Buffer structure and using method thereof

Abstract

The invention relates to the technical field of automobile wire harnesses, and discloses a buffer structure and a use method thereof, buffer assemblies are arranged on a first mounting plate and a second mounting plate, and adjusting assemblies are arranged on the outer sides of the first mounting plate and the second mounting plate; when the first electric wire and the second electric wire are pulled by external force, the first fixing shaft and the second fixing shaft drive the two connecting columns to rotate, the two connecting columns drive the torsion spring to rotate, the torsion spring is stressed, and the pulling force borne by the wire harness is buffered; when the first electric wire and the second electric wire are not pulled by external force, the torsional spring drives the two connecting columns to reset, and the two connecting columns drive the first fixing shaft and the second fixing shaft to reset respectively, so that the situation that the first electric wire and the second electric wire are in a loose state and are easy to swing in the use process is avoided; and the first connector and the second connector are easy to loosen from the connecting end for a long time, so that the circuit is disconnected, and the normal use of the wire harness is influenced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile wiring harnesses, in particular to a buffer structure and a use method thereof. Background Art

[0002] The automotive wiring harness is the network body of the automotive circuit and the nervous system of the automotive power and signal transmission distribution. It organically connects the central control components with the automotive control unit, electrical and electronic execution units, and electrical devices to form a complete automotive electrical and electronic control system.

[0003] After the current automotive wiring harness is installed, the wires are usually fixed by bundling. When the wiring harness is pulled by external force, it is easy to cause the connector and the connection end of the wiring harness to separate, causing the line to be disconnected, thereby affecting the normal use of the wiring harness. For this reason, a buffer structure and a method of using the same are proposed. Summary of the invention

[0004] The object of the present invention is to provide a buffer structure and a method of using the same, so as to solve the problem mentioned in the above background technology that after the current automotive wiring harness is installed, the wires are usually fixed by bundling. When the wiring harness is pulled by external force, it is easy to cause the connector and the connection end of the wiring harness to separate, causing the line to be disconnected, thereby affecting the normal use of the wiring harness.

[0005] To achieve the above object, the present invention provides the following technical solution: a buffer structure, comprising a fixed tube, a connecting assembly is provided on the inner side of the fixed tube, a first mounting plate and a second mounting plate are fixedly connected to the two ends of the fixed tube respectively, a buffer assembly is provided on the first mounting plate and the second mounting plate, and an adjustment assembly is provided on the outer sides of the first mounting plate and the second mounting plate;

[0006] The connection assembly includes a fixing frame, a first electric slip ring and a second electric slip ring, the fixing frame is fixedly connected to the inner center of the fixing tube, the first electric slip ring and the second electric slip ring are both fixedly connected to the inner side of the fixing frame, one end of the first electric slip ring is fixedly connected to a first fixing shaft, a first electric wire is wound around the outer side of the first fixing shaft, one end of the first electric wire is connected to a first connector, one side of the second electric slip ring is fixedly connected to a second fixing shaft, a second electric wire is wound around the outer side of the second fixing shaft, and one end of the second electric wire is fixedly connected to a second connector.

[0007] As a further preferred embodiment of the present technical solution: the buffer assembly includes a first bearing, a second bearing and two connecting columns, the outer ring of the first bearing is fixedly connected to the inside of the first mounting plate, the outer ring of the second bearing is fixedly connected to the inside of the second mounting plate, the two connecting columns are respectively fixedly connected to the inner rings of the first bearing and the second bearing, a groove is provided at one end of the two connecting columns, and a torsion spring is movably sleeved on the outer sides of the two connecting columns.

[0008] As a further preferred embodiment of the present technical solution: the adjusting assembly includes two connecting shells, two connecting blocks and two sliding columns, the two connecting shells are respectively fixedly connected to the outer sides of the first mounting plate and the second mounting plate, the two connecting blocks are respectively fixedly connected to one end of the two torsion springs, one end of the two sliding columns are respectively fixedly connected to the outer sides of the two connecting blocks, the other ends of the two sliding columns are respectively movable through the inner sides of the first mounting plate and the second mounting plate, the other ends of the two sliding columns are both fixedly connected to pull blocks, the outer sides of the pull blocks are provided with arc grooves, and the outer sides of the two connecting shells are both provided with through grooves at the centers.

