Built-in height adjusting structure of guide rail

Abstract

The utility model discloses a guide rail built-in height adjusting structure which comprises an adjuster and a locking block used for being relatively fixed on the outer side of a movable grooved rail, and the adjuster comprises an elastic swing plate used for swinging upwards out of a window in the top of the movable grooved rail to push up a drawer bottom plate and a seat body used for being inserted backwards into the movable grooved rail. The seat body is connected with a top roller used for jacking the elastic swing plate in a front-back sliding mode, an inverted pushed slope is formed on the lower side of the elastic swing plate, the top roller is connected with the pushed slope in an attached mode, the adjuster comprises a driving handle used for pushing the top roller, the driving handle comprises a handle body and an elastic locking arm, and the handle body is in driving connection with the top roller. Inverted teeth used for positioning the top roller are formed on the locking blocks, convex hooks are formed on the elastic locking arms, the convex hooks are connected with the corresponding inverted teeth in a hooking mode, and the convex hooks can be separated from the corresponding inverted teeth through swinging of the elastic locking arms. According to the height adjusting structure with the built-in guide rails, the height adjusting effect of the drawer panel is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the field of height adjustment structures of drawers, in particular to a guide rail built-in height adjustment structure. Background Art

[0002] At present, the left and right ends of the drawer are respectively connected to the cabinet body through guide rails for sliding. The fixed rails of the guide rails are installed on the inner wall of the cabinet body. The movable rails of the guide rails are relatively positioned with the drawer. During the installation of the drawer, if it is found that one side of the drawer panel (left and right) is higher than the other side, it is necessary to adjust the fixed rails up and down. However, the fixed rails are inside the cabinet body, so it is not convenient to adjust the fixed rails. Therefore, the relative position of the front end of the drawer bottom plate and the movable rail in the up and down direction can be adjusted. For example, reference can be made to "a three-dimensional adjustment handle" with a Chinese utility model patent publication number of CN208403746U, which is provided with upper and lower adjustment pieces. The adjustment The roller has an external thread, and the upper and lower adjusting plates have an oblique concave spiral groove that cooperates with the adjusting roller. The front end of the upper and lower adjusting plates has a working inclined surface acting between the slide rail and the drawer bottom plate. By rotating the adjusting roller to drive the upper and lower adjusting plates to move backward, the working inclined surface pushes up the drawer bottom plate, thereby adjusting the height position of the drawer panel. However, due to the large total weight of the drawer and the items inside the drawer, coupled with the vibration generated by opening and closing the drawer, it is easy to cause the adjusting roller to creep (rotate), causing the drawer to drop, thereby causing the drawer panel height adjustment to fail. Therefore, it is necessary to improve the height adjustment structure applied to the drawer in the prior art. Summary of the invention

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a guide rail built-in height adjustment structure, which is conducive to making the height adjustment effect of the drawer panel stable and reliable.

[0004] The purpose of the utility model is achieved through the following technical solutions.

[0005] The adjustable height adjustment device comprises an adjustable height adjustment device and a locking block for relatively fixing the adjustable height adjustment device on the outer side of the movable groove rail. The adjustable height adjustment device comprises an elastic swing plate for swinging upward out of a window at the top of the movable groove rail to push up the drawer bottom plate and a seat body for inserting backward into the movable groove rail. The seat body is slidably connected to a top roller for lifting the elastic swing plate, and an inverted pushed slope is formed on the lower side of the elastic swing plate. The top roller is abutted and connected to the pushed slope, and the top roller is arranged transversely. The adjuster comprises a driving handle for pushing the top roller, the driving handle comprises a handle body and an elastic locking arm, the handle body is driven and connected to the top roller, the locking block is formed with inverted teeth for positioning the top roller, the inverted teeth are arranged in a front-rear direction, a convex hook is formed on the elastic locking arm, the convex hook is hooked with the corresponding inverted teeth, and the convex hook can be disengaged from the corresponding inverted teeth by the swing of the elastic locking arm.

