CN221082938U - Connection structure of watchband and dial plate - Google Patents

Abstract

The utility model discloses a connecting structure of a watchband and a dial, which relates to the technical field of connecting structures of watchbands and dials, and comprises the following components: fixed mounting still includes at the fixed disk of dial plate lateral wall: the fixed block is fixedly arranged on the outer side wall of one end of the watchband, and the two side walls of one end of the fixed block are movably inserted with first inserting connection rods. According to the utility model, the two groups of limiting clamping plates are pinched to enable the limiting plates to move in opposite directions at the tops of the limiting blocks, so that the two groups of first inserting rods are contracted into the mounting groove, at the moment, the reset spring fixed at one end of each first inserting rod is synchronously compressed, then the whole limiting clamping plates are placed at the first inserting holes of the fixing rods, the limiting clamping plates are loosened to enable the first inserting rods to be clamped in the inner cavities of the first inserting holes, the fixing plates are pinched to enable the fixing plates to be clamped at one ends of the first inserting rods in a rotating mode, the limiting parts are movably clamped at one ends of the threaded parts, and the first inserting rods can be limited and fixed in the first inserting holes, so that the dial plate and the watchband are tightly fixed.

Description

Connection structure of watchband and dial plate

Technical Field

The utility model relates to the technical field of connection structures of watchbands and dials, in particular to a connection structure of a watchband and a dial.

Background

In daily life, a watch is one of the indispensable tools for people to watch time, people can easily know the current time through a pointer on a dial plate and scales on the dial plate, and most of the existing watches are fixed on the wrist of people through watchbands.

The Chinese patent with the publication number of CN213405106U discloses a connection structure of a dial plate and a watchband for an intelligent bracelet, which comprises the watchband and the dial plate, wherein the dial plate is fixedly connected with the watchband through a fixed seat, and two ends, away from the watchband, of the watchband are respectively connected with two sides of the fixed seat through lug rotation. According to the utility model, the dial plate is fixedly connected with the watchband through the fixing seat, the dial plate is fixed through the clamping block and the clamping block, the clamping block is pressed during disassembly, the dial plate is pushed out through the push plate which is elastically connected with the bottom of the fixing seat through the spring after the clamping block is contracted into the fixing seat through the torsion spring rotating shaft, the fixing seat is simple and quick, the fixing degree between the dial plate and the watchband is ensured, and the dial plate is prevented from loosening.

With respect to the related art in the above, the inventors consider that there are the following drawbacks: the existing connection mode of the watch dial and the watch strap mainly adopts the lug-producing rod, although the lug-producing rod is firmly connected together, professional tools are needed during separation because the lug-producing rod is smaller, and the lug-producing rod is often damaged because of misoperation such as excessive strength, so that a connection structure of the watch strap and the watch dial is provided to solve the problems.

Disclosure of utility model

The utility model provides a connecting structure of a watchband and a watch dial, which has the advantage of being capable of tightly fixing the watch dial and the watchband, so as to solve the problem that the existing connecting mode of the watch dial and the watchband mainly adopts a lug-producing rod, and the lug-producing rod is damaged due to misoperation such as overlarge strength and the like because the lug-producing rod is small and needs special tools when being separated although the lug-producing rod is firmly connected together.

In order to achieve the purpose of tightly fixing the dial plate and the watchband, the utility model provides the following technical scheme: a connection structure of a wristband and a dial, comprising: fixed mounting still includes at the fixed disk of dial plate lateral wall: the fixed block is fixedly arranged on the outer side wall of one end of the watchband, first inserting connection rods are movably inserted into two side walls of one end of the fixed block, one end of each first inserting connection rod is fixedly connected with a reset spring through a fixing protrusion, one end of each reset spring is fixedly connected to the inner cavity of the fixed block, and the fixed block is assembled to shrink the first inserting connection rods and the reset springs to the inner cavity of the fixed block when the dial plate is connected with the watchband, and is loosened when the dial plate is placed at one end of the fixed disc, so that the dial plate and the watchband are connected into a whole; the second inserting connection rods are arranged on the side walls of the two ends of the fixed disc and located at the positions of the first inserting connection rods, and the second inserting connection rods are used for limiting and fixing the first inserting connection rods clamped in the inner cavity of one end of the fixed disc.