[0009] As a further preferred embodiment of the present technical solution: a terminal of the first electric slip ring is connected to a terminal of the second electric slip ring, another terminal of the first electric slip ring is connected to another end of the first electric wire, and another terminal of the second electric slip ring is connected to another end of the second electric wire.

[0010] As a further preferred embodiment of the technical solution: one end of the two connecting columns respectively extends to the outside of the first bearing and the second bearing, and one end of the two connecting columns is respectively fixedly connected to one end of the first fixed shaft and the second fixed shaft.

[0011] As a further preferred embodiment of the technical solution, one end of the two torsion springs respectively passes through the inside of the two through slots, and the other ends of the two torsion springs are respectively fixedly connected to the inner sides of the two connecting shells.

[0012] As a further preferred embodiment of the technical solution, a first through hole and a second through hole are respectively opened on the outer side of the fixing tube, the first electric wire is movably passed through the inside of the first through hole, and the second electric wire is movably passed through the inside of the second through hole.

[0013] As a further preferred embodiment of the technical solution: the two through grooves are respectively located on the outer sides of the two connecting pillars.

[0014] The present invention also provides a method for using the buffer structure, comprising the following steps:

[0015] S1, connecting, by connecting the first connector and the second connector to the connection end to be connected, that is, completing the installation of the automobile wiring harness;

[0016] S2, buffering, when the first wire and the second wire are pulled by external force, the first wire and the second wire are driven by the force to rotate the first fixed shaft and the second fixed shaft, at this time, the first fixed shaft and the second fixed shaft drive the two connecting pillars to rotate, and the two connecting pillars drive the torsion spring to rotate, so that the torsion spring is stressed, and the pulling force on the wire harness is buffered, when the first wire and the second wire are free from the pulling of the external force, the torsion spring drives the two connecting pillars to reset, and the two connecting pillars respectively drive the first fixed shaft and the second fixed shaft to reset, so that the first wire and the second wire are reset;

[0017] S3. Adjustment. When the length of the wiring harness needs to be adjusted, the pull block is used to pull the sliding column to move, and the sliding column drives the connecting block to move, so that the connecting block pulls one end of the torsion spring out of the inside of the groove, and the length of the first wire can be adjusted. When the adjustment is completed, the position of the groove is observed through the through groove so that the groove is directly below the torsion spring. The pull block is released to move one end of the torsion spring to the inside of the groove, and the position of the connecting column can be fixed.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, when the first wire and the second wire are pulled by an external force, the first wire and the second wire are driven by the force to rotate the first fixed shaft and the second fixed shaft. At this time, the first fixed shaft and the second fixed shaft drive the two connecting columns to rotate, and the two connecting columns drive the torsion spring to rotate, so that the torsion spring is stressed to buffer the pulling force on the wiring harness.

[0020] 2. When the first wire and the second wire are free from the pulling of external force, the torsion spring drives the two connecting columns to reset, and the two connecting columns respectively drive the first fixed shaft and the second fixed shaft to reset, so as to avoid the first wire and the second wire being in a loose state, which is easy to swing during use, and the first connector and the second connector are easy to loosen with the connection end for a long time, resulting in disconnection of the line, thereby affecting the normal use of the wiring harness.

[0021] 3. By pulling a pulling block, the pulling block pulls the sliding column to move, and the sliding column drives the connecting block to move, so that the connecting block pulls one end of the torsion spring out of the inside of the groove. At this time, the first wire can be pulled, and the first wire drives the first fixed shaft to rotate, so that the length of the first wire can be adjusted, which greatly improves the convenience of using the wiring harness and makes the wiring harness more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of the fixed pipe of the present invention;

[0024] Figure 2 For the present invention Figure 1 Schematic diagram of the enlarged structure of the middle A area;

[0025] Figure 3 It is a schematic diagram of the connecting column structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the connection housing structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the sliding column structure of the present invention.

