics piece symmetry and rotate to be connected in the fixed rotating shaft, it is close to place the board connect one side and two of commentaries on classics piece fixed connection, place the board and set up to the L type, two the extension rod is close to two one side and two of fixed ear fixed connection, it rotates to be connected in two to connect the pivot between the extension rod, two support kellies symmetry and install connect the pivot and be close to place one side of board, a plurality of spacing draw-in groove symmetry is seted up place the back of board and correspond the position of support kellies And one side of the support clamping rod, which is close to the limit clamping groove, penetrates through the limit clamping groove corresponding to the support clamping rod and extends to the inside of the limit clamping groove.

Preferably, the desktop assembly comprises a desktop body, a placing buckle groove and a limiting clamp hole, wherein the placing buckle groove is formed in the upper portion of the desktop body and corresponds to the hand heat preservation mechanism.

Preferably, the limiting clamping hole is formed below the desktop body and corresponds to the position of the limiting component.

Preferably, the storage assembly comprises a cabinet body and a storage groove, the cabinet body is provided with symmetrically arranged drawers, and the bottom of the cabinet body is provided with supporting legs.

Preferably, the accommodating groove is formed in the side surface of the cabinet body and corresponds to the position of the air heater body.

Preferably, the limiting assembly comprises a limiting clamping rod and a limiting spring, a first sliding plate and a second sliding plate are arranged on the limiting clamping rod in a sliding mode, a limiting clamping block is installed on the upper portion of the limiting clamping rod, and the limiting spring is sleeved on the limiting clamping rod between the first sliding plate and the limiting clamping block.

Preferably, the bottom of the limiting clamping rod is provided with an operating handle matched with the limiting clamping rod.

Preferably, the mounting assembly comprises a mounting seat and two mounting lugs, one side of the mounting seat, which is close to the mounting sliding rod, is fixedly connected with the mounting seat, and the two mounting lugs are respectively mounted on two sides of the mounting seat.

Preferably, the mounting lug is provided with a mounting screw matched with the mounting lug.

Preferably, a rubber protective pad is arranged on one side of the placing plate close to the fixed rotating shaft.

Compared with the prior art, the invention has the advantages and positive effects that:

1. according to the office table, the arranged office table component is composed of the table top component, the side plates, the storage component and the back plate, the table top component is used for installing the hand heat preservation mechanism and the adjusting mechanism, and the storage component can increase the storage space of the office table, so that office workers can use the office table conveniently;

2. according to the invention, the arranged leg heat-preservation mechanism is composed of the two mounting slide rods, the two mounting slide blocks, the air heater body, the limiting component and the two mounting components, when in use, the device can be moved to the legs of a user, so that the heating and heat-preservation effects can be provided for the legs of the user, the comfort of the user is further increased, and when not in use, the air heater body can be accommodated, so that the occupation of space is avoided, and convenience is provided for the user;

3. according to the invention, the hand heat-preservation mechanism is composed of the mounting buckle plate, the electric heater, the heating sheet and the heat-conducting plate, and the temperature is transmitted to the heat-conducting plate through the heating sheet, so that heat is provided for the hand of a user, the heat preservation of the hand of the user is further ensured, the blood circulation of the user is increased, and the office efficiency is improved;

4. according to the notebook computer adjusting device, the adjusting mechanism is composed of the two fixing lugs, the fixing rotating shaft, the two connecting rotating blocks, the placing plate, the two extending rods, the connecting rotating shaft, the two supporting clamping rods and the plurality of limiting clamping grooves, so that a notebook computer of a worker can be placed, the angle of the placed notebook computer can be adjusted according to the requirements of a user, the use of the worker is greatly facilitated, and the practicability of the notebook computer adjusting device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an office table and chair with a heat preservation function according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of another view angle of an office table and chair with a heat preservation function according to an embodiment of the invention;

FIG. 3 is a schematic structural diagram of a desk assembly according to an embodiment of the invention;

FIG. 4 is a schematic diagram of a desktop assembly according to an embodiment of the present invention;