[0006] Preferably, the top roller includes a sliding shaft and a rotating sleeve, and sliding grooves are respectively formed at the left and right ends of the seat body. The left and right ends of the sliding shaft are respectively slidably arranged in the corresponding sliding grooves. The rotating sleeve is coaxially adapted to be arranged on the sliding shaft. Synchronous gear parts are respectively formed at the left and right ends of the rotating sleeve. The adjuster includes a cover plate, and a synchronous rack is formed on the lower side of the cover plate. The synchronous gear part is meshed and connected with the corresponding synchronous rack, and the handle body is connected to one end of the sliding shaft.

[0007] Preferably, anti-skid grooves are formed on the pushed slope.

[0008] Preferably, the cover plate includes a frame, the front end of the elastic swing plate is connected to the inner edge of the frame as a whole, the front end of the seat body is formed with a buckle plate, the rear end of the seat body is formed with a buckle edge, the rear end of the frame body is formed with a buckle hook, the buckle hook is hooked with the buckle edge, and the buckle plate is buckled to the upper side of the front end of the frame.

[0009] Preferably, a guide groove is formed on the seat body, an intermediate wheel is formed on the rotating sleeve, and the intermediate wheel is adapted to be rollingly connected in the guide groove.

[0010] Preferably, a driving plate is formed at the upper end of the handle body, a connecting hole is formed on the driving plate, and one end of the sliding shaft is inserted into the connecting hole.

[0011] Compared with the prior art, the utility model has the following beneficial effects: by setting an adjuster and a locking block relatively fixed to the outer side of the movable groove rail, the adjuster includes an elastic swing plate used to swing upward out of the window at the top of the movable groove rail to push up the drawer bottom plate and a seat body used to be inserted backward into the movable groove rail, the seat body is connected to a top roller for lifting the elastic swing plate by sliding forward and backward, the top roller is abutted against the pushed slope, the adjuster includes a driving handle for pushing the top roller, the convex hook is hooked with the corresponding inverted tooth, the convex hook can be disengaged from the corresponding inverted tooth by the swing of the elastic locking arm, thereby avoiding failure of the height adjustment structure due to vibration, which is conducive to making the height adjustment effect of the drawer panel stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front top view of the three-dimensional structure of the height adjustment structure and guide rail combination of the utility model.

[0013] Figure 2 It is a front top exploded schematic diagram of the height adjustment structure and guide rail combination of the utility model.

[0014] Figure 3 It is a schematic diagram of the cross-sectional structure of the height adjustment structure, guide rail and drawer combination of the utility model as viewed from the left.

[0015] Figure 4 It is a schematic diagram of the cross-sectional structure of the height adjustment structure of the utility model when viewed from the left.

[0016] Figure 5 It is a front top view of the three-dimensional structure of the height adjustment structure of the utility model.

[0017] Figure 6 It is a schematic diagram of the three-dimensional structure of the height adjustment structure of the utility model when viewed from the rear.

[0018] Figure 7 It is a top view of the three-dimensional structure of the height adjustment structure of the utility model with the cover plate and the locking block removed.

[0019] Figure 8 It is a schematic diagram of a rear-up stereoscopic cross-sectional structure of the height adjustment structure of the utility model.

[0020] Fig. 9 It is a bottom-up stereoscopic structural schematic diagram of the locking block of the utility model.

[0021] Fig.10 It is a bottom-up three-dimensional structural schematic diagram of the cover plate of the utility model.

[0022] Fig.11 It is a top view of the three-dimensional structure of the seat body and the driving handle combination of the utility model.

[0023] Fig.12It is a bottom-up stereoscopic structural schematic diagram of the seat body and the driving handle combination of the utility model.

[0024] Fig.13 It is a right-side stereoscopic structural schematic diagram of the driving handle of the utility model.

[0025] Fig.14 It is a left-side stereoscopic structural schematic diagram of the driving handle of the utility model.

[0026] Explanation of reference numerals: adjuster 1; seat body 11; guide groove 1101; buckle plate 1102; buckle edge 1103; slide groove 1104; convex rail 1105; cover plate 12; frame body 120; elastic swing plate 121; push slope 1210; anti-slip tooth groove 1211; buckle hook 123; synchronous rack 122; drive handle 13; handle body 131; sliding groove 1311; elastic locking arm 132; convex hook 1321; drive plate 133; connecting hole 1331; top roller 14; sliding shaft 140; rotating sleeve 1400; synchronous gear part 141; intermediate wheel 142; locking block 2; inverted tooth 21; elastic top plate 22; hook 23; movable groove rail 99; window 991; drawer 98; drawer bottom plate 981; drawer panel 982. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings.