[0028] Explanation of the reference numerals: 1. fixed tube; 21. fixed frame; 22. first electric slip ring; 23. second electric slip ring; 24. first fixed shaft; 25. second fixed shaft; 26. first electric wire; 27. second electric wire; 28. first connector; 29. ​​second connector; 3. first mounting plate; 4. second mounting plate; 51. first bearing; 52. second bearing; 53. connecting column; 54. groove; 55. torsion spring; 61. connecting shell; 62. connecting block; 63. sliding column; 64. pulling block; 65. arc groove; 66. through groove; 7. first through hole; 8. second through hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0031] Example

[0032] In the prior art, after the current automotive wiring harness is installed, the wires are usually fixed by bundling. When the wiring harness is pulled by external force, it is easy to cause the connector and the connection end of the wiring harness to separate, causing the line to be disconnected, thereby affecting the normal use of the wiring harness.

[0033] See also Figure 1-5 The present invention provides a technical solution: a buffer structure, including a fixed tube 1, a connecting assembly is provided on the inner side of the fixed tube 1, a first mounting plate 3 and a second mounting plate 4 are respectively fixedly connected at both ends of the fixed tube 1, a buffer assembly is provided on the first mounting plate 3 and the second mounting plate 4, and an adjustment assembly is provided on the outer side of the first mounting plate 3 and the second mounting plate 4.

[0034] The connecting assembly includes a fixing frame 21, a first electric slip ring 22 and a second electric slip ring 23. The fixing frame 21 is fixedly connected to the inner center of the fixing pipe 1. The first electric slip ring 22 and the second electric slip ring 23 are both fixedly connected to the inner side of the fixing frame 21. One end of the first electric slip ring 22 is fixedly connected to a first fixing shaft 24. A first electric wire 26 is wound around the outer side of the first fixing shaft 24. One end of the first electric slip ring 26 is connected to a first connector 28. One side of the second electric slip ring 23 is fixedly connected to a second fixing shaft 25. A second electric wire 27 is wound around the outer side of the second fixing shaft 25. One end of the second electric slip ring 27 is fixedly connected to a second connector 29. The first electric slip ring 22 and the second electric slip ring 23 are arranged so that the first fixing shaft 24 and the second fixing shaft 25 can rotate.

[0035] By setting a buffer component, the pulling force on the wire harness can be buffered to prevent the wire harness connector from falling off from the connection end; the buffer component includes a first bearing 51, a second bearing 52 and two connecting columns 53, the outer ring of the first bearing 51 is fixedly connected to the inside of the first mounting plate 3, the outer ring of the second bearing 52 is fixedly connected to the inside of the second mounting plate 4, the two connecting columns 53 are fixedly connected to the inner rings of the first bearing 51 and the second bearing 52 respectively, one end of the two connecting columns 53 is provided with a groove 54, the outer sides of the two connecting columns 53 are movably sleeved with a torsion spring 55, and the two connecting One end of the column 53 extends to the outside of the first bearing 51 and the second bearing 52 respectively, and one end of the two connecting columns 53 is fixedly connected to one end of the first fixed shaft 24 and the second fixed shaft 25 respectively; when the first wire 26 and the second wire 27 are pulled by external force, the first wire 26 and the second wire 27 are driven by the force to drive the first fixed shaft 24 and the second fixed shaft 25 to rotate, and at this time, the first fixed shaft 24 and the second fixed shaft 25 drive the two connecting columns 53 to rotate, and the two connecting columns 53 drive the torsion spring 55 to rotate, so that the torsion spring 55 is stressed, so as to buffer the pulling force on the wiring harness;

[0036] When the first wire 26 and the second wire 27 are free from the pulling of external force, the torsion spring 55 drives the two connecting columns 53 to reset, and the two connecting columns 53 respectively drive the first fixed shaft 24 and the second fixed shaft 25 to reset, thereby preventing the first wire 26 and the second wire 27 from being in a relaxed state, which is easy to swing during use, and the first connector 28 and the second connector 29 from loosening with the connection end for a long time, resulting in line disconnection, thereby affecting the normal use of the wiring harness.