FIG. 5 is a block diagram illustrating another perspective of a desktop assembly according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a storage assembly according to an embodiment of the present invention;

FIG. 7 is a schematic structural view from another perspective of a storage assembly according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a leg warming mechanism according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a spacing assembly according to an embodiment of the invention;

FIG. 10 is an enlarged view of a portion of FIG. 8 at A-A, in accordance with embodiments of the present invention;

FIG. 11 is a schematic structural view of a hand warming mechanism according to an embodiment of the present invention;

FIG. 12 is a cross-sectional view of the structure of a hand warming mechanism according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of an adjustment mechanism according to an embodiment of the present invention;

fig. 14 is a schematic view of another perspective of an adjustment mechanism according to an embodiment of the invention.

In the figure:

1. a desk component; 101. a desktop component; 1011. a desktop body; 1012. placing a fastening groove; 1013. limiting clamp holes; 102. a side plate; 103. a storage assembly; 1031. a cabinet body; 1032. a drawer; 1033. Supporting legs; 1034. a receiving groove; 104. a back plate;

2. a leg heat-preserving mechanism; 201. installing a sliding rod; 202. installing a sliding block; 203. a hot air blower body; 204. A limiting component; 2041. a limiting clamping rod; 2042. a first slide plate; 2043. a second slide plate; 2044. a limiting clamping block; 2045. a limiting spring; 205. mounting the component; 2051. a mounting seat; 2052. mounting lugs; 2053. mounting screws;

3. a hand warming mechanism; 301. mounting a buckle plate; 302. an electric heater; 303. a heating plate; 304. a heat conducting plate;

4. an adjustment mechanism; 401. fixing the ear; 402. fixing the rotating shaft; 403. connecting the rotary block; 404. placing the plate; 405. an extension rod; 406. connecting the rotating shaft; 407. supporting the clamping rod; 408. a limiting clamping groove;

5. a rubber protective pad.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

The invention is further described with reference to the following figures and specific examples.

Example 1

As shown in fig. 1-2, an office table and chair with a heat preservation function according to an embodiment of the present invention includes a table component 1, a leg heat preservation mechanism 2, a hand heat preservation mechanism 3, and an adjusting mechanism 4;

as shown in fig. 1-3, the office table assembly 1 is composed of a table top assembly 101, a side plate 102, a storage assembly 103, and a back plate 104, wherein the side plate 102 is fixedly connected to one side of the bottom of the table top assembly 101, the storage assembly 103 is fixedly connected to the other side of the bottom of the table top assembly 101, the back plate 104 is fixedly installed at the bottom of the table top assembly 101, and the back plate 104 is disposed at the back of the side plate 102 and the storage assembly 103;

as shown in fig. 1-2 and 8-10, the leg heat-insulating mechanism 2 is composed of two mounting sliding rods 201, two mounting sliding blocks 202, an air heater body 203, a limiting component 204 and two mounting components 205, wherein the two mounting sliding blocks 202 are both slidably connected to the two mounting sliding rods 201, the upper part of the air heater body 203 is fixedly mounted at the bottoms of the two mounting sliding blocks 202, the air heater body 203 is slidably connected with the mounting sliding rods 201 through the two mounting sliding blocks 202, the limiting component 204 is fixedly mounted on the side surface of the air heater body 203 and staggers the positions of the two mounting sliding rods 201, and the two mounting components 205 are respectively and fixedly mounted at the two ends of the two mounting sliding rods 201;

as shown in fig. 1-2 and 11-12, the hand heat preservation mechanism 3 is composed of an installation buckle plate 301, an electric heater 302, a heating plate 303 and a heat conduction plate 304, the installation buckle plate 301 is buckled on the desktop assembly 101, the electric heater 302 is fixedly installed at the bottom of the installation buckle plate 301, installation grooves arranged at equal intervals are formed in the top of the installation buckle plate 301, the heating plate 303 is fixedly installed in the installation groove above the installation buckle plate 301, the heating plate 303 is electrically connected with the electric heater 302 through a connecting wire, and the heat conduction plate 304 is buckled above the installation buckle plate 301;