[0028] The guide rail built-in height adjustment structure of the utility model is as follows: Figure 1 and Figure 2 As shown, it includes an adjuster 1 and a locking block 2 for being relatively fixed on the outer side of the movable groove rail 99, as shown in FIG. Fig. 9 As shown, an elastic top sheet 22 and a hook 23 are formed on one side of the locking block 2. The locking block 2 is moved toward the outer side of the movable groove rail 99 (in the left and right direction) so that the hook 23 passes through the through slot on the wall of the movable groove rail 99, and then the locking block 2 is pulled forward so that the hook 23 hooks the wall of the movable groove rail 99, and the front end of the through slot of the movable groove rail 99 also limits the forward movement of the hook 23. At the same time, the rear end of the elastic top sheet 22 presses against the inner edge of a rectangular hole in the movable groove rail 99 to prevent the locking block 2 from moving backward relative to the movable groove rail 99. Since the hook 23 hooks the wall of the movable groove rail 99, the locking block 2 cannot move left and right and up and down relative to the movable groove rail 99, thereby quickly fixing the locking block 2 and the movable groove rail 99 relatively.

[0029] like Figures 1 to 5 As shown, the regulator 1 includes an elastic swing plate 121 for swinging upward out of the window 991 at the top of the movable groove rail 99 to push up the drawer bottom plate 981 and a seat body 11 for inserting backward into the movable groove rail 99, as shown in FIG. Figure 4 and Figure 7As shown, the seat body 11 is slidably connected to a top roller 14 for lifting the elastic swing plate 121, as shown in FIG. Figure 3 As shown, an inverted push slope 1210 is formed on the lower side of the elastic swing plate 121, that is, the push slope 1210 is set downward, and the top roller 14 is close to the push slope 1210, that is, the top roller 14 is located on the lower side of the elastic swing plate 121, and the top roller 14 is set horizontally, that is, the axis of the top roller 14 is extended in the left and right direction. Figure 5 and Figure 6 As shown, the regulator 1 includes a driving handle 13 for pushing the top roller 14, and the driving handle 13 includes a handle body 131 and an elastic locking arm 132. Fig.13 and Fig.14 As shown, the upper end of the handle body 131 is integrally connected with the upper end of the elastic locking arm 132, and a gap is left between the lower end of the handle body 131 and the lower end of the elastic locking arm 132, so that the elastic locking arm 132 can elastically open and close and swing relative to the handle body 131. The handle body 131 drives the top roller 14, that is, the handle body 131 can push the top roller 14 to move forward and backward. Fig. 9 As shown, the locking block 2 is formed with inverted teeth 21 for positioning the top roller 14, and the inverted teeth 21 are arranged in the front-to-back direction. Fig.14 As shown, the elastic locking arm 132 is formed with a convex hook 1321. Figure 6 As shown, the convex hook 1321 is hooked with the corresponding inverted tooth 21 , and the convex hook 1321 can be detached from the corresponding inverted tooth 21 through the swing of the elastic locking arm 132 .

[0030] During the assembly process, the regulator 1 can be first inserted into the front end of the movable groove rail 99. The movable groove rail 99 is a groove shell-shaped structure. The groove of the movable groove rail 99 is set downward, and the front and rear ends of the movable groove rail 99 are through-set. The groove edge of the movable groove rail 99 is also formed with an inner folding edge. Therefore, after the seat body 11 is inserted into the movable groove rail 99 from front to back, the shape of the seat body 11 is adapted to the inner cavity of the movable groove rail 99, so that the seat body 11 cannot move up and down or left and right, so as to Figure 1 and Figure 2 As an example, the locking block 2 is then pressed rightward against the left side of the movable groove rail 99, and the locking block 2 and the movable groove rail 99 are fixed relative to each other according to the steps described above, such as Figure 8 As shown, a concave position is formed on the left side of the seat body 11, and the hook 23 of the locking block 2 is inserted into the corresponding concave position to prevent the seat body 11 from shifting forward relative to the movable groove rail 99. In addition, a flange is formed at the front end of the seat body 11, and the flange is abutted against the front end surface of the movable groove rail 99, thereby preventing the seat body 11 from moving backward relative to the movable groove rail 99. Figure 3 As shown, the drawer 98 includes a drawer bottom plate 981 and a drawer front plate 982 , and the drawer bottom plate 981 is arranged on the top of the movable groove rail 99 .