As a preferable technical scheme of the utility model, the fixed disk comprises a fixed ring fixedly arranged on the outer side wall of the dial, the outer side wall of the fixed ring is symmetrically provided with fixed rods, and the fixed ring and the fixed rods are integrally formed.

As a preferable technical scheme of the utility model, the fixing block comprises a fixing clamping block fixedly arranged on the outer side wall of one end of the watchband, a flexible belt is fixedly arranged on one side wall of the fixing clamping block, and a limiting block is fixedly arranged on one side wall of the flexible belt.

As a preferable technical scheme of the utility model, a first inserting hole for inserting the first inserting rod is formed in the side wall of one end of the fixed rod, a second inserting hole for inserting the first inserting rod is formed in the two side walls of one end of the limiting block, and a mounting groove for placing the reset spring is formed in one end of the limiting block and located in the second inserting hole.

As a preferable technical scheme of the utility model, a second limiting chute is formed at one end of the limiting block and positioned at the second plugging hole, a limiting slide block is movably arranged in an inner cavity of the second limiting chute, and one side wall of the limiting slide block is fixedly connected with the outer side wall of the first plugging rod.

As a preferable technical scheme of the utility model, a sliding groove is formed at the top of one end of the limiting block and is positioned right above the second inserting hole, a limiting clamping plate is fixedly arranged on the outer side wall of the first inserting rod, and the whole shape of the limiting clamping plate is T-shaped.

As a preferable technical scheme of the utility model, one end of the first plug-in rod is provided with a threaded groove, the second plug-in rod comprises a threaded part for being plugged into the threaded groove, and the outer side wall of one end of the threaded part is movably clamped with a limiting part.

As a preferable technical scheme of the utility model, the whole limiting part is circular disc-shaped, the inside of the limiting part is in a hollow state, and the diameter of the limiting part is larger than that of the first inserting hole.

As a preferable technical scheme of the utility model, a first limiting chute is formed at one end of the fixed rod and at two sides of the first inserting hole, and an L-shaped limiting inserting rod for inserting the first limiting chute is fixedly arranged at one side wall of the limiting part, which is close to the threaded part.

As a preferable technical scheme of the utility model, a fixing plate perpendicular to the side wall of the threaded part, which is close to the limiting part, is fixedly arranged on the side wall of the threaded part, and the fixing plate is used for facilitating a user to rotate the second inserting and connecting rod.

Compared with the prior art, the utility model provides a connecting structure of a watchband and a dial, which has the following beneficial effects:

1. This connection structure of watchband and dial plate makes it remove in opposite directions at the stopper top through holding between the fingers the spacing cardboard of two sets of first peg graft pole lateral walls for two sets of first peg graft poles shrink to the mounting groove in, and the fixed reset spring of first peg graft pole one end is compressed in step this moment, then places its whole first spliced pole department at the dead lever, loosens spacing cardboard, make first peg graft pole joint at the inner chamber of first spliced pole, hold between the fingers the dead plate, make it rotate the joint at the one end of first peg graft pole, the one end activity joint of screw portion has spacing portion, can be with first peg graft pole spacing fixed in first spliced pole in order to realize closely fixed between dial plate and the watchband.

2. The watchband and dial plate connecting structure is matched with the second limiting sliding groove which is formed at one end of the limiting block and located at the position of the second inserting hole, and the limiting sliding block which is fixedly connected with the outer side wall of the first inserting rod in a clamping manner, so that the first inserting rod can be further prevented from sliding out of the inner cavity of the second inserting hole.

3. This connection structure of watchband and dial plate has seted up first spacing spout through dead lever one end and be located first spliced eye both sides, and spacing portion is close to the spacing inserted bar of screw thread portion lateral wall welding has L type, through joint cooperation between the two to can prevent that the second inserted bar from sliding out from the dead lever.