as shown in fig. 1-2 and 13-14, the adjusting mechanism 4 includes two fixing lugs 401, a fixing rotating shaft 402, two connecting rotating blocks 403, a placing plate 404, two extending rods 405, a connecting rotating shaft 406, two supporting clamping rods 407, and a plurality of limiting clamping slots 408, wherein the two fixing lugs 401 are both fixedly mounted above the table component 101, the fixing rotating shaft 402 is rotatably mounted between the two fixing lugs 401, the two connecting rotating blocks 403 are symmetrically and rotatably connected to the fixing rotating shaft 402, one side of the placing plate 404 close to the connecting rotating block 403 is fixedly connected to the two connecting rotating blocks 403, the placing plate 404 is L-shaped, one side of the two extending rods 405 close to the two fixing lugs 401 is fixedly connected to the two fixing lugs 401, and the connecting rotating shaft 406 is rotatably connected between the two extending rods 405, the two supporting clamping rods 407 are symmetrically installed on the connecting rotating shaft 406 and close to one side of the placing plate 404, the plurality of limiting clamping grooves 408 are symmetrically formed in the back face of the placing plate 404 and correspond to the positions of the supporting clamping rods 407, and one side of each supporting clamping rod 407, which is close to the corresponding limiting clamping groove 408, penetrates through the limiting clamping groove 408 corresponding to the supporting clamping rod 407 and extends to the inside of the limiting clamping groove 408.

By adopting the technical scheme, the desktop component 101 is used for installing the hand heat-insulating mechanism 3 and the adjusting mechanism 4, the storage component 103 can increase the storage space of the office desk, so that the office workers can use the office desk conveniently, the leg heat-insulating mechanism 2 can provide heating and heat-insulating functions for the legs of the user, the comfort of the user is further improved, the hot air blower body 203 can be accommodated when the desk is not used, so that the space occupation is avoided, the convenience is provided for the user, the hand heat-insulating mechanism 3 transmits the temperature to the heat-conducting plate 304 through the heating sheet 303, heat is provided for the hands of the user, the heat insulation of the hands of the user is further ensured, the blood circulation of the user is increased, the office efficiency is improved, the notebook of the workers can be placed through the adjusting mechanism 4, and the angle of the placed notebook can be adjusted according to the requirements of the user, thereby greatly facilitating the use of workers and improving the practicability of the device.

Example 2

As shown in fig. 4 to 5 and fig. 11 to 12, the present embodiment is different from embodiment 1 in that the desktop assembly 101 includes a desktop body 1011 and a placement buckle slot 1012, and the placement buckle slot 1012 is opened at an upper portion of the desktop body 1011 and corresponds to the position of the hand warming mechanism 3.

Through adopting above-mentioned technical scheme, the setting of placing catching groove 1012 is used for placing hand heat preservation mechanism 3 to conveniently install hand heat preservation mechanism 3 on desktop body 1011.

Example 3

As shown in fig. 4-5 and fig. 9, the present embodiment is different from embodiment 2 in that the position-limiting locking hole 1013 is formed below the desktop body 1011 and corresponds to the position of the position-limiting component 204.

Through adopting above-mentioned technical scheme, the setting in spacing calorie of hole 1013 is used for the spacing fixture block 2044 of joint to can carry out spacing fixed to shank heat preservation mechanism 2 through spacing subassembly 204.

Example 4

As shown in fig. 1 to 3 and fig. 6 to 7, the present embodiment is different from embodiment 3 in that the storage assembly 103 includes a cabinet 1031 and a receiving groove 1034, the cabinet 1031 is provided with symmetrically arranged drawers 1032, the bottom of the cabinet 1031 is mounted with support legs 1033, and the receiving groove 1034 is opened at a side of the cabinet 1031 and corresponds to the position of the hot air blower body 203.

Through adopting above-mentioned technical scheme, can accomodate air heater body 203 through accomodating groove 1034 when not needing the heating, can enough play certain guard action to air heater body 203, reduced the occupation in space again, consequently greatly increased this device's practicality.