[0031] When the height position of the drawer panel 982 needs to be adjusted, the driving handle 13 is pushed backward, and the driving handle 13 drives the top roller 14 to move backward. Since the top roller 14 is attached to the push-receiving slope 1210, Figure 1 , Figure 3 and Figure 4 As shown, the top roller 14 slides along the pushed slope 1210 (climbing), so that the pushed slope 1210 is lifted up by the top roller 14, so that the elastic swing plate 121 elastically swings upward, and the movable end of the elastic swing plate 121 first passes through the window 991 upward and protrudes out of the top of the movable groove rail 99, so that the movable end of the elastic swing plate 121 contacts and lifts the drawer bottom plate 981, thereby adjusting the drawer panel 982 upward; in the process of driving the handle 13 to move backward, due to the unidirectional characteristics of the inverted teeth 21, the convex hook 1321 of the elastic locking arm 132 will be squeezed and pushed away by the inverted teeth 21, so that the elastic locking arm 132 is retracted and swung relative to the handle body 131, so that the convex hook 1321 can pass over the inverted teeth 21 backward; when the adjustment is completed, the elastic locking arm 132 is reset and swung, so that the convex hook 1321 is hooked upward between the corresponding two adjacent inverted teeth 21. Since the inverted teeth 21 are used to position the top roller 14, in other words, Figure 4 and Figure 6 For example, since the gravity of the drawer 98 and the elastic restoring force of the elastic swing plate 121 generate a forward component force on the top roller 14, the inverted teeth 21 are used to prevent the top roller 14 from moving forward. Fig. 9 As shown, the inverted teeth 21 are arranged backwards, and the convex hooks 1321 are buckled on the rear sides of the corresponding inverted teeth 21, so that the inverted teeth 21 prevent the driving handle 13 from shifting forward, and the inverted teeth 21 can indirectly position the top roller 14 through the driving handle 13, that is, the inverted teeth 21 can position the elastic swing plate 121, so that the drawer panel 982 is locked in the current position, avoiding the vibration caused by the gravity of the drawer 98 and the items in the drawer 98, which causes the top roller 14 and the elastic swing plate 121 to creep, thereby avoiding adjustment failure and facilitating the height adjustment effect of the drawer panel to be stable and reliable; when the drawer panel 982 needs to be adjusted downward, pinch the handle body 131 and the elastic locking arm 132 with two fingers to narrow the gap between the handle body 131 and the elastic locking arm 132, that is, to make the elastic locking arm 132 swing elastically, as shown in FIG. Figure 6 As shown in FIG. 1 , the convex hook 1321 on the elastic locking arm 132 can be slightly displaced downward, so that the convex hook 1321 is separated from the inverted tooth 21 on the lower side of the locking block 2, and the driving handle 13 is moved in the reverse direction (at Figure 3In the embodiment of the present invention, in order to move the driving handle 13 forward), the elastic swing plate 121 can swing downward by elastic recovery, so that the drawer 88 descends by gravity, and the drawer panel 982 is adjusted downward. After the adjustment is completed, the driving handle 13 is released, and the elastic locking arm 132 elastically resets and swings to make the convex hook 1321 engage with the corresponding inverted tooth 21. The utility model builds the regulator 1 into the front end of the movable groove rail 99, and sets the elastic swing plate 121 to be able to swing out of the window 991 of the movable groove rail 99, so that the elastic swing plate 121 can directly lift the drawer bottom plate 981.