Drawings

FIG. 1 is a schematic diagram of a connecting structure of a watch band and a dial plate according to the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic view of a structure of a fixed disk of the present utility model;

FIG. 4 is an enlarged view of the portion A of FIG. 3 according to the present utility model;

FIG. 5 is a schematic view of a fixed block structure according to the present utility model;

FIG. 6 is a schematic cross-sectional view of a fixing block according to the present utility model;

FIG. 7 is a schematic view of a first jack lever according to the present utility model;

fig. 8 is a schematic view of a second plugging rod according to the present utility model.

In the figure: 1. a fixed plate; 2. a fixed block; 3. a first plug rod; 4. a second plug rod; 5. a fixing ring; 6. a fixed rod; 7. a first plug hole; 8. the first limiting chute; 9. fixing the clamping block; 10. a flexible belt; 11. a limiting block; 12. a second plug hole; 13. a mounting groove; 14. a return spring; 15. the second limiting chute; 16. a sliding groove; 17. a limiting clamping plate; 18. a thread groove; 19. a limit sliding block; 20. a threaded portion; 21. a limit part; 22. an L-shaped limiting inserted link; 23. and a fixing plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-8, the present utility model discloses a connecting structure of a watchband and a dial, comprising: fixed disk 1 of fixed mounting at dial plate lateral wall still includes: the fixed block 2 is fixedly arranged on the outer side wall of one end of the watchband, the first inserting and connecting rod 3 is movably inserted into the two side walls of one end of the fixed block 2, one end of the first inserting and connecting rod 3 is fixedly connected with the reset spring 14 through the fixing bulge, one end of the reset spring 14 is fixedly connected with the inner cavity of the fixed block 2, and the fixed block 2 is assembled to shrink the first inserting and connecting rod 3 and the reset spring 14 into the inner cavity of the fixed block 2 when the dial plate is connected with the watchband, and is loosened when the dial plate is placed at one end of the fixed disc 1, so that the dial plate and the watchband are connected into a whole; the second inserting and connecting rods 4 are arranged on the side walls of the two ends of the fixed disc 1 and are positioned at the positions of the first inserting and connecting rods 3, and the second inserting and connecting rods 4 are used for limiting and fixing the first inserting and connecting rods 3 clamped in the inner cavity of one end of the fixed disc 1.

Specifically, fixed disk 1 includes fixed ring 5 of fixed mounting at the dial plate lateral wall, and fixed ring 5 lateral wall symmetry is provided with dead lever 6 to fixed ring 5 and dead lever 6 two integrated into one piece.

In this embodiment, the fixing ring 5 welded to the outer side wall of the dial plate and the fixing rod 6 integrally formed with the outer side wall of the fixing ring 5 are symmetrically welded, so that a fixing space can be provided when the watch band is fixed on the dial plate.

Specifically, the fixed block 2 comprises a fixed clamping block 9 fixedly arranged on the outer side wall of one end of the watchband, a flexible belt 10 is fixedly arranged on one side wall of the fixed clamping block 9, and a limiting block 11 is fixedly arranged on one side wall of the flexible belt 10.

In this embodiment, through the fixed fixture block 9 of welding at watchband one end lateral wall to its one end is through flexible band 10 fixedly connected with stopper 11, thereby can enough conveniently fix the watchband on the dial plate, can adjust the angle between fixed fixture block 9 and the stopper 11 through flexible band 10 again simultaneously, thereby can improve the comfort level that the wrist of the wrist-watch was worn in user department.

Specifically, a first inserting hole 7 for inserting the first inserting connection rod 3 is formed in the side wall of one end of the fixing rod 6, a second inserting hole 12 for inserting the first inserting connection rod 3 is formed in the two side walls of one end of the limiting block 11, and a mounting groove 13 for placing the reset spring 14 is formed in one end of the limiting block 11 and located at the position of the second inserting hole 12.

In this embodiment, through seting up the first spliced eye 7 at dead lever 6 one end lateral wall, thereby can make things convenient for first spliced pole 3 to shrink at the one end of fixed disk 1 and extend, through seting up the second spliced eye 12 at stopper 11 one end both sides wall, thereby can make the first spliced pole 3 in the first spliced eye 7 inner chamber peg graft on dead lever 6, and then can make watchband and the two joint of dial plate form a whole, through seting up the mounting groove 13 at stopper 11 one end and being located the second spliced eye 12 position, thereby can provide the space of placing for reset spring 14.