[0037] By setting the adjustment component, the length of the first wire 26 can be adjusted, which greatly improves the convenience of using the wiring harness and makes the wiring harness more convenient to use; the adjustment component includes two connecting shells 61, two connecting blocks 62 and two sliding posts 63, the two connecting shells 61 are respectively fixedly connected to the outer sides of the first mounting plate 3 and the second mounting plate 4, the two connecting blocks 62 are respectively fixedly connected to one end of the two torsion springs 55, one end of the two sliding posts 63 is respectively fixedly connected to the outer sides of the two connecting blocks 62, the other ends of the two sliding posts 63 are respectively movably penetrated through the inner sides of the first mounting plate 3 and the second mounting plate 4, and the other ends of the two sliding posts 63 are fixedly connected to the pull blocks 64 , an arc groove 65 is provided on the outer side of the pull block 64, and a through groove 66 is provided at the outer center of the two connecting shells 61. One end of the two torsion springs 55 passes through the inside of the two through grooves 66 respectively, and the other ends of the two torsion springs 55 are fixedly connected to the inner sides of the two connecting shells 61 respectively. The two through grooves 66 are respectively located on the outer sides of the two connecting columns 53; by pulling a pull block 64, the pull block 64 pulls the sliding column 63 to move, and the sliding column 63 drives the connecting block 62 to move, so that the connecting block 62 pulls one end of the torsion spring 55 out of the inside of the groove 54, and at this time, the first wire 26 can be pulled, and the first wire 26 drives the first fixed shaft 24 to rotate, so that the length of the first wire 26 can be adjusted;

[0038] When the adjustment is completed, the position of the groove 54 is observed through the through slot 66 so that the groove 54 is located directly below the torsion spring 55, and the pull block 64 is loosened so that one end of the torsion spring 55 drives the connecting block 62 and the sliding column 63 to move, so that one end of the torsion spring 55 moves to the inside of the groove 54, and the position of the connecting column 53 can be fixed, that is, the fixation of the first fixed shaft 24 is completed, and the operation is simple and quick.

[0039] The connection terminal of the first electric slip ring 22 is connected to the connection terminal of the second electric slip ring 23, the other connection terminal of the first electric slip ring 22 is connected to the other end of the first electric wire 26, and the other connection terminal of the second electric slip ring 23 is connected to the other end of the second electric wire 27. The connection of the wire harness is completed by setting the first electric slip ring 22, the second electric slip ring 23, the first electric wire 26 and the second electric wire 27; the outer side of the fixed tube 1 is respectively provided with a first through hole 7 and a second through hole 8, the first electric wire 26 movably passes through the inside of the first through hole 7, and the second electric wire 27 movably passes through the inside of the second through hole 8.

[0040] Working principle or structural principle, when the wiring harness is used, the first connector 28 and the second connector 29 are connected to the connection end to be connected, and the installation of the automobile wiring harness is completed; when the first wire 26 and the second wire 27 are pulled by external force, the first wire 26 and the second wire 27 are driven by force to drive the first fixed shaft 24 and the second fixed shaft 25 to rotate, and at this time, the first fixed shaft 24 and the second fixed shaft 25 drive the two connecting columns 53 to rotate, and the two connecting columns 53 drive the torsion spring 55 to rotate, so that the torsion spring 55 is stressed, and the pulling force on the wiring harness is reduced. Buffering is performed; when the first wire 26 and the second wire 27 are free from the pulling of external force, the torsion spring 55 drives the two connecting columns 53 to reset, and the two connecting columns 53 respectively drive the first fixed shaft 24 and the second fixed shaft 25 to reset, so that the first wire 26 and the second wire 27 are reset, avoiding the first wire 26 and the second wire 27 from being in a relaxed state, which is easy to swing during use, and the first connector 28 and the second connector 29 are easy to loosen from the connection end for a long time, resulting in line disconnection, thereby affecting the normal use of the wiring harness.