Example 5

As shown in fig. 8 to 9, the difference between the present embodiment and the embodiment 5 lies in that the limiting assembly 204 includes a limiting rod 2041 and a limiting spring 2045, the limiting rod 2041 is slidably provided with a first sliding plate 2042 and a second sliding plate 2043, the upper portion of the limiting rod 2041 is provided with a limiting block 2044, and the limiting spring 2045 is sleeved on the limiting rod 2041 between the first sliding plate 2042 and the limiting block 2044.

Through adopting above-mentioned technical scheme, be convenient for carry on spacing fixedly to shank heat preservation mechanism 2 to when guaranteeing shank heat preservation mechanism 2 to use with accomodate stability.

Example 6

As shown in fig. 5 to 7, the present embodiment is different from embodiment 6 in that an operating handle adapted to the bottom of the position-limiting clamping rod 2041 is installed at the bottom thereof.

By adopting the above technical scheme, the limiting clamping rod 2041 in the embodiment 5 is conveniently pulled, thereby providing convenience for the user.

Example 7

As shown in fig. 5 to 7, the present embodiment is different from embodiment 6 in that the mounting assembly 205 includes a mounting seat 2051 and two mounting lugs 2052, one side of the mounting seat 2051 close to the mounting sliding rod 201 is fixedly connected to the mounting seat 2051, and the two mounting lugs 2052 are respectively mounted on two sides of the mounting seat 2051.

Through adopting above-mentioned technical scheme, conveniently install shank heat preservation mechanism 2.

Example 8

As shown in fig. 5 to 7, the present embodiment is different from embodiment 6 in that a mounting screw 2053 is provided on the mounting ear 2052 to be fitted thereto.

By adopting the above technical scheme, the mounting lugs 2052 in embodiment 7 are conveniently fixed.

Example 9

As shown in fig. 5 to 7, the present embodiment is different from embodiment 6 in that a rubber protection pad 5 is installed on one side of the placing plate 404 close to the fixed rotating shaft 402.

By adopting the technical scheme, the protection to the notebook of the user is increased, and the damage caused by friction between the notebook of the user and the board when the notebook is placed on the placing board 404 is avoided.

For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.

In practical application, the leg heat preservation mechanism 2 can heat and preserve the heat of the leg of the user, so that the comfort of the leg of the user is ensured, the leg heat preservation mechanism 2 can be clamped and fixed through the arrangement of the limiting component 204, so that the use stability of the leg heat preservation mechanism 2 is improved, when heat preservation is not needed, only the limiting clamping rod 2041 needs to be pulled to be separated from the limiting clamping hole 1013 on the left side, then the air heater body 203 slides on the installation sliding rod 201 through the installation sliding block 202 and slides into the accommodating groove 1034, and then the limiting clamping block 2044 on the limiting clamping rod 2041 is clamped into the limiting clamping hole 1013 on the right side, so that the air heater body 203 is accommodated, the hand heat preservation mechanism 3 can heat and preserve the heat of the part above the desktop body 1011, so that the blood circulation of the user at night is ensured, and a good premise is provided for the work of a worker, and the adjustment mechanism 4 capable of adjusting the angle is arranged, so that the notebook placed on the placing plate 404 can be adjusted in angle according to the requirement, and the practicability of the product is improved.

The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.

Claims

1. An office table and chair with heat preservation function, its characterized in that includes: the office table component (1) is composed of a table top component (101), side plates (102), a storage component (103) and a back plate (104).

2. The office table and chair with the heat preservation function as claimed in claim 1, wherein the side plate (102) is fixedly connected to one side of the bottom of the desktop assembly (101), the storage assembly (103) is fixedly connected to the other side of the bottom of the desktop assembly (101), the back plate (104) is fixedly installed at the bottom of the desktop assembly (101), and the back plate (104) is arranged at the back of the side plate (102) and the storage assembly (103);