Specifically, a second limiting chute 15 is formed at one end of the limiting block 11 and located at the position of the second inserting hole 12, a limiting slide block 19 is movably arranged in an inner cavity of the second limiting chute 15, and one side wall of the limiting slide block 19 is fixedly connected with the outer side wall of the first inserting rod 3.

In this embodiment, the second limiting chute 15 formed at one end of the limiting block 11 and located at the position of the second plugging hole 12, and the limiting slide block 19, whose one side wall is fixedly connected with the outer side wall of the first plugging rod 3, are in clamping fit, so that the first plugging rod 3 can be further prevented from sliding out of the inner cavity of the second plugging hole 12.

Specifically, a sliding groove 16 is formed in the top of one end of the limiting block 11 and right above the second inserting hole 12, a limiting clamping plate 17 is fixedly mounted on the outer side wall of the first inserting connection rod 3, and the whole shape of the limiting clamping plate 17 is T-shaped.

In this embodiment, through seting up at stopper 11 one end top and being located the sliding tray 16 directly over the second spliced eye 12 to the outside wall welding of first spliced pole 3 has the spacing cardboard 17 that the overall shape is the T style of calligraphy, when needs are with watchband joint on the dial plate, through holding spacing cardboard 17 in the pinch, makes it move towards stopper 11 one end central point in the inner chamber of sliding tray 16, thereby can make things convenient for first spliced pole 3 shrink to the inner chamber of mounting groove 13.

Specifically, one end of the first plugging rod 3 is provided with a threaded groove 18, the second plugging rod 4 comprises a threaded part 20 for plugging the threaded groove 18, and one end outer side wall of the threaded part 20 is movably clamped with a limiting part 21; the whole limit part 21 is circular disc-shaped, the inside of the limit part 21 is in a hollow state, and meanwhile, the diameter of the limit part 21 is larger than that of the first plug hole 7.

In this embodiment, through seting up the screw thread recess 18 and the screw thread portion 20 between the 3 one end of first plug rod to can carry out spacing joint with the first plug rod 3 of pegging graft in the inner chamber of first spliced eye 7, and the one end activity joint of screw thread portion 20 has the diameter to be greater than the whole spacing portion 21 that is the circular discoid of cavity state of first spliced eye 7 diameter, thereby can be with the further spacing fixing of first plug rod 3 in the inner chamber of first spliced eye 7, and then can improve the connection stability between dial plate and the watchband.

Specifically, a first limiting chute 8 is formed at one end of the fixing rod 6 and located at two sides of the first inserting hole 7, and an L-shaped limiting inserting rod 22 for inserting the first limiting chute 8 is fixedly installed on a side wall of the limiting portion 21, which is close to the threaded portion 20.

In this embodiment, the second plugging rod 4 can be prevented from sliding out from the fixing rod 6 by means of the clamping fit between the first limiting sliding groove 8 formed at one end of the fixing rod 6 and located at two sides of the first plugging hole 7 and the L-shaped limiting plugging rod 22 welded on one side wall of the limiting portion 21, which is close to the threaded portion 20.

Specifically, a fixing plate 23 perpendicular to the side wall of the threaded portion 20 near the limiting portion 21 is fixedly installed on the side wall, and the fixing plate 23 is used for facilitating a user to rotate the second insertion connection rod 4.

In this embodiment, through welding at the side wall that is close to spacing portion 21 of screw thread portion 20 and rather than vertically fixed plate 23, when first spliced pole 3 pegged graft in first spliced pole 7 inner chamber, thereby can rotate screw thread portion 20 through fixed plate 23 in step, and then can conveniently rotate the joint between the screw thread recess 18 of its and first spliced pole 3 one end, when needs grafting dial plate and watchband, through rotating fixed plate 23, thereby can extract second spliced pole 4 from the inner chamber of screw thread recess 18, and then can make things convenient for the user to separate dial plate and watchband.