[0032] Furthermore, if Figure 7 As shown, the top roller 14 includes a sliding shaft 140 and a rotating sleeve 1400, and a sliding groove 1104 is formed at the left and right ends of the seat body 11, as shown in FIG. Figure 7 and Fig.11 As shown, the left and right ends of the sliding shaft 140 are respectively slidably disposed in the corresponding sliding grooves 1104, as shown in FIG. Figure 7 As shown, the rotating sleeve 1400 is coaxially adapted to be mounted on the sliding shaft 140, and the left and right ends of the rotating sleeve 1400 are respectively formed with synchronous gear parts 141, as shown in FIG. Figure 5 As shown, the regulator 1 includes a cover plate 12, such as Fig.10 As shown, a synchronous rack 122 is formed on the lower side of the cover plate 12. Figure 8 As shown, the synchronous gear portion 141 is meshedly connected with the corresponding synchronous rack 122, that is, the number of the synchronous racks 122 is set to two, and the two synchronous racks 122 are distributed left and right, as shown in FIG. Figure 7 As shown, the handle body 131 is connected to one end of the sliding shaft 140, that is, to prevent the elastic swing of the elastic locking arm 132 from interfering with the connection between the driving handle 13 and the sliding shaft 140, since the synchronous gear part 141 is meshed and connected with the corresponding synchronous rack 122, the top roller 14 is prevented from moving asynchronously at both ends, so that the axis of the top roller 14 is kept in the left and right direction during the forward and backward movement of the top roller 14, so that the top roller 14 can lift the elastic swing plate 121 in a balanced manner, and it is conducive to making the top roller 14 move flexibly. Fig.10 As shown, the elastic swing plate 121 can be a shell mechanism, and the push slopes 1210 are distributed at the left and right ends of the elastic swing plate 121. When the top roller 14 moves forward and backward, the rotating sleeve 1400 rotates on the sliding shaft 140. The synchronous rack 122 is located on the outer side of the elastic swing plate 121.

[0033] Furthermore, if Fig.10 As shown, an anti-skid tooth groove 1211 is formed on the pushed slope 1210. Figure 4 and Figure 8As shown, the outer cylindrical surface of the rotating sleeve 1400 contacts the push slope 1210, and the anti-slip tooth groove 1211 engages the outer cylindrical surface of the rotating sleeve 1400, thereby increasing the relative sliding resistance between the rotating sleeve 1400 and the push slope 1210. During the adjustment process, the above resistance helps to resist the gravity of the drawer 98, preventing the drawer 98 from easily shifting downward when the human hand slightly reduces the backward support force of the driving handle 13, which is conducive to the manual fine-tuning of the height of the drawer panel 982. Figure 4 As shown, the pushed slope 1210 may be in the shape of an arc that is slightly concave upward.

[0034] Furthermore, if Fig.10 As shown, the cover plate 12 includes a frame 120, and the front end of the elastic swing plate 121 is connected to the inner edge of the frame 120 as a whole, that is, the elastic swing plate 121 is located in the frame 120, and the rear end of the elastic swing plate 121 is a movable end. Fig.11 As shown, a buckle piece 1102 is formed at the front end of the seat body 11. Fig.12 As shown, the rear end of the seat body 11 is formed with a buckle edge 1103, and the buckle edge 1103 is arranged to face downward. Fig.10 As shown, a buckle hook 123 is formed at the rear end of the frame 120. Figure 4 As shown, the buckle hook 123 is hooked with the buckle edge 1103, and the buckle piece 1102 is buckled on the upper side of the front end of the frame 120, so that the cover 12 and the base 11 are assembled together, avoiding the need to use a screw installation structure, which is conducive to the rapid installation of the cover 12.

[0035] Furthermore, if Figure 7 As shown, a guide groove 1101 is formed on the seat body 11, and the guide groove 1101 is extended in the front-to-back direction. An intermediate wheel 112 is formed on the rotating sleeve 1400, and the intermediate wheel 112 is adapted to be rollingly connected in the guide groove 1101, that is, the lower part of the intermediate wheel 112 is radially inserted into the guide groove 1101. When the top roller 14 moves back and forth, the intermediate wheel 112 rolls in the guide groove 1101 to prevent the top roller 14 from axial displacement.