[0041] When the length of the wiring harness needs to be adjusted, a pull block 64 is pulled so that the pull block 64 pulls the sliding column 63 to move, and the sliding column 63 drives the connecting block 62 to move, so that the connecting block 62 pulls one end of the torsion spring 55 out of the interior of the groove 54. At this time, the first wire 26 can be pulled, and the first wire 26 drives the first fixed shaft 24 to rotate, so that the length of the first wire 26 can be adjusted, which greatly improves the convenience of using the wiring harness and makes the wiring harness more convenient to use; when the adjustment is completed, the position of the groove 54 is observed through the through groove 66, so that the groove 54 is located directly below the torsion spring 55, and the pull block 64 is released, so that one end of the torsion spring 55 drives the connecting block 62 and the sliding column 63 to move, so that one end of the torsion spring 55 moves to the interior of the groove 54, so that the position of the connecting column 53 can be fixed, that is, the first fixed shaft 24 is fixed, and the operation is simple and quick.

[0042] The present invention also provides a method for using the buffer structure, comprising the following steps:

[0043] S1, connection, by connecting the first connector 28 and the second connector 29 to the connection end to be connected, the installation of the automobile wiring harness is completed;

[0044] S2, buffering, when the first wire 26 and the second wire 27 are pulled by external force, the first wire 26 and the second wire 27 are driven by force to rotate the first fixed shaft 24 and the second fixed shaft 25, at which time the first fixed shaft 24 and the second fixed shaft 25 drive the two connecting pillars 53 to rotate, and the two connecting pillars 53 drive the torsion spring 55 to rotate, so that the torsion spring 55 is stressed, and the pulling force on the wire harness is buffered. When the first wire 26 and the second wire 27 are free from the pulling of the external force, the torsion spring 55 drives the two connecting pillars 53 to reset, and the two connecting pillars 53 respectively drive the first fixed shaft 24 and the second fixed shaft 25 to reset, so that the first wire 26 and the second wire 27 are reset;

[0045] S3. Adjustment. When the length of the wiring harness needs to be adjusted, the pull block 64 is used to pull the slide post 63 to move, and the slide post 63 drives the connecting block 62 to move, so that the connecting block 62 pulls one end of the torsion spring 55 out of the inside of the groove 54, and the length of the first wire 26 can be adjusted. When the adjustment is completed, the position of the groove 54 is observed through the through groove 66, so that the groove 54 is located directly below the torsion spring 55, and the pull block 64 is released to move one end of the torsion spring 55 to the inside of the groove 54, so that the position of the connecting post 53 can be fixed.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A buffer structure, comprising a fixed tube (1), characterized in that: A connecting assembly is provided on the inner side of the fixed tube (1), a first mounting plate (3) and a second mounting plate (4) are respectively fixedly connected at both ends of the fixed tube (1), a buffer assembly is provided on the first mounting plate (3) and the second mounting plate (4), and an adjustment assembly is provided on the outer sides of the first mounting plate (3) and the second mounting plate (4); The connection assembly comprises a fixing frame (21), a first electric slip ring (22) and a second electric slip ring (23); the fixing frame (21) is fixedly connected to the inner center of the fixing tube (1); the first electric slip ring (22) and the second electric slip ring (23) are both fixedly connected to the inner side of the fixing frame (21); one end of the first electric slip ring (22) is fixedly connected to a first fixing shaft (24); a first electric wire (26) is wound around the outer side of the first fixing shaft (24); one end of the first electric wire (26) is connected to a first connector (28); one side of the second electric slip ring (23) is fixedly connected to a second fixing shaft (25); a second electric wire (27) is wound around the outer side of the second fixing shaft (25); one end of the second electric wire (27) is fixedly connected to a second connector (29).