The working principle and the using flow of the utility model are as follows: when in use, the fixed ring 5 with the corresponding model in the fixed disk 1 is firstly arranged on the outer side wall of the dial with the corresponding model, the fixed clamping block 9 in the fixed block 2 is adhered on the outer side wall of one end of the watchband, when the fixed ring and the fixed clamping block are required to be clamped, the limiting clamping plates 17 of the outer side walls of the two groups of first inserting connection rods 3 which are inserted at one end of the limiting block 11 are firstly pinched so as to move towards opposite directions in the inner cavity of the sliding groove 16 formed at the top of the limiting block 11, thus the two groups of first inserting connection rods 3 can be contracted to one end of the limiting block 11 and positioned in the inner cavity of the mounting groove 13 formed at the position of the second inserting hole 12, at the moment, the side wall of one end of the first inserting connection rod 3 is flush with the side wall of one end of the limiting block 11, and the inner cavity which is positioned in the mounting groove 13 is fixedly connected with the reset spring 14, so that the reset spring 14 is synchronously compressed while the first inserting connection rod 3 is contracted, and one end of the fixed clamping block 9 is fixedly connected with the limiting block 11 through the flexible belt 10, so that the watchband can be conveniently fixed on the dial, meanwhile, the angle between the fixed clamping block 9 and the limiting block 11 can be adjusted through the flexible belt 10, so that the comfort degree of the wrist of a user is improved, then the contracted whole is placed at the position of the fixed rod 6 which is symmetrically welded on the outer side wall of the fixed ring 5 and is integrally formed with the fixed rod, because the first inserting hole 7 is formed on one side wall of the fixed rod 6, the first inserting rod 3 is positioned at the position of the first inserting hole 7, the limiting clamping plate 17 is loosened, the limiting plate is released, the limiting spring 14 is released, so that the first inserting rod 3 and the restoring spring 14 are restored to the initial position through the reverse elastic force, the first inserting rod 3 is clamped in the inner cavity of the first inserting hole 7, and through seting up the second spacing spout 15 and the spacing slider 19 that a lateral wall and the fixed continuous of first spliced pole 3 lateral wall of stopper 11 one end and being located second spliced pole 12 position between the two joint cooperation to can further prevent that first spliced pole 3 from sliding out from the inner chamber of second spliced pole 12.

When first plug rod 3 joint is in first spliced pole 7 inner chamber, through holding fixed plate 23 in the second plug rod 4, make it rotate along the pointer in the one end of first plug rod 3, through seting up between screw thread recess 18 and the screw thread portion 20 of first plug rod 3 one end, thereby can carry out spacing joint with the first plug rod 3 of pegging graft in first spliced pole 7 inner chamber, and the one end activity joint of screw thread portion 20 has the diameter to be greater than the whole spacing portion 21 that is the circular discoid of cavity state of first spliced pole 7 diameter, thereby can be with the further spacing of first plug rod 3 fix in the inner chamber of first spliced pole 7, and then can improve the connection stability between dial plate and the watchband.

When the dial plate and the watchband need be disassembled, the fixed plate 23 is pinched first to enable the fixed plate to synchronously drive the threaded portion 20 to rotate anticlockwise, the limiting portion 21 cannot rotate at the moment, the limiting portion 21 moves out of the inner cavity of the threaded groove 18, the first limiting sliding grooves 8 are formed in one end of the fixed rod 6 and are located on two sides of the first inserting hole 7, the L-shaped limiting inserting rod 22 is welded on one side wall of the limiting portion 21, which is close to the threaded portion 20, of the fixed plate, the second inserting rod 4 can be prevented from sliding out of the fixed rod 6 through clamping fit between the L-shaped limiting inserting rod 22, and then the limiting clamping plate 17 is pinched to enable the limiting clamping plate and the first inserting rod 3 to synchronously shrink into the inner cavity of the mounting groove 13 in the limiting block 11, so that inserting and disassembling between the watchband and the dial plate can be facilitated.