[0036] Furthermore, if Fig.13 As shown, a driving plate 133 is formed at the upper end of the handle body 131, and a connecting hole 1331 is formed on the driving plate 133. One end of the sliding shaft 140 is inserted into the connecting hole 1331. Figure 7 As shown, the handle body 131 can drive the sliding shaft 140 to move forward and backward through the edge of the connecting hole 1331. Figure 7 As shown, first insert the drive plate 133 upward into the seat body 1, and then move the drive handle 13 backward, as shown in FIG. Fig.13 As shown, a sliding groove 1311 is formed on the right side of the driving handle 13. Figure 8As shown, the convex rail 1105 in the seat body 11 is relatively inserted into the sliding groove 1311, so that the driving handle 13 can move linearly back and forth relative to the seat body 11, and then one end of the sliding shaft 140 is inserted into the connecting hole 1331, and the top roller 14 is placed on the sliding groove 1104, and the middle wheel 112 is also inserted into the guide groove 1101, and the front end of the frame 120 is inserted obliquely forward and downward into the lower side of the buckle piece 1102, and then the cover plate 12 is swung to make the buckle 123 descend, and the inner wall of the seat body 11 pushes the buckle 123 forward, so that the buckle 123 elastically swings forward and deforms, and when the lower end of the buckle 123 reaches the buckle edge 1103 position, the buckle 123 elastically resets and swings backward so that the lower end of the buckle 123 is buckled on the lower side of the buckle edge 1103, and the installation process of the above-mentioned cover plate 2 is relatively simple.

Claims

1. A guide rail built-in height adjustment structure, characterized in that: The invention comprises an adjuster (1) and a locking block (2) for being relatively fixed on the outside of a movable groove rail (99), the adjuster (1) comprising an elastic swing plate (121) for swinging upward out of a window (991) at the top of the movable groove rail (99) to push up a drawer bottom plate (981), and a seat body (11) for being inserted backward into the movable groove rail (99), the seat body (11) being slidably connected to a top roller (14) for lifting up the elastic swing plate (121) in a forward and backward manner, an inverted push-receiving slope (1210) being formed on the lower side of the elastic swing plate (121), the top roller (14) being abutted against the push-receiving slope (1210), and the top roller (14) being arranged transversely, so that The regulator (1) comprises a driving handle (13) for pushing the top roller (14), the driving handle (13) comprising a handle body (131) and an elastic locking arm (132), the handle body (131) drivingly connected to the top roller (14), the locking block (2) being formed with inverted teeth (21) for positioning the top roller (14), the inverted teeth (21) being arranged in a front-to-back direction, the elastic locking arm (132) being formed with a convex hook (1321), the convex hook (1321) being hooked with the corresponding inverted tooth (21), and the convex hook (1321) being able to swing away from the corresponding inverted tooth (21) through the elastic locking arm (132).

2. According to claim 1, the guide rail built-in height adjustment structure is characterized in that: The top roller (14) comprises a sliding shaft (140) and a rotating sleeve (1400), the left and right ends of the seat body (11) are respectively formed with sliding grooves (1104), the left and right ends of the sliding shaft (140) are respectively slidably arranged in the corresponding sliding grooves (1104), the rotating sleeve (1400) is coaxially adapted to be arranged on the sliding shaft (140), the left and right ends of the rotating sleeve (1400) are respectively formed with synchronous gear parts (141), the regulator (1) comprises a cover plate (12), the lower side of the cover plate (12) is formed with a synchronous rack (122), the synchronous gear part (141) is meshedly connected with the corresponding synchronous rack (122), and the handle body (131) is connected to one end of the sliding shaft (140).

3. According to claim 2, the guide rail built-in height adjustment structure is characterized in that: An anti-slip tooth groove (1211) is formed on the pushed slope (1210).

4. According to claim 2, the guide rail built-in height adjustment structure is characterized in that: The cover plate (12) comprises a frame (120), the front end of the elastic swing plate (121) is connected to the inner edge of the frame (120) as a whole, the front end of the base (11) is formed with a buckle plate (1102), the rear end of the base (11) is formed with a buckle edge (1103), the rear end of the frame (120) is formed with a buckle hook (123), the buckle hook (123) is hooked with the buckle edge (1103), and the buckle plate (1102) is buckled to the upper side of the front end of the frame (120).

5. According to claim 2, the guide rail built-in height adjustment structure is characterized in that: A guide groove (1101) is formed on the seat body (11), and an intermediate wheel (112) is formed on the rotating sleeve (1400), wherein the intermediate wheel (112) is adapted to be rollingly connected in the guide groove (1101).

6. The guide rail built-in height adjustment structure according to claim 2, characterized in that: A driving plate (133) is formed at the upper end of the handle body (131), a connecting hole (1331) is formed on the driving plate (133), and one end of the sliding shaft (140) is inserted into the connecting hole (1331).

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