the leg heat-preservation device comprises a leg heat-preservation mechanism (2), wherein the leg heat-preservation mechanism (2) consists of two mounting sliding rods (201), two mounting sliding blocks (202), an air heater body (203), a limiting component (204) and two mounting components (205), the two mounting sliding blocks (202) are both connected to the two mounting sliding rods (201) in a sliding manner, the upper part of the hot air blower body (203) is fixedly arranged at the bottom parts of the two mounting sliding blocks (202), the hot air blower body (203) is connected with the mounting sliding rod (201) in a sliding way through the two mounting sliding blocks (202), the limiting assembly (204) is fixedly mounted on the side surface of the air heater body (203) and staggered with the positions of the two mounting sliding rods (201), and the two mounting assemblies (205) are respectively and fixedly mounted at two ends of the two mounting sliding rods (201);

the heat preservation device comprises a hand heat preservation mechanism (3), wherein the hand heat preservation mechanism (3) is composed of an installation buckle plate (301), an electric heater (302), a heating plate (303) and a heat conduction plate (304), the installation buckle plate (301) is buckled on the desktop assembly (101), the electric heater (302) is fixedly installed at the bottom of the installation buckle plate (301), the top of the installation buckle plate (301) is provided with installation grooves which are arranged at equal intervals, the heating plate (303) is fixedly installed inside the installation grooves above the installation buckle plate (301), the heating plate (303) is electrically connected with the electric heater (302) through a connecting wire, and the heat conduction plate (304) is buckled above the installation buckle plate (301);

the adjusting mechanism (4) is composed of two fixing lugs (401), a fixing rotating shaft (402), two connecting rotating blocks (403), a placing plate (404), two extending rods (405), a connecting rotating shaft (406), two supporting clamping rods (407) and a plurality of limiting clamping grooves (408), wherein the two fixing lugs (401) are fixedly arranged above the desktop component (101), the fixing rotating shaft (402) is rotatably arranged between the two fixing lugs (401), the two connecting rotating blocks (403) are symmetrically and rotatably connected onto the fixing rotating shaft (402), one side, close to the connecting rotating block (403), of the placing plate (404) is fixedly connected with the two connecting rotating blocks (403), the placing plate (404) is set to be L-shaped, and one side, close to the two fixing lugs (401), of the two extending rods (405) is fixedly connected with the two fixing lugs (401), the connecting rotating shaft (406) is rotatably connected between the two extending rods (405), the two supporting clamping rods (407) are symmetrically installed on the connecting rotating shaft (406) and close to one side of the placing plate (404), the plurality of limiting clamping grooves (408) are symmetrically formed in the back of the placing plate (404) and correspond to the positions of the supporting clamping rods (407), and one side, close to the limiting clamping grooves (408), of each supporting clamping rod (407) penetrates through the limiting clamping groove (408) corresponding to the corresponding supporting clamping rod (407) and extends into the limiting clamping groove (408); desktop subassembly (101) include desktop body (1011), place catching groove (1012) and spacing card hole (1013), place catching groove (1012) and set up in the upper portion of desktop body (1011) and the position that corresponds hand heat preservation mechanism (3).

3. The office table and chair with the function of heat preservation as claimed in claim 2, wherein the limiting card hole (1013) is formed below the table top body (1011) and corresponds to the position of the limiting component (204).

4. The office table and chair with the heat preservation function according to claim 2, wherein the storage assembly (103) comprises a cabinet body (1031) and a storage groove (1034), symmetrically arranged drawers (1032) are arranged on the cabinet body (1031), and support legs (1033) are mounted at the bottom of the cabinet body (1031).

5. The office table and chair with the function of keeping warm according to claim 4, wherein the receiving groove (1034) is opened at a side of the cabinet body (1031) corresponding to the position of the air heater body (203).

6. The office table and chair with the heat preservation function according to claim 2, wherein the limiting component (204) comprises a limiting clamping rod (2041) and a limiting spring (2045), the limiting clamping rod (2041) is provided with a first sliding plate (2042) and a second sliding plate (2043) in a sliding manner, a limiting clamping block (2044) is installed on the upper portion of the limiting clamping rod (2041), and the limiting spring (2045) is sleeved on the limiting clamping rod (2041) between the first sliding plate (2042) and the limiting clamping block (2044).