It should be noted that in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A connection structure of a wristband and a dial, comprising: fixed disk (1) of fixed mounting at dial plate lateral wall, its characterized in that still includes:

The fixed block (2) is fixedly arranged on the outer side wall of one end of the watchband, a first inserting-connecting rod (3) is movably inserted into two side walls of one end of the fixed block (2), one end of the first inserting-connecting rod (3) is fixedly connected with a reset spring (14) through a fixing protrusion, one end of the reset spring (14) is fixedly connected to the inner cavity of the fixed block (2), and the fixed block is assembled to shrink the first inserting-connecting rod (3) and the reset spring (14) to the inner cavity of the fixed block (2) when the dial plate is connected with the watchband, and is loosened when the dial plate is placed at one end of the fixed disc (1), so that the dial plate and the watchband are connected into a whole;

the second inserting and connecting rod (4) is arranged on the side walls of two ends of the fixed disc (1) and located at the position of the first inserting and connecting rod (3), and the second inserting and connecting rod (4) is used for limiting and fixing the first inserting and connecting rod (3) clamped in the inner cavity of one end of the fixed disc (1).

2. The structure for connecting a wristband to a dial as set forth in claim 1, wherein: the fixed disk (1) comprises a fixed ring (5) fixedly arranged on the outer side wall of the dial, fixed rods (6) are symmetrically arranged on the outer side wall of the fixed ring (5), and the fixed ring (5) and the fixed rods (6) are integrally formed.

3. The structure for connecting a wristband to a dial as claimed in claim 2, wherein: the fixing block (2) comprises a fixing clamping block (9) fixedly arranged on the outer side wall of one end of the watchband, a flexible belt (10) is fixedly arranged on one side wall of the fixing clamping block (9), and a limiting block (11) is fixedly arranged on one side wall of the flexible belt (10).

4. A watchband and dial attachment structure according to claim 3, wherein: the fixing device is characterized in that a first inserting hole (7) for inserting the first inserting rod (3) is formed in one end side wall of the fixing rod (6), a second inserting hole (12) for inserting the first inserting rod (3) is formed in two end side walls of the limiting block (11), and a mounting groove (13) for placing the reset spring (14) is formed in one end of the limiting block (11) and located at the position of the second inserting hole (12).

5. The structure for connecting a wristband to a dial as set forth in claim 4, wherein: the limiting block is characterized in that one end of the limiting block (11) is located at the position of the second inserting hole (12), a second limiting sliding groove (15) is formed in the position of the second inserting hole, a limiting sliding block (19) is movably arranged in an inner cavity of the second limiting sliding groove (15), and one side wall of the limiting sliding block (19) is fixedly connected with the outer side wall of the first inserting rod (3).

6. The structure for connecting a wristband to a dial as set forth in claim 4, wherein: the limiting block is characterized in that a sliding groove (16) is formed in the top of one end of the limiting block (11) and located right above the second inserting hole (12), a limiting clamping plate (17) is fixedly mounted on the outer side wall of the first inserting rod (3), and the whole shape of the limiting clamping plate (17) is T-shaped.

7. The structure for connecting a wristband to a dial as set forth in claim 4, wherein: the novel plug rod is characterized in that a threaded groove (18) is formed in one end of the first plug rod (3), the second plug rod (4) comprises a threaded portion (20) for being inserted into the threaded groove (18), and a limiting portion (21) is movably clamped on the outer side wall of one end of the threaded portion (20).

8. The structure for connecting a wristband to a dial as set forth in claim 7, wherein: the limiting part (21) is in a circular disc shape as a whole, the inside of the limiting part (21) is in a hollow state, and meanwhile, the diameter of the limiting part (21) is larger than that of the first inserting hole (7).

9. The structure for connecting a wristband to a dial as set forth in claim 7, wherein: first spacing spout (8) have been seted up just to dead lever (6) one end and be located first spliced eye (7) both sides, spacing portion (21) are close to a side wall fixed mounting of screw portion (20) has L type spacing inserted bar (22) that are used for pegging graft first spacing spout (8).

10. The structure for connecting a wristband to a dial as set forth in claim 7, wherein: a fixing plate (23) perpendicular to the threaded portion (20) is fixedly arranged on one side wall, close to the limiting portion (21), of the threaded portion, and the fixing plate (23) is used for facilitating a user to rotate the second inserting connection rod (4).