2. A buffer structure according to claim 1, characterized in that: The buffer assembly comprises a first bearing (51), a second bearing (52) and two connecting columns (53), wherein the outer ring of the first bearing (51) is fixedly connected to the inside of the first mounting plate (3), the outer ring of the second bearing (52) is fixedly connected to the inside of the second mounting plate (4), the two connecting columns (53) are respectively fixedly connected to the inner rings of the first bearing (51) and the second bearing (52), a groove (54) is formed at one end of the two connecting columns (53), and a torsion spring (55) is movably sleeved on the outer sides of the two connecting columns (53).

3. A buffer structure according to claim 2, characterized in that: The adjustment assembly comprises two connecting shells (61), two connecting blocks (62) and two sliding columns (63). The two connecting shells (61) are respectively fixedly connected to the outer sides of the first mounting plate (3) and the second mounting plate (4). The two connecting blocks (62) are respectively fixedly connected to one end of the two torsion springs (55). One end of the two sliding columns (63) is respectively fixedly connected to the outer sides of the two connecting blocks (62). The other ends of the two sliding columns (63) are respectively movably penetrated through the inner sides of the first mounting plate (3) and the second mounting plate (4). The other ends of the two sliding columns (63) are both fixedly connected to a pulling block (64). An arc groove (65) is provided on the outer side of the pulling block (64). A through groove (66) is provided at the center of the outer sides of the two connecting shells (61).

4. A buffer structure according to claim 1, characterized in that: A connection terminal of the first electric slip ring (22) is connected to a connection terminal of the second electric slip ring (23), another connection terminal of the first electric slip ring (22) is connected to another end of a first electric wire (26), and another connection terminal of the second electric slip ring (23) is connected to another end of a second electric wire (27).

5. A buffer structure according to claim 2, characterized in that: One end of the two connecting columns (53) extends to the outside of the first bearing (51) and the second bearing (52), respectively, and one end of the two connecting columns (53) is fixedly connected to one end of the first fixed shaft (24) and the second fixed shaft (25), respectively.

6. A buffer structure according to claim 3, characterized in that: One end of the two torsion springs (55) passes through the interior of the two through slots (66), respectively, and the other end of the two torsion springs (55) is fixedly connected to the inner side of the two connection shells (61), respectively.

7. A buffer structure according to claim 1, characterized in that: The outer side of the fixed tube (1) is respectively provided with a first through hole (7) and a second through hole (8); the first electric wire (26) is movably inserted into the first through hole (7); and the second electric wire (27) is movably inserted into the second through hole (8).

8. A buffer structure according to claim 3, characterized in that: The two through grooves (66) are respectively located on the outer sides of the two connecting pillars (53).

9. A method for using the buffer structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, connecting, by connecting the first connector (28) and the second connector (29) to the connection end to be connected, thus completing the installation of the automobile wiring harness; S2, buffering, when the first wire (26) and the second wire (27) are pulled by external force, the first wire (26) and the second wire (27) are driven by the force to rotate the first fixed shaft (24) and the second fixed shaft (25), at which time the first fixed shaft (24) and the second fixed shaft (25) drive the two connecting pillars (53) to rotate, and the two connecting pillars (53) drive the torsion spring (55) to rotate, so that the torsion spring (55) is stressed, and the pulling force on the wire harness is buffered. When the first wire (26) and the second wire (27) are free from the pulling of the external force, the torsion spring (55) drives the two connecting pillars (53) to reset, and the two connecting pillars (53) respectively drive the first fixed shaft (24) and the second fixed shaft (25) to reset, so that the first wire (26) and the second wire (27) are reset; S3, adjustment, when it is necessary to adjust the length of the wiring harness, the pull block (64) is used to pull the slide post (63) to move, and the slide post (63) drives the connection block (62) to move, so that the connection block (62) pulls one end of the torsion spring (55) out of the groove (54), and the length of the first wire (26) can be adjusted. When the adjustment is completed, the position of the groove (54) is observed through the through groove (66), so that the groove (54) is located directly below the torsion spring (55), and the pull block (64) is released, so that one end of the torsion spring (55) moves to the inside of the groove (54), and the position of the connection post (53) can be fixed